Caterpillarmotor grader
Caterpillar 120
Maintenance schedule, common problems & OEM parts breakdown
The Caterpillar 120 is a vintage motor grader built roughly from 1963 to 1972, before the line continued as the 120B and later the 120G, 120H, and 120K. Early production blocks, identified by serial prefixes 89G and 60H, run a Cat D333A diesel rated around 115 to 121 hp through a direct-drive transmission with an oil clutch and no torque converter. Later production blocks (prefixes 10R, 22R, 13U, 90R, E92, and E94) moved to a powershift transmission with six forward and six reverse gears; sources disagree on whether these later blocks kept the D333 or used a 3306, so that point is treated as unresolved rather than settled. The earliest 89G-block machines operated at roughly 10.7 t (23,700 lb). No factory predecessor is documented for the 120; Caterpillar replaced it with the 120B around 1972.
The biggest change across the production run is the drivetrain: early direct-drive machines with an oil clutch gave way to powershift transmissions on later blocks, trading a simpler direct-drive layout for easier shifting at the cost of added transmission complexity. Work tools stayed fairly consistent for the era: a moldboard around 4.3 m (14 ft), hydraulic side-shift on later production, a mid-mount scarifier, and an optional snow wing plow worked by lever and cable, all under a standard open canopy since enclosed cabs were dealer or aftermarket additions. Six decades after the last one left the factory, parts support for this line is thin and buyers typically rely on salvage machines, shops that can fabricate wear parts, and antique-equipment networks rather than a current dealer parts counter. Demand today comes mostly from collectors and antique-equipment enthusiasts restoring a piece of grader history, plus working farms and ranches that still keep one of these machines running on private roads and lanes.
Below: full specifications, fluids & capacities, the factory service schedule, common service parts, verified fault codes, what owners discuss, attachment guidance, the complete assembly directory, and a serial-number reference. Complete parts lists with full OEM part numbers, exploded diagrams, quantities, and fitment data are available free in Heavy Parts AI.
Caterpillar 120 specifications
Engine
| Engine, direct-drive blocks (89G/60H, mid-1960s) | Cat D333A 6-cylinder diesel. Direct drive with oil clutch, no torque converter. Bore 114 mm x stroke 140 mm (4-1/2 in x 5.5 in). Rated 85.7 kW (115 hp). |
| Engine, late-1960s block (14K/35K) | Same direct-drive, oil-clutch architecture as the earlier block (no torque converter, no powershift). Specific engine model not separately documented for this serial range in available sources. |
| Engine, powershift blocks (10R/22R through 13U/90R, circa 1970-1973) | Varies by source. Per the Army technical manual covering the 90R-and-up serial range: Cat D333 6-cylinder diesel, 8.8 L (538 in3) displacement, 90 kW (121 hp) at 2,000 rpm, paired with a 6-forward/6-reverse powershift transmission. Separate documentation for a unit in this same serial block instead identifies the engine as a Cat 3306 6-cylinder diesel with a 6-speed powershift transmission. Confirm against the engine tag for your specific serial number. |
| Cylinders | 6, on every documented production block. |
Weights
| Operating weight, direct-drive block (89G, mid-1960s) | Approximately 10,750 kg (23,700 lb). |
| Operating weight, other blocks (14K/35K, 10R/22R, 13U/90R, E92/E94) | Not documented in publicly available sources for these exact serial ranges. Likely somewhat heavier than the direct-drive 89G block once the powershift transmission is fitted, but no verifiable figure found. Confirm with your dealer or a serial-specific parts book. |
| Shipping weight | Not documented in publicly available sources for any production block of this machine. |
Dimensions
| Moldboard | 4.27 m (14 ft) side-shift moldboard, documented on both a direct-drive-block unit and a powershift-block unit. |
| Tires | 14.00-24 documented on a direct-drive-block (14K) unit. 13.00-24 documented on a powershift-block (90R/13U) unit. Fitment varies by block and original spec. |
| Transport length, width, height, wheelbase, ground clearance | Not documented in publicly available sources for this vintage machine. |
Performance
| Transmission, direct-drive blocks (89G/60H, 14K/35K) | Manual stick-shift with oil clutch, no torque converter. Documented as 6 forward / 2 reverse on a 1968-built (14K block) unit. |
| Transmission, powershift blocks (10R/22R through 13U/90R) | 6-forward / 6-reverse powershift. This gear count is consistent between the Army technical manual for the 90R-and-up range and separate documentation for a unit in the same serial block, even though those two sources disagree on the engine model. |
| Travel speeds (per gear) | Not documented in publicly available sources for this vintage machine. |
| Blade pull / down force | Not documented in publicly available sources for this vintage machine. |
Service capacities (summary)
| Fuel tank (powershift block) | 283.9 L (75 US gal), per a parts-manual capacities chart for this block. |
| Cooling system (powershift block) | 41.6 L (11 US gal), same source. |
| Engine oil, with filter (powershift block) | 27.4 L (7.25 US gal), same source. |
| Hydraulic system (powershift block) | 17.0 L (4.5 US gal), same source. |
| Capacities, direct-drive blocks (89G/60H, 14K/35K) | Not documented separately in available sources. The figures above are specific to the powershift-block engine and transmission and may not apply to the earlier direct-drive blocks. |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
120 fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) — Cat D333 diesel, 6-cyl, 538 in³ (8.8 L), rated 121 hp at 2,000 rpm; covers the powershift-equipped production block (90R military / 13U civilian and later, the end of the run before the line was succeeded by the 120B) | 27.4 L (7.25 US gal) | Era-correct heavy-duty diesel engine oil, single-grade SAE 30 for temperate ambient range (the machine's own technical manual references SAE 30 oil elsewhere in its service procedures, consistent with this being the era-baseline grade). Drop to SAE 10W for cold starts, step up to SAE 40 for sustained hot climates. This predates Caterpillar's later named engine-oil product lines — match to a heavy-duty diesel oil of the correct API service class available at time of service, or ask a Cat dealer for the closest modern cross-reference. |
| Cooling system | 41.6 L (11 US gal) | Ethylene glycol antifreeze mixed with water, roughly 50/50 for freeze protection, plus a supplemental coolant additive for corrosion and cavitation protection — standard practice for this engine generation. This predates Caterpillar's later Extended Life Coolant product. |
| Fuel tank | 283.9 L (75 US gal) | No. 2-D diesel fuel, per period specification. No low-sulfur or biodiesel-blend requirements apply to this engine generation. |
| Transmission — powershift unit with torque converter, 6 forward/6 reverse speeds (90R/13U-and-later production block) | 75.7 L (20 US gal) | Period-correct powershift transmission oil; on machines of this generation the transmission commonly ran the same SAE 30-grade oil used in the engine. Caterpillar had not yet introduced its later named drivetrain-oil products for this class of machine — confirm against the serial-range-specific manual. Note: the earlier direct-drive, oil-clutch production of this grader (no torque converter) is a different arrangement with its own unconfirmed capacity; do not apply this figure to that configuration. |
| Rear axle / bevel-gear differential housing | 35.0 L (9.25 US gal) | SAE 90 extreme-pressure gear lubricant, standard for gear-type differential housings of this era. |
| Tandem drive housings, each side | 22.7 L (6 US gal) per side | SAE 90 extreme-pressure gear lubricant, same as the rear axle/differential housing. |
| Hydraulic system — blade lift, circle drive, and steering circuit, including reservoir | 17.0 L (4.5 US gal) | Engine-oil-grade hydraulic fluid (SAE 10W in cold climates, SAE 30 in warm climates) was standard practice for implement hydraulics of this era, ahead of Caterpillar's later dedicated hydraulic-oil products. Confirm viscosity against the serial-specific manual. |
| Steering and blade-control mechanical housings — power-control worm-and-gear box, power-control housing, blade-lift drive housing, circle-reverse-control housing, and transfer-gear housing | Combined about 15 L (4.2 US gal) across the group: worm-and-gear box 1.9 L (0.5 US gal); power-control housing 7.6 L (2 US gal); blade-lift drive housing 3.8 L (1 US gal); circle-reverse-control housing 2.4 L (2.5 US qt); transfer-gear housing 0.33 L (0.7 US pt) | SAE 90 gear lubricant, same as the final-drive housings. |
| Grease — chassis pivot points, drawbar, circle, blade-lift linkage, and wheel/pin bearings | Spec only — no single reservoir; this grader carries a large number of individual grease fittings spread across the frame and blade linkage | NLGI 2 multipurpose chassis grease, standard for this era. Moly-fortified or lithium-complex branded greases had not yet entered Caterpillar's lineup for a machine this old. |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Caterpillar 120 maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
| Every 4,000 h |
|
Servicing the 120 beyond the schedule
Predictive maintenance & fluid analysis
This grader has no ECM and no stored fault codes, so condition monitoring means reading mechanical gauges and catching wear early. Watch the oil-pressure warning light and buzzer, coolant-temperature gauge, and charging ammeter every shift; any deviation signals a developing problem rather than a logged code. Send D333/D333A engine oil out for lab analysis at each oil change to track bearing and liner wear before it causes a failure. On powershift blocks, sample transmission fluid for metal content to catch clutch-pack wear before it strands the machine.
Corrective & common repairs
Common failure points on this vintage 120 center on the drivetrain and moving-metal wear surfaces. On direct-drive blocks, a slipping or grabbing oil clutch usually traces to worn release-lever fingers or glazed clutch discs and needs periodic finger-clearance adjustment. On powershift blocks, harsh or delayed shifts point to worn clutch packs or low pump pressure. Circle and drawbar wear strips take the brunt of grading loads and need regular inspection and shimming. Moldboard cutting edges and end bits wear unevenly and should be rotated or replaced before base metal is exposed.
Overhaul & rebuild points
A D333/D333A block nearing overhaul typically shows falling oil pressure, rising blow-by, and coolant or oil cross-contamination; inspect cylinder liners, main and rod bearings, and the water pump before committing to a full rebuild. On oil-clutch machines, relining the clutch discs and resurfacing the pressure plate restores direct-drive engagement; on powershift blocks, rebuild kits for the clutch packs and control valve address slipping shifts. Circle gear and pinion wear, king pin and tie-rod looseness, and worn drawbar ball-and-socket joints round out the major rebuild items on a grader this age.
Seasonal & environment servicing
Cold starts on this mechanically governed, pre-ECM diesel depend on battery condition and clean fuel free of water and wax. Drain the fuel tank sump and check the air-cleaner service indicator before winter work. Grease every chassis and circle-drive fitting more often in mud or dusty conditions, since the open canopy leaves linkages exposed with no sealed cab to keep contaminants out. Before snow season, check the snow wing plow's lever and cable actuation for free movement. In hot, dusty climates, clean the radiator core and check drive-belt tension more often to prevent overheating.
120 common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 5S-8056 | Accessory Drive And Primary Fuel Filter | Fuel system service | Check fitment → |
| 7S-6638 | Oil Filter Assembly | Lubrication service | Check fitment → |
| 6H-6000 | Film-Warning Left Side Of Filter Opening On Seat Frame | Scheduled service item | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
120 fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| Engine oil pressure warning light and buzzer | Panel light and audible buzzer activate when engine oil pressure drops below the safe running range, sensed by a pressure switch on the engine block | Low oil level, worn or failing oil pump, plugged oil filter, or a faulty pressure switch/wiring | Stop the engine immediately, check oil level and filter condition, and inspect the pressure switch before restarting |
| Engine oil pressure gauge | Needle reads below the normal operating band on the dash-mounted gauge, giving a continuous pressure reading independent of the warning light | Same causes as low oil pressure: thin/diluted oil, worn bearings, pump wear, or a plugged suction screen | Shut down and check oil level, oil condition, and pump/relief valve before further operation |
| Engine coolant temperature gauge in high/red range | Dash gauge needle moves into the high or red segment of the scale, indicating the engine coolant is running above normal operating temperature | Low coolant level, blocked or fouled radiator core, slipping or broken fan belt, or a stuck closed thermostat | Reduce engine load, idle down, and check coolant level, belt tension, and radiator/fan for obstruction once safe to do so |
| Air cleaner service indicator | A restriction indicator (piston or diaphragm type) mounted on or near the air cleaner shows a colored signal when intake air restriction reaches the service point | Dirty or clogged air cleaner element, or a collapsed/leaking intake hose upstream of the indicator | Service or replace the air cleaner element and reset the indicator; inspect intake piping for leaks or damage |
| Transmission/torque converter oil temperature gauge in high range | On the later powershift-transmission block, a dash gauge shows converter or transmission oil temperature climbing above the normal operating band | Low transmission oil level, sustained heavy load or stall conditions, or a plugged transmission oil cooler | Reduce load and allow the unit to cool, then check oil level and inspect the cooler for restriction |
| Charging system ammeter showing discharge | Dash-mounted ammeter needle swings to the discharge side, indicating the generator/alternator is not adequately charging the battery | Slipping or broken generator/alternator drive belt, worn brushes, faulty regulator, or a loose/corroded wiring connection | Check belt tension and condition, inspect wiring connections, and test the generator/alternator and regulator |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
120 attachments & work tools
Moldboard / grading blade
Factory grading moldboard measured about 4.3 m (14 ft) on documented production units, with hydraulic side-shift fitted on later production. Parts literature for this bare model number spans several distinct serial blocks, so minor width and mounting-hardware differences exist between an early block and a later one; match the parts book to your exact serial prefix before ordering wear parts.
Scarifier / ripper
A mid-mounted scarifier, set ahead of the front axle for better cut-depth control and operator visibility, is documented for this grader. Owner accounts of surviving units also describe a working ripper/tooth arrangement, consistent with the soil-breaking tools period parts books list for this machine.
Snow wing plow
Some production units in the parts literature carry a wing-plow option: an auxiliary moldboard mounted to one side of the machine to widen the cleared path in snow or windrow work. On a mechanical-era grader like this the wing is raised, lowered, and angled by hand lever and cable run rather than a dedicated hydraulic circuit.
Mounting / hitch arrangement
This grader predates hydraulic quick-couplers. The moldboard bolts to a circle that rides in the drawbar, with replaceable wear strips and shoes taking up clearance; the scarifier and any wing tool mount on their own bolted brackets ahead of or beside the main frame. Every grading and attachment function is run by hand levers, with cable runs to the wing where one is fitted, not electro-hydraulic controls.
Transmission configuration
Factory production under this bare number spans two drivetrain generations. Earlier production (documented on an early-1960s serial block) used a direct-drive powertrain with an oil clutch and foot-clutch stick shift. Later production (documented into the early 1970s, including a military-contract example) moved to a 6-speed powershift transmission. Confirm which drivetrain a given unit has from its serial prefix rather than assuming one across the whole run.
Operator station
Base production came through with an open, canopy-covered operator's station typical of graders from this era. Enclosed cabs seen on surviving machines are aftermarket additions from a cab manufacturer or dealer, not a factory-fitted option documented in period literature.
Tires / wheel fitment
Documented tire fitment on a surviving unit is 13.00-24. Because this bare model number covers multiple serial blocks over roughly a decade of production, tread pattern and size may vary by block; verify against the parts book for your machine's serial prefix.
All 120 assemblies by section
Every catalogued assembly group for the Caterpillar 120. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Attachments
6d7160 Accelerator And Decelerator Control Group
| 6D***60 | Accelerator And Decelerator Control Group | 1 |
6j7361 Accumulator Charging Valve Group
| 6J***61 | Accumulator Charging Valve Group | 1 |
8j8761 Accumulator Charging Valve Group
| 8J***61 | Accumulator Charging Valve Group | 1 |
7d3476 Accumulator Group
| 7D***76 | Accumulator Group | 1 |
7d7320 Air Cleaner Extension Group
| 7D***20 | Air Cleaner Extension Group | 1 |
1p2814 Air Cleaner Group
| 1P***14 | Air Cleaner Group | 1 |
9d2565 Air Conditioner Arrangement--Factory Installation
| 0S***90 | Bolt; (3/8-16x2in)(Clip Thru Spacer To Bracket As) | 4 |
| 0S***91 | Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***82 | 16 |
| 1P***22 | Air Conditioner Group | 1 |
8d1715 Air Conditioner Arrangement--Factory Installation
| 0S***91 | Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***82 | 20 |
| 1P***22 | Air Conditioner Group | 1 |
| 1P***23 | Console Group-Control | 1 |
1p3322 Air Conditioner Group--Part 3 Of 3
| 1P***22 | Air Conditioner Group | 1 |
1p3322 Air Conditioner Group--Part 2 Of 3
| 1P***22 | Air Conditioner Group | 1 |
1p3322 Air Conditioner Group--Part 1 Of 3
| 1P***22 | Air Conditioner Group | 1 |
7d7760 Air Conditioner Wiring Group
| 1P***76 | Relay As; (Air Cond.) | 1 |
| 1P***77 | Terminal-- To Compressor | 2 |
| 1P***78 | Body --To Compressor | 2 |
7d5200 Alternator Arrangement--24 Volt, 50 Ampere
| 7D***00 | Alternator Arrangement | 1 |
| 8S***85 | Alternator Group-Charging; Alternator Group | 1 |
| 9S***73 | Circuit Breaker (60 Amps); Circuit Breaker-60 Ampere | 1 |
5s9088 Alternator Assembly--24 Volt, 50 Ampere--Part 1 Of 2
| 5S***88 | Alternator Group-Charging | 1 |
5s9088 Alternator Assembly--24 Volt, 50 Ampere--Part 2 Of 2
| 5S***88 | Alternator Group-Charging | 1 |
8s4285 Alternator Group--24 Volt, 50 Ampere--Type 2
| 8S***85 | Alternator Group-Charging; Alternator Group | 1 |
8s4285 Alternator Group--24 Volt, 50 Ampere
| 8S***85 | Alternator Group-Charging; Alternator Group | 1 |
8d5005 Back-Up Warning Group--Factory Installation
| 8D***05 | Back-Up Warning Group | 1 |
8d4995 Back-Up Warning Group--Factory Installation
| 8D***95 | Back-Up Warning Group | 1 |
7d9375 Basic Alarm Group--Type 1
| 7D***75 | Basic Alarm Group | 1 |
7d9375 Basic Alarm Group--Type 2
| 7D***75 | Basic Alarm Group | 1 |
7d8089 Basic Lamp Group--24 Volt, Signal Lamp
| 7D***89 | Basic Lamp Assembly | 1 |
7d8086 Basic Switch Group--24 Volt--Signal Lamp
| 7D***86 | Basic Switch Group | 1 |
8d4800 Battery Door Group--Factory Installation
| 8D***00 | Battery Door Group | 1 |
3d6380 Battery Group--24 Volt, 172 Ampere Hours
| 3D***80 | Battery Group | 1 |
4d8483 Blade Cylinder Assembly--102 Mm (4") Bore X 1219 Mm (48") Stroke
| 4D***83 | Blade Cylinder Assembly | 1 |
5d3061 Blade Extension Group--R.H.--2 Foot
| 5D***62 | Blade Extension Group | 1 |
5d4800 Blade Group--14 Foot
| 5D***00 | Blade Group | 1 |
5d4790 Blade Group--12 Foot
| 5D***90 | Blade Group; Blade Group | 1 |
8s7748 Blower Fan And Guard Group
| 8S***48 | Blower Fan And Guard | 1 |
5d8415 Brake Assembly--R.H.--2 Required
| 5D***15 | Brake Assembly | 1 |
8d6520 Parking Brake Control Group--Part 1 Of 2--Type 1
| 8D***20 | Brake Control Group; Parking Brake Control Group | 1 |
8d6520 Parking Brake Control Group--Part 2 Of 2--Type 1
| 8D***20 | Brake Control Group; Parking Brake Control Group | 1 |
8d6520 Parking Brake Control Group--Part 2 Of 2--Type 2
| 8D***20 | Brake Control Group; Parking Brake Control Group | 1 |
8d6520 Parking Brake Control Group--Part 1 Of 2--Type 2
| 8D***20 | Brake Control Group; Parking Brake Control Group | 1 |
7d480 Brake Group--Type 1
| 7D***80 | Brake Group | 1 |
7d480 Brake Group--Type 2
| 7D***80 | Brake Group | 1 |
7d6980 Cab Arrangements
| 2D***49 | Cab Door, Rear Window And Side Panel Group | 1 |
| 4D***10 | Defroster Fan Group | 1 |
| 4D***60 | Windshield And Front Panel Group | 1 |
7d6970 Cab Arrangements
| 2D***50 | Cab Door, Rear Window And Side Panel Group | 1 |
| 4D***10 | Defroster Fan Group | 1 |
| 4D***50 | Windshield And Front Panel Group | 1 |
2d7349 Cab Door, Rear Window And Side Panel Group
| 2D***49 | Cab Door, Rear Window And Side Panel Group | 1 |
2d3150 Cab Door, Rear Window And Side Panel Group
| 2D***50 | Cab Door, Rear Window And Side Panel Group | 1 |
8d1770 Cab Group
| 8D***70 | Cab Group | 1 |
7d4750 Cab Group
| 7D***50 | Cab Group | 1 |
6d7570 Cab Heater Group--24 Volt
| 6D***70 | Cab Heater Group | 1 |
8d9785 Cab Heater Group--24 Volt
| 8D***85 | Cab Heater Group | 1 |
9d425 Cab Heater Group--24 Volt
| 9D***25 | Cab Heater Group | 1 |
4d4490 Canopy Group--Front View
| 4D***90 | Canopy Group | 1 |
2d6400 Centershift Group--Split Rack--Type 2
| 2D***00 | Centershift Group; Centershift Group | 1 |
2d6400 Centershift Group--Split Rack--Type 1
| 2D***00 | Centershift Group; Centershift Group | 1 |
2d3507 Circle Group--Type 1
| 2D***07 | Circle Group | 1 |
2d3507 Circle Group--Type 2
| 2D***07 | Circle Group | 1 |
Circle Reversing Mechanism--Type 1
Circle Reversing Mechanism--Type 2
1p2780 Refrigerant Compressor Group--Type 1
| 1P***80 | Compressor Group-Refrigerant | 1 |
1p2780 Refrigerant Compressor Group--Type 2
| 1P***80 | Compressor Group-Refrigerant | 1 |
1p3323 Control Console Group
| 1P***23 | Console Group-Control | 1 |
Control Gp-Parking Brake
| 1A***60 | Capscrew, Hex Head (1/2 - 13 X 2 G5); (Hex Head) (1/2-13x2 Gd 8 Z) | 5 |
| 1D***19 | Nut-Retainer To Fan Bracket Assembly | 5 |
| 3B***08 | Lockwasher Handrails To Dash | 5 |
7d3805 Control Valve Assembly
| 7D***05 | Control Valve Assembly | 1 |
8s3747 Protection Cover Group--Oil Filler Cap
| 8S***47 | Cover Group-Protection; Protection Cover Group-- Oil Filler Cap | 1 |
2s6096 Protection Cover Group--Radiator Cap
| 2S***96 | Cover Group-Protection; Protection Cover Group-- Radiator Cap | 1 |
3d2219 Master Cylinder Assembly
| 3D***19 | Cylinder As | 1 |
7d5648 Master Cylinder Assembly
| 7D***48 | Cylinder As-Master | 1 |
6d689 Power Cylinder Assembly
| 6D***89 | Cylinder As-Power | 1 |
7d5649 Power Cylinder Assembly
| 7D***49 | Cylinder As-Power Master | 1 |
7d7740 Defroster Duct Group
| 7D***40 | Defroster Duct Group | 1 |
4d3810 Defroster Fan Group--24 Volt
| 4D***10 | Defroster Fan Group | 1 |
9d1290 Defrosting Fan Group--24 Volt
| 9D***90 | Defrosting Fan Group | 1 |
1p271 Direct Electric Starting Arrangement--24 Volt
| 1P***71 | Direct Electric Starting Arrangement | 1 |
| 3D***80 | Battery Group | 1 |
| 7S***22 | Starting Motor Group-Electric; Electric Starting Motor Group | 1 |
1p7839 Electric Starting Motor Group--Prestolite--24 Volt--Part 1 Of 2
| 1P***39 | Electric Starting Motor Group | 1 |
1p7838 Electric Starting Motor Group--Delco-Remy--24 Volt--Part 1 Of 3
| 1P***38 | Electric Starting Motor Group | 1 |
2p6162 Electric Starting Motor Group--Prestolite--24 Volt--Part 2 Of 2
| 2P***62 | Electric Starting Motor Group | 1 |
1p7838 Electric Starting Motor Group--Delco-Remy--24 Volt--Part 2 Of 3
| 1P***38 | Electric Starting Motor Group | 1 |
1p7838 Electric Starting Motor Group--Delco-Remy--24 Volt--Part 3 Of 3
| 1P***38 | Electric Starting Motor Group | 1 |
2p6162 Electric Starting Motor Group--Prestolite--24 Volt--Part 1 Of 2
| 2P***62 | Electric Starting Motor Group | 1 |
1p7839 Electric Starting Motor Group--Prestolite--24 Volt--Part 2 Of 2
| 1P***39 | Electric Starting Motor Group | 1 |
7s4243 Fan And Guard Group--Reversible Blade--Type 2
| 7S***43 | Fan And Guard Group | 1 |
7s4243 Fan And Guard Group--Reversible Blade--Type 1
| 7S***43 | Fan And Guard Group | 1 |
2p2700 Fan Drive Group
| 2P***00 | Fan Drive Group | 1 |
2p5662 Fan Drive Group--Type 2
| 2P***62 | Fan Drive Group | 1 |
2p5662 Fan Drive Group--Type 1
| 2P***62 | Fan Drive Group | 1 |
7d6910 Front Wheel Group--15.5 X 25 Tubeless Tires--Type 1
| 7D***10 | Front Wheel Group | 1 |
7d6910 Front Wheel Group--15.5 X 25 Tubeless Tires--Type 2
| 7D***10 | Front Wheel Group | 1 |
7d6740 Lighting Group--Rotating Amber Warning--24 Volt
| 7D***40 | Fuel System | 1 |
8f9866 Grease Gun
| 8F***66 | Grease Gun As | 1 |
7d7590 Head Lamp Group--24 Volt--Rear View
| 7D***90 | Head Lamp Group | 1 |
9d455 Head Lamp Group--24 Volt--Rear View
| 9D***55 | Head Lamp Group | 1 |
9d465 Head Lamp Group--24 Volt--Rear View
| 9D***65 | Head Lamp Group | 1 |
7d7580 Head Lamp Group--24 Volt--Rear View
| 7D***80 | Head Lamp Group | 1 |
9d1445 Head, Stop And Tail Lamp Arrangement
| 8D***60 | Stop Lamp Group; Stop Lighting Group | 1 |
| 9D***45 | Head Stop And Tail Lamp Arrangement | 1 |
| 9D***60 | Lighting Group | 1 |
7d7600 For Use Without Cab - 24 Volt
| 5D***80 | Stop Lamp Group | 1 |
| 7D***80 | Head Lamp Group | 1 |
| 7D***00 | Head, Stop And Tail Lamp Arrangement | 1 |
7d7610 For Use With Cab - 24 Volt
| 5D***80 | Stop Lamp Group | 1 |
| 7D***90 | Head Lamp Group | 1 |
| 7D***10 | Head, Stop And Tail Lamp Arrangement | 1 |
8d1930 Heater And Air Conditioner Group
| 8D***30 | Heater And Air Conditioner Group; Heater And Air Conditioner Lines Group | 1 |
9d2575 Heater And Air Conditioner Lines Group
| 9D***75 | Heater And Air Conditioner Lines Group | 1 |
5d3136 Heater Assembly--24 Volt
| 5D***36 | Heater Assembly | 1 |
7k2785 Heater Assembly
| 7K***85 | Heater Group | 1 |
8d8360 Hood And Battery Door Arrangement--Factory Installation
| 3D***80 | Hood Side Door Group | 1 |
| 8D***00 | Battery Door Group | 1 |
| 8D***60 | Hood And Battery Door Arrangement | 1 |
5d4650 Hood And Battery Door Group
| 5D***50 | Hood And Battery Door Group | 1 |
8d4740 Hood Group--Factory Installation
| 8D***40 | Hood Group | 1 |
3d2580 Hood Side Door Group
| 3D***80 | Hood Side Door Group | 1 |
4d7520 Protection Cover Group--Instrument Panel
| 4D***20 | Instrument Protection Cover Group; Protection Cover Group | 1 |
2p3226 Jacket Water Heater Group
| 2P***26 | Jacket Water Heater Group | 1 |
7m7147 Combination Stop And Tail Lamp Assembly--24 Volt
| 7M***47 | Lamp As-Stop & Tail | 1 |
1m6052 Head Lamp Assembly--24 Volt--Type 1
| 1M***52 | Lamp Group | 1 |
7d8565 Lamp Group--24 Volt
| 7D***65 | Lamp Group | 1 |
1m6052 Head Lamp Assembly--24 Volt--Type 2
| 1M***52 | Lamp Group | 1 |
1m3387 Dash Lamp Assembly--24 Volt
| 1M***87 | Lamp Group | 1 |
7d6930 Lighting Group--24 Volt
| 7D***30 | Lighting Group | 1 |
9d1660 Lighting Group--24 Volt--Type 2
| 9D***60 | Lighting Group | 1 |
9d6750 Lighting Group--Pulsating Amber Warning--24 Volt
| 9D***50 | Lighting Group | 1 |
9d1660 Lighting Group--24 Volt--Type 1
| 9D***60 | Lighting Group | 1 |
7d8670 Lighting Group--Warning
| 7D***70 | Lighting Group | 1 |
3d9137 Master Cylinder Assembly
| 3D***37 | Master Cylinder Assembly | 1 |
6d175 Master Power Cylinder Assembly
| 6D***75 | Master Power Cylinder Assembly | 1 |
2p5610 Muffler Group
| 2P***10 | Muffler Group | 1 |
Name Plates And Transfers
| 1M***63 | Plate-Heat-Start Switch Instructions; On Instrument Panel | 1 |
| 1P***79 | Plate--Lubrication Instructions | 1 |
| 2D***51 | Plate Control Box Instructions L.H.; Plate--Control Box Instruction-L.H. | 1 |
8d2930 Noise Suppression Arrangement--Factory Installation
| 2P***22 | Exhaust Elbow | 1 |
| 2P***10 | Muffler Group | 1 |
| 2P***62 | Fan Drive Group | 1 |
8d4730 Noise Suppression Group
| 8D***30 | Noise Suppression Group | 1 |
7d3320 Odometer Group--Miles
| 7D***20 | Odometer Group | 1 |
7d6950 Odometer Group--Kilometers
| 7D***50 | Odometer Group | 1 |
7d6940 Odometer Group--Miles
| 7D***40 | Odometer Group | 1 |
6d8365 Overlay End Bit Group
| 4F***57 | Bolt-Plow; (5/8-11x2.75-In) | 10 |
| 6D***04 | End Bit (Right Hand) | 2 |
| 6D***65 | Overlay End Bit Group | 1 |
6d8355 Overlay End Bit Group
| 4F***57 | Bolt-Plow; (5/8-11x2.75-In) | 10 |
| 6D***48 | End Bit | 2 |
| 6D***55 | Overlay End Bit Group | 1 |
8d9240 Parking Brake Arrangement--Factory Installation
| 7D***70 | Parking Brake Group | 1 |
| 8D***20 | Brake Control Group; Parking Brake Control Group | 1 |
| 8D***40 | Parking Brake Arrangement | 1 |
8d250 Parking Brake Arrangement
| 7D***70 | Parking Brake Group | 1 |
| 8D***30 | Parking Brake Control Group | 1 |
| 8D***50 | Parking Brake Arrangement | 1 |
8d240 Parking Brake Arrangement
| 7D***70 | Parking Brake Group | 1 |
| 8D***90 | Parking Brake Control Group | 1 |
| 8D***40 | Parking Brake Arrangement | 1 |
8d9820 Parking Brake Arrangement--Field Installation
| 8D***20 | Parking Brake Arrangement | 1 |
| 8D***50 | Parking Brake Group; Parking Brake Control Group | 1 |
| 8D***70 | Parking Brake Control Group | 1 |
8d230 Parking Brake Control Group--Part 1 Of 2--Type 2
| 8D***30 | Parking Brake Control Group | 1 |
8d230 Parking Brake Control Group--Part 2 Of 2--Type 2
| 8D***30 | Parking Brake Control Group | 1 |
8d230 Parking Brake Control Group--Part 1 Of 2--Type 1
| 8D***30 | Parking Brake Control Group | 1 |
8d190 Parking Brake Control Group--Part 2 Of 2--Type 1
| 8D***90 | Parking Brake Control Group | 1 |
8d190 Parking Brake Control Group--Part 1 Of 2--Type 2
| 8D***90 | Parking Brake Control Group | 1 |
8d190 Parking Brake Control Group--Part 2 Of 2--Type 2
| 8D***90 | Parking Brake Control Group | 1 |
8d9870 Parking Brake Control Group--Part 2 Of 2
| 8D***70 | Parking Brake Control Group | 1 |
8d190 Parking Brake Control Group--Part 1 Of 2--Type 1
| 8D***90 | Parking Brake Control Group | 1 |
8d9870 Parking Brake Control Group--Part 1 Of 2
| 8D***70 | Parking Brake Control Group | 1 |
8d230 Parking Brake Control Group--Part 2 Of 2--Type 1
| 8D***30 | Parking Brake Control Group | 1 |
7d5870 Parking Brake Group
| 7D***70 | Parking Brake Group | 1 |
8d9850 Parking Brake Group
| 8D***50 | Parking Brake Group; Parking Brake Control Group | 1 |
7d6610 Power Blade Arrangement--12 Foot
| 2D***07 | Circle Group | 1 |
| 4D***83 | Blade Cylinder Assembly | 1 |
| 4D***10 | Support Group-Blade Bracket | 1 |
7d6615 Power Blade Arrangement--14 Foot
| 2D***07 | Circle Group | 1 |
| 4D***83 | Blade Cylinder Assembly | 1 |
| 4D***10 | Support Group-Blade Bracket | 1 |
5m2734 Prescreener Group
| 5M***34 | Prescreener Group | 1 |
5d2530 Protection Cover Group--Fuel Tank Cap
| 5D***30 | Protection Cover Group; Cover Group Fuel Tank Cap | 1 |
5d2660 Protection Cover Group--Hydraulic Tank Cap
| 5D***60 | Protection Cover Group; Cover Group Hydraulic Tank Cap | 1 |
8s7746 Radiator Group--Rear View--Type 2--Part 1 Of 2
| 8S***46 | Radiator; Radiator Group | 1 |
8s7746 Radiator Group--Rear View--Type 1--Part 1 Of 2
| 8S***46 | Radiator; Radiator Group | 1 |
8s7746 Radiator Group--Side View--Type 1--Part 2 Of 2
| 8S***46 | Radiator; Radiator Group | 1 |
8s7746 Radiator Group--Side View--Type 2--Part 2 Of 2
| 8S***46 | Radiator; Radiator Group | 1 |
8d1300 Radiator Guard And Support Group
| 8D***00 | Radiator Guard And Support Group | 1 |
7d6920 Rear Wheel Group--15.5 X 25 Tubeless Tires--Type 1
| 7D***20 | Rear Wheel Group | 1 |
7d6920 Rear Wheel Group--15.5 X 25 Tubeless Tires--Type 2
| 7D***20 | Rear Wheel Group | 1 |
2d3070 Rear Window Group
| 2D***70 | Rear Window Group | 1 |
5d180 Rear Window Wiper Group--24 Volt--Type 1
| 5D***80 | Rear Window Wiper Group | 1 |
5d180 Rear Window Wiper Group--24 Volt--Type 3
| 5D***80 | Rear Window Wiper Group | 1 |
5d180 Rear Window Wiper Group--24 Volt--Type 2
| 5D***80 | Rear Window Wiper Group | 1 |
9d6760 Rear Window Wiper Group--24 Volt
| 9D***60 | Rear Window Wiper Group | 1 |
2p2701 Refrigerant Compressor Arrangement
| 0S***91 | Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***82 | 4 |
| 1P***34 | Pipe Assembly | 1 |
| 1P***14 | Crankshaft Pulley | 1 |
1p3086 Refrigerant Compressor Group--Type 1
| 1P***86 | Refrigerant Compressor Group | 1 |
1p3086 Refrigerant Compressor Group--Type 2
| 1P***86 | Refrigerant Compressor Group | 1 |
1p3086 Refrigerant Compressor Group--Type 3
| 1P***86 | Refrigerant Compressor Group | 1 |
1p3086 Refrigerant Compressor Group--Type 4
| 1P***86 | Refrigerant Compressor Group | 1 |
1p3324 Return Air Console Group
| 1P***24 | Return Air Console Group | 1 |
8d2200 Rim Group
| 8D***00 | Rim Group | 1 |
8d6358 Roll-Over Protective Structure--With Untinted Glass
| 8D***58 | Roll-Over Protective Structure | 1 |
8d6302 Roll-Over Protective Structure Group
| 8D***02 | Roll-Over Protective Structure Group | 1 |
9d2595 Roll-Over Protective Structure Group
| 9D***95 | Roll-Over Protective Structure Group | 1 |
9d330 Roll-Over Protective Structure--With Tinted Glass
| 9D***30 | Roll-Over Protective Structure Group | 1 |
9d2590 Roll-Over Protective Structure Group
| 9D***90 | Roll-Over Protective Structure Group | 1 |
9d265 Roll-Over Protective Structure--Factory Installation--Part 2 Of 2
| 9D***65 | Roll-Over Protective Structure Group | 1 |
9d265 Roll-Over Protective Structure--Factory Installation--Part 1 Of 2
| 9D***65 | Roll-Over Protective Structure Group | 1 |
8d2040 Mounting Group--Field Installation
| 8D***40 | Roll-Over Protective Structure Mounting Group | 1 |
8d3730 Roll-Over Protective Structure Mounting Group--Factory Installation--Type 2
| 8D***30 | Roll-Over Protective Structure Mounting Group | 1 |
8d3730 Roll-Over Protective Structure Mounting Group--Factory Installation--Type 1
| 8D***30 | Roll-Over Protective Structure Mounting Group | 1 |
Scarifier Controls--Type 2
Scarifier Controls--Type 1
6d3300 Scarifier Group--"V" Type--11 Teeth--46" Swath--Type 2
| 6D***00 | Scarifier Group | 1 |
6d3300 Scarifier Group--"V" Type--11 Teeth--46" Swath--Type 1
| 6D***00 | Scarifier Group | 1 |
6d3300 Scarifier Group--"V" Type--11 Teeth--46" Swath--Type 3
| 6D***00 | Scarifier Group | 1 |
9d5600 Service Brake Control Arrangement--Part 1 Of 2--Field Installation
| 9D***00 | Service Brake Control Arrangement | 1 |
9d5600 Service Brake Control Arrangement--Part 2 Of 2--Field Installation
| 9D***00 | Service Brake Control Arrangement | 1 |
9d8240 Service Latch Group
| 9D***40 | Service Latch Group | 1 |
9d8250 Service Latch Group
| 9D***50 | Service Latch Group | 1 |
9k682 Shaft And Link Assembly
| 9K***82 | Shaft & Link As | 1 |
7d8410 Signal Lighting Group--24 Volt--Without Cab--Type 1
| 7D***10 | Signal Lighting Group | 1 |
7d8410 Signal Lighting Group--24 Volt--Without Cab--Type 2
| 7D***10 | Signal Lighting Group | 1 |
7d8390 Signal Lighting Group--24 Volt--With Cab--Type 1
| 7D***90 | Signal Lighting Group | 1 |
9d1425 Signal Lighting Group--24 Volt
| 9D***25 | Signal Lighting Group | 1 |
7d8390 Signal Lighting Group--24 Volt--With Cab--Type 2
| 7D***90 | Signal Lighting Group | 1 |
4n7752 Electric Starting Motor Group--Prestolite--Part 1 Of 2
| 4N***52 | Starting Motor Group-Electric; Electric Starting Motor Group --Prestolite | 1 |
7s3622 Starting Motor Group--24 Volt--Type 2
| 7S***22 | Starting Motor Group-Electric; Electric Starting Motor Group | 1 |
4n3182 Electric Starting Motor Group--Delco-Remy--24 Volt--Part 3 Of 3
| 4N***82 | Starting Motor Group-Electric; Electric Starting Motor Group-- Delco-Remy | 1 |
7s3622 Starting Motor Group--24 Volt--Type 3
| 7S***22 | Starting Motor Group-Electric; Electric Starting Motor Group | 1 |
4n3182 Electric Starting Motor Group--Delco-Remy--24 Volt--Part 2 Of 3
| 4N***82 | Starting Motor Group-Electric; Electric Starting Motor Group-- Delco-Remy | 1 |
4n3182 Electric Starting Motor Group--Delco-Remy--24 Volt--Part 1 Of 3
| 4N***82 | Starting Motor Group-Electric; Electric Starting Motor Group-- Delco-Remy | 1 |
7s3622 Starting Motor Group--24 Volt--Type 1
| 7S***22 | Starting Motor Group-Electric; Electric Starting Motor Group | 1 |
4n7752 Electric Starting Motor Group--Prestolite--Part 2 Of 2
| 4N***52 | Starting Motor Group-Electric; Electric Starting Motor Group --Prestolite | 1 |
8d6610 Steering Gear Cover Group--Factory Installation
| 8D***10 | Steering Gear Cover Group | 1 |
8d3860 Stop Lamp Group--24 Volt--As Viewed From Right Hand Side Of Machine
| 8D***60 | Stop Lamp Group; Stop Lighting Group | 1 |
5d5880 Stop Lamp Group--24 Volt--As Viewed From Right Hand Side Of Machine
| 5D***80 | Stop Lamp Group | 1 |
7s1162 Suction Fan Group
| 7S***62 | Suction Fan Group | 1 |
4d8510 Blade Bracket Group
| 4D***10 | Support Group-Blade Bracket | 1 |
6n5123 Solenoid Switch Assembly
| 6N***23 | Switch As-Solenoid | 1 |
4m1812 Solenoid Switch Assembly
| 4M***12 | Switch As-Solenoid | 1 |
6d423 Tandem Front Brake Group
| 6D***23 | Tandem Front Brake Group | 1 |
8d7630 Third And Fourth Reverse Gear Group
| 8D***30 | Third And Fourth Reverse Gear Group | 1 |
6d6160 Third And Fourth Reverse Gear Group
| 6D***60 | Third And Fourth Reverse Gear Group | 1 |
6d4200 Tire Pump Group--Type 1
| 6D***00 | Tire Pump Group | 1 |
6d4200 Tire Pump Group--Type 2
| 6D***00 | Tire Pump Group | 1 |
9s7978 Tool Group
| 9S***78 | Tool Group-Hand | 1 |
7d6470 Valve And Lines Group--Part 1 Of 2-Type 1
| 7D***70 | Valve And Lines Group | 1 |
7d6470 Valve And Lines Group--Part 1 Of 2--Type 2
| 7D***70 | Valve And Lines Group | 1 |
7d6470 Valve And Lines Group--Part 2 Of 2--Type 1
| 7D***70 | Valve And Lines Group | 1 |
7d6470 Valve And Lines Group--Part 2 Of 2--Type 2
| 7D***70 | Valve And Lines Group | 1 |
7d4527 Valve Assembly
| 7D***27 | Valve Assembly | 1 |
3d2532 Valve Assembly
| 3D***32 | Valve Assembly | 1 |
7d5749 Valve Group
| 7D***49 | Valve Group | 1 |
9d470 Vandalism Protection Arrangement
| 2S***96 | Cover Group-Protection; Protection Cover Group-- Radiator Cap | 1 |
| 5D***30 | Protection Cover Group; Cover Group Fuel Tank Cap | 1 |
| 5D***60 | Protection Cover Group; Cover Group Hydraulic Tank Cap | 1 |
8d3010 Vandalism Protection Arrangement
| 2S***96 | Cover Group-Protection; Protection Cover Group-- Radiator Cap | 1 |
| 4D***20 | Instrument Protection Cover Group; Protection Cover Group | 1 |
| 5D***30 | Protection Cover Group; Cover Group Fuel Tank Cap | 1 |
1p2820 Water Lines Group--Type 1
| 1P***20 | Water Lines Group | 1 |
1p2820 Water Lines Group--Type 2
| 1P***20 | Water Lines Group | 1 |
2d7348 Rear Window Group
| 2D***48 | Window Group-Rear | 1 |
4d4060 Windshield And Front Panel Group
| 4D***60 | Windshield And Front Panel Group | 1 |
4d4050 Windshield And Front Panel Group
| 4D***50 | Windshield And Front Panel Group | 1 |
5d2586 Wiper Assembly--24 Volt
| 5D***86 | Windshield Wiper Assembly | 1 |
4d4080 Windshield Wiper Group--24 Volt--Type 2
| 4D***80 | Windshield Wiper Group | 1 |
8d1452 Wiper Group--24 Volt
| 8D***52 | Windshield Wiper Group | 1 |
9d1340 Windshield Wiper Group--24 Volt--Type 1
| 9D***40 | Windshield Wiper Group | 1 |
4d4080 Windshield Wiper Group--24 Volt--Type 1
| 4D***80 | Windshield Wiper Group | 1 |
4d4080 Windshield Wiper Group--24 Volt--Type 3
| 4D***80 | Windshield Wiper Group | 1 |
9d1340 Windshield Wiper Group--24 Volt--Type 2
| 9D***40 | Windshield Wiper Group | 1 |
1v3079 Basic Wiper Group--24 Volt
| 1V***79 | Wiper Group | 1 |
1v4358 Basic Wiper Group--24 Volt--Field Installation
| 1V***58 | Wiper Group; Basic Wiper Group | 1 |
Clutch, Transmission And Grader
Front Axle (2d4140 N/S)
| 2D***40 | Axle Group-Front | 1 |
Front Axle (2d4140 N/S)--Sectional Views
| 2D***40 | Axle Group-Front | 1 |
Rear Axle (7d7630 N/S)
| 7D***30 | Axle Group-Rear | 1 |
2g4186 Bearing Assembly
| 2G***86 | Bearing Assembly | 1 |
5d2220 Blade Group--12 Foot
| 5D***20 | Blade Group | 1 |
Blade Lift (8b3455 N/S)--Sectional View Of Gear Housing--Part 2 Of 2
| 8B***55 | Blade Lift | 1 |
Blade Lift (8b3455 N/S)--Side View--Part 1 Of 2
| 8B***55 | Blade Lift | 1 |
Blade Lift (8b3455 N/S)
| 8B***55 | Blade Lift | 1 |
Blade Lift (8b3455 N/S)--Sectional Rear View Of Gear Housing--Part 2 Of 2
| 8B***55 | Blade Lift | 1 |
Blade Lift (8b3455 N/S)--Sectional Rear View Of Gear Housing
| 8B***55 | Blade Lift | 1 |
5d8645 Brake Assembly--R.H.
| 5D***45 | Brake Assembly--R.H.,Brake Assembly--L.H. | 1 |
Transmission Case And Covers (5d3400 N/S)--Side View--Part 1 Of 2
| 5D***00 | Case & Covers Group-Tmsn | 1 |
Transmission Case And Covers (5d3400 N/S)--End View--Part 2 Of 2
| 5D***00 | Case & Covers Group-Tmsn | 1 |
Transmission Case And Covers (5d3400 N/S)-End View-Part 2 Of 2
| 5D***00 | Case & Covers Group-Tmsn | 1 |
Centershift
Circle (5d3390 N/S)
| 5D***90 | Circle | 1 |
Clutch And Brake Controls (5d3372 N/S)-Front View-Part 1 Of 2
| 5D***72 | Clutch And Brake Controls | 1 |
Clutch And Brake Controls (5d3372 N/S)--Front View--Part 1 Of 2
| 5D***72 | Clutch And Brake Controls | 1 |
Clutch And Brake Controls (5d3372 N/S)--Side View--Part 2 Of 2
| 5D***72 | Clutch And Brake Controls | 1 |
9d4630 Clutch Disc Group--Field Installation
| 7D***51 | Plate | 2 |
| 7D***24 | Disc Assembly | 3 |
| 9D***30 | Clutch Disc Group | 1 |
Flywheel Clutch (6d1590 N/S)
| 6D***90 | Clutch Group-Flywheel | 1 |
4d7850 Control Valve Assembly
| 4D***50 | Control Valve Assembly | 1 |
4j4115 Steering Cylinder Group--4" Bore X 6" Stroke
| 4J***15 | Cylinder Group-Steer | 1 |
2d2150 Filter Group
| 2D***50 | Filter Group | 1 |
7d5460 Oil Filter Group
| 7D***60 | Filter Group-Oil | 1 |
Flag Socket (4b7880 N/S)
| 4B***80 | Flag Socket | 1 |
Frame (7d6230 N/S)--Rear Half--Part 1 Of 2
Frame (7d6230 N/S)--Rear Half-Part 1 Of 2
Frame (7d6230 N/S)--Front Half-Part 2 Of 2
Front Wheels And Tires--13.00 X 24 Tubeless Tires
Gear Shift (5d3220 N/S)--Part 2 Of 2
| 5D***20 | Gear Shift | 1 |
Gear Shift (5d3220 N/S)--Part 1 Of 2
| 5D***20 | Gear Shift | 1 |
Gear Shift (5d3220 N/S)-Part 1 Of 2
| 5D***20 | Gear Shift | 1 |
Hood And Dash
Hub Cap
Hydraulic Brake
Hydraulic Brake Control (6d2480 N/S)
| 6D***80 | Hydraulic Brake Control | 1 |
4d4661 Hydraulic Pump Assembly
| 4D***61 | Hydraulic Pump Assembly | 1 |
Hydraulic Steering Gear (4d7175 N/S)--As Viewed From Right Hand Side Of Machine--Part 2 Of 3
| 4D***75 | Hydraulic Steering Gear | 1 |
Hydraulic Steering Gear (4d7175 N/S)--As Viewed From Right Hand Side Of Machine--Part 1 Of 3
| 4D***75 | Hydraulic Steering Gear | 1 |
Hydraulic Steering Gear (4d7175 N/S)--Top View--Part 3 Of 3
| 4D***75 | Hydraulic Steering Gear | 1 |
8d1565 Joint Assembly
| 8D***65 | Joint Assembly | 1 |
8d1504 Joint Assembly
| 8D***04 | Joint Assembly | 1 |
8d2569 Joint Assembly
| 8D***69 | Joint Assembly | 1 |
8d1564 Joint Assembly
| 8D***64 | Joint Assembly | 1 |
8d1503 Joint Assembly
| 8D***03 | Joint Assembly | 1 |
8d2568 Joint Assembly
| 8D***68 | Joint Assembly | 1 |
8d450 Leaning Wheel Control Shaft Group
| 8D***50 | Leaning Wheel Control Shaft Group | 1 |
Transmission Lubrication System (7d9550 N/S)
| 7D***50 | Lubrication Group-Transmission | 1 |
2d9600 Master Cylinder Assembly
| 2D***00 | Master Cylinder Assembly | 1 |
Power Control (5d5850 N/S)--Front View--Part 1 Of 2
| 5D***50 | Power Control | 1 |
Power Control (5d5850 N/S)--Side View--Part 1 Of 2
| 5D***50 | Power Control | 1 |
Power Control (5d5850 N/S)--Front View--Part 2 Of 2
| 5D***50 | Power Control | 1 |
Power Control (5d5850 N/S)--Side View--Part 2 Of 2
| 5D***50 | Power Control | 1 |
Power Control Drive Shaft
Rear Axle (2d3460 N/S)
| 2D***60 | Rear Axle | 1 |
Rear Wheels And Tires (7d6870 N/S)--13.00 X 24 Tubeless Tires
| 7D***70 | Rear Wheels And Tires | 1 |
7d6870 Rear Wheel And Tire Group
| 7D***70 | Rear Wheels And Tires | 1 |
Seat--Front View
Seat Frame, Fuel Tank And Platform (5d3590 N/S)--Top View--Part 2 Of 2
| 5D***90 | Seat Frame, Fuel Tank And Platform | 1 |
Seat Frame, Fuel Tank And Platform (5d3590 N/S)--Side View--Part 1 Of 2
| 5D***90 | Seat Frame, Fuel Tank And Platform | 1 |
Control Shafts (4b8580 N/S)
| 4B***80 | Shaft Group-Control; Control Shaft Group | 1 |
Leaning Wheel Control Shaft (2d4125 N/S)
| 2D***25 | Shaft Group-Leaning Wheel Control | 1 |
5h4024 Steering Gear Tank Group
| 5H***24 | Steering Booster Tank Group | 1 |
4d7215 Steering Gear Assembly
| 4D***15 | Steering Gear Assembly | 1 |
Tandem Drive Housing (6d2490 N/S)
| 6D***90 | Tandem Drive Housing | 1 |
Tandem Drive Housing (7d7640 N/S)
| 7D***40 | Tandem Drive Housing | 1 |
Tank And Pump (4d8215 N/S)
| 4D***15 | Tank And Pump | 1 |
Transmission (7d6210 N/S)--Lower Half--Top View--Part 2 Of 2
| 7D***10 | Transmission | 1 |
Transmission (7d6210 N/S)--Lower Half--Top View - Part 2 Of 2
| 7D***10 | Transmission | 1 |
Transmission (7d6210 N/S)--Upper Half--Side View - Part 1 Of 2
| 7D***10 | Transmission | 1 |
Transmission (7d6210 N/S)--Upper Half--Side View--Part 1 Of 2
| 7D***10 | Transmission | 1 |
Transmission Brake
Transmission Case And Covers (5d7700 N/S)-End View-Part 2 Of 2
| 5D***00 | Transmission Case And Covers | 1 |
Transmission Case And Covers (5d7700 N/S)-Side View-Part 1 Of 2
| 5D***00 | Transmission Case And Covers | 1 |
Transmission Lubrication System (6d3560 N/S)
| 6D***60 | Transmission Lubrication System | 1 |
6d3390 Oil Filter Group
| 6D***90 | Transmission Oil Filter Group | 1 |
8d1567 Joint Assembly
| 8D***67 | Universal Joint As | 1 |
8d1505 Joint Assembly
| 8D***05 | Universal Joint Group | 1 |
8d1566 Joint Assembly
| 8D***66 | Universal Joint Group | 1 |
8d1502 Joint Assembly
| 8D***02 | Universal Joint Group | 1 |
4h442 Valve Assembly
| 4H***42 | Valve Assembly | 1 |
Diesel Engine
Accessory Drive And Primary Fuel Filter (5s8056 N/S)
| 5S***56 | Accessory Drive And Primary Fuel Filter | 1 |
Air Cleaner--Dry Type - Type 1
Air Cleaner (7s6748 N/S)--Dry Type--Type 2
| 7S***48 | Air Cleaner Group | 1 |
9s4070 Alternator Assembly--24 Volt, 19 Ampere
| 9S***70 | Alternator Assembly | 1 |
2p1204 Alternator Group--24 Volt, 19 Ampere
| 2P***04 | Alternator Group | 1 |
Alternator (9s2563 N/S)--24 Volt, 19 Ampere
| 9S***63 | Alternator Group | 1 |
2p9575 Alternator Head Group
| 2P***75 | Alternator Head Assembly | 1 |
Battery And Wiring (5d3790 N/S)--24 Volt--Front View Of Dash Panel And Wiring--Part 3 Of 4
| 5D***90 | Battery And Wiring | 1 |
Battery And Wiring (5d3790 N/S)--24 Volt--Rear Portion--As Viewed From Right Hand Side Of Machine--Part 2 Of 4
| 5D***90 | Battery And Wiring | 1 |
Battery And Wiring (5d3790 N/S)-24 Volt-Part 4 Of 4
| 5D***90 | Battery And Wiring | 1 |
Battery And Wiring (5d3790 N/S)--24 Volt--Part 4 Of 4
| 5D***90 | Battery And Wiring | 1 |
Battery And Wiring (5d3790 N/S)--24 Volt--Front Portion--As Viewed From Right Hand Side Of Machine--Part 1 Of 4
| 5D***90 | Battery And Wiring | 1 |
Blower Fan And Guard
Breather And Fumes Disposal (5s6437 N/S)
| 5S***37 | Breather And Fumes Disposal | 1 |
Camshaft (5s6438 N/S)
| 5S***38 | Camshaft | 1 |
Connecting Rod And Piston (5s6429 N/S)--6 Required
| 5S***29 | Connecting Rod And Piston; Connecting Rod And Piston Group | 1 |
Crankshaft (1p1394 N/S)
| 1P***94 | Crankshaft | 1 |
Crankshaft Bearing Replacement
Crankshaft Bearing Replacement Groups
Cylinder Block And Covers (7s4098 N/S)--End View--Part 3 Of 3
| 7S***98 | Cylinder Block And Covers | 1 |
Cylinder Block And Covers (7s4098 N/S)--Side View--Part 2 Of 3
| 7S***98 | Cylinder Block And Covers | 1 |
Cylinder Block And Covers (7s4098 N/S)--Side View--Part 1 Of 3
| 7S***98 | Cylinder Block And Covers | 1 |
2p8776 Cylinder Block Assembly
| 2P***76 | Cylinder Block As | 1 |
5s6778 Cylinder Block Assembly
| 5S***78 | Cylinder Block Assembly | 1 |
Cylinder Head And Valve Mechanism (5s6444 N/S)--End View - Part 2 Of 2
| 5S***44 | Cylinder Head And Valve Mechanism | 1 |
Cylinder Head And Valve Mechanism (5s6444 N/S)--Side View - Part 1 Of 2
| 5S***44 | Cylinder Head And Valve Mechanism | 1 |
Cylinder Head And Valve Mechanism (5s6444 N/S)--End View--Part 2 Of 2
| 5S***44 | Cylinder Head And Valve Mechanism | 1 |
8d6470 Electric Hour Meter Group
| 8D***70 | Electric Hour Meter Group | 1 |
2p2501 Electric Starting Motor Group--Prestolite--24 Volt
| 2P***01 | Electric Starting Motor Group | 1 |
Fan Drive And Support (7s1248 N/S)
| 7S***48 | Fan Drive And Support | 1 |
Flywheel (5s3451 N/S)--Type 1
| 5S***51 | Flywheel Group; Flywheel Group | 1 |
Flywheel (5s3451 N/S)--Type 2
| 5S***51 | Flywheel Group; Flywheel Group | 1 |
5s9666 Fuel Filter Group
| 5S***66 | Fuel Filter Group | 1 |
Fuel Injection Valves And Lines (5s9923 N/S)
| 5S***23 | Fuel Injection Valves And Lines | 1 |
Fuel Lines
7s1251 Fuel Priming Pump Group
| 7S***51 | Fuel Priming Pump Group | 1 |
5s9076 Fuel Pump Housing Group--Type 1
| 5S***76 | Fuel Pump Housing Group | 1 |
5s9076 Fuel Pump Housing Group--Type 2
| 5S***76 | Fuel Pump Housing Group | 1 |
7s4430 Fuel Transfer Pump Group
| 7S***30 | Fuel Transfer Pump Group | 1 |
Gasket Kits
| 1P***66 | Diesel Engine Complete | 0 |
| 1P***67 | Transmission | 0 |
| 8S***57 | Water Pump | 0 |
Glow Plug And Wiring (5s8501 N/S)--24 Volt
| 5S***01 | Glow Plug Group; Glow Plug And Wiring Group | 1 |
Fuel Pump Housing And Governor (7s6740 N/S)
| 7S***40 | Governor And Fuel Injection Pump Group | 1 |
Governor Control (6d7150 N/S)--As Viewed From Right Hand Side Of Machine--Part 1 Of 2
| 6D***50 | Governor Control | 1 |
Governor Control (6d7150 N/S)--As Viewed From Right Hand Side Of Machine--Part 2 Of 2
| 6D***50 | Governor Control | 1 |
7s9333 Governor Group
| 7S***33 | Governor Group | 1 |
Governor Torque Spring (8s6099 N/S)
| 8S***99 | Governor Torque Spring | 1 |
Manifold
7s5900 Motor Assembly--24 Volt
| 7S***00 | Motor Assembly | 1 |
Muffler
2p915 Oil Filter And Lines Group
| 2P***15 | Oil Filter And Lines Group | 1 |
7s6638 Oil Filter Assembly
| 7S***38 | Oil Filter Assembly | 1 |
2p916 Oil Filter Group
| 2P***16 | Oil Filter Group | 1 |
Oil Filter, Cooler And Lines (5s7252 N/S)
| 5S***52 | Oil Filter, Cooler And Lines | 1 |
Oil Gauge, Fuel Gauge And Heat Indicator
Oil Pump (8s8918 N/S)
| 8S***18 | Oil Pump | 1 |
7s9840 Oil Pump Assembly
9h2256 Fuel Priming Pump Assembly
| 9H***56 | Pump Assembly | 1 |
5s6684 Water Pump Group
| 5S***84 | Pump Group-Water | 1 |
Radiator--Side View - Part 2 Of 2
Radiator--Rear View - Part 1 Of 2
Service Meter (9s8921 N/S)
| 9S***21 | Service Meter | 1 |
9s7976 Solenoid Assembly--24 Volt
| 9S***76 | Solenoid As | 1 |
Starting Motor (7s4090 N/S)--24 Volt--Type 2
| 7S***90 | Starting Motor Group-Electric | 1 |
2p2502 Electric Starting Motor Group--Delco-Remy--24 Volt--Part 2 Of 2
| 2P***02 | Starting Motor Group-Electric | 1 |
2p2502 Electric Starting Motor Group--Delco-Remy--24 Volt--Part 1 Of 2
| 2P***02 | Starting Motor Group-Electric | 1 |
Starting Motor (7s4090 N/S)--24 Volt--Type 1
| 7S***90 | Starting Motor Group-Electric | 1 |
3p6 Electric Starting Motor--Prestolite--24 Volt--Part 1 Of 2
| 3P***06 | Starting Motor Group-Electric; Electric Starting Motor Group-Prestolite | 1 |
Starting Motor (7s4090 N/S)--24 Volt
| 7S***90 | Starting Motor Group-Electric | 1 |
3p6 Electric Starting Motor--Prestolite--24 Volt--Part 2 Of 2
| 3P***06 | Starting Motor Group-Electric; Electric Starting Motor Group-Prestolite | 1 |
Radiator Support (6d4430 N/S)
| 6D***30 | Support Group-Radiator | 1 |
7h7290 Disconnect Switch Assembly
| 7H***90 | Switch As-Disconnect | 1 |
Water Lines (7s3704 N/S)
| 7S***04 | Water Lines | 1 |
Wiring Diagram-24 Volt System
120 serial number reference
On the vintage 120, the serial/PIN plate is a riveted metal tag on the main frame rather than a single universal spot used on later machines - look on the frame rail near the front axle pivot or under the operator's platform on the right-hand side. Read the first two or three characters as the production-block prefix (a letter-and-number combination such as 10R or 13U) and the digits that follow as the sequential unit number within that block. The engine carries its own separate serial plate on the block, which will not match the frame's prefix.
| Prefix | Identifies | Notes |
|---|---|---|
| 89G | Earliest identified production block, mid-1960s (circa 1965-1968) | Direct drive machine with oil clutch, no torque converter; six-cylinder D333A engine, roughly 115 hp at the flywheel. Operating weight in the area of 10.7 t (23,700 lb). Blade controls are hand-lever/mechanical on early units; later units in this block added a hydraulic side-shift circle for the moldboard, short of full hydraulic implement control. |
| 60H | Parallel block to 89G, same generation | Covered by the same parts book as 89G, pointing to a concurrent production run rather than a later series. One source ties this block to Canadian-built machines; treat the plant detail as unconfirmed - verify with your dealer. |
| 14K | Mid-production block, late 1960s | Follows the 89G/60H block in the production sequence, covered by its own dedicated parts catalog. The direct-drive/D333-family engine likely carries over from the earlier block, but that is not separately confirmed for this exact range - verify with your dealer. |
| 35K | Parallel block to 14K | Covered by the same parts book as 14K rather than its own standalone catalog, pointing to a concurrent variant run. The specific difference from 14K (drivetrain option or build plant) is not documented - verify with your dealer. |
| 10R | Later production block, turn of the 1970s | Equipped with the six-cylinder 3306 engine and a powershift transmission, a change from the earlier direct-drive/D333 setup. Covered by its own dedicated parts catalog distinct from the 140 grader's parts books. Parts coverage for this block is split across two catalog editions partway through the range. |
| 22R | Parallel block to 10R | Covered by the same parts book as 10R, continuing on from the 10R range. Same 3306 engine and powershift transmission as 10R. |
| 13U | Late civilian production block, early-to-mid 1970s | Documented on a 1971-built unit with the 3306 engine and a six-speed powershift transmission, plus a mid-mount scarifier and hydraulic side-shift moldboard. This block runs toward the end of the line before the 120B succeeded it. |
| 90R | Military-contract serial series | A military-procured unit stamped with this prefix is documented as the direct equivalent of a civilian 13U-block machine. Single source - verify with your dealer or the applicable military technical manual before ordering parts. |
| E92 | Late production block | Has its own dedicated operation-and-maintenance manual and service manual editions, indicating a distinct late-run block. Exact year and whether the engine/driveline carried straight over from 13U are not confirmed in available listings - verify with your dealer. |
| E94 | Late production block, follows E92 in sequence | Parts-catalog and service-manual editions exist specifically for this block, starting at the low end of its range. Likely close to the final block before the line was replaced by the 120B, but that is not independently confirmed - verify with your dealer. |
Frequently asked questions
What engine does the Caterpillar 120 motor grader have?
It depends on the production block. Early 120 graders, built with serial prefixes 89G and 60H in the mid-1960s, run a Cat D333A diesel rated roughly 115 to 121 hp through a direct-drive transmission with an oil clutch. Later production blocks (prefixes 10R, 22R, 13U, 90R, E92, and E94) moved to a powershift transmission; period sources disagree on whether these later blocks kept the D333 or switched to a 3306, so that detail varies by source and isn't settled.
What does the Caterpillar 120 motor grader weigh?
The earliest 89G-block 120 graders operated at roughly 10.7 t (23,700 lb). That figure applies to the early direct-drive machines specifically; no operating weight has been documented for the later powershift-equipped blocks, so don't assume the same figure carries across the full production run.
What replaced the Caterpillar 120 motor grader?
Caterpillar replaced this vintage 120 with the 120B around 1972, which later continued as the 120G, 120H, and 120K.
What 120 owners discuss
Why does the clutch on a direct-drive 120 start slipping under a heavy load, like plowing a deep snow drift?
The direct-drive 120 uses an oil-cooled multi-disc clutch fed by a tapped section of the engine's own oil pump for cooling and lubrication, not a separate hydraulic clutch system. Over time the release levers wear and close up the working clearance between the throw-out bearing face and the lever ends. Owners report the first symptom is slip specifically under high load in a low gear, sometimes with oil showing up inside the bell housing. Correct clearance runs around 4.8 mm (3/16 in) measured at each release lever. The fix is adjusting the castellated nut on each lever link evenly, working around the full circle at least twice so wear settles out evenly rather than favoring one lever. Because this sits in the main drivetrain and affects controlled starts and stops under load, have a qualified mechanic verify clearance and function before returning the machine to regular work.
The 120 I'm looking at is advertised as hydraulic control. Is that normal for this era?
Not as a base machine. A 120 from this production run is fundamentally a lever/stick-shift unit, sometimes called a 'knuckle-buster' by owners, for both gear selection and blade movement, not a full hydraulic-control grader. Some units did pick up a hydraulic sideshift add-on for the moldboard, which can lead a seller to describe the whole machine as hydraulic when the core controls are still mechanical linkage. For light, part-time grading work owners consider the stick-shift setup just as capable as a later powershift-hydraulic machine, so mechanical controls are not themselves a defect. Just confirm exactly what's equipped, mechanical linkage versus any hydraulic assist, before you factor it into price.
My engine has a loose, knocking feel that seems to be coming from the crank end play. Can the thrust bearing on this engine family still be serviced?
Yes, but expect a workaround rather than a straight parts swap. The original flanged crankshaft thrust bearing for this engine is no longer produced in its factory form, and oversize/undersize replacement options are limited compared to what a well-worn crank may need. A common owner solution is converting to a pair of flat thrust washers, which requires machining a shallow locating recess into the bearing cap and re-establishing correct end play, roughly 0.28 to 0.46 mm (0.011 to 0.018 in). This is crankshaft-level machine shop work, not a bolt-in repair. Have a qualified mechanic or machinist verify end play and washer retention before the engine goes back into service.
The engine in my grader doesn't quite match the bore and spec figures I've seen published for a 'D333.' Is my machine wrong, or misidentified?
Not necessarily wrong. The engine family fitted across this grader's production run isn't a single fixed spec. Earlier blocks run a smaller bore, while a later larger-bore variant of the same basic engine carries a different bore and stroke and effectively became the basis for the successor engine that replaced it as Cat transitioned the design. Depending on exactly which block and casting landed in a given machine, bore size, water pump drive, and valve cover style can all differ. Cross-check your engine against the serial number and casting details on your own unit rather than assuming one published spec sheet applies across the board. It's genuinely normal for sources on this vintage to disagree depending on which block they're describing.
The brakes feel weak or grabby on my 120. Does that mean parts are worn out and need replacing?
Not always. Owners of graders this age consistently report that a machine with a history of light or deferred maintenance often just has brake anchors and adjusters out of adjustment rather than genuinely worn or failed components. Before condemning the brake system and sourcing parts, check and reset the anchor and adjuster settings first, that alone resolves a lot of reported brake complaints on machines of this vintage. Because braking on a machine this size and weight is safety-critical, have a qualified mechanic verify adjustment and actually test stopping performance under load before you put the machine back into regular service.
What's different about the electrical system on a 24-volt machine of this vintage compared to a modern one?
These graders charge through a generator and separate mechanical voltage regulator setup, not an alternator with solid-state regulation. The regulator typically works in stages, a cutout section that disconnects the generator from the battery when engine speed is too low to charge, plus current and voltage limiting sections. After a battery disconnect, a rebuild, or long storage, the regulator commonly needs to be re-polarized, a brief momentary jumper between the regulator's BAT and ARM terminals, before the generator will resume charging correctly. Factory wiring documentation for these circuits is thin, so tracing a fault usually means following the physical harness rather than a clear factory diagram. Have a qualified mechanic verify polarity and charging output before relying on the system in the field.
What should I check before buying a used vintage 120 grader?
Confirm the actual control setup against what's advertised, this era is base mechanical stick-shift, with any hydraulic feature being an add-on rather than standard. Start the engine cold if possible and confirm it holds oil pressure and doesn't smoke excessively at idle and under load. Load the drivetrain briefly to check the clutch doesn't slip. Inspect the circle and drawbar wear strips for looseness or play, hard metal-to-metal contact there is the classic sign of a machine that sat without regular lubrication. Check tires for sidewall cracking and dry rot rather than just tread depth, since a machine this old is often still riding on older-style casings. Pull the serial number and match the prefix against known production-year ranges rather than trusting an advertised year at face value, published specs for this exact vintage vary by source and by which engine block the machine actually carries. Budget for a brake adjustment and address any clutch slip early. Have a qualified mechanic do a full inspection before you commit to a purchase.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
Serial-range & configuration variants
This page covers the Caterpillar 120. Related factory variants of the same model family:
120
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