Komatsu S6D125-1Z Fuel System Parts Hub
Komatsu S6D125-1Z Fuel System Parts is a focused 19PARTS hub for buyers working inside a specific Komatsu engine model and repair system. It is meant to reduce guesswork by tying engine-model navigation to related product listings and part-number references.
Diagram callout lookup for Komatsu S6D125-1Z Fuel System Parts
Use each diagram together with the table directly below it. The Diagram Ref. column corresponds to the location number shown on that specific image. Clickable part numbers link to matching 19PARTS product pages where a product match exists.
S6D125-1Z — Fuel Nozzle And Spill Tube
| Diagram Ref. | Part Number | Description | Qty | Serial / Option Notes |
|---|---|---|---|---|
| 0 | 6151-11-3101 | Nozzle Holder Ass'Y | 6 | SN: 21431-UP |
| 4 | DK150562-5000 | Spring,Nozzle | 1 | SN: 21431-UP |
| 5 | DK150530-4000 | Shim, 0.500Mm | - | SN: 21431-UP |
| 5 | DK150530-4100 | Shim, 0.525Mm | - | SN: 21431-UP |
| 5 | DK150530-4200 | Shim, 0.550Mm | - | SN: 21431-UP |
| 5 | DK150530-4300 | Shim, 0.575Mm | - | SN: 21431-UP |
| 5 | DK150530-4400 | Shim, 0.600Mm | - | SN: 21431-UP |
| 5 | DK150530-4500 | Shim, 0.625Mm | - | SN: 21431-UP |
| 5 | DK150530-4600 | Shim, 0.650Mm | - | SN: 21431-UP |
| 5 | DK150530-4700 | Shim, 0.675Mm | - | SN: 21431-UP |
| 5 | DK150530-4800 | Shim, 0.700Mm | - | SN: 21431-UP |
| 5 | DK150530-4900 | Shim, 0.725Mm | - | SN: 21431-UP |
| 5 | DK150530-5000 | Shim, 0.750Mm | - | SN: 21431-UP |
| 5 | DK150530-5100 | Shim, 0.775Mm | - | SN: 21431-UP |
| 5 | DK150530-5200 | Shim, 0.800Mm | - | SN: 21431-UP |
| 5 | DK150530-5300 | Shim, 0.825Mm | - | SN: 21431-UP |
| 5 | DK150530-5400 | Shim, 0.850Mm | - | SN: 21431-UP |
| 5 | DK150530-5600 | Shim, 0.900Mm | - | SN: 21431-UP |
| 5 | DK150530-5700 | Shim, 0.925Mm | - | SN: 21431-UP |
| 5 | DK150530-5800 | Shim, 0.950Mm | - | SN: 21431-UP |
| 5 | DK150530-5900 | Shim, 0.975Mm | - | SN: 21431-UP |
| 5 | DK150530-6000 | Shim, 1.000Mm | - | SN: 21431-UP |
| 5 | DK150530-6100 | Shim, 1.025Mm | - | SN: 21431-UP |
| 5 | DK150530-6200 | Shim, 1.050Mm | - | SN: 21431-UP |
| 5 | DK150530-6300 | Shim, 1.075Mm | - | SN: 21431-UP |
| 5 | DK150530-6400 | Shim, 1.100Mm | - | SN: 21431-UP |
| 5 | DK150530-6500 | Shim, 1.125Mm | - | SN: 21431-UP |
| 5 | DK150530-6600 | Shim, 1.150Mm | - | SN: 21431-UP |
| 5 | DK150530-6700 | Shim, 1.175Mm | - | SN: 21431-UP |
| 5 | DK150530-6800 | Shim, 1.200Mm | - | SN: 21431-UP |
| 5 | DK150530-6900 | Shim, 1.225Mm | - | SN: 21431-UP |
| 5 | DK150530-7000 | Shim, 1.250Mm | - | SN: 21431-UP |
| 5 | DK150530-7100 | Shim, 1.275Mm | - | SN: 21431-UP |
| 5 | DK150530-7200 | Shim, 1.300Mm | - | SN: 21431-UP |
| 5 | DK150530-7300 | Shim, 1.325Mm | - | SN: 21431-UP |
| 5 | DK150530-7400 | Shim, 1.350Mm | - | SN: 21431-UP |
| 5 | DK150530-7500 | Shim, 1.375Mm | - | SN: 21431-UP |
| 5 | DK150530-7600 | Shim, 1.400Mm | - | SN: 21431-UP |
| 5 | DK150530-7700 | Shim, 1.425Mm | - | SN: 21431-UP |
| 5 | DK150530-7800 | Shim, 1.450Mm | - | SN: 21431-UP |
| 5 | DK150530-7900 | Shim, 1.475Mm | - | SN: 21431-UP |
| 5 | DK150530-8000 | Shim, 1.500Mm | - | SN: 21431-UP |
| 8 | DK029300-5070 | Gasket | 1 | SN: 21431-UP |
| 10 | 6127-11-3152 | Bolt,Joint | 1 | SN: 21431-UP |
| 11 | 07005-00812 | Gasket (K1) | 2 | SN: 21431-UP |
| 12 | 6151-11-3121 | Nozzle | 1 | SN: 21431-UP |
| 14 | 07000-65065 | O-Ring (K1) | 6 | SN: 21431-UP |
| 16 | 07005-01012 | Gasket (K1) | 12 | SN: 21431-UP |
| 18 | 07285-00085 | Clip | 1 | SN: 21431-UP |
S6D125-1Z — Fuel Injection Pump (Pump) (Inner Parts)(#23333-38629)
| Diagram Ref. | Part Number | Description | Qty | Serial / Option Notes |
|---|---|---|---|---|
| 5 | DK134143-5920 | Plunger Ass'Y | 6 | SN: 23333-38629 |
| 6 | DK134151-2220 | Plunger Ass'Y | 1 | SN: 23333-38629 |
| 8 | DK134116-4720 | Holder | 1 | SN: 23333-38629 |
| 9 | DK029632-2070 | O-Ring | 1 | SN: 23333-38629 |
| 11 | DK134112-2000 | Spring | 1 | SN: 23333-38629 |
| 12 | DK134115-0100 | Gasket | 1 | SN: 23333-38629 |
| 13 | DK029302-0140 | Washer | 1 | SN: 23333-38629 |
| 15 | DK029602-0010 | Ring,Snap | 1 | SN: 23333-38629 |
| 16 | DK029632-9030 | O-Ring | 1 | SN: 23333-38629 |
| 17 | DK029631-5020 | O-Ring | 1 | SN: 23333-38629 |
| 18 | DK029631-5020 | O-Ring | 1 | SN: 23333-38629 |
| 19 | DK139400-0900 | Shim, 0.500Mm | - | SN: 23333-38629 |
| 19 | DK139400-1000 | Shim, 0.525Mm | - | SN: 23333-38629 |
| 19 | DK139400-1100 | Shim, 0.550Mm | - | SN: 23333-38629 |
| 19 | DK139400-2100 | Shim, 0.800Mm | - | SN: 23333-38629 |
| 19 | DK139400-2900 | Shim, 1.000Mm | - | SN: 23333-38629 |
| 26 | DK134241-0021 | Sleeve,Control | 6 | SN: 23333-38629 |
| 27 | DK134216-0000 | Seat,Spring | 6 | SN: 23333-38629 |
| 30 | DK134200-0020 | Tappet Ass'Y | 6 | SN: 23333-38629 |
| 31 | DK016650-2230 | Bearing | 1 | SN: 23333-38629 |
| 37 | DK016650-2230 | Bearing | 1 | SN: 23333-38629 |
| 39 | DK139629-0000 | Seal,Oil | 1 | SN: 23333-38629 |
| 41 | DK029635-5010 | O-Ring | 1 | SN: 23333-38629 |
| 42 | DK134563-0900 | Sleeve | 1 | SN: 23333-38629 |
| 47 | DK026524-2940 | Gasket | 1 | SN: 23333-38629 |
S6D125-1Z — Fuel Injection Pump And Piping
| Diagram Ref. | Part Number | Description | Qty | Serial / Option Notes |
|---|---|---|---|---|
| 3 | 04020-01024 | Pin,Dowel | 2 | SN: 21431-UP |
| 4 | 01010-51075 | Bolt | 2 | SN: 21431-UP |
| 6 | 01641-21016 | Washer | 4 | SN: 21431-UP |
| 8 | 01643-31032 | Washer | 4 | SN: 21431-UP |
| 10 | 6151-81-3112 | Air Compressor A.,(See Fig.0711A) | 1 | SN: 43707-UP |
| 10 | The part specified in the line above can be used instead of this part6151-81-3110 | Air Compressor A.,(See Fig.0711) | 1 | SN: 21431-41874 |
| 10 | The part specified in the line above can be used instead of this part6151-81-3111 | Air Compressor A.,(See Fig.0711A) | 1 | SN: 41875-43706 |
| 13 | 04010-00519 | Key | 1 | SN: 21431-UP |
| 16 | 07000-02125 | O-Ring (K8) | 1 | SN: 21431-UP |
| 18 | 01640-21016 | Washer | 4 | SN: 21431-UP |
| 19 | 6151-71-5110 | Tube,Injection, No.1 | 1 | SN: 21431-UP |
| 20 | 6151-71-5120 | Tube,Injection, No.2 | 1 | SN: 21431-UP |
| 21 | 6151-71-5130 | Tube,Injection, No.3 | 1 | SN: 21431-UP |
| 22 | 6151-71-5140 | Tube,Injection, No.4 | 1 | SN: 21431-UP |
| 23 | 6151-71-5150 | Tube,Injection, No.5 | 1 | SN: 21431-UP |
| 24 | 6151-71-5160 | Tube,Injection, No.6 | 1 | SN: 21431-UP |
| 30 | 01010-50630 | Bolt | 4 | SN: 21431-UP |
| 33 | 07206-30710 | Bolt,Joint | 1 | SN: 21431-UP |
| 34 | 07005-01012 | Gasket (K2) | 2 | SN: 21431-UP |
| 35 | 6151-71-5710 | Tube | 1 | SN: 21431-UP |
| 37 | 07005-01412 | Gasket (K2) | 2 | SN: 21431-UP |
S6D125-1Z — 2) (Inner Parts)(#38630-)
| Diagram Ref. | Part Number | Description | Qty | Serial / Option Notes |
|---|---|---|---|---|
| 2 | DK134151-2220 | Plunger Ass'Y | 1 | SN: 38630-UP |
| 4 | DK134116-4720 | Holder | 1 | SN: 38630-UP |
| 5 | DK029632-2070 | O-Ring | 1 | SN: 38630-UP |
| 5 | DK134143-5920 | Plunger Ass'Y | 6 | SN: 38630-UP |
| 7 | DK134112-2000 | Spring | 1 | SN: 38630-UP |
| 8 | DK134115-0100 | Gasket | 1 | SN: 38630-UP |
| 9 | DK029302-0140 | Washer | 1 | SN: 38630-UP |
| 11 | DK029602-0010 | Ring,Snap | 1 | SN: 38630-UP |
| 13 | DK029632-9030 | O-Ring | 1 | SN: 38630-UP |
| 14 | DK029631-5020 | O-Ring | 1 | SN: 38630-UP |
| 15 | DK029631-5020 | O-Ring | 1 | SN: 38630-UP |
| 16 | DK139400-0900 | Shim, 0.500Mm | - | SN: 38630-UP |
| 16 | DK139400-1000 | Shim, 0.525Mm | - | SN: 38630-UP |
| 16 | DK139400-1100 | Shim, 0.550Mm | - | SN: 38630-UP |
| 16 | DK139400-2100 | Shim, 0.800Mm | - | SN: 38630-UP |
| 16 | DK139400-2900 | Shim, 1.000Mm | - | SN: 38630-UP |
| 23 | DK134241-0021 | Sleeve | 6 | SN: 38630-UP |
| 24 | DK134216-0000 | Seat,Spring | 6 | SN: 38630-UP |
| 27 | DK134200-0020 | Tappet Ass'Y | 6 | SN: 38630-UP |
S6D125-1Z — Water Separator And Piping
| Diagram Ref. | Part Number | Description | Qty | Serial / Option Notes |
|---|---|---|---|---|
| 0 | 600-311-9731 | Water Separator A. | 1 | SN: 21431-UP |
| 3 | 07005-00812 | Gasket | 1 | SN: 26750-UP |
| 3 | 07005-00812 | Gasket (K2) | 1 | SN: 21431-26749 |
| 7 | 600-311-9890 | O-Ring | 1 | SN: 26750-UP |
| 7 | 600-311-9890 | O-Ring (K2) | 1 | SN: 21431-26749 |
| 14 | 01010-31035 | Bolt | 6 | SN: 21431-UP |
| 16 | 6141-71-1710 | Joint | 1 | SN: 21431-UP |
| 20 | 07005-01412 | Gasket (K2) | 8 | SN: 21431-UP |
| 21 | 08034-00519 | Band | 1 | SN: 21431-UP |
| 22 | 01010-31030 | Bolt | 4 | SN: 21431-UP |
S6D125-1Z — Fuel Filter And Piping
| Diagram Ref. | Part Number | Description | Qty | Serial / Option Notes |
|---|---|---|---|---|
| 3 | 07005-00812 | Gasket | 1 | SN: 21431-UP |
| 4 | 600-311-8291 | Cartridge | 1 | SN: 21431-UP |
| 6 | 07005-00812 | Gasket | 1 | SN: 21431-UP |
| 8 | 01010-51075 | Bolt | 2 | SN: 21431-UP |
| 9 | 01640-21016 | Washer | 2 | SN: 21431-UP |
| 13 | 07005-01412 | Gasket (K2) | 4 | SN: 21431-UP |
| 14 | 08034-00519 | Band | 2 | SN: 21431-UP |
Shop the Komatsu S6D125-1Z Fuel System Parts collection
S6D125-1Z Fuel System Parts lookup notes
Use this hub when the repair has already been narrowed to fuel system parts. Confirm each part against the engine serial range, parts-book callout, quantity, and option notes before ordering.
Related parent hubs
Featured parts in this hub
- Komatsu Engine Air Compressor Ass'Y 6151-81-3112 — SKU KOM-6151-81-3112 | Product code 6151-81-3110 | Air Compressor Ass'Y
- Komatsu Engine Bolt 01010-50625 — SKU KOM-01010-50625 | Bolt
- Komatsu Engine Cartridge 600-311-9120 — SKU KOM-600-311-9120 | Cartridge
- Komatsu Engine Cushion 424-43-11240 — SKU KOM-424-43-11240 | Cushion
- Komatsu Engine Feed Pump Ass'Y DK105217-1480 — SKU KOM-DK105217-1480 | Product code Dk105217-1480 | Feed Pump Ass'Y
- Komatsu Engine Motor Ass'Y Engine Stop 600-815-6650 — SKU KOM-600-815-6650 | Motor Ass'Y Engine Stop
- Komatsu Engine Nozzle 6151-11-3121 — SKU KOM-6151-11-3121 | Nozzle
- Komatsu Engine Nozzle Holder Ass'Y 6151-11-3101 — SKU KOM-6151-11-3101 | Nozzle Holder Ass'Y
- Komatsu Engine Nut 426-09-11130 — SKU KOM-426-09-11130 | Nut
- Komatsu Engine O-Ring Injection Drive Case 07000-02125 — SKU KOM-07000-02125 | O-Ring Injection Drive Case
- Komatsu Engine Plate DK156605-6020 — SKU KOM-DK156605-6020 | Product code Dk156605-6020 | Plate
- Komatsu Engine Plunger Ass'Y DK134143-5920 — SKU KOM-DK134143-5920 | Product code Dk134143-5920 | Plunger Ass'Y
- Komatsu Engine Plunger Ass'Y DK134151-2220 — SKU KOM-DK134151-2220 | Product code Dk134151-2220 | Plunger Ass'Y
Parts-book verification before ordering
Komatsu engine parts often change by engine arrangement, serial range, diagram callout, and option note. 19PARTS uses engine-model organization to help you move from a broad Komatsu part number search into a tighter reference path, but final fitment should always be confirmed against your engine serial number and parts book.
Our Keep Ops Moving approach is simple: give buyers cleaner lookup paths, clear part-number references, and practical cross-navigation so rebuild shops, fleet teams, mechanics, and equipment owners can identify the right components faster.