Komatsubulldozersmall ( - d39)
Komatsu D31Q-16(S/N 25001-UP)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu D31Q-16 (S/N 25001-UP) is a compact crawler loader designed for versatile earthmoving and utility applications. This machine belongs to the D-series family, featuring a 4D105-3 engine providing approximately 61.7 hp (46 kW) to 63 hp (47 kW). Operating within a weight class of roughly 15,543 lb (7,053 kg), it is configured with a 0.8 m³ (1.1 yd³) heaped bucket capacity and a track width of 600 mm (23.6 in). Production for this specific configuration spanned from 1979 to 1986.
Across the D31 series, evolution focused on transmission types and track configurations, with 'A' models offering standard widths and 'P' models providing wide-track swamp configurations. The D31Q-16 remains a significant machine in the used market due to its high durability and ease of maintenance for small-scale construction. Its compact footprint and specialized crawler loader design make it a sought-after unit for contractors requiring maneuverability in tight jobsite environments where larger dozers cannot operate.
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 D31Q-16(S/N 25001-UP) specifications
Engine
| Engine Model | 4D105-3 |
| Net Power | 61.7 hp (46 kW) to 63 hp (47 kW) |
| Displacement | 264 cu in (4.3 L) to 4.4 L |
| Engine Speed at Max Torque | 2,350 rpm |
| Engine Manufacturer | Komatsu |
Weights
| Operating Weight | 15,543 lb (7,053 kg) to 15,550 lb (7,053.4 kg) |
Dimensions
| Transport Length | 4.04 m (13.28 ft) to 4.045 m |
| Transport Width | 2.25 m (7.38 ft) to 2.25 m |
| Transport Height | 2.62 m (8.6 ft) |
| Clearance at Full Height and Dump | 2.645 m (8.68 ft) |
| Reach at Dump Height | 750 mm (2.47 ft) |
| Track Gauge | 1,650 mm (64.97 in) |
| Length of Track on Ground | 1,880 mm (6.17 ft) |
| Track Shoe Width | 600 mm (23.6 in) to 600 mm (23.63 in) |
Performance
| Max Speed | 6.5 km/h (4.04 mph) to 6.5 km/h (4.1 mph) |
| Ground Pressure | 30.4 kPa (4.41 psi) to 30.4 kPa |
| Soil Pressure | 0.31 kg/cm² |
| Static Tipping Load | 4,359.1 kg (9,610 lb) |
| Breakout Force - Std Bucket | 66.7 kN (14,990 lb) |
Blades/Buckets
| Bucket Capacity - Heaped | 0.8 m³ (1.1 yd³) |
Service Capacities
| Fuel Tank Capacity | 115 L (30.4 gal) |
| Cooling System Fluid Capacity | 22 L (5.9 gal) |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
D31Q-16(S/N 25001-UP) fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine Crankcase (w/ filter) | not specified | EO (Engine Oil) |
| Cooling System | 22 L (5.9 gal) | not specified |
| Fuel Tank | 115 L (30.4 gal) | not specified |
| Transmission/Powertrain | not specified | TO (Transmission Oil) |
| Hydraulic System/Tank | not specified | TO30 |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Komatsu D31Q-16(S/N 25001-UP) maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
Servicing the D31Q-16(S/N 25001-UP) beyond the schedule
Predictive Maintenance & Fluid Analysis
Monitor the 4D10lar engine oil and hydraulic fluids regularly. Use fluid analysis to detect early signs of metal wear or coolant contamination in the 22 L (5.9 gal) cooling system. Regularly check fuel levels in the 115 L (30.4 gal) tank for water or sediment. Tracking changes in hydraulic pressure can predict pump failure before it occurs, protecting the machine's breakout force capabilities.
Corrective & Common Repairs
Address hydraulic leaks at the bucket cylinders and lift arms immediately to prevent loss of 66.7 kN (14,990 lb) breakout force. Monitor track tension; worn pins or bushings will require undercarriage adjustment or replacement. If engine power drops, inspect the fuel filters and air intake system for blockages. Ensure all electrical connections near the engine compartment are secure to prevent intermittent sensor or starting issues.
Overhaul & Rebuild Points
Plan major overhauls around the 4D105-3 engine displacement and final drive wear. When rebuilding, inspect the 264 cu in (4.4 L) engine block for fatigue and replace all seals within the hydraulic circuit. Evaluate the 5 track rollers per side for flat spots or bearing failure. A complete drivetrain rebuild should include a thorough inspection of the transmission clutch and all pivot pins on the loader linkage.
Seasonal & Environment Servicing
In cold weather, ensure the 22 L (5.9 gal) cooling system is treated with appropriate antifreeze to prevent block freezing. During high-dust operations, increase frequency of air cleaner cleaning to maintain engine breathing. In muddy or swampy conditions, clean the 600 mm (23.6 in) track shoes and rollers daily to prevent debris buildup that increases ground pressure and undercarriage strain.
D31Q-16(S/N 25001-UP) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 6127-61-2971 | O-Ring,Oil Cooler Element | Lubrication service | Check fitment → |
| 600-181-9200 | Element Ass'Y,Outer | Scheduled service item | Check fitment → |
| 600-181-9500 | Element Ass'Y | Scheduled service item | Check fitment → |
| 600-181-9600 | Element Ass'Y,(With Tension Pulley Type) | Scheduled service item | Check fitment → |
| 07271-01460 | Hose, Filter To Injection Pump | Scheduled service item | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
D31Q-16(S/N 25001-UP) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| E03 | Diagnostic error code | Electronic control system fault | Verify with dealer diagnostics |
| 15B0NX | Transmission oil filter clogging | Contaminated transmission fluid or exhausted filter element | Inspect and replace transmission oil filter |
| 15F0KM | R o F shifting abuse 1 | Operational error during forward/reverse shifting | Review operator procedures to prevent rapid direction changes |
| 15F0MB | R o F shifting abuse 2 | Operational error during forward/reverse shifting | Review operator procedures to prevent rapid direction changes |
| 15F7KM | Forward clutch disk abuse | Incorrect operation or improper setting of the forward clutch | Inspect clutch disk settings and operational technique |
| 15G0MW | R clutch slipping | Reverse clutch failure or improper pressure/setting | Check reverse clutch operation and hydraulic pressure |
| 15G7KM | Reverse clutch disk abuse | Incorrect operation or improper setting of the reverse clutch | Inspect clutch disk settings and operational technique |
| 15H0MW | Hi clutch slipping | High range clutch slippage | Check high range clutch pressure and wear |
| 15J0MW | Lo clutch slipping | Low range clutch slippage | Check low range clutch pressure and wear |
| A570NX | Engine oil filter clogging | Engine oil contamination or extended service interval | Replace engine oil filter and check oil condition |
| AA10NX | Air cleaner clogging | Excessive dust intake or saturated air filter element | Inspect and replace air cleaner element |
| AB00KE | Low charge voltage / Low battery charge voltage | Alternator failure or battery/charging system malfunction | Test alternator output and battery health |
| B@BAZK | Engine oil level low | Oil consumption or external leak | Check engine oil dipstick and inspect for leaks |
| B@BCNS | Engine water overheat | Coolant loss, radiator blockage, or thermostat failure | Check coolant level and inspect cooling system for obstructions |
| B@BFZK | Lowering of fuel level | Fuel consumption or leak in the fuel delivery system | Check fuel tank levels and inspect for leaks |
| B@HANS | Hydraulic oil overheat | Excessive hydraulic load or cooler malfunction | Monitor hydraulic operating temperature and check cooler |
| CA144 | Coolant temperature sensor high error | Sensor failure or actual engine overheating condition | Verify coolant temperature and inspect sensor wiring |
| CA441 | Battery voltage low error | Weak battery or high parasitic draw | Test battery voltage under load |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
D31Q-16(S/N 25001-UP) attachments & work tools
Blades
Standard configuration features a 6-way straight blade with a width of 2.895 m (114 inches). Tilt device and air conditioning are not available on the standard D31Q-16 model.
Rippers
The standard configuration does not include a rear ripper. Multi-shank rippers are noted as available for the Komatsu D31 series via aftermarket options.
Winches
Not documented for this exact serial range — verify with your dealer.
Drawbars/counterweights
Not documented for this exact serial range — verify with your dealer.
Cab/ROPS guarding options
Not documented for this exact serial range — verify with your dealer.
Hydraulic arrangement notes
The machine utilizes a 4D105-3 engine. Specific hydraulic arrangements for front or rear tool integration are not specified in the technical data.
All D31Q-16(S/N 25001-UP) assemblies by section
Every catalogued assembly group for the Komatsu D31Q-16(S/N 25001-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
4d105-3c S/N 40138-Up
Komatsu : D31q-16(S/N 25001-Up) : 4d105-3c S/N 40138-Up : Air Intake Connection And Air Cleaner(#40138-56494)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
| 01***80 | Bolt, Mount Strainer Flange | 2 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 4 |
Komatsu : D31q-16(S/N 25001-Up) : 4d105-3c S/N 40138-Up : Air Intake Connection And Air Cleaner(#56495-63805)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
| 01***80 | Bolt, Mount Strainer Flange | 2 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 4 |
Komatsu : D31q-16(S/N 25001-Up) : 4d105-3c S/N 40138-Up : Air Intake Connection And Air Cleaner(#63806-)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
| 01***70 | Bolt, Spacer | 2 |
| 01***30 | Bolt, Mount Control Valve | 2 |
Komatsu : D31q-16(S/N 25001-Up) : 4d105-3c S/N 40138-Up : Alternator
| 60***10 | Alternator A. (25a) | 1 |
| KD***30 | Holder,Brush | 1 |
| KD***72 | Slip Ring Ass'Y | 1 |
Komatsu : D31q-16(S/N 25001-Up) : 4d105-3c S/N 40138-Up : Alternator (For Trimming Dozer)
| 60***80 | Alternator A. (13a) | 1 |
| KD***30 | Holder,Brush | 1 |
| KD***72 | Slip Ring Ass'Y | 1 |
Komatsu : D31q-16(S/N 25001-Up) : 4d105-3c S/N 40138-Up : Alternator And Mounting
| 01***40 | Bolt,(Dust And Dirt Protection) | 1 |
| 01***30 | Bolt,(For Trimming Dozer) | 1 |
| 01***25 | Bolt | 1 |
Komatsu : D31q-16(S/N 25001-Up) : 4d105-3c S/N 40138-Up : Camshaft And Tappet(#40138-40495)
| 01***18 | Bolt | 2 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 2 |
Komatsu : D31q-16(S/N 25001-Up) : 4d105-3c S/N 40138-Up : Camshaft And Tappet(#40496-)
| 01***18 | Bolt | 2 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 2 |
Komatsu : D31q-16(S/N 25001-Up) : 4d105-3c S/N 40138-Up : Crankshaft
| 01***30 | Bolt,(For France Noise Suppression) | 4 |
| 02***04 | Plug,(Not Shown) | 4 |
| 04***25 | Key | 1 |
Komatsu : D31q-16(S/N 25001-Up) : 4d105-3c S/N 40138-Up : Cylinder Block
| 01***22 | Bolt,(Cold Terrain Spec.) | 2 |
| 01***30 | Bolt,Radio Controlled Slag Handling | 7 |
| 01***65 | Bolt | 3 |
Komatsu : D31q-16(S/N 25001-Up) : 4d105-3c S/N 40138-Up : Cylinder Head
| 01***16 | Bolt,(For Slag Handling) | 6 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 6 |
Komatsu : D31q-16(S/N 25001-Up) : 4d105-3c S/N 40138-Up : Cylinder Head Cover(#40138-63805)
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
| 01***50 | Bolt,(For Trimming Dozer) | 8 |
| 01***70 | Bolt | 4 |
Komatsu : D31q-16(S/N 25001-Up) : 4d105-3c S/N 40138-Up : Cylinder Head Cover(#63806-)
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
| 01***50 | Bolt,(For Trimming Dozer) | 8 |
| 01***70 | Bolt | 4 |
Komatsu : D31q-16(S/N 25001-Up) : 4d105-3c S/N 40138-Up : Emergency Relay And Resistor
| 60***70 | Switch,Air Intake Heater | 1 |
| 60***60 | Switch,Heater Relay | 1 |
| 61***50 | Resistor | 1 |
Komatsu : D31q-16(S/N 25001-Up) : 4d105-3c S/N 40138-Up : Exhaust Manifold And Muffler
| 01***20 | Capscrew - M10 | 2 |
| 01***25 | Bolt, Mount Cover | 4 |
| 01***40 | Bolt, Mount Retainer | 8 |
Komatsu : D31q-16(S/N 25001-Up) : 4d105-3c S/N 40138-Up : Flywheel And Flywheel Housing
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 15 |
| 01***40 | Bolt,(Dust And Dirt Protection) | 5 |
| 01***35 | Bolt - Torque Converter Totransmission Mounting | 6 |
Komatsu : D31q-16(S/N 25001-Up) : 4d105-3c S/N 40138-Up : Front Cover
| 01***45 | Bolt,(For Suction? Reversible Fan) | 7 |
| 01***75 | Bolt,(For D57sr) | 2 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 9 |
Komatsu : D31q-16(S/N 25001-Up) : 4d105-3c S/N 40138-Up : Fuel Filter And Mounting
| 01***35 | Bolt, Mounting - Flywheel Housing End | 2 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 2 |
| 01***16 | Washer,Radio Controlled Slag Handling | 2 |
Komatsu : D31q-16(S/N 25001-Up) : 4d105-3c S/N 40138-Up : Fuel Injection Pump (Feed Pump)
| 61***10 | Injection Pump Ass'Y,(See Fig.1451) | 1 |
| DK***00 | Tappet | 1 |
| DK***20 | Housing | 1 |
Komatsu : D31q-16(S/N 25001-Up) : 4d105-3c S/N 40138-Up : Fuel Injection Pump (Governor) (1/2)
| 61***10 | Injection Pump Ass'Y,(See Fig.1451) | 1 |
| DK***00 | Gasket | 1 |
| DK***00 | Adapter | 1 |
Komatsu : D31q-16(S/N 25001-Up) : 4d105-3c S/N 40138-Up : Fuel Injection Pump (Governor) (2/2)
| 61***10 | Injection Pump Ass'Y,(See Fig.1451) | 1 |
| DK***40 | Gasket,Air Compressor | 2 |
| DK***00 | Collar | 1 |
Komatsu : D31q-16(S/N 25001-Up) : 4d105-3c S/N 40138-Up : Fuel Injection Pump (Pump)
| 61***10 | Injection Pump Ass'Y,(See Fig.1451) | 1 |
| 61***11 | Injection Pump Ass'Y | 1 |
| DK***20 | Plunger Ass'Y | 1 |
Komatsu : D31q-16(S/N 25001-Up) : 4d105-3c S/N 40138-Up : Fuel Injection Pump And Piping
| 01***25 | Bolt (M6-1.00x25) | 1 |
| 01***35 | Stud | 6 |
| 01***35 | Stud | 4 |
Komatsu : D31q-16(S/N 25001-Up) : 4d105-3c S/N 40138-Up : Fuel Nozzle And Spill Pipe
| 01***65 | Bolt | 8 |
| 07***12 | Gasket,Mechanical Pump Piping | 6 |
| 61***52 | Bolt, Joint | 1 |
Komatsu : D31q-16(S/N 25001-Up) : 4d105-3c S/N 40138-Up : Gasket Kit
| 01***23 | Washer,Lock (K2) | 1 |
| 07***65 | O-Ring,Injection Pump Case | 1 |
| 07***70 | O-Ring,(For Intake Air Cover) | 1 |
Komatsu : D31q-16(S/N 25001-Up) : 4d105-3c S/N 40138-Up : Intake Air Heater(#40138-63805)
| 01***16 | Bolt,(For Slag Handling) | 1 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 4 |
| 01***05 | Nut (Welded) | 2 |
Komatsu : D31q-16(S/N 25001-Up) : 4d105-3c S/N 40138-Up : Lubricating Oil Filter(#40138-52218)
| 01***16 | Bolt,(For Slag Handling) | 8 |
| 01***25 | Bolt,(Without Auto Priming System) | 1 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 1 |
Komatsu : D31q-16(S/N 25001-Up) : 4d105-3c S/N 40138-Up : Lubricating Oil Filter(#52219-)
| 01***16 | Bolt,(For Slag Handling) | 11 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 1 |
| 01***45 | Bolt,(For Suction? Reversible Fan) | 1 |
Komatsu : D31q-16(S/N 25001-Up) : 4d105-3c S/N 40138-Up : Lubricating Oil Pump
| 01***30 | Bolt,(For France Noise Suppression) | 5 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 5 |
| 01***16 | Washer,Radio Controlled Slag Handling | 5 |
Komatsu : D31q-16(S/N 25001-Up) : 4d105-3c S/N 40138-Up : Lubricating Oil Strainer
| 01***25 | Bolt,(Without Auto Priming System) | 2 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
| 01***08 | Nut, Regular Hexagon (M10-1.50) | 1 |
Komatsu : D31q-16(S/N 25001-Up) : 4d105-3c S/N 40138-Up : Oil Pan
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 23 |
| 01***30 | Bolt,(For France Noise Suppression) | 2 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 1 |
Komatsu : D31q-16(S/N 25001-Up) : 4d105-3c S/N 40138-Up : Piston And Connecting Rod
| 61***14 | Bolt | 2 |
| 61***15 | Bolt,(Service Parts) | 2 |
| 61***22 | Nut,(Service Parts) | 2 |
Komatsu : D31q-16(S/N 25001-Up) : 4d105-3c S/N 40138-Up : Rocker Arm
| 01***12 | Bolt,(Without R.P.C.U.) | 1 |
| 01***80 | Bolt,(Shim 5 Pieces Over) | 4 |
| 01***19 | Washer,(Not Used With Ventilator) | 1 |
Komatsu : D31q-16(S/N 25001-Up) : 4d105-3c S/N 40138-Up : Starting Motor (#42792-..)
| 60***41 | Starting Motor Ass'Y,(See Fig.1545) | 1 |
| 60***42 | Starting Motor A.,(5.5kw) (See Fig.2546) | 1 |
| KD***10 | Clutch Ass'Y,Over Running | 1 |
Komatsu : D31q-16(S/N 25001-Up) : 4d105-3c S/N 40138-Up : Starting Motor (1/2)(#..-)
| 60***43 | Starting Motor A.,(5.5kw) (See Fig.0661) | 1 |
| KD***10 | Clutch Ass'Y,Over Running | 1 |
| KD***01 | O-Ring | 1 |
Komatsu : D31q-16(S/N 25001-Up) : 4d105-3c S/N 40138-Up : Starting Motor (2/2)(#..-)
| KD***01 | Washer,Seal | 3 |
| KD***80 | Shift Lever Ass'Y | 1 |
| KD***30 | Contactor,Moving | 1 |
Komatsu : D31q-16(S/N 25001-Up) : 4d105-3c S/N 40138-Up : Starting Motor (For Trimming Dozer)
| 60***51 | Starting Motor A | 1 |
| KD***10 | Clutch Ass'Y,Over Running | 1 |
| KD***80 | Field Coil Ass'Y | 1 |
Komatsu : D31q-16(S/N 25001-Up) : 4d105-3c S/N 40138-Up : Starting Motor And Mounting
| 01***35 | Bolt - Torque Converter Totransmission Mounting | 3 |
| 01***36 | Washer, Spring | 3 |
| 07***00 | O-Ring,(F4350-65a1 -5 ) | 1 |
Komatsu : D31q-16(S/N 25001-Up) : 4d105-3c S/N 40138-Up : Starting Motor(#40138-42791)
| 60***40 | Starting Motor A.,(See Fig.1545) | 1 |
| 60***41 | Starting Motor A.,(See Fig.1545) | 1 |
| 60***42 | Starting Motor A | 1 |
Komatsu : D31q-16(S/N 25001-Up) : 4d105-3c S/N 40138-Up : Water Pump And Cooling Fan(#40138-47893)
| 01***16 | Bolt,(For Slag Handling) | 3 |
| 01***25 | Bolt,(Without Auto Priming System) | 6 |
| 01***30 | Bolt,(Cold Terrain Spec.) | 2 |
Komatsu : D31q-16(S/N 25001-Up) : 4d105-3c S/N 40138-Up : Water Pump And Cooling Fan(#47894-)
| 01***16 | Bolt,(For Slag Handling) | 3 |
| 01***25 | Bolt,(Without Auto Priming System) | 6 |
| 01***30 | Bolt,(Cold Terrain Spec.) | 8 |
Damper And Transmission
Komatsu : D31q-16(S/N 25001-Up) : Damper And Transmission : 1st Housing
| 01***25 | Bolt,(Without Auto Priming System) | 2 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 4 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 4 |
Komatsu : D31q-16(S/N 25001-Up) : Damper And Transmission : 2nd Housing
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 4 |
| 01***60 | Bolt | 10 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 10 |
Komatsu : D31q-16(S/N 25001-Up) : Damper And Transmission : Damper
| 01***18 | Bolt (Op) | 12 |
| 01***30 | Bolt,(For France Noise Suppression) | 16 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 16 |
Komatsu : D31q-16(S/N 25001-Up) : Damper And Transmission : Forward And 3rd Housing
| 04***24 | Pin,Dowel (For No.3 Housing) | 2 |
| 04***12 | Pin, Spring | 3 |
| 04***20 | Ring, Snap | 1 |
Komatsu : D31q-16(S/N 25001-Up) : Damper And Transmission : Inching Pedal(#25001-27100)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
| 01***35 | Screw | 1 |
| 01***20 | Screw | 1 |
Komatsu : D31q-16(S/N 25001-Up) : Damper And Transmission : Inching Pedal(#27101-)
| 01***40 | Bolt,(Dust And Dirt Protection) | 2 |
| 01***35 | Screw | 1 |
| 01***20 | Screw | 1 |
Komatsu : D31q-16(S/N 25001-Up) : Damper And Transmission : Modulation Valve
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 4 |
| 01***60 | Bolt,(Without Alternator Bracket) | 2 |
| 01***70 | Bolt | 6 |
Komatsu : D31q-16(S/N 25001-Up) : Damper And Transmission : Reverse Housing
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
| 01***12 | Washer,Holder | 1 |
| 04***00 | Key | 1 |
Komatsu : D31q-16(S/N 25001-Up) : Damper And Transmission : Selector And Inching Valve(#25001-27100)
| 01***45 | Bolt,(S6d155-4b) | 14 |
| 01***06 | Nut, Regular Hexagon (M8-1.25) | 1 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 14 |
Komatsu : D31q-16(S/N 25001-Up) : Damper And Transmission : Selector And Inching Valve(#27101-)
| 01***25 | Bolt,(Without Auto Priming System) | 2 |
| 01***50 | Bolt,(For Trimming Dozer) | 5 |
| 01***65 | Bolt,(For Alternator Bracket Mount) | 3 |
Komatsu : D31q-16(S/N 25001-Up) : Damper And Transmission : Transmission Case
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
| 01***25 | Bolt,(Without Auto Priming System) | 3 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 6 |
Komatsu : D31q-16(S/N 25001-Up) : Damper And Transmission : Transmission Control Lever
| 01***30 | Bolt,(Cold Terrain Spec.) | 3 |
| 01***16 | Bolt,(Sandy And Dusty Spec.) | 2 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 2 |
Komatsu : D31q-16(S/N 25001-Up) : Damper And Transmission : Transmission Control Linkage
| 01***30 | Bolt,(Cold Terrain Spec.) | 4 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 7 |
| 01***05 | Nut? L.H. Thread,R.H. Thread | 2 |
Komatsu : D31q-16(S/N 25001-Up) : Damper And Transmission : Transmission Pump
| 01***55 | Bolt,(For Trimming Dozer) | 7 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 7 |
| 07***14 | O-Ring,(F4350-63a0 -20 ), O-Ring | 2 |
Komatsu : D31q-16(S/N 25001-Up) : Damper And Transmission : Universal Joint
| 01***40 | Bolt,(For Position Fixing) | 16 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 16 |
| 07***20 | Plug,(D31s) | 1 |
Engine Related Parts And Electrical System
Komatsu : D31q-16(S/N 25001-Up) : Engine Related Parts And Electrical System : Battery
| 01***30 | Bolt,(For Mechanical Governor) | 1 |
| 01***18 | Bolt | 1 |
| 01***08 | Nut, Regular Hexagon (M10-1.50) | 8 |
Komatsu : D31q-16(S/N 25001-Up) : Engine Related Parts And Electrical System : Electrical System(#25001-28000)
| 01***12 | Bolt,(Without R.P.C.U.) | 2 |
| 01***16 | Bolt,(For Slag Handling) | 3 |
| 01***25 | Bolt,(Without Auto Priming System) | 2 |
Komatsu : D31q-16(S/N 25001-Up) : Engine Related Parts And Electrical System : Electrical System(#28001-)
| 01***12 | Bolt,(Without R.P.C.U.) | 2 |
| 01***16 | Bolt (Welded) | 2 |
| 01***16 | Bolt,(For Slag Handling) | 5 |
Komatsu : D31q-16(S/N 25001-Up) : Engine Related Parts And Electrical System : Engin Mounting Parts
| 01***20 | Bolt,Front (Except Japan) | 4 |
| 07***09 | Clamp,(With Cylinder Cover) | 6 |
| 11***10 | Cushion | 8 |
Komatsu : D31q-16(S/N 25001-Up) : Engine Related Parts And Electrical System : Fuel Control Lever
| 01***25 | Bolt,(Without Auto Priming System) | 1 |
| 01***30 | Bolt,(Cold Terrain Spec.) | 2 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 3 |
Komatsu : D31q-16(S/N 25001-Up) : Engine Related Parts And Electrical System : Fuel Tank And Piping(#25001-28000)
| 01***16 | Bolt,(Sandy And Dusty Spec.) | 2 |
| 01***30 | Bolt,(For France Noise Suppression) | 3 |
| 01***30 | Bolt,(For Center Guard) | 3 |
Komatsu : D31q-16(S/N 25001-Up) : Engine Related Parts And Electrical System : Fuel Tank And Piping(#28001-)
| 01***16 | Bolt,(Sandy And Dusty Spec.) | 2 |
| 01***35 | Bolt,(For Pedal Steering) | 4 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 2 |
Komatsu : D31q-16(S/N 25001-Up) : Engine Related Parts And Electrical System : Fuel Tank And Piping? With Additional Fuel Filter (Except Japan)(#25001-28000)
| 01***16 | Bolt,(Sandy And Dusty Spec.) | 2 |
| 01***30 | Bolt,(For France Noise Suppression) | 3 |
| 01***30 | Bolt,(For Center Guard) | 3 |
Komatsu : D31q-16(S/N 25001-Up) : Engine Related Parts And Electrical System : Fuel Tank And Piping? With Fuel Strainer (Except Japan)(#28001-)
| 01***16 | Bolt,(Sandy And Dusty Spec.) | 2 |
| 01***35 | Bolt,(For Pedal Steering) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
Komatsu : D31q-16(S/N 25001-Up) : Engine Related Parts And Electrical System : Instrument Panel
| 01***16 | Bolt (Welded) | 2 |
| 01***16 | Bolt,(Sandy And Dusty Spec.) | 2 |
| 01***20 | Screw - Turn Signal And Parkinglight Mounting | 2 |
Komatsu : D31q-16(S/N 25001-Up) : Engine Related Parts And Electrical System : Oil Cooler And Piping
| 01***20 | Bolt,(Large Capacity Type) (Std) | 1 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 11 |
| 01***70 | Bolt, Spacer | 4 |
Komatsu : D31q-16(S/N 25001-Up) : Engine Related Parts And Electrical System : Radiator And Piping
| 01***16 | Bolt,(Sandy And Dusty Spec.) | 10 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 18 |
| 01***40 | Bolt,(Dust And Dirt Protection) | 1 |
Guard
Komatsu : D31q-16(S/N 25001-Up) : Guard : Cross Bar(#25001-28000)
| 01***50 | Bolt, Fuel Tank Mounting - Front Left | 36 |
| 01***60 | Flat Washer - M20 (Hardened) | 36 |
| 04***42 | Pin,Dowel? Gear Case Cover | 4 |
Komatsu : D31q-16(S/N 25001-Up) : Guard : Engine Bottom Guard
| 01***25 | Bolt | 3 |
| 01***35 | Bolt,(For Pedal Steering) | 16 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 3 |
Komatsu : D31q-16(S/N 25001-Up) : Guard : Hitch(#25001-28000)
| 01***55 | Bolt, Strut Mounting - To Radiator And Rear Frame | 2 |
| 01***60 | Flat Washer - M20 (Hardened) | 2 |
| 04***12 | Pin,Cotter (For Ripper) | 1 |
Komatsu : D31q-16(S/N 25001-Up) : Guard : Hitch(#28001-)
| 01***55 | Bolt, Strut Mounting - To Radiator And Rear Frame | 2 |
| 01***60 | Flat Washer - M20 (Hardened) | 2 |
| 11***20 | Hitch Ass'Y | 1 |
Komatsu : D31q-16(S/N 25001-Up) : Guard : Mark And Plate (English)(#25001-28000)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***35 | Plate? Name,Machine (Limited Supply) | 1 |
| 09***60 | Plate? Safety,Before Operating (Usa Spec.) | 1 |
Komatsu : D31q-16(S/N 25001-Up) : Guard : Mark And Plate (English)(#28001-28741)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***00 | Plate? Safety,Inspection And Maintenance | 1 |
| 09***35 | Plate? Name,(Limited Supply) (English) | 1 |
Komatsu : D31q-16(S/N 25001-Up) : Guard : Mark And Plate (English)(#28742-)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***00 | Plate? Safety,Inspection And Maintenance | 1 |
| 09***35 | Plate? Name,(Limited Supply) (English) | 1 |
Komatsu : D31q-16(S/N 25001-Up) : Guard : Mark And Plate (French)(#25001-28000)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***35 | Plate? Name,(Limited Supply) (Ex. France) | 1 |
| 09***01 | Plate? Caution,Fuel Tank Water Drain | 1 |
Komatsu : D31q-16(S/N 25001-Up) : Guard : Mark And Plate (French)(#28001-28741)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***00 | Plate? Safety,Inspection And Maintenance | 1 |
| 09***35 | Plate? Name,(Limited Supply) (French) | 1 |
Komatsu : D31q-16(S/N 25001-Up) : Guard : Mark And Plate (French)(#28742-)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***00 | Plate? Safety,Inspection And Maintenance | 1 |
| 09***35 | Plate? Name,(Limited Supply) (French) | 1 |
Komatsu : D31q-16(S/N 25001-Up) : Guard : Mark And Plate (General Spec.) (Except Japan)(#25001-28000)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***35 | Plate? Name,Machine (Limited Supply) | 1 |
| 09***01 | Plate? Caution,Fuel Tank? Water Drain | 1 |
Komatsu : D31q-16(S/N 25001-Up) : Guard : Mark And Plate (German)(#25001-28000)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***70 | Plate? Operating,Bucket Lever | 1 |
| 09***16 | Plate? Operating,Ripper Control Lever Lock | 1 |
Komatsu : D31q-16(S/N 25001-Up) : Guard : Mark And Plate (German)(#28001-28741)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***00 | Plate? Safety,Inspection And Maintenance | 1 |
| 09***35 | Plate? Name,(Limited Supply) (German) | 1 |
Komatsu : D31q-16(S/N 25001-Up) : Guard : Mark And Plate (German)(#28742-)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***00 | Plate? Safety,Inspection And Maintenance | 1 |
| 09***35 | Plate? Name,(Limited Supply) (German) | 1 |
Komatsu : D31q-16(S/N 25001-Up) : Guard : Mark And Plate (Indonesian)(#25001-28000)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***35 | Plate? Name,Machine (Limited Supply) | 1 |
| 09***01 | Plate? Caution,Fuel Tank Water Drain | 1 |
Komatsu : D31q-16(S/N 25001-Up) : Guard : Mark And Plate (Spanish)(#25001-28000)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***35 | Plate? Name,Machine (Limited Supply) | 1 |
| 09***01 | Plate? Caution,Fuel Tank Water Drain | 1 |
Komatsu : D31q-16(S/N 25001-Up) : Guard : Mark And Plate (Spanish)(#28001-28741)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***00 | Plate? Safety,Inspection And Maintenance | 1 |
| 09***35 | Plate? Name,(Limited Supply) (Spanish) | 1 |
Komatsu : D31q-16(S/N 25001-Up) : Guard : Mark And Plate (Spanish)(#28742-)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***00 | Plate? Safety,Inspection And Maintenance | 1 |
| 09***35 | Plate? Name,(Limited Supply) (Spanish) | 1 |
Komatsu : D31q-16(S/N 25001-Up) : Guard : Operator'S Seat(#25001-28000)
| 01***25 | Bolt (M6-1.00x25) | 2 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 8 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 5 |
Komatsu : D31q-16(S/N 25001-Up) : Guard : Operator'S Seat(#28001-)
| 01***16 | Bolt,(For Slag Handling) | 4 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 8 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 12 |
Komatsu : D31q-16(S/N 25001-Up) : Guard : Radiator Guard And Hood
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 21 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 4 |
| 01***40 | Bolt,(Dust And Dirt Protection) | 4 |
Komatsu : D31q-16(S/N 25001-Up) : Guard : Rear Cover And Hydraulic Tank(#25001-28000)
| 01***20 | Bolt,(Large Capacity Type) (Std) | 10 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 30 |
| 01***30 | Bolt,(For France Noise Suppression) | 11 |
Komatsu : D31q-16(S/N 25001-Up) : Guard : Rear Cover And Hydraulic Tank(#28001-)
| 01***20 | Bolt,(Large Capacity Type) (Std) | 8 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 22 |
| 01***35 | Bolt,(For Pedal Steering) | 4 |
Komatsu : D31q-16(S/N 25001-Up) : Guard : Side Frame And Floor Plate(#25001-28000)
| 01***20 | Bolt,(Large Capacity Type) (Std) | 5 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 25 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 2 |
Komatsu : D31q-16(S/N 25001-Up) : Guard : Side Frame And Floor Plate(#28001-)
| 01***20 | Bolt,(Large Capacity Type) (Std) | 3 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 22 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 4 |
Optional Parts
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Battery-Large Capacity(#25001-28000)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 20 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 4 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Battery-Large Capacity(#28801-)
| 01***25 | Bolt? Wing | 1 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 1 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 1 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Bucket Indicator
| 01***09 | Nut,(With Body Positioner) | 2 |
| 01***23 | Washer | 2 |
| 11***10 | Retainer | 1 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Bucket Positioner(#25001-28000)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 8 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Bucket Positioner(#28001-)
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 6 |
| 01***25 | Bolt,Without Revolution Sensor | 2 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Canopy
| 01***25 | Bolt - Rear Guard Mounting | 8 |
| 01***30 | Bolt,Radio Controlled Slag Handling | 4 |
| 01***40 | Bolt,(For Center Guard) | 8 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Car Heater (Steel Cab)
| 01***10 | Bolt,(With Auto Emergency Steering) | 1 |
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 5 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Door And Window (L.H.) (Rops Cab)(#25001-28000)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 10 |
| 01***08 | Screw, Terminal | 1 |
| 01***12 | Screw,(For Side Lamp) (Not Shown) | 1 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Door And Window (L.H.) (Rops Cab)(#28001-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 6 |
| 01***12 | Screw,(For Side Lamp) (Not Shown) | 1 |
| 01***10 | Screw,(For Wiper Switch Earth) | 6 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Door And Window (R.H.) (Rops Cab)(#25001-28000)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 10 |
| 01***08 | Screw, Terminal | 1 |
| 01***12 | Screw,(For Side Lamp) (Not Shown) | 1 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Door And Window (R.H.) (Rops Cab)(#28001-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 6 |
| 01***12 | Screw,(For Side Lamp) (Not Shown) | 1 |
| 01***10 | Screw,(For Wiper Switch Earth) | 6 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Door And Window (Steel Cab)
| 01***12 | Screw,R.H | 2 |
| 01***16 | Screw,(With Ashtray) | 1 |
| 01***12 | Screw | 8 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Electrical System (Steel Cab)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 6 |
| 01***20 | Screw - Turn Signal And Parkinglight Mounting | 2 |
| 01***16 | Screw,(P.O.C. Model) (Except Japan) | 4 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Electrical System(#25001-28000)
| 01***16 | Bolt (Welded) | 6 |
| 01***12 | Screw,(Additional Sun Visor) | 1 |
| 01***20 | Screw - Turn Signal And Parkinglight Mounting | 2 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Electrical System(#28001-)
| 01***16 | Bolt (Welded) | 6 |
| 01***12 | Screw,(Additional Sun Visor) | 1 |
| 01***20 | Screw - Turn Signal And Parkinglight Mounting | 2 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Floor Mat (Rops Cab)(#25001-28000)
| 01***10 | Screw,(With Air Conditioner) | 17 |
| 01***19 | Washer,Spring (With Extinguisher) (D31p) | 17 |
| 08***08 | Grommet,(Without Beacon Lamp) | 1 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Floor Mat (Rops Cab)(#28001-)
| 01***16 | Screw,(P.O.C. Model) (Except Japan) | 12 |
| 01***19 | Washer,Spring (With Extinguisher) (D31p) | 10 |
| 01***19 | Washer | 2 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Front? Rear Window And Floor Mat (Steel Cab)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 7 |
| 01***16 | Screw,(P.O.C. Model) (Except Japan) | 32 |
| 01***19 | Washer,Spring (With Extinguisher) (D31p) | 39 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Front? Rear Window And Seal (Rops Cab)(#25001-28000)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 7 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 12 |
| 01***16 | Screw,(P.O.C. Model) (Except Japan) | 8 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Front? Rear Window And Seal (Rops Cab)(#28001-)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 5 |
| 01***19 | Washer,Spring (With Extinguisher) (D31p) | 5 |
| 09***28 | Strip,Weather | 2 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Head Guard(#25001-28000)
| 01***45 | Bolt,(For Slag Handling) | 8 |
| 01***55 | Bolt,(For Long Track) | 4 |
| 01***75 | Bolt,Dust | 20 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Inching Pedal (1/2) (For Brake Linkage Inching Control)(#28001-)
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***45 | Bolt, Mounting Bracket To Radiator (Top) | 1 |
| 01***07 | Nut,L.H. Thread (D31s) | 3 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Inching Pedal (2/2) (For Brake Linkage Control)(#28001-)
| 01***35 | Bolt,(For Position Fixing) | 2 |
| 01***40 | Bolt, Mount Master Brake Cylinder | 2 |
| 01***45 | Bolt,(For Power Tilt Mech Angle) | 2 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Lift Arm Positioner(#25001-28000)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 3 |
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Lift Arm Positioner(#28001-)
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 4 |
| 01***25 | Bolt,Without Revolution Sensor | 2 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Operator'S Seat? With Suspension(#25001-28000)
| 01***25 | Bolt,(For Automatic) | 2 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 8 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Operator'S Seat? With Suspension(#28001-)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 4 |
| 11***90 | Hinge (Welded) | 2 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Parking Brake Lever (For Brake Linkage Inching Control)(#28001-)
| 01***12 | Bolt, Bolt,(No Need To Quick Shift) | 3 |
| 01***30 | Bolt,(For Mechanical Governor) | 1 |
| 01***35 | Bolt,(For Position Fixing) | 1 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Perforated Engine Side Cover(#25003-)
| 11***10 | Cover,L.H | 1 |
| 11***20 | Cover,R.H | 1 |
| 13***90 | Knob | 4 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Radiator Grille? Jungle Specification(#25003-28000)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 5 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Radiator Grille? Jungle Specification(#28001-)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 12 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***45 | Bolt,(For Power Tilt Mech Angle) | 2 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Rops Cab And Mounting(#25001-28000)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***40 | Bolt,(With Center Guard) | 16 |
| 01***45 | Bolt,(For Travel Motor) (Not Show) | 12 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Rops Cab And Mounting(#28001-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***40 | Bolt,(With Center Guard) | 16 |
| 01***45 | Bolt,(For Travel Motor) (Not Show) | 18 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Rops Canopy
| 01***40 | Bolt,(For Center Guard) | 16 |
| 01***45 | Bolt,(For Slag Handling) | 18 |
| 01***65 | Bolt - Battery Box | 6 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Steel Cab And Mounting
| 01***35 | Bolt, Hydraulic Tank Mounting | 8 |
| 01***40 | Bolt,(With Center Guard) | 8 |
| 01***60 | Bolt,(For Ripper) | 8 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Steering Control Lever (1/4)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 12 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 6 |
| 01***25 | Screw | 1 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Steering Control Lever (2/4)
| 01***12 | Bolt, Bolt,(No Need To Quick Shift) | 2 |
| 01***06 | Nut? L.H. Thread,L.H. Thread (For Chinese) | 4 |
| 01***10 | Nut,(Without Air Conditioner) | 2 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Steering Control Lever (3/4)(#25001-28000)
| 01***12 | Bolt, Bolt,(No Need To Quick Shift) | 3 |
| 01***30 | Bolt,(For Mechanical Governor) | 1 |
| 01***35 | Bolt,(For Position Fixing) | 1 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Steering Control Lever (3/4)(#28001-)
| 01***12 | Bolt, Bolt,(No Need To Quick Shift) | 3 |
| 01***30 | Bolt,(For Mechanical Governor) | 1 |
| 01***35 | Bolt,(For Position Fixing) | 1 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Steering Control Lever (4/4)(#25001-28000)
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
| 07***18 | Plug,(With Extinguisher) (D31p) | 2 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Steering Control Lever (4/4)(#28001-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 8 |
| 07***18 | Plug,(With Extinguisher) (D31p) | 2 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Steering Pedal And Linkage(For Brake Linkage Inching Control(#28001-)
| 01***12 | Bolt, Bolt,(No Need To Quick Shift) | 2 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 12 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Strengthened Lower Guard(#25003-)
| 01***35 | Bolt,R.H. Outside And L.H. Inside | 18 |
| 01***42 | Washer,Spring (For Pedal Steering), Washer-Spring | 18 |
| 07***18 | Plug,(With Extinguisher) (D31p) | 6 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Swing Drawber(#25003-)
| 01***55 | Bolt, Strut Mounting - To Radiator And Rear Frame | 14 |
| 01***60 | Washer | 14 |
| 04***12 | Pin,Cotter (For Ripper) | 2 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Vandalism Protection(#25001-28000)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 1 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 3 |
Komatsu : D31q-16(S/N 25001-Up) : Optional Parts : Vandalism Protection(#28001-)
| 01***23 | Plain Washer | 1 |
| 07***20 | Cap Ass'Y,(For Vandalism Protection) | 1 |
| 09***00 | Lock,(With Vandalism Protection) | 1 |
Steering System And Final Drive
Komatsu : D31q-16(S/N 25001-Up) : Steering System And Final Drive : Bevel Gear And Shaft
| 01***16 | Bolt,(Sandy And Dusty Spec.) | 8 |
| 01***10 | Nut,(Dust?Drip Proof? Trimming S.) | 8 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 4 |
Komatsu : D31q-16(S/N 25001-Up) : Steering System And Final Drive : Brake Band
| 01***35 | Bolt,(For Pedal Steering) | 8 |
| 01***42 | Washer,Spring (For Pedal Steering) | 8 |
| 01***23 | Washer | 2 |
Komatsu : D31q-16(S/N 25001-Up) : Steering System And Final Drive : Final Drive Gear
| 01***30 | Bolt,(For France Noise Suppression) | 36 |
| 01***20 | Bolt,(Used When Towing Winch) | 4 |
| 01***08 | Screw | 8 |
Komatsu : D31q-16(S/N 25001-Up) : Steering System And Final Drive : Final Drive Housing
| 01***30 | Bolt,Radio Controlled Slag Handling | 12 |
| 01***40 | Bolt,(For Center Guard) | 36 |
| 01***70 | Bolt - Thrust Plate Mounting | 10 |
Komatsu : D31q-16(S/N 25001-Up) : Steering System And Final Drive : Parking Brake Lever(#25001-28000)
| 01***12 | Bolt,(Without R.P.C.U.) | 2 |
| 01***30 | Bolt,(Cold Terrain Spec.) | 1 |
| 01***35 | Bolt,(Without Auto Priming System) | 1 |
Komatsu : D31q-16(S/N 25001-Up) : Steering System And Final Drive : Parking Brake Lever(#28001-)
| 01***12 | Bolt,(Without R.P.C.U.) | 2 |
| 01***35 | Bolt,(Without Auto Priming System) | 2 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 4 |
Komatsu : D31q-16(S/N 25001-Up) : Steering System And Final Drive : Sprocket And Shaft
| 01***35 | Bolt - Torque Converter Totransmission Mounting | 8 |
| 01***13 | Nut - Cylinder Mounting | 24 |
| 01***36 | Washer,Radio Controlled Slag Handling | 8 |
Komatsu : D31q-16(S/N 25001-Up) : Steering System And Final Drive : Steering Case And Main Frame
| 01***20 | Bolt,(Large Capacity Type) (Std) | 8 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 30 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 38 |
Komatsu : D31q-16(S/N 25001-Up) : Steering System And Final Drive : Steering Case Cover(#25001-28000)
| 01***30 | Bolt,(Cold Terrain Spec.) | 4 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 38 |
| 01***08 | Nut, Regular Hexagon (M10-1.50) | 2 |
Komatsu : D31q-16(S/N 25001-Up) : Steering System And Final Drive : Steering Case Cover(#28001-)
| 01***30 | Bolt,(Cold Terrain Spec.) | 4 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 26 |
| 01***65 | Bolt,(For Suction Fan)(4d130-1d) | 4 |
Komatsu : D31q-16(S/N 25001-Up) : Steering System And Final Drive : Steering Clutch
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 24 |
| 01***05 | Bolt (M10-1.50x105) | 8 |
| 01***10 | Nut,(For Slag Handling) | 2 |
Komatsu : D31q-16(S/N 25001-Up) : Steering System And Final Drive : Steering Pedal And Linkage
| 01***12 | Bolt,(Without R.P.C.U.) | 2 |
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 12 |
Komatsu : D31q-16(S/N 25001-Up) : Steering System And Final Drive : Steering Valve And Piping
| 01***16 | Bolt,(Sandy And Dusty Spec.) | 3 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 10 |
| 01***30 | Bolt,(For France Noise Suppression) | 6 |
Tool And Kit
Komatsu : D31q-16(S/N 25001-Up) : Tool And Kit : Kit
| 01***12 | Washer,Holder | 1 |
| 01***20 | Nut,Shoe (Kit) | 200 |
| 04***10 | Lock,Holder | 1 |
Komatsu : D31q-16(S/N 25001-Up) : Tool And Kit : Spare Parts And Accessory Table (Except Japan)(#25001-28000)
| 04***50 | V-Belt,(For Large Pulley) | 1 |
| 07***70 | O-Ring,(For Intake Air Cover) | 1 |
| 07***22 | O-Ring,(See Fig.Y1852-01a0) | 1 |
Komatsu : D31q-16(S/N 25001-Up) : Tool And Kit : Tool(#25001-28000)
| 07***00 | Pump,Grease | 1 |
| 07***00 | Cartridge,Grease | 1 |
| 07***22 | Nozzle, Grease Pump | 1 |
Track
Komatsu : D31q-16(S/N 25001-Up) : Track : Carrier Roller
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 3 |
| 01***40 | Bolt,(Not Used With Cab) | 8 |
Komatsu : D31q-16(S/N 25001-Up) : Track : Idler
| 01***30 | Bolt,(For France Noise Suppression) | 12 |
| 01***40 | Bolt,(Dust And Dirt Protection) | 8 |
| 01***10 | Nut,(Fig.F2820-01a3-12) | 2 |
Komatsu : D31q-16(S/N 25001-Up) : Track : Recoil Spring
| 01***20 | Bolt,(Large Capacity Type) (Std) | 4 |
| 01***40 | Bolt,(For Center Guard) | 20 |
| 01***45 | Bolt,(For Slag Handling) | 20 |
Komatsu : D31q-16(S/N 25001-Up) : Track : Track Frame(#25001-28000)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 30 |
| 01***30 | Bolt,(For Center Guard) | 16 |
| 01***40 | Bolt,(For Center Guard) | 60 |
Komatsu : D31q-16(S/N 25001-Up) : Track : Track Frame(#28001-)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 8 |
| 01***30 | Bolt,(For Center Guard) | 16 |
| 01***40 | Bolt,(For Center Guard) | 52 |
Komatsu : D31q-16(S/N 25001-Up) : Track : Track Roller
| 01***30 | Bolt,(For France Noise Suppression) | 12 |
| 01***45 | Bolt,(For Slag Handling) | 40 |
| 01***50 | Bolt, Radiator To Frame | 40 |
Komatsu : D31q-16(S/N 25001-Up) : Track : Track Shoe (Lubricate Type)(#29001-)
| 01***20 | Nut,Shoe (Kit) | 280 |
| 11***10 | Shoe Bolt And Nut K.,(Except Swamp) | 1 |
| 11***11 | Bolt? Shoe,Track (Kit) | 280 |
Komatsu : D31q-16(S/N 25001-Up) : Track : Track Shoe (Master Pin Type)(#25001-29000)
| 01***20 | Nut,Shoe (Kit) | 346 |
| 11***10 | Shoe Bolt And Nut K.,(Except Swamp) | 1 |
| 11***21 | Link,Track? L.H | 74 |
Komatsu : D31q-16(S/N 25001-Up) : Track : Track Shoe (Master Pin Type)(#29001-)
| 01***20 | Nut,Shoe (Kit) | 346 |
| 11***10 | Shoe Bolt And Nut K.,(Except Swamp) | 1 |
| 11***11 | Bolt? Shoe,Track (Kit) | 346 |
Work Equipment
Komatsu : D31q-16(S/N 25001-Up) : Work Equipment : Bucket
| 01***35 | Bolt, Mounting - Flywheel Housing End | 4 |
| 01***20 | Bolt | 2 |
| 01***20 | Bolt | 2 |
Komatsu : D31q-16(S/N 25001-Up) : Work Equipment : Side Frame And Lift Arm
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 24 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 24 |
| 07***00 | Fitting, Grease - Upper Hinge Pin | 12 |
Work Equipment Control System
Komatsu : D31q-16(S/N 25001-Up) : Work Equipment Control System : Bucket Control Lever
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 4 |
| 01***30 | Bolt,(Cold Terrain Spec.) | 4 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 2 |
Komatsu : D31q-16(S/N 25001-Up) : Work Equipment Control System : Bucket Dump Cylinder
| 01***11 | Nut,(With Under Mirror) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
| 04***25 | Ring, Snap | 1 |
Komatsu : D31q-16(S/N 25001-Up) : Work Equipment Control System : Bucket Lift Cylinder
| 01***20 | Bolt,(Large Capacity Type) (Std) | 2 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 2 |
| 01***16 | Washer,(For Shipping Parts) | 2 |
Komatsu : D31q-16(S/N 25001-Up) : Work Equipment Control System : Hydraulic Control Valve (1/2)
| 01***20 | Screw | 2 |
| 01***25 | Bolt, Seal Cover Mounting | 4 |
| 01***30 | Bolt | 4 |
Komatsu : D31q-16(S/N 25001-Up) : Work Equipment Control System : Hydraulic Control Valve (2/2)(#25001-28000)
| 01***40 | Bolt,See Fig. K4010-64a0 | 2 |
| 01***05 | Nut (Welded) | 1 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 2 |
Komatsu : D31q-16(S/N 25001-Up) : Work Equipment Control System : Hydraulic Control Valve (2/2)(#28001-)
| 01***40 | Screw | 2 |
| 01***05 | Nut (Welded) | 1 |
| 07***32 | O-Ring,Drain Plug? Main Clutch | 1 |
Komatsu : D31q-16(S/N 25001-Up) : Work Equipment Control System : Hydraulic Filter And Piping(#25001-28000)
| 01***20 | Bolt,(Large Capacity Type) (Std) | 1 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 8 |
| 01***70 | Bolt, Spacer | 2 |
Komatsu : D31q-16(S/N 25001-Up) : Work Equipment Control System : Hydraulic Filter And Piping(#28001-29184)
| 01***16 | Bolt,(Sandy And Dusty Spec.) | 2 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 7 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 3 |
Komatsu : D31q-16(S/N 25001-Up) : Work Equipment Control System : Hydraulic Filter And Piping(#29185-)
| 01***20 | Bolt,(Large Capacity Type) (Std) | 7 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 3 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 10 |
Komatsu : D31q-16(S/N 25001-Up) : Work Equipment Control System : Hydraulic Oil Piping (Pump-Valve)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
| 01***30 | Bolt,(For France Noise Suppression) | 2 |
| 01***40 | Bolt,(Dust And Dirt Protection) | 4 |
Komatsu : D31q-16(S/N 25001-Up) : Work Equipment Control System : Hydraulic Oil Piping (Valve-Dump Cylinder)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 5 |
| 01***35 | Bolt,(For Pedal Steering) | 4 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 5 |
Komatsu : D31q-16(S/N 25001-Up) : Work Equipment Control System : Hydraulic Oil Piping (Valve-Lift Cylinder)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 3 |
| 01***11 | Nut,(With Under Mirror) | 8 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 3 |
Komatsu : D31q-16(S/N 25001-Up) : Work Equipment Control System : Hydraulic Pump
| 01***40 | Bolt,(Dust And Dirt Protection) | 4 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 12 |
| 04***18 | Ring, Snap | 1 |
D31Q-16(S/N 25001-UP) serial number reference
The PIN plate is located on the front frame casting, typically near the operator's left side. To read the prefix, identify the first three characters of the serial number sequence following the model designation.
| Prefix | Identifies | Notes |
|---|---|---|
| 25001-UP | D31Q-16 | Standard serial range for D3/Q-16. Engine is 4D105-3. Production years approx. 1979-1986. |
Frequently asked questions
What engine is used in the Komatsu D31Q-16?
The machine is powered by a Komatsu 4D105-3 diesel engine with a displacement of approximately 264 cu in (4.4 L).
What is the operating weight of this model?
The operating weight varies slightly by configuration but is approximately 15,543 lb (7,053 kg) to 15,550 lb (7,053.4 kg).
What model replaced the D31Q-16?
The D31Q-16 was part of a lineage that included subsequent generations like the D31Q-17 and D31Q-18.
What D31Q-16(S/N 25001-UP) owners discuss
What engine is installed in the Komatsu D31Q-16 (S/N 25001-UP)?
The machine utilizes a Komatsu 4D105-3 engine. This engine features a displacement of 4.4 L (264 cu in). Performance figures for this specific series vary by configuration: net power is rated between 61.7 hp (46 kW) and 63 hp (47 kW). The engine reaches maximum torque at 2,350 rpm.
What are the typical undercarriage and ground pressure specifications for this model?
The D31Q-16 features a track width of 600 mm (23.6 in) or 600 mm (23.63 in). The track gauge is 1,650 mm (64.97 in). Ground pressure is rated at approximately 30.4 kPa (4.41 psi), with a soil pressure specification of 0.31 kg/cm².
What are the primary fluid requirements and capacities for maintenance?
For engine lubrication, use Komatsu EO. For transmission or drive systems, use Komatsu TO (specifically TO30 is noted as a hydraulic oil specification; verify with your dealer). The cooling system fluid capacity is approximately 22 L (5.9 gal). The fuel tank capacity is 115 L (30.4 gal).
What are the known operational performance limits for the D31Q-16?
The maximum travel speed is approximately 6.5 km/h (4.04 mph) to 6.6 km/h (4.1 mph). The machine has a static tipping load of 4,359.1 kg (9,610 lb). When configured as a crawler loader, the bucket capacity is 0.8 m³ (1.1 yd³) and the breakout force for a standard bucket is 66.7 kN (14,990 lb).
What should be checked when inspecting a used D31Q-16 (S/N 25001-UP) for purchase?
Verify the serial number on the machine plate against the chassis-engered number. Check the engine block, specifically near the injection pump, for the engine serial number to confirm it matches the machine's history. Inspect the undercarriage for wear on the 5 track rollers per side and check for hydraulic leaks in the system. For machines built since 2008, compare dashboard hours against telematics reports; a gap exceeding ~50 hours is a significant rollback signal.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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