Komatsu DRT037_1B_E(S/N 3001-UP (D37E/A-5))
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu DRT037_1B_E covers the D37E-5/D37P-5 crawler dozer built on the S/N 3001-UP production block, a compact class-7-tonne machine powered by the Komatsu 6D95L-1, a naturally aspirated, water-cooled 6-cylinder diesel with mechanical (jerk-pump) fuel injection and no electronic engine controls. Operating weight runs roughly 6.8 to 7.5 tonnes (15,000 to 16,500 lb), varying by configuration. Komatsu offered this generation in several track and blade setups: the E standard-gauge version with a 330 mm (13 in) shoe, the P wide-track swamp version with a 600 mm (23.6 in) shoe, and a PG extra-wide low-ground-pressure variant, all fed by a straight or 6-way blade depending on job spec. This generation followed the earlier D37E-2 series and ran into the early-to-mid 2000s before Komatsu replaced it with the electronically controlled D37EX-21 (KOMSTAT II) line.
Across the E and P/PG badges built on this same 3001-UP serial block, the core driveline stayed constant: a mechanical power-shift transmission, wet multi-disc steering clutches and brakes worked through mono-lever steering, and spur-gear single-reduction final drives. What changed between the trims was track gauge, shoe width, and ground pressure to suit the working surface, not the powertrain. Because it predates any onboard diagnostics or electronic fuel control, this machine is valued today as a simple, low-cost small dozer for grading, trail work, and light land-clearing jobs where an owner-operator can maintain and repair it with basic mechanic's tools. Its parts market is active mainly around undercarriage wear items, steering clutch disc packs, and final drive components, and it shares service literature with sibling small dozers from the same era, which keeps parts and know-how easier to find than the model number alone suggests.
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.
Komatsu DRT037_1B_E(S/N 3001-UP (D37E/A-5)) specifications
Engine
| Engine model | Komatsu 6D95L-1, water-cooled direct-injection diesel, naturally aspirated |
| Cylinders | 6 cylinders |
| Displacement | approx. 4.9 L (4,900 cc) |
| Power | approx. 56-60 kW (75-81 HP) — figures vary by source and configuration |
| Controls | Fully mechanical fuel system and governor; no ECM or electronic engine controls on this serial range |
Weights
| Tractor weight, bare (D37E-5) | 5,675 kg (12,555 lb) — includes lubricant, coolant, full fuel, operator, standard equipment, no dozer |
| Tractor weight, bare (D37P-5) | 6,240 kg (13,805 lb) — same basis, no dozer |
| Operating weight, with PAT dozer (D37E-5) | 6,855 kg (15,080 lb) — includes power-angle-tilt dozer, ROPS, full fluids, operator |
| Operating weight, with PAT dozer (D37P-5) | 7,477 kg (16,450 lb) — same basis |
| ROPS cab, added weight | +470 kg (1,030 lb) |
| ROPS canopy, added weight | +230 kg (505 lb) |
| Optional multi-shank ripper, added weight | +440 kg (970 lb), to bare tractor |
Dimensions
| Overall length with dozer (D37E-5) | 3,950 mm (13'0") |
| Overall length with dozer (D37P-5) | 3,940 mm (12'11") |
| Length, bare tractor (D37E-5) | 3,545 mm (11'8") |
| Length, bare tractor (D37P-5) | 3,520 mm (11'7") |
| Height to top of ROPS | 2,695 mm (8'10"), same for both configurations |
| Ground clearance (D37E-5) | 315 mm (1'0") |
| Ground clearance (D37P-5) | 360 mm (1'2") |
| Track gauge (D37E-5) | 1,450 mm (4'9") |
| Track gauge (D37P-5) | 1,650 mm (5'5") |
| Track length on ground | 2,185 mm (7'2"), same for both configurations |
| Standard shoe width (D37E-5) | 330 mm (13.0 in), single-grouser shoe |
| Standard shoe width (D37P-5) | 600 mm (23.6 in), circular-arc shoe |
| Optional shoe, D37E-5 | 400 mm (15.8 in) single-grouser, adds 90 kg (198 lb), reduces ground pressure by about 0.06 kg/cm2 (0.85 psi) |
| Optional shoe, D37P-5 | 600 mm (23.6 in) circular-arc shoe, adds 15 kg (33 lb) and 20 mm (1 in) height, ground pressure unchanged |
| Grouser height | 47 mm (1.9 in), both configurations |
| Undercarriage roller/shoe counts | 41 track shoes, 6 track rollers, 1 carrier roller per side, both configurations |
Performance
| Transmission | Komatsu Hydroshift power-shift transmission, planetary-gear, hydraulically controlled, force-lubricated; 3 forward / 3 reverse, single-lever joystick control |
| Travel speed & rated drawbar pull, 1st gear (D37E-5) | Forward 2.3 km/h (1.4 mph), reverse 2.5 km/h (1.6 mph); rated drawbar pull 8,020 kg (17,680 lb) |
| Travel speed & rated drawbar pull, 2nd gear (D37E-5) | Forward 4.1 km/h (2.5 mph), reverse 4.5 km/h (2.8 mph); rated drawbar pull 4,300 kg (9,470 lb) |
| Travel speed & rated drawbar pull, 3rd gear (D37E-5) | Forward 6.9 km/h (4.3 mph), reverse 7.5 km/h (4.7 mph); rated drawbar pull 2,340 kg (5,150 lb) |
| Max drawbar pull (D37E-5) | 9,500 kg (20,940 lb) |
| Travel speed & rated drawbar pull, 1st gear (D37P-5) | Forward 2.3 km/h (1.4 mph), reverse 2.5 km/h (1.6 mph); rated drawbar pull 7,980 kg (17,590 lb) |
| Travel speed & rated drawbar pull, 2nd gear (D37P-5) | Forward 4.1 km/h (2.5 mph), reverse 4.5 km/h (2.8 mph); rated drawbar pull 4,260 kg (9,390 lb) |
| Travel speed & rated drawbar pull, 3rd gear (D37P-5) | Forward 6.9 km/h (4.3 mph), reverse 7.5 km/h (4.7 mph); rated drawbar pull 2,290 kg (5,070 lb) |
| Max drawbar pull (D37P-5) | 9,450 kg (20,830 lb) |
| Ground pressure, standard shoe (D37E-5, tractor basis) | 0.39 kg/cm2 (5.6 psi) |
| Ground pressure, standard shoe (D37P-5, tractor basis) | 0.24 kg/cm2 (3.4 psi) |
| Steering | Single steering lever, wet multiple-disc steering clutches, interconnected wet contracting-band brakes; inching pedal for precise low-speed control |
| Hydraulic pump flow | 95.5 L/min (25.2 US gal/min) at rated engine rpm, gear-type pump |
| Hydraulic relief valve setting | 175 kg/cm2 (2,490 psi) |
Blades
| Blade type offered | Power-Angle-Tilt (PAT) dozer blade; lift, angle, and tilt controlled by a single right-hand joystick |
| Blade capacity, D37E-5 (SAE / heaped) | 1.49 m3 (1.95 yd3) SAE struck; 2.13 m3 (2.79 yd3) heaped |
| Blade dimensions, D37E-5 (length x height) | 2,415 x 940 mm (7'11" x 3'1") |
| Blade lift/drop/tilt, D37E-5 | Max lift above ground 865 mm (2'10"); max drop below ground 370 mm (1'3"); max tilt adjustment 350 mm (1'2") |
| Blade added weight, D37E-5 | Blade 860 kg (1,900 lb) plus hydraulic control unit 180 kg (400 lb); adds 0.07 kg/cm2 (1.00 psi) ground pressure |
| Blade capacity, D37P-5 (SAE / heaped) | 1.62 m3 (2.11 yd3) SAE struck; 2.30 m3 (3.00 yd3) heaped |
| Blade dimensions, D37P-5 (length x height) | 2,875 x 895 mm (9'5" x 2'11") |
| Blade lift/drop/tilt, D37P-5 | Max lift above ground 915 mm (3'0"); max drop below ground 320 mm (1'1"); max tilt adjustment 420 mm (1'5") |
| Blade added weight, D37P-5 | Blade 900 kg (1,980 lb) plus hydraulic control unit 180 kg (400 lb); adds 0.04 kg/cm2 (0.57 psi) ground pressure |
| Blade hydraulic cylinders | Double-acting piston type: 2x blade lift and 2x blade angling cylinders, 90 mm bore; 1x blade tilt cylinder, 90 mm bore |
| Optional multi-shank ripper | 3 shanks standard (up to 5 attachable); max lift above ground 440 mm (1'5"); max digging depth 310 mm (1'0"); digging angle 50 degrees at 1 ft depth; beam length 1,529 mm (5'0") |
Service Capacities
| Fuel tank | 115 L (30.4 US gal) |
| Cooling system | 22 L (5.8 US gal) |
| Engine oil | 12 L (3.2 US gal) |
| Transmission (Hydroshift) / power train case | approx. 17 L (4.5 US gal) combined power train case; exact split between transmission and bevel gear/steering-clutch compartments not confirmed for this range |
| Final drive, each side — 1,450 mm track gauge (D37E-5) | approx. 12.1 L (3.2 US gal) |
| Final drive, each side — 1,650 mm track gauge (D37P-5) | approx. 12.1 L (3.2 US gal) |
| Fluid specification note | Refill with Komatsu-spec engine oil (EO), transmission/powertrain oil (TO), axle/final-drive oil (AXO), and hydraulic oil (HO) per the factory service chart; confirm exact grade by ambient temperature with your dealer |
Model Notes
| Model designation and identity | Factory documentation for this serial range covers the Komatsu D37E-5 and the wide-track D37P-5A, S/N 3001-UP, both built around the mechanical 6D95L-1 diesel, Hydroshift power-shift transmission, and multiple-disc steering clutches. A later running change (roughly S/N 3661-3731-UP, outside this serial block) carries the same model names forward with the S4D102E-1J engine; specifications quoting that engine belong to the later serial range and do not apply here. |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
DRT037_1B_E(S/N 3001-UP (D37E/A-5)) fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) | approx. 12.0-12.1 L (3.2 US gal) | Komatsu Genuine diesel engine oil, API CD/CE-equivalent classification for this era of naturally aspirated diesel. SAE viscosity grade is selected from the OMM's ambient-temperature chart (older D-series small dozers typically span SAE 10W through 15W-40 across the working range); confirm the exact grade breakpoints against the chart for this serial range with your dealer. |
| Cooling system | approx. 22.0-22.3 L (5.9 US gal) | Komatsu Genuine Supercoolant AF-NAC, a permanent-type ethylene-glycol, corrosion-inhibited antifreeze/coolant. Mix ratio set for the expected minimum ambient temperature. |
| Fuel tank | approx. 115.0-115.1 L (30.4 US gal) | Diesel fuel meeting the specification for the 6D95L-series naturally aspirated diesel fitted to this machine. |
| Transmission/powertrain (power train case - shared powershift transmission plus bevel gear/steering-clutch compartment, as split in the OMM) | approx. 17.0 L (4.5 US gal) for the shared power train case, per factory spec sheets; exact split (if any) between the transmission case and the bevel gear/steering compartment sections of the OMM chart is not confirmed from available sources - verify against the OMM's own table. | Komatsu Genuine powertrain/gear oil, viscosity graded by ambient temperature per the OMM chart. |
| Final drive (each side) | approx. 12.1 L (3.2 US gal) as reported on factory-derived spec sheets; not confirmed whether this figure is per side or the combined total for both final drive cases - verify with the OMM or dealer before servicing. | Komatsu Genuine gear oil, API GL-4/GL-5-equivalent classification. |
| Hydraulic system/tank | not documented in available sources for this exact serial range (S/N 3001-UP). The work-equipment circuit uses a gear-type pump with a relief-valve setting near 17200 kPa (2494 psi). Verify tank capacity directly against the OMM or with your dealer. | Komatsu Genuine hydraulic oil, anti-wear type. |
| Pivot shaft/equalizer bar | not listed as a distinct oil-fill point in available sources; on this small-dozer chassis the equalizer/pivot shaft is normally serviced through grease fittings rather than a separate oil reservoir. | Komatsu Genuine multipurpose grease at the scheduled grease-fitting interval (see grease row). |
| Grease (chassis pins, bushings, blade linkage, idler) | applied per fitting per the lubrication chart, not a bulk-fill capacity | Komatsu Genuine multipurpose grease, NLGI 2 lithium-based grease for general chassis points. |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Komatsu DRT037_1B_E(S/N 3001-UP (D37E/A-5)) maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 50 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
| Every 4,000 h |
|
Servicing the DRT037_1B_E(S/N 3001-UP (D37E/A-5)) beyond the schedule
Predictive Maintenance & Fluid Analysis
With no ECM or fault-code system on the 6D95L-1, oil sampling is the main early-warning tool. Pull engine oil, power train case oil, and final drive case oil samples on a fixed interval to catch steering clutch disc wear, fuel dilution from a worn mechanical injection pump, and gear-metal trends in the final drives before they show up as noise or slip. Test coolant SCA concentration at every 500-1000h check since this generation has no automated coolant monitoring, and watch fuel filters closely for water intrusion given the mechanical injection system's sensitivity to contamination.
Corrective & Common Repairs
Expect recurring work on the wet multi-disc steering clutch and brake linkage; owners commonly report gradual pedal travel increase and steering lag that traces back to disc wear or linkage adjustment, not the clutch packs themselves. Spur-gear final drives on both sides are the other common wear point on machines running wide P/PG tracks in soft or abrasive ground. Radiator fin cleaning and fan belt replacement are frequent shop visits given the naturally aspirated engine's reliance on clean airflow with no turbo to compensate for a dirty core.
Overhaul & Rebuild Points
Major rebuild decisions on the 6D95L-1 center on the mechanical injection pump and top end once compression or fuel delivery drift outside spec, typically well beyond the 2000h mark. Steering clutch and brake disc packs are a scheduled rebuild item, not a run-to-failure part, given how directly they affect steering control. Final drive gear sets and bearings should be opened and inspected at major overhaul intervals, and undercarriage wear-limit checks across rollers, idlers, sprockets, and chain drive the call on partial versus full undercarriage rebuild.
Seasonal & Environment Servicing
This is a naturally aspirated mechanical diesel with no electronic cold-start assist, so cold-weather starting depends on correct seasonal fuel blend, battery condition, and a block heater in freezing climates. In hot or dusty environments, air cleaner service intervals should be shortened and radiator fins checked more often since there is no turbo margin to fall back on if airflow drops. For P/PG wide-track configurations working wet or swampy ground, undercarriage sealed-and-lubricated track link inspection should move up in frequency to catch seal wear before it lets in abrasive material.
DRT037_1B_E(S/N 3001-UP (D37E/A-5)) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 113-60-43321 | Cartridge,Hydraulic Oil Filter (D31s) | Hydraulic service | Check fitment → |
| 07002-03334 | O-Ring, At Transmission Filter | Scheduled service item | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
DRT037_1B_E(S/N 3001-UP (D37E/A-5)) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| Coolant Temperature Caution Lamp | Engine coolant temperature has risen above the normal operating range | Low coolant level, clogged or damaged radiator core, loose or broken fan belt, faulty thermostat | Stop the machine, idle down, check coolant level and radiator core for blockage, check fan belt tension before resuming work |
| Engine Oil Pressure Caution Lamp | Engine lubrication oil pressure has dropped below the safe minimum | Low engine oil level, clogged oil filter, worn oil pump, oil pressure sender or wiring fault | Stop the engine immediately, check oil level and filter condition before restarting |
| Charge (Alternator) Lamp | Charging circuit is not supplying current to the battery | Broken or slipping fan/alternator belt, faulty alternator, loose or corroded wiring connection | Check belt tension and condition first, then test alternator output and battery connections |
| Torque Converter / Power Train Oil Temperature Caution Lamp | Torque converter or transmission oil temperature has exceeded the normal range | Low power train oil level, clogged oil cooler, sustained high-load operation (steep grade, heavy push load) | Reduce load and let the machine idle to cool, then check power train oil level and cooler for restriction |
| Air Cleaner Restriction Indicator | Air filter element is clogged, restricting intake airflow to the engine | Dust and debris buildup on the filter element from dusty jobsite conditions | Inspect and clean or replace the air cleaner element |
| Fuel Level / Fuel Filter Caution Lamp | Fuel level low or water/sediment buildup detected in the fuel filter/water separator | Fuel running low, water contamination in fuel, clogged fuel filter element | Refuel as needed, drain water separator, replace fuel filter element if restricted |
| Preheat (Glow) Indicator Lamp | Intake air preheating device is active to assist cold starting | Normal cold-weather starting sequence, not a fault condition on its own | Wait for the lamp to go out before cranking the starter in cold conditions |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
DRT037_1B_E(S/N 3001-UP (D37E/A-5)) attachments & work tools
Blades
This D37E/D37P-5 class small dozer runs a straight dozing blade as the base configuration, with an angling blade and a hydraulic 6-way (power-angle-tilt) blade offered as alternates on the same frame width, matching the roughly 1.45 m track gauge. Published blade capacity for this exact model varies sharply by source (roughly 1.4-1.9 cu m is typical for a machine in the 5.4-7.5 t operating-weight class) - treat blade width/capacity as a source-dependent range and confirm against the build-specific spec sheet.
Rippers
Both single-shank parallelogram and multi-shank (typically 3-shank, 2-cylinder parallelogram) rear rippers are offered for this D37-class frame, sharing mounting and beam-pocket design with sibling small-dozer models. Exact factory shank count, beam length, and ripper weight are not separately published for this specific serial range (3001-up); the closest documented reference point is the current-generation successor's 3-shank multi-shank ripper at roughly 470 kg (1,036 lb), useful only as a rough class benchmark, not a confirmed spec for this -5 unit.
Winches
No factory winch model is documented for this exact D37E-5 serial range in available literature. Dozers in this weight class used in forestry/logging service commonly carry a rear PTO- or engine-driven cable winch in roughly the 6-9 t line-pull class, mounted in place of or alongside the rear ripper. One used-equipment listing cites a far larger winch rating on an individual unit; that reads as a field retrofit or listing error rather than a factory option and should not be treated as a catalog spec.
Drawbars/counterweights
Maximum drawbar pull is documented at roughly 9,500 kg (20,940 lb) for the E-transmission variant; the P-transmission sibling lists staged pull by gear at roughly 7,980 kg (17,590 lb) in 1st, 4,260 kg (9,390 lb) in 2nd, and 2,300 kg (5,070 lb) in 3rd. Rear ballast/counterweight is typically added when a rear ripper or winch is fitted to offset tool weight and hold front blade float, but no OEM counterweight kit mass is published for this specific serial range - verify against the dealer parts book for this build.
Cab/ROPS guarding
The standard operator station is a ROPS/FOPS-rated cab, meeting the equivalent SAE/ISO rollover and falling-object protection criteria for this dozer class. Forestry and waste-handling configurations on machines this size typically add screened window guards, a belly/skid plate, and a rear grille or radiator screen as a dealer or aftermarket protection package; no factory-published forestry guard package specific to this -5 serial range was found.
Hydraulic arrangement
The work-equipment circuit runs off a gear-type hydraulic pump with relief pressure set at roughly 17.2 MPa (2,495 psi), consistent across independent spec listings for this model. Blade functions (raise/lower, plus angle/tilt if a PAT or 6-way blade is fitted) run off a multi-spool control valve; a rear ripper or winch, when fitted, is normally plumbed as an added spool/circuit off the same pump rather than a separate power source. Exact spool count and valve bank layout are not broken out in available sources for this specific serial range.
All DRT037_1B_E(S/N 3001-UP (D37E/A-5)) assemblies by section
Every catalogued assembly group for the Komatsu DRT037_1B_E(S/N 3001-UP (D37E/A-5)). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Guard
Komatsu : Drt037_1b_e(S/N 3001-Up (D37e/A-5)) : Guard : Rear Cover And Hydraulic Tank (For Ripper)
| 01***25 | Bolt,Without Revolution Sensor | 3 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 20 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
Komatsu : Drt037_1b_e(S/N 3001-Up (D37e/A-5)) : Guard : Rear Cover And Hydraulic Tank (For Ripper) (Noise Suppression For Ec)(#3001-3481)
| 01***25 | Bolt,Without Revolution Sensor | 3 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 20 |
| 01***40 | Bolt,R.H. Outside And L.H. Inside, Bolt | 4 |
Komatsu : Drt037_1b_e(S/N 3001-Up (D37e/A-5)) : Guard : Rear Cover And Hydraulic Tank (For Ripper) (Regulation Of Eu Dynamic Noise)(#3482-)
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***25 | Bolt,Without Revolution Sensor | 3 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 20 |
Komatsu : Drt037_1b_e(S/N 3001-Up (D37e/A-5)) : Guard : Rear Cover And Hydraulic Tank (With Rops Cab) (For Ripper)
| 01***25 | Bolt,Without Revolution Sensor | 3 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 20 |
| 01***40 | Bolt,R.H. Outside And L.H. Inside, Bolt | 4 |
Hydraulic System
Komatsu : Drt037_1b_e(S/N 3001-Up (D37e/A-5)) : Hydraulic System : Hydraulic Piping (Ripper Cylinder Line) (Chassis Side)
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 3 |
| 01***09 | Nut,(With Body Positioner) | 4 |
| 01***25 | Washer,Spring?For Additional Rear Lam | 1 |
Komatsu : Drt037_1b_e(S/N 3001-Up (D37e/A-5)) : Hydraulic System : Hydraulic Piping (Tank To Pump To Valve) (For Ripper)(#3001-3730)
| 01***40 | Bolt,(With Air Conditioner) | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
Komatsu : Drt037_1b_e(S/N 3001-Up (D37e/A-5)) : Hydraulic System : Hydraulic Tank And Filter (For Ripper)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 6 |
| 01***35 | Bolt,(F4320-52a0 -5 ) | 5 |
| 01***16 | Bolt - Starting Motor Ground Cable | 2 |
Operator'S Compartment And Control System
Komatsu : Drt037_1b_e(S/N 3001-Up (D37e/A-5)) : Operator'S Compartment And Control System : Work Equipment Control Lever (1/2) (For Ripper)
| 01***16 | Bolt - Seat And Tether Belt Mounting | 4 |
| 01***25 | Bolt,(Rear Attachment Less) | 1 |
| 01***30 | Bolt - M8 X 30lg | 3 |
Komatsu : Drt037_1b_e(S/N 3001-Up (D37e/A-5)) : Operator'S Compartment And Control System : Work Equipment Control Lever (2/2) (For Ripper)
| 01***25 | Bolt,(Rear Attachment Less) | 6 |
| 01***05 | Nut,L.H. (For Trimming Dozer) | 1 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 1 |
Service Kit And Component Parts
Komatsu : Drt037_1b_e(S/N 3001-Up (D37e/A-5)) : Service Kit And Component Parts : Control Valve (4-Spool) (1/3) (For Ripper)(#3001-3730)
| 01***20 | Bolt (Itl) | 4 |
| 01***25 | Bolt, Seal Cover Mounting | 4 |
| 01***30 | Bolt (Itl) | 2 |
Komatsu : Drt037_1b_e(S/N 3001-Up (D37e/A-5)) : Service Kit And Component Parts : Control Valve (4-Spool) (1/3) (For Ripper)(#3731-)
| 01***12 | Bolt | 4 |
| 01***25 | Screw | 4 |
| 01***30 | Bolt | 2 |
Komatsu : Drt037_1b_e(S/N 3001-Up (D37e/A-5)) : Service Kit And Component Parts : Control Valve (4-Spool) (2/3) (For Ripper)(#3001-3730)
| 01***20 | Bolt (Itl) | 2 |
| 01***30 | Bolt | 6 |
| 07***30 | Ring, Seal - Between Sections | 2 |
Komatsu : Drt037_1b_e(S/N 3001-Up (D37e/A-5)) : Service Kit And Component Parts : Control Valve (4-Spool) (2/3) (For Ripper)(#3731-)
| 01***12 | Bolt | 2 |
| 01***30 | Screw | 6 |
| 07***38 | O-Ring, (Without Emergency Steering) | 2 |
Komatsu : Drt037_1b_e(S/N 3001-Up (D37e/A-5)) : Service Kit And Component Parts : Control Valve (4-Spool) (3/3) (For Ripper)(#3001-3730)
| 07***34 | O-Ring, O-Ring, Oil Level And Fill Plug | 3 |
| 07***34 | O-Ring, At Transmission Filter | 1 |
| 07***34 | O-Ring,(F2310-59a0 -4 ) | 1 |
Komatsu : Drt037_1b_e(S/N 3001-Up (D37e/A-5)) : Service Kit And Component Parts : Control Valve (4-Spool) (3/3) (For Ripper)(#3731-)
| 07***34 | O-Ring, O-Ring, Oil Level And Fill Plug | 2 |
| 07***34 | O-Ring, At Transmission Filter | 1 |
| 07***34 | O-Ring,(F2310-59a0 -4 ) | 1 |
Komatsu : Drt037_1b_e(S/N 3001-Up (D37e/A-5)) : Service Kit And Component Parts : Ripper Cylinder
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***24 | Nut,Bearing | 1 |
| 01***32 | Washer,(With Auto Emergency Steering) | 1 |
Work Equipment
Komatsu : Drt037_1b_e(S/N 3001-Up (D37e/A-5)) : Work Equipment : Hydraulic Piping (Ripper Cylinder Line)
| 07***06 | Hose,(D21s) (Tbg Spec.) | 2 |
| 07***15 | Nut,(For Shipping And Storage) | 2 |
| 07***12 | Plug,(For Shipping And Storage) | 2 |
Komatsu : Drt037_1b_e(S/N 3001-Up (D37e/A-5)) : Work Equipment : Ripper
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 4 |
DRT037_1B_E(S/N 3001-UP (D37E/A-5)) serial number reference
The PIN/machine serial plate on this D37 generation sits at the front, lower right of the operator's seat inside the cab; a separate engine serial plate is on the upper front of the engine, left side. Read the digits after the model code (e.g. D37A-5 SN 3001) as the running production number. Within the 3001-UP starting point, the model suffix (E, A, P-5A, PG-5A) distinguishes narrow-track, wide-track, and extra-wide swamp-track configurations, and later running-change serial breaks (around 3661 for P-5A, 3731 for E/A-5) mark a mid-life engine swap to the S4D102E-1 series — always match the exact serial number against the shop manual's applicability table before ordering parts.
| Prefix | Identifies | Notes |
|---|---|---|
| D37E-5 | Standard/narrow-track dozer configuration | S/N 3001-UP, this block runs through roughly S/N 3730. Steering clutch-and-brake power train (mechanical, not hydrostatic). Engine 6D95L-1 series, direct-injection water-cooled diesel. A later running change swaps to the S4D102E-1 series engine at S/N 3731-UP, outside this starting block. |
| D37A-5 | Standard/narrow-track dozer configuration, same chassis generation as D37E-5 | S/N 3001-UP. Same 6D95L-1 series engine and steering clutch-and-brake power train as D37E-5. Exact regional/market split between the A and E model codes is not clearly documented in available factory literature — confirm exact coverage with your dealer. |
| D37P-5A | Wide-track (swamp/LGP) configuration, lower ground pressure than the standard-track A/E version | S/N 3001 through roughly S/N 3660. Engine 6D95L-1 series. A running change at S/N 3661-UP swaps to the S4D102E-1 series engine, outside this starting block. |
| D37PG-5A | Extra-wide swamp/grouser variant of the P-5A wide-track dozer | S/N 3001-UP per factory parts-catalog listing, engine 6D95L series for this block. Thinly documented online — confirm configuration and coverage with dealer. |
Frequently asked questions
What engine does the Komatsu DRT037_1B_E (S/N 3001-UP, D37E/A-5) use?
A Komatsu 6D95L-1, a naturally aspirated 6-cylinder diesel with mechanical fuel injection and no electronic engine controls. A separate, later Specalog exists for a different D37E-5 serial range using an S4D102E-1 engine, but that does not apply to this S/N 3001-UP block.
What is the operating weight of this dozer?
Approximately 6.8 to 7.5 tonnes (15,000 to 16,500 lb), depending on configuration; the standard-gauge E trim sits at the lighter end and the wide-track P/PG trims run heavier.
What replaced the D37E-5 and D37P-5 in the Komatsu lineup?
The Komatsu D37EX-21 (KOMSTAT II generation), which moved this small-dozer class to electronic engine and transmission controls.
What DRT037_1B_E(S/N 3001-UP (D37E/A-5)) owners discuss
What's the most common steering complaint owners report on this dozer?
How do owners typically adjust the steering brakes, and is there a spec worth knowing?
What engine quirks show up on this generation's 6D95L-1?
What powertrain/hydraulic behavior should owners expect if the machine won't move or shifts hard?
Are there known electrical or cold-starting issues on this model?
What undercarriage or final-drive wear patterns are typical for this size of dozer?
What should a buyer check before purchasing a used one of these dozers?
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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