0189978947 Crankshaft Rear Seal. Listed in MTU 956 catalog references; confirm installation and current availability before ordering.
Check 0189978947 availability: Start with 0189978947 and the quantity. Add an engine serial number or a photo of the old Crankshaft Rear Seal if available; we will follow up on any missing details.
0189978947 Specification
About 0189978947 - Crankshaft Rear Seal
Published catalog details are identification references. They do not establish current stock, supplied condition, or confirmed fitment for your engine.
0189978947 is a crankshaft rear seal catalogued for MTU 956 engines. It is the later number for 0119973446, 0079979347, 0079977047, 0179975247 and 2 more earlier references, so lists quoting those numbers are normally supplied as 0189978947. The catalog unit weight is 0.291 kg, which we use to estimate freight before quoting.
Technical Notes: Gaskets and seals
Gaskets, O-rings, and sealing rings keep oil, coolant, fuel, charge air, and exhaust gas in their own circuits. On high-speed MTU engines they work against high combustion pressures and frequent thermal cycling, so a seal that looks intact can still have lost its elasticity or set to the shape of the old joint.
When This Type of Part Is Usually Replaced
- a joint has been opened for inspection or repair, even if the old seal looks usable
- oil or coolant weeping appears at a cover, pipe flange, or housing
- a coolant test shows oil contamination or combustion gas in the cooling system
Checks Before Ordering
- Material matters: fuel-system and coolant-system O-rings of the same size can use different elastomers
- Superseded gasket numbers often reflect a material or thickness change, so mixed old and new gaskets on one joint should be avoided
- Order the complete set for a joint rather than single pieces when the cover or head comes off
Engine Catalog References
0189978947 is listed for 8 engine models in the catalog references. The specification table decodes each model code from the fitment list; it does not confirm every installation.
| Model | Cylinders | Arrangement | Application | Group / build |
|---|---|---|---|---|
| 12V 396 TC54 | 12 | V | marine | build 4 |
| 12V 396 TC64 | 12 | V | marine | build 4 |
| 12V 396 TE64 | 12 | V | marine | build 4 |
| 12V 396 TE74 | 12 | V | marine | build 4 |
| 12V 396 TE74L | 12 | V | marine | build 4 |
| 12V 396 TE84 | 12 | V | — | build 4 |
| 12V 396 TE94 | 12 | V | marine | build 4 |
| 12V 396 TB94 | 12 | V | marine | build 4 |
How Each Model Code Reads
- 12V 396 TC54: 12 cylinders in V arrangement, Series 396, turbocharged, charge-air code TC, application group 5 (marine), build 4
- 12V 396 TC64: 12 cylinders in V arrangement, Series 396, turbocharged, charge-air code TC, application group 6 (marine), build 4
- 12V 396 TE64: 12 cylinders in V arrangement, Series 396, turbocharged, charge-air code TE, application group 6 (marine), build 4
- 12V 396 TE74: 12 cylinders in V arrangement, Series 396, turbocharged, charge-air code TE, application group 7 (marine), build 4
- 12V 396 TE74L: 12 cylinders in V arrangement, Series 396, turbocharged, charge-air code TE, application group 7 (marine), build 4, increased rating (L)
- 12V 396 TE84: 12 cylinders in V arrangement, Series 396, turbocharged, charge-air code TE, application group 8, build 4
- 12V 396 TE94: 12 cylinders in V arrangement, Series 396, turbocharged, charge-air code TE, application group 9 (marine), build 4
- 12V 396 TB94: 12 cylinders in V arrangement, Series 396, turbocharged, charge-air code TB, application group 9 (marine), build 4
Full parts list for this model family: MTU 12V 396 TB94 to TE94 Parts List
Engine-series references do not confirm every installation. Final fitment of 0189978947 depends on the full engine serial number and assembly position.
Cross-Reference and Superseded Part Numbers
Catalog history distinguishes earlier and later numbers where documented. Reference-only entries do not establish replacement direction or interchangeability. Confirm the offered number against the engine serial number and installation.
| Part number | Catalog relationship |
|---|---|
| 0119973446 | Listed earlier number |
| 0079979347 | Listed earlier number |
| 0079977047 | Listed earlier number |
| 0179975247 | Listed earlier number |
| 0109973047 | Listed earlier number |
| 0189972247 | Listed earlier number |
Common Applications
- Overhaul kits
- Marine service
- Industrial maintenance
- Generator repair
Information to Send for Quotation
- Part number: 0189978947
- Engine model, rating, and serial number
- Nameplate photo and old part photo when available
- Quantity, destination country, and required delivery date
The quotation confirms the offered part number, supply condition, price, lead time, and shipping options.
0189978947 FAQ
Is 0119973446 replaced by 0189978947?
Catalog history lists 0189978947 as the later number for 0119973446, 0079979347, 0079977047, 0179975247, 0109973047, 0189972247. Orders quoting those numbers are normally supplied as 0189978947; we confirm the change against the engine serial number, because a later number can come with related changes to mating parts.
Verification Notes
- For 0189978947, confirm engine model, serial number, required quantity, and destination before ordering.
- If 0189978947 markings or replacement status are unclear, send old-part photos or nameplate details.
Related MTU Parts
Similar to Crankshaft Rear Seal by engine series or category.
Other Service Parts in This Engine Series
Related MTU 956 service categories. Each item requires its own fitment check.