Komatsu SL4D130-1B(S/N 24224-UP)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu SL4D130-1B (S/N 24224-up) is a turbocharged, water-cooled, in-line four-cylinder diesel engine from Komatsu's 4D130 family, not a complete machine. It displaces about 8.5 liters (518 cu in) and is documented at roughly 88 kW (118 hp) at 1900 rpm in at least one factory application, though turbocharged and naturally aspirated variants across the wider 4D130/S4D130/SL4D130 lineup range from around 82 to 135 hp depending on series and tune. Fuel delivery is mechanical, a jerk-type inline injection pump with a mechanical governor; there is no electronic engine control. Komatsu built engines from this family through the late 1970s and 1980s and fitted them across several contemporary machines, including its D53-series medium crawler dozers (D53A-16, D53P-16, D53S-16/-17), the D57S-1 crawler dozer, and GD500-series motor graders; parts cross-reference listings group the SL4D130-1B alongside neighboring 4D130-1C/-1D/-1F and SL4D130-1C blocks rather than tying it to one single machine. Within the engine's own numbering, the SL4D130-1B follows the early S4D130-1A build (through S/N 21530) and the 4D130-1C/-1D/-1E/-1F cluster opening at S/N 10544, and is itself immediately succeeded by the SL4D130-1C starting at S/N 24260-up.
Across the 4D130 family's production run, Komatsu moved from naturally aspirated base blocks to turbocharged S- and SL-prefixed arrangements that pulled more power from the same basic casting, tracking changes through letter suffixes and serial breaks rather than full model-name changes. As Komatsu's later dozer and grader generations in this weight class adopted newer, eventually electronically governed engine families to meet tightening emissions rules, this mechanically governed line was phased out of new-machine production. In today's used and parts market the SL4D130-1B survives mainly as a rebuildable core and parts donor for older D53-series dozers and GD500-family graders still in service: because externally similar 4D130 castings carry different internal specs across the -1A through -1H letter suffixes, the serial-range designation itself, not the general 4D130 casting number, is the key identifier buyers and rebuild shops use to source the correct pistons, liners, injection components, and turbocharger hardware.
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 SL4D130-1B(S/N 24224-UP) specifications
Engine
| Engine model | SL4D130-1B, a running production build within the SL4D130-1 series at this serial break; superseded by the SL4D130-1C build at a later serial number |
| Gross power | 88 kW (118 hp) at 1900 rpm |
| Rated speed | 1900 rpm at rated power |
| Displacement | 8.5 L (518 cu in) |
| Cylinders / aspiration | 4-cylinder inline diesel, turbocharged |
| Emissions tier | Pre-emissions-tier mechanical diesel; predates EPA/CARB nonroad tier standards |
| Family note | A lower-output naturally-aspirated/turbo 4D130-1 series sibling (about 82 kW / 110 hp) powers other configurations on the same base engine platform; this build is the higher-output SL-line turbocharged version |
Weights
| Operating weight | Not a property of the engine alone -- depends on the host machine. Documented Komatsu applications for this engine family range from about 12-14 t (26,000-31,000 lb) for contemporary medium crawler dozers up to about 14.6-15.3 t (32,000-33,700 lb) for larger dozer models, with motor graders in a broadly similar class. Confirm the exact host machine and its weight with your dealer. |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
SL4D130-1B(S/N 24224-UP) fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with oil filter) | Not documented for this exact serial range — verify with your dealer or the applicable OMM | Komatsu Genuine diesel engine oil (EO series). Grade by ambient temperature: SAE 10W in cold climates, SAE 10W-30 or 15W-40 multigrade across a wide temperature band, SAE 30 in hot climates. Use an API CD-equivalent or higher diesel engine oil where genuine EO is unavailable. |
| Cooling system | Not documented for this exact serial range — verify with your dealer or the applicable OMM | Komatsu Genuine Supercoolant AF-NAC, an ethylene-glycol based all-season coolant, or an equivalent heavy-duty antifreeze-coolant meeting ASTM D3306/D4985. Available pre-diluted 50/50 for standard freeze protection; adjust concentration for extreme cold per the coolant label. |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Komatsu SL4D130-1B(S/N 24224-UP) 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 |
|
| Every 8,000 h |
|
Servicing the SL4D130-1B(S/N 24224-UP) beyond the schedule
Predictive Maintenance & Fluid Analysis
Run periodic oil sampling on this mechanically governed four-cylinder diesel to catch turbocharger bearing wear, injection pump wear, and cylinder blow-by before they cause a failure. Watch for rising iron, copper, and aluminum trends in the oil report. Because the engine has no electronic diagnostics, fluid analysis and simple visual checks (oil color, coolant condition, exhaust smoke color) are the main early-warning tools. Track coolant condition closely; corrosion-inhibitor depletion is a leading cause of liner pitting and water pump failure on this block.
Corrective & Common Repairs
Typical repairs on the SL4D130-1B center on the mechanical fuel system and turbocharger: injection pump timing drift and worn delivery valves cause rough running and smoke, and injector nozzles carbon up and need recalibration on a test bench. Turbocharger shaft seals wear and pass oil into the intake or exhaust, showing up as blue-gray smoke. Water pump seals, fan belts, and starter motor brushes are common wear items given the engine's age; verify part fitment against this exact serial break before ordering.
Overhaul & Rebuild Points
A top-end overhaul on this engine covers decarbonizing the cylinder head, lapping or replacing valves and seats, and inspecting valve guides for wear. A full inframe rebuild adds new liners, pistons, rings, and main/rod bearings, plus crankshaft and camshaft inspection for wear beyond factory tolerance. Because Komatsu revised internal specs across the 4D130 letter-suffix and serial-break system, always confirm piston, liner, and bearing fitment against the SL4D130-1B S/N 24224-up range specifically rather than a generic 4D130 listing.
Seasonal & Environment Servicing
In cold climates, check coolant anti-freeze concentration and battery condition before winter; this mechanically governed engine has no electronic cold-start assist, so a functioning glow system or ether aid and clean fuel free of wax or gelling matter more. In hot, dusty environments, shorten air cleaner element service intervals and inspect the restriction indicator more often, and clean radiator fins regularly to prevent overheating under sustained load. Drain fuel tank sediment and water more frequently in humid or dusty storage conditions.
SL4D130-1B(S/N 24224-UP) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 07281-00197 | Clamp,(With Pre-Fuel Filter) | Fuel system service | Check fitment → |
| 600-311-8291 | Cartridge,Fuel Filter | Fuel system service | Check fitment → |
| 6114-71-6200 | Fuel Filter Ass'Y | Fuel system service | Check fitment → |
| 6114-71-6210 | Head, Fuel Filter | Fuel system service | Check fitment → |
| ND092220-0040 | Filter,Fuel | Fuel system service | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
SL4D130-1B(S/N 24224-UP) attachments & work tools
Work-tool attachment applicability
This is a bare turbocharged 4-cylinder diesel engine block, not an implement-carrying machine. No swappable work-tool lineup (buckets, forks, blades, couplers) applies to the engine itself; any such fitment belongs to the host chassis it is installed in.
Engine size / power class
The 4D130 family is a turbocharged inline-4 diesel of roughly 8.5 L (518 cu in) displacement, bore x stroke near 130 x 150 mm (5.12 x 5.91 in). It falls in the power range used to drive mid-size crawler dozers and motor graders; naturally aspirated siblings exist in the family but this unit is the turbocharged variant.
Driveline coupling and mounting
The flywheel and flywheel housing mate to a torque-converter transmission through a flexible drive coupling, matching the engine to crawler-dozer and motor-grader power trains. Dowel-located engine-support brackets set drivetrain alignment, and mounting hardware differs between cab and canopy chassis.
Charging system options
Factory alternator choices include a lower-output and a higher-output unit (nominal 13A and 35A class), each with its own mounting bracket and fastener set. Selection follows the host machine's electrical load rather than the engine itself.
Starting system
A 5.5 kW starting motor is standard, offered in two mounting and shift-lever configurations split across the S/N 24224 production change. A cold-climate fastener kit is available for the starter mounting on cold-weather applications.
Cooling fan arrangement
Cooling fan drive is offered in suction (pull-through) and blower (push) configurations, matched to the host machine's radiator placement and duct routing. Fan and shroud bolt patterns differ between the two arrangements and are not interchangeable.
Environmental and noise-suppression kits
Factory options include sandy/dusty-terrain sealing hardware, a cold-terrain fastener kit, and a noise-suppression bolt set for stricter regional sound limits. A spark-arrester muffler variant is offered as an alternative to the standard exhaust muffler for fire-risk work sites.
Fuel and corrosion protection
An optional corrosion resistor element protects the cooling circuit on units without an auto-priming fuel system, and a water separator with priming provision sits ahead of the injection pump. Presence of these items depends on the host machine's fuel and cooling package rather than being universal.
Turbocharger and induction
The engine runs a single exhaust-driven turbocharger with dedicated lubrication feed and return piping; no naturally aspirated build is documented for this S/N range. Turbocharger service is handled as a rebuild kit rather than swapping individual internal components.
All SL4D130-1B(S/N 24224-UP) assemblies by section
Every catalogued assembly group for the Komatsu SL4D130-1B(S/N 24224-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Cooling And Electrical Systems
Komatsu : Sl4d130-1b(S/N 24224-Up) : Cooling And Electrical Systems : Alternator (13a)
| 60***50 | Alternator A. (13a),(With Non Hardening Pulley) | 1 |
| KD***31 | Bushing,Insulator | 2 |
| KD***80 | Packing | 1 |
Komatsu : Sl4d130-1b(S/N 24224-Up) : Cooling And Electrical Systems : Alternator (35a)
| 60***20 | Alternator A. (35a) | 1 |
| KD***00 | Collar | 1 |
| KD***72 | Bracket,Rear | 1 |
Komatsu : Sl4d130-1b(S/N 24224-Up) : Cooling And Electrical Systems : Alternator And Mounting (13a)
| 01***15 | Bolt | 1 |
| 01***15 | Bolt | 1 |
| 01***30 | Bolt | 1 |
Komatsu : Sl4d130-1b(S/N 24224-Up) : Cooling And Electrical Systems : Alternator And Mounting (35a)
| 01***22 | Bolt | 1 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
| 01***00 | Bolt (M10-1.50x100) | 1 |
Komatsu : Sl4d130-1b(S/N 24224-Up) : Cooling And Electrical Systems : Corrosion Resistor
| 01***35 | Bolt,(Without Auto Priming System) | 4 |
| 01***80 | Bolt, Mount Strainer Flange | 1 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 4 |
Komatsu : Sl4d130-1b(S/N 24224-Up) : Cooling And Electrical Systems : Safety Relay And Heater Signal
| 60***10 | Regulator Ass'Y,For 35a Alternator (Not Shown) | 1 |
| 60***10 | Safety Relay A.,Safety (For 800w Alternator) | 1 |
| 61***13 | Signal | 1 |
Komatsu : Sl4d130-1b(S/N 24224-Up) : Cooling And Electrical Systems : Starting Motor (5.5kw)(#.-)
| 60***93 | Starting Motor A.,(5.5kw)(See Fig.547) | 1 |
| KD***60 | Metal,Center | 1 |
| KD***80 | Washer Ass'Y,(Not Shown) | 1 |
Komatsu : Sl4d130-1b(S/N 24224-Up) : Cooling And Electrical Systems : Starting Motor (5.5kw)(#24224-.)
| 60***92 | Starting Motor A.,(5.5kw)(See Fig.545) | 1 |
| KD***80 | Shift Lever Ass'Y | 1 |
| KD***60 | Metal,Center | 1 |
Komatsu : Sl4d130-1b(S/N 24224-Up) : Cooling And Electrical Systems : Starting Motor And Mounting (5.5kw)
| 01***45 | Bolt,(Cold Terrain Spec.) | 3 |
| 01***36 | Washer,Spring | 3 |
| 07***00 | O-Ring,(F4350-65a1 -5 ) | 1 |
Komatsu : Sl4d130-1b(S/N 24224-Up) : Cooling And Electrical Systems : Water Pump And Cooling Fan
| 01***30 | Bolt,(For France Noise Suppression) | 6 |
| 01***50 | Bolt | 2 |
| 01***65 | Bolt,(For Suction Fan)(4d130-1d) | 5 |
Cylinder Block
Komatsu : Sl4d130-1b(S/N 24224-Up) : Cylinder Block : Balancer
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 4 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 4 |
| 04***19 | Key,(Dk025805-1910) | 1 |
Komatsu : Sl4d130-1b(S/N 24224-Up) : Cylinder Block : Camshaft And Tappet
| 01***25 | Bolt - Rear Guard Mounting | 2 |
| 01***36 | Washer,Radio Controlled Slag Handling | 2 |
| 04***28 | Key, Plain Woodruff | 1 |
Komatsu : Sl4d130-1b(S/N 24224-Up) : Cylinder Block : Crankshaft
| 04***50 | Key | 1 |
| 04***80 | Key,Seal | 1 |
| 13***40 | Coupling,(4d130-1f) | 1 |
Komatsu : Sl4d130-1b(S/N 24224-Up) : Cylinder Block : Cylinder Block (1/2)
| 01***22 | Stud | 5 |
| 01***30 | Stud | 1 |
| 01***60 | Stud | 6 |
Komatsu : Sl4d130-1b(S/N 24224-Up) : Cylinder Block : Cylinder Block (2/2)
| 01***14 | Bolt | 24 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 6 |
| 04***60 | Screw, Serial Number Plate | 4 |
Komatsu : Sl4d130-1b(S/N 24224-Up) : Cylinder Block : Engine Support
| 01***40 | Bolt,(Not Used With Cab) | 8 |
| 01***42 | Washer,Spring (For Pedal Steering) | 8 |
| 04***28 | Pin, Dowel - Transmission Case, Pin-Dowel | 4 |
Komatsu : Sl4d130-1b(S/N 24224-Up) : Cylinder Block : Flywheel And Flywheel Housing
| 01***50 | Bolt | 2 |
| 01***40 | Bolt,(Not Used With Cab) | 10 |
| 01***50 | Screw | 2 |
Komatsu : Sl4d130-1b(S/N 24224-Up) : Cylinder Block : Gear Case Cover
| 01***20 | Bolt,(Large Capacity Type) (Std) | 2 |
| 01***75 | Bolt,(For D57sr) | 15 |
| 01***30 | Bolt,Radio Controlled Slag Handling | 4 |
Komatsu : Sl4d130-1b(S/N 24224-Up) : Cylinder Block : Oil Pan
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
| 01***22 | Bolt,(Cold Terrain Spec.) | 24 |
| 01***30 | Bolt,(Cold Terrain Spec.) | 2 |
Komatsu : Sl4d130-1b(S/N 24224-Up) : Cylinder Block : Piston And Connecting Rod
| 61***20 | Ring | 8 |
| 61***14 | Bolt | 4 |
| 61***22 | Nut,(Service Parts) | 4 |
Cylinder Head
Komatsu : Sl4d130-1b(S/N 24224-Up) : Cylinder Head : Air Cleaner
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 3 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 3 |
Komatsu : Sl4d130-1b(S/N 24224-Up) : Cylinder Head : Air Intake Manifold And Connection
| 01***20 | Bolt,(Large Capacity Type) (Std) | 2 |
| 01***30 | Bolt,(For France Noise Suppression) | 4 |
| 01***00 | Bolt (M10-1.50x100) | 4 |
Komatsu : Sl4d130-1b(S/N 24224-Up) : Cylinder Head : Cylinder Head
| 01***25 | Bolt - Rear Guard Mounting | 2 |
| 01***08 | Nut, Regular Hexagon (M10-1.50) | 4 |
| 01***36 | Washer,Radio Controlled Slag Handling | 2 |
Komatsu : Sl4d130-1b(S/N 24224-Up) : Cylinder Head : Cylinder Head Cover
| 01***25 | Bolt,(Without Auto Priming System) | 3 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 3 |
| 07***26 | Clamp | 1 |
Komatsu : Sl4d130-1b(S/N 24224-Up) : Cylinder Head : Exhaust Manifold
| 01***80 | Bolt | 8 |
| 01***32 | Washer,(With Auto Emergency Steering) | 8 |
| 07***08 | Plug,(For W/O. Corrosion Resistor) | 2 |
Komatsu : Sl4d130-1b(S/N 24224-Up) : Cylinder Head : Muffler
| 01***40 | Bolt | 4 |
| 01***11 | Nut,(Spark Arrester Spec.) | 2 |
| 01***26 | Washer,(For Additional Rear Lamp) | 2 |
Komatsu : Sl4d130-1b(S/N 24224-Up) : Cylinder Head : Rocker Arm
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 4 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 4 |
| 04***35 | Pin,Cotter? Block And Collar | 2 |
Komatsu : Sl4d130-1b(S/N 24224-Up) : Cylinder Head : Turbocharger
| 01***30 | Bolt | 4 |
| 04***50 | Screw | 2 |
| 07***85 | O-Ring | 2 |
Komatsu : Sl4d130-1b(S/N 24224-Up) : Cylinder Head : Water Manifold And Thermostat
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 4 |
| 01***22 | Bolt,(Cold Terrain Spec.) | 9 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 13 |
Fuel System
Komatsu : Sl4d130-1b(S/N 24224-Up) : Fuel System : Fuel Filter And Mounting
| 01***55 | Bolt,(For Suction? Reversible Fan) | 2 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 2 |
| 01***16 | Washer,Radio Controlled Slag Handling | 2 |
Komatsu : Sl4d130-1b(S/N 24224-Up) : Fuel System : Fuel Injection Piping
| 01***25 | Bolt (M6-1.00x25) | 6 |
| 01***25 | Bolt,(Without Auto Priming System) | 2 |
| 01***19 | Washer,(Not Used With Ventilator) | 6 |
Komatsu : Sl4d130-1b(S/N 24224-Up) : Fuel System : Fuel Injection Pump (Coupling)
| ND***91 | Bolt | 8 |
| ND***20 | Coupling | 1 |
| ND***01 | Washer,Spring | 1 |
Komatsu : Sl4d130-1b(S/N 24224-Up) : Fuel System : Fuel Injection Pump (Feed Pump)
| ND***40 | Washer? 1mm,Plate | 1 |
| ND***50 | Rod? 5.000mm,Push (Green) | 1 |
| ND***70 | Washer,Union | 4 |
Komatsu : Sl4d130-1b(S/N 24224-Up) : Fuel System : Fuel Injection Pump (Governor) (1/2)
| ND***20 | Washer? 1.0mm,Cover Plate | 3 |
| ND***30 | Screw | 1 |
| ND***60 | O-Ring | 2 |
Komatsu : Sl4d130-1b(S/N 24224-Up) : Fuel System : Fuel Injection Pump (Governor) (2/2)
| ND***10 | Adapter | 1 |
| ND***30 | Plug | 1 |
| ND***80 | Stopper,Adjust | 1 |
Komatsu : Sl4d130-1b(S/N 24224-Up) : Fuel System : Fuel Injection Pump (Pump)
| 61***00 | Injection Pump Ass'Y | 1 |
| ND***30 | Ring | 1 |
| ND***80 | O-Ring | 1 |
Komatsu : Sl4d130-1b(S/N 24224-Up) : Fuel System : Fuel Injection Pump And Mounting
| 01***70 | Bolt | 4 |
| 01***30 | Bolt,(For France Noise Suppression) | 2 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 2 |
Komatsu : Sl4d130-1b(S/N 24224-Up) : Fuel System : Fuel Injection Pump Lubricating Oil Piping
| 01***16 | Bolt,(For Slag Handling) | 1 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 1 |
| 07***12 | Gasket,(Without Air Compressor Type) (K2) | 2 |
Komatsu : Sl4d130-1b(S/N 24224-Up) : Fuel System : Water Separator Piping
| 01***30 | Bolt,(Cold Terrain Spec.) | 2 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 1 |
| 01***30 | Bolt,(For France Noise Suppression) | 2 |
Komatsu : Sl4d130-1b(S/N 24224-Up) : Fuel System : Water Sepator
| 07***60 | O-Ring,(For Pc750?800?1800) (A2610) | 1 |
| 60***00 | Water Separator A.,(See Fig.2415) | 1 |
| 60***10 | Cover | 1 |
Lubricating Oil System
Komatsu : Sl4d130-1b(S/N 24224-Up) : Lubricating Oil System : Lubricating Oil Cooler
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
| 01***25 | Bolt,(Without Auto Priming System) | 1 |
| 01***45 | Bolt,(S6d155-4b) | 4 |
Komatsu : Sl4d130-1b(S/N 24224-Up) : Lubricating Oil System : Lubricating Oil Filter
| 01***50 | Bolt - Torque Converter Totransmission Mounting | 4 |
| 01***36 | Washer,Radio Controlled Slag Handling | 4 |
| 01***23 | Washer, Flat | 4 |
Komatsu : Sl4d130-1b(S/N 24224-Up) : Lubricating Oil System : Lubricating Oil Pump
| 01***50 | Bolt | 2 |
| 01***08 | Nut,R.H. Thread | 4 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 6 |
Komatsu : Sl4d130-1b(S/N 24224-Up) : Lubricating Oil System : Lubricating Oil Strainer
| 01***16 | Bolt,(For Slag Handling) | 2 |
| 01***40 | Bolt,(Dust And Dirt Protection) | 4 |
| 01***30 | Bolt,Radio Controlled Slag Handling | 4 |
Komatsu : Sl4d130-1b(S/N 24224-Up) : Lubricating Oil System : Turbocharger Lubricating Oil Piping
| 01***16 | Bolt,(For Slag Handling) | 1 |
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
| 01***40 | Bolt,(For Position Fixing) | 2 |
Tool And Kit
Komatsu : Sl4d130-1b(S/N 24224-Up) : Tool And Kit : Gasket Kit
| 02***91 | O-Ring (Kit) | 4 |
| 04***35 | Pin,Cotter? Block And Collar | 4 |
| 07***70 | O-Ring,(For Intake Air Cover) | 1 |
SL4D130-1B(S/N 24224-UP) serial number reference
The engine ID plate is riveted to the block, typically on the left side near the fuel injection pump or valve cover, and lists the manufacturer, engine model, and serial number - this older industrial engine family does not carry a 3-letter alpha PIN prefix, only a plain sequential serial number. To read it, match the model suffix stamped on the plate (the -1B in SL4D130-1B, where the leading S marks a turbocharged arrangement) against the serial number itself to place the engine in its correct production block and parts range.
| Prefix | Identifies | Notes |
|---|---|---|
| S/N 10006-UP | 4D130-1 / S4D130-1 (base arrangement) | Naturally aspirated and turbocharged base blocks of the 4-cylinder, roughly 8.5-liter 130-series engine. Fitted to Komatsu D53-series crawler dozers (D53A-16, D53P-16, D53S-16/-17) of the early-to-mid 1980s. |
| S/N 10006-21530 | S4D130-1A | Turbocharged arrangement running within the base block's early serial band, closed out at this upper serial before later suffix blocks opened. Single-source figure - confirm exact host machine and cutoff with a dealer. |
| S/N 10030-UP | 4D130-1G-VS | A distinct running arrangement opening within the same early serial band as the base block, on Komatsu D53-series dozer applications. Single-source figure - confirm with dealer. |
| S/N 10544-UP | 4D130-1C-A / 4D130-1C-P / 4D130-1D / 4D130-1E / 4D130-1F | A cluster of running-production suffix blocks opening together partway through the early serial range, on the same D53-series dozer and GD500-series grader applications. Shared start point corroborated across a parts cross-reference listing and a separate machine-to-engine lookup reference, which also ties 4D130-1E to D53P-16 and 4D130-1F to D53S-16 at this same serial break. |
| S/N 24224-UP | SL4D130-1B | This engine's own turbocharged arrangement. Grouped with the neighboring 4D130-1C/-1D/-1F and SL4D130-1C blocks in parts cross-reference listings that also tag GD500-series grader applications, consistent with the 130-series family being shared across Komatsu D53-series dozers and GD500-series motor graders. |
| S/N 24260-UP | SL4D130-1C | Next running-production block immediately after SL4D130-1B, grouped with it in the same cross-reference parts listings. A separate arrangement, not part of the -1B range - confirm the exact split point with a dealer. |
| S/N 28323-UP | 4D130-1H | Latest identified suffix block in the family, opening well after the -1B/-1C arrangements, reported paired with D53S-17 dozer production. Confirm host application and exact cutoff with a dealer. |
Frequently asked questions
What engine powers the SL4D130-1B (S/N 24224-up)?
SL4D130-1B is itself the engine, not a chassis: a turbocharged, water-cooled, in-line four-cylinder diesel from Komatsu's 4D130 family, about 8.5 liters (518 cu in) displacement, with a mechanical jerk-type injection pump and governor and no electronic controls. It is documented at roughly 88 kW (118 hp) at 1900 rpm in at least one factory application; turbocharged 4D130-family variants generally span about 100-135 hp depending on the specific series rating.
What is the operating weight for the SL4D130-1B?
The SL4D130-1B designation covers the engine only, so it has no standalone operating weight. Komatsu installed 4D130-family engines in several different chassis: contemporary D53-series medium crawler dozers ran roughly 12-14 tonnes (26,000-31,000 lb), the D57S-1 crawler dozer around 14.6-15.3 tonnes (32,000-33,700 lb), and GD500-series motor graders in a broadly similar class. Actual weight depends entirely on which machine the engine is installed in, not on the engine itself.
What replaced the SL4D130-1B?
Within its own model line, the SL4D130-1B (S/N 24224-up) was directly followed by the SL4D130-1C, which takes over at S/N 24260-up, a running update on the same basic block. More broadly, Komatsu's later dozer and grader generations in this class moved to newer engine families, eventually electronically governed, as emissions requirements tightened, phasing mechanically governed engines like this one out of new-machine production.
What SL4D130-1B(S/N 24224-UP) owners discuss
What turbocharger behavior is typical for this engine family?
What's the most common coolant-loss failure on this engine, and how do owners isolate it?
Is this a mechanical or common-rail fuel system, and what does that mean for service?
What charging-system quirks show up on the electrical side?
Any cold-start quirks specific to this engine?
What's the practical wear indicator to track on an engine this simple?
What should a buyer check before taking on a used SL4D130-1B(S/N 24224-UP) engine?
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
Need a specific SL4D130-1B(S/N 24224-UP) part?
Search live OEM part data, check fitment, and cross-reference alternatives with Heavy Parts AI.