Komatsu S4D155-4 Cylinder Block Parts Hub
Komatsu S4D155-4 Cylinder Block 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 S4D155-4 Cylinder Block 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.
S4D155-4 — Cylinder Block(#10287-)
| Diagram Ref. | Part Number | Description | Qty | Serial / Option Notes |
|---|---|---|---|---|
| 3 | 07043-01019 | Plug | 2 | SN: 10287-UP |
| 4 | 07043-00415 | Plug | 2 | SN: 10287-UP |
| 5 | 07046-15020 | Plug | 5 | SN: 10287-UP |
| 9 | 07040-01409 | Plug | 1 | SN: 10287-UP |
| 10 | 07003-01419 | Gasket | 1 | SN: 10287-UP |
| 11 | 04020-01024 | Dowel Pin | 4 | SN: 10287-UP |
| 17 | 04020-01842 | Dowel Pin | 2 | SN: 50220-UP |
| 17 | 04020-01842 | Dowel Pin | 1 | SN: 10287-50219 |
| 18 | 04020-00820 | Dowel Pin | 2 | SN: 10287-UP |
| 19 | 04020-00616 | Dowel Pin | 2 | SN: 10287-UP |
| 24 | 6127-21-1741 | Lock | 10 | SN: 50271-UP |
| 27 | 07000-02016 | O-Ring | 1 | SN: 10287-50174 |
| 27 | 07000-62016 | O-Ring | 1 | SN: 50175-UP |
| 30 | 07000-02016 | O-Ring | 1 | SN: 10287-50174 |
| 30 | 07000-62016 | O-Ring | 1 | SN: 50175-UP |
| 31 | 01010-30818 | Bolt | 4 | SN: 10287-UP |
| 32 | 01602-00825 | Washer | 4 | SN: 10287-UP |
| 36 | 01010-31035 | Bolt | 3 | SN: 10287-UP |
| 37 | 01650-21012 | Lock | 3 | SN: 10287-UP |
| 40 | 6127-21-2431 | Lock | 1 | SN: 10287-UP |
| 42 | 01010-31230 | Bolt | 4 | SN: 10287-UP |
| 43 | 01650-21212 | Lock | 4 | SN: 10287-UP |
| 51 | 01602-01648 | Washer | 1 | SN: 10287-50354 |
| 52 | 01582-01613 | Nut | 1 | SN: 10287-UP |
| 53 | 01010-31235 | Screw | 3 | SN: 10287-50354 |
| 54 | 01010-31240 | Bolt | 2 | SN: 50355-UP |
| 54 | 01010-31240 | Bolt | 1 | SN: 10287-50354 |
| 55 | 01602-01236 | Washer | 2 | SN: 50355-UP |
| 55 | 01602-01236 | Washer | 4 | SN: 10287-50354 |
| 58 | 01010-31025 | Bolt | 1 | SN: 10287-UP |
| 59 | 01602-01030 | Washer | 1 | SN: 10287-UP |
| 60 | 01640-21016 | Washer | 1 | SN: 10287-UP |
| 61 | 01580-01008 | Nut | 1 | SN: 10287-UP |
| 62 | 01010-31020 | Bolt | 1 | SN: 10287-UP |
| 63 | 01602-01030 | Washer | 1 | SN: 10287-UP |
| 66 | 6127-21-7401 | Cap | 1 | SN: 50279-UP |
| 67 | 6127-21-6521 | Gasket | 2 | SN: 10287-UP |
| 69 | 01602-00825 | Washer | 8 | SN: 10287-UP |
| 73 | 01602-01030 | Washer | 4 | SN: 10287-UP |
| 34A | 6127-21-2221 | O-Ring | 4 | SN: 10314-UP |
| 34A | 6127-21-2221 | O-Ring | 4 | SN: 10312-10312 |
| 34A | 6127-21-2221 | O-Ring | 4 | SN: 10287-10310 |
| 34B | 6127-21-2241 | O-Ring | 4 | SN: 10314-UP |
| 34B | 6127-21-2241 | O-Ring | 4 | SN: 10312-10312 |
| 34B | 6127-21-2241 | O-Ring | 4 | SN: 10287-10310 |
| 51A | 01641-21626 | Washer | 1 | SN: 50355-UP |
| 64A | 07042-00312 | Plug | 1 | SN: 50279-UP |
| 66A | 6128-21-7450 | Seal Ring | 1 | SN: 50279-UP |
| 72A | 01010-31030 | Bolt | 2 | SN: 50279-UP |
S4D155-4 — Cylinder Block(#10287-)
| Diagram Ref. | Part Number | Description | Qty | Serial / Option Notes |
|---|---|---|---|---|
| 3 | 07043-01019 | Plug | 2 | SN: 10287-UP |
| 4 | 07043-00415 | Plug | 2 | SN: 10287-UP |
| 5 | 07046-15020 | Plug | 5 | SN: 10287-UP |
| 9 | 07040-01409 | Plug | 1 | SN: 10287-UP |
| 10 | 07003-01419 | Gasket (K2) | 1 | SN: 10287-UP |
| 11 | 04020-01024 | Pin | 4 | SN: 10287-UP |
| 17 | 04020-01842 | Pin | 2 | SN: 50220-UP |
| 17 | 04020-01842 | Pin | 1 | SN: 10287-50219 |
| 18 | 04020-00820 | Pin | 2 | SN: 10287-UP |
| 19 | 04020-00616 | Pin | 2 | SN: 10287-UP |
| 24 | 6127-21-1741 | Washer | 10 | SN: 50271-UP |
| 27 | 07000-02016 | O-Ring (K2) | 1 | SN: 10287-50174 |
| 27 | 07000-62016 | O-Ring (K2) | 1 | SN: 50175-UP |
| 30 | 07000-02016 | O-Ring (K2) | 1 | SN: 10287-50174 |
| 30 | 07000-62016 | O-Ring (K2) | 1 | SN: 50175-UP |
| 31 | 01010-30818 | Bolt | 4 | SN: 10287-UP |
| 32 | 01602-00825 | Washer,Spring | 4 | SN: 10287-UP |
| 36 | 01010-31035 | Bolt | 3 | SN: 10287-UP |
| 37 | 01650-21012 | Washer (K2) | 3 | SN: 10287-UP |
| 40 | 6127-21-2431 | Lock (K2) | 1 | SN: 10287-UP |
| 42 | 01010-31230 | Bolt | 4 | SN: 10287-UP |
| 43 | 01650-21212 | Washer (K2) | 4 | SN: 10287-UP |
| 51 | 01602-01648 | Washer,Spring | 1 | SN: 10287-50354 |
| 52 | 01582-01613 | Nut | 1 | SN: 10287-UP |
| 53 | 01010-31235 | Bolt | 3 | SN: 10287-50354 |
| 54 | 01010-31240 | Bolt | 2 | SN: 50355-UP |
| 54 | 01010-31240 | Bolt | 1 | SN: 10287-50354 |
| 55 | 01602-01236 | Washer,Spring | 2 | SN: 50355-UP |
| 55 | 01602-01236 | Washer,Spring | 4 | SN: 10287-50354 |
| 58 | 01010-31025 | Bolt | 1 | SN: 10287-UP |
| 59 | 01602-01030 | Washer,Spring | 1 | SN: 10287-UP |
| 60 | 01640-21016 | Washer | 1 | SN: 10287-UP |
| 61 | 01580-01008 | Nut | 1 | SN: 10287-UP |
| 62 | 01010-31020 | Bolt | 1 | SN: 10287-UP |
| 63 | 01602-01030 | Washer,Spring | 1 | SN: 10287-UP |
| 66 | 6127-21-7401 | Cap | 1 | SN: 50279-UP |
| 67 | 6127-21-6521 | Gasket (K2) | 2 | SN: 10287-UP |
| 69 | 01602-00825 | Washer,Spring | 8 | SN: 10287-UP |
| 73 | 01602-01030 | Washer,Spring | 4 | SN: 10287-UP |
| 34A | 6127-21-2221 | O-Ring (K2) | 4 | SN: 10314-UP |
| 34A | 6127-21-2221 | O-Ring (K2) | 4 | SN: 10312-10312 |
| 34A | 6127-21-2221 | O-Ring (K2) | 4 | SN: 10287-10310 |
| 34B | 6127-21-2241 | O-Ring (K2) | 4 | SN: 10314-UP |
| 34B | 6127-21-2241 | O-Ring (K2) | 4 | SN: 10312-10312 |
| 34B | 6127-21-2241 | O-Ring (K2) | 4 | SN: 10287-10310 |
| 51A | 01641-21626 | Washer | 1 | SN: 50355-UP |
| 64A | 07042-00312 | Plug,(For Shipping) | 1 | SN: 50279-UP |
| 66A | 6128-21-7450 | Ring,Seal | 1 | SN: 50279-UP |
| 72A | 01010-31030 | Bolt | 2 | SN: 50279-UP |
S4D155-4 — Gear Case And Front Suppor(#10287-)
| Diagram Ref. | Part Number | Description | Qty | Serial / Option Notes |
|---|---|---|---|---|
| 2 | 04020-01434 | Pin | 2 | SN: 50220-UP |
| 2 | 04020-01434 | Pin | 1 | SN: 10287-50219 |
| 4 | 04020-00616 | Pin | 2 | SN: 10287-UP |
| 8 | 01582-01008 | Nut | 6 | SN: 10287-UP |
| 9 | 01602-01030 | Washer | 6 | SN: 10287-UP |
| 10 | 6127-21-3160 | Grommet (K2) | 2 | SN: 10287-UP |
| 14 | 01010-31025 | Bolt | 3 | SN: 10287-UP |
| 18 | 6127-21-2431 | Lock (K2) | 1 | SN: 10287-UP |
| 19 | 6127-21-3160 | Grommet (K2) | 1 | SN: 10287-UP |
| 20 | 01010-31650 | Bolt | 14 | SN: 10287-UP |
| 21 | 01010-31645 | Bolt | 1 | SN: 10287-UP |
| 22 | 01602-01648 | Washer,Spring | 15 | SN: 10287-UP |
| 24 | 6128-21-3230 | Gasket (K2) | 1 | SN: 50220-UP |
| 25 | 6127-21-3510 | Seal¤ Front (K2) | 1 | SN: 50220-UP |
| 27 | 01010-31475 | Bolt | 9 | SN: 10287-UP |
| 28 | 01010-31455 | Bolt | 4 | SN: 10287-UP |
| 29 | 01010-31480 | Bolt | 2 | SN: 10287-50337 |
| 30 | 01602-01442 | Washer,Spring | 15 | SN: 10287-UP |
| 32 | 01602-01648 | Washer,Spring | 4 | SN: 10287-UP |
| 34 | 6124-21-3240 | Gasket (K2) | 1 | SN: 10287-UP |
| 36 | 01602-01030 | Washer,Spring | 8 | SN: 10287-UP |
| 38 | 01010-30612 | Bolt | 2 | SN: 10287-UP |
| 39 | 01602-00619 | Washer,Spring | 2 | SN: 10287-UP |
| 41 | 01010-31440 | Bolt | 4 | SN: 10287-UP |
| 42 | 01602-01442 | Washer,Spring | 4 | SN: 10287-UP |
| 45 | 04020-00820 | Pin | 1 | SN: 10287-UP |
| 47 | 01010-31025 | Bolt | 6 | SN: 10287-UP |
| 51 | 6127-31-6221 | Bushing | 1 | SN: 10287-UP |
| 52 | 6127-31-6261 | Bearing,Thrust | 2 | SN: 10287-UP |
| 54 | 6127-31-6221 | Bushing | 1 | SN: 10287-UP |
| 56 | 07000-03035 | O-Ring (K2) | 1 | SN: 10287-50156 |
| 57 | 01010-31025 | Bolt | 1 | SN: 10287-50156 |
| 58 | 01602-01030 | Washer,Spring | 1 | SN: 10287-50156 |
| 30A | 01580-01411 | Nut | 1 | SN: 21776-UP |
| 39A | 01642-20608 | Washer | 2 | SN: 10287-UP |
S4D155-4 — Gear Case And Front Suppor(#10287-)
| Diagram Ref. | Part Number | Description | Qty | Serial / Option Notes |
|---|---|---|---|---|
| 2 | 04020-01434 | Pin | 2 | SN: 50220-UP |
| 2 | 04020-01434 | Pin | 1 | SN: 10287-50219 |
| 4 | 04020-00616 | Pin | 2 | SN: 10287-UP |
| 8 | 01582-01008 | Nut | 6 | SN: 10287-UP |
| 9 | 01602-01030 | Washer | 6 | SN: 10287-UP |
| 10 | 6127-21-3160 | Grommet (K2) | 2 | SN: 10287-UP |
| 14 | 01010-31025 | Bolt | 3 | SN: 10287-UP |
| 18 | 6127-21-2431 | Lock (K2) | 1 | SN: 10287-UP |
| 19 | 6127-21-3160 | Grommet (K2) | 1 | SN: 10287-UP |
| 20 | 01010-31650 | Bolt | 14 | SN: 10287-UP |
| 21 | 01010-31645 | Bolt | 1 | SN: 10287-UP |
| 22 | 01602-01648 | Washer,Spring | 15 | SN: 10287-UP |
| 24 | 6128-21-3230 | Gasket (K2) | 1 | SN: 50220-UP |
| 25 | 6127-21-3510 | Seal, Front (K2) | 1 | SN: 50220-UP |
| 27 | 01010-31475 | Bolt | 9 | SN: 10287-UP |
| 28 | 01010-31455 | Bolt | 4 | SN: 10287-UP |
| 29 | 01010-31480 | Bolt | 2 | SN: 10287-50337 |
| 30 | 01602-01442 | Washer,Spring | 15 | SN: 10287-UP |
| 32 | 01602-01648 | Washer,Spring | 4 | SN: 10287-UP |
| 34 | 6124-21-3240 | Gasket (K2) | 1 | SN: 10287-UP |
| 36 | 01602-01030 | Washer,Spring | 8 | SN: 10287-UP |
| 38 | 01010-30612 | Bolt | 2 | SN: 10287-UP |
| 39 | 01602-00619 | Washer,Spring | 2 | SN: 10287-UP |
| 41 | 01010-31440 | Bolt | 4 | SN: 10287-UP |
| 42 | 01602-01442 | Washer,Spring | 4 | SN: 10287-UP |
| 45 | 04020-00820 | Pin | 1 | SN: 10287-UP |
| 47 | 01010-31025 | Bolt | 6 | SN: 10287-UP |
| 51 | 6127-31-6221 | Bushing | 1 | SN: 10287-UP |
| 52 | 6127-31-6261 | Bearing,Thrust | 2 | SN: 10287-UP |
| 54 | 6127-31-6221 | Bushing | 1 | SN: 10287-UP |
| 56 | 07000-03035 | O-Ring (K2) | 1 | SN: 10287-50156 |
| 57 | 01010-31025 | Bolt | 1 | SN: 10287-50156 |
| 58 | 01602-01030 | Washer,Spring | 1 | SN: 10287-50156 |
| 30A | 01580-01411 | Nut | 1 | SN: 21776-UP |
| 39A | 01642-20608 | Washer | 2 | SN: 10287-UP |
S4D155-4 — Power Take Off(#10287-)
| Diagram Ref. | Part Number | Description | Qty | Serial / Option Notes |
|---|---|---|---|---|
| 2 | 07000-05165 | O-Ring | 1 | SN: 10287-UP |
| 5 | 06000-06214 | Ball Bearing | 1 | SN: 10287-UP |
| 13 | 07000-05150 | O-Ring | 1 | SN: 10287-UP |
| 14 | 01010-31030 | Bolt | 6 | SN: 10287-UP |
| 15 | 01602-01030 | Washer | 6 | SN: 10287-UP |
| 16 | 01641-21016 | Washer | 1 | SN: 10287-UP |
| 18 | 01010-31230 | Bolt | 6 | SN: 10287-UP |
| 19 | 01602-01236 | Washer | 6 | SN: 10287-UP |
| 20 | 6128-21-4321 | Idler Gear | 1 | SN: 10287-UP |
| 23 | 6128-21-4340 | Retainer | 1 | SN: 10287-UP |
| 24 | 6128-21-4600 | Shim Ass'Y | 1 | SN: 10287-UP |
| 26 | 6128-21-4360 | Lock | 1 | SN: 10287-UP |
| 28 | 07000-03095 | O-Ring | 1 | SN: 10287-UP |
| 30 | 01602-01236 | Washer | 4 | SN: 10287-UP |
| 31 | 01582-01210 | Nut | 2 | SN: 50356-UP |
| 31 | 01582-01210 | Nut | 4 | SN: 10287-50355 |
| 32 | 07000-02085 | O-Ring | 1 | SN: 10287-50278 |
| 35 | 01010-31020 | Bolt | 6 | SN: 10287-UP |
| 36 | 6127-21-4550 | Lock | 3 | SN: 10287-UP |
| 37 | 06000-06009 | Ball Bearing | 2 | SN: 10287-UP |
| 29A | 01010-31240 | Bolt | 2 | SN: 50356-UP |
S4D155-4 — Power Take Off(#10287-)
| Diagram Ref. | Part Number | Description | Qty | Serial / Option Notes |
|---|---|---|---|---|
| 2 | 07000-05165 | O-Ring (K2) | 1 | SN: 10287-UP |
| 5 | 06000-06214 | Bearing | 1 | SN: 10287-UP |
| 13 | 07000-05150 | O-Ring (K2) | 1 | SN: 10287-UP |
| 14 | 01010-31030 | Bolt | 6 | SN: 10287-UP |
| 15 | 01602-01030 | Washer,Spring | 6 | SN: 10287-UP |
| 16 | 01641-21016 | Washer | 1 | SN: 10287-UP |
| 18 | 01010-31230 | Bolt | 6 | SN: 10287-UP |
| 19 | 01602-01236 | Washer,Spring | 6 | SN: 10287-UP |
| 20 | 6128-21-4321 | Gear,Idle | 1 | SN: 10287-UP |
| 23 | 6128-21-4340 | Retainer | 1 | SN: 10287-UP |
| 24 | 6128-21-4600 | Shim Ass'Y | 1 | SN: 10287-UP |
| 26 | 6128-21-4360 | Lock (K2) | 1 | SN: 10287-UP |
| 28 | 07000-03095 | O-Ring (K2) | 1 | SN: 10287-UP |
| 30 | 01602-01236 | Washer,Spring | 4 | SN: 10287-UP |
| 31 | 01582-01210 | Nut | 2 | SN: 50356-UP |
| 31 | 01582-01210 | Nut | 4 | SN: 10287-50355 |
| 32 | 07000-02085 | O-Ring (K2) | 1 | SN: 10287-50278 |
| 35 | 01010-31020 | Bolt | 6 | SN: 10287-UP |
| 36 | 6127-21-4550 | Lock (K2) | 3 | SN: 10287-UP |
| 37 | 06000-06009 | Bearing | 2 | SN: 10287-UP |
| 29A | 01010-31240 | Bolt | 2 | SN: 50356-UP |
Shop the Komatsu S4D155-4 Cylinder Block Parts collection
S4D155-4 Cylinder Block Parts lookup notes
Use this hub when the repair has already been narrowed to cylinder block 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 Ball Bearing 06000-06009 — SKU KOM-06000-06009 | Ball Bearing
- Komatsu Engine Ball Bearing 06000-06214 — SKU KOM-06000-06214 | Ball Bearing
- Komatsu Engine Bearing Thrust 6127-31-6261 — SKU KOM-6127-31-6261 | Bearing Thrust
- Komatsu Engine Bolt 01010-30818 — SKU KOM-01010-30818 | Bolt
- Komatsu Engine Bolt 01010-31440 — SKU KOM-01010-31440 | Bolt
- Komatsu Engine Bolt 01010-31455 — SKU KOM-01010-31455 | Bolt
- Komatsu Engine Bolt 01010-31475 — SKU KOM-01010-31475 | Bolt
- Komatsu Engine Bolt 01010-31480 — SKU KOM-01010-31480 | Bolt
- Komatsu Engine Bolt 01010-31845 — SKU KOM-01010-31845 | Bolt
- Komatsu Engine Bolt 01010-31850 — SKU KOM-01010-31850 | Bolt
- Komatsu Engine Bolt 01010-61840 — SKU KOM-01010-61840 | Bolt
- Komatsu Engine Bushing 6127-31-6221 — SKU KOM-6127-31-6221 | Bushing
- Komatsu Engine Cap Oil Filler 6127-21-7401 — SKU KOM-6127-21-7401 | Cap Oil Filler
- Komatsu Engine Gasket 6124-21-3240 — SKU KOM-6124-21-3240 | Gasket
- Komatsu Engine Gasket 6127-21-5161 — SKU KOM-6127-21-5161 | Gasket
- Komatsu Engine Gasket 6128-21-3230 — SKU KOM-6128-21-3230 | Gasket
- Komatsu Engine Gasket Flywheel Housing 6127-21-4813 — SKU KOM-6127-21-4813 | Gasket Flywheel Housing
- Komatsu Engine Gasket Oil Filter 6127-21-6521 — SKU KOM-6127-21-6521 | Gasket Oil Filter
- Komatsu Engine Grommet 6127-21-3160 — SKU KOM-6127-21-3160 | Grommet
- Komatsu Engine Idler Gear 6128-21-4321 — SKU KOM-6128-21-4321 | Idler Gear
- Komatsu Engine Key 04010-10519 — SKU KOM-04010-10519 | Key
- Komatsu Engine Lock 6127-21-2431 — SKU KOM-6127-21-2431 | Lock
- Komatsu Engine Lock 6127-21-4550 — SKU KOM-6127-21-4550 | Lock
- Komatsu Engine Lock 6127-31-1350 — SKU KOM-6127-31-1350 | Lock
- Komatsu Engine Lock 6128-21-4360 — SKU KOM-6128-21-4360 | Lock
- Komatsu Engine Lock Plate 6127-21-4240 — SKU KOM-6127-21-4240 | Lock Plate
- Komatsu Engine Lock Plate 6127-21-4260 — SKU KOM-6127-21-4260 | Lock Plate
- Komatsu Engine Nut 01582-01613 — SKU KOM-01582-01613 | Nut
- Komatsu Engine O-Ring 07000-03035 — SKU KOM-07000-03035 | O-Ring
- Komatsu Engine O-Ring 07000-03095 — SKU KOM-07000-03095 | O-Ring
This hub includes 52 linked product listings. Use the collection link above to browse the full set.
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.