700429178000 O-Ring. Listed in MTU 956, MTU 1163 catalog references; confirm installation and current availability before ordering.
Check 700429178000 availability: Start with 700429178000 and the quantity. Add an engine serial number or a photo of the old O-Ring if available; we will follow up on any missing details.
700429178000 Specification
About 700429178000 - O-Ring
Published catalog details are identification references. They do not establish current stock, supplied condition, or confirmed fitment for your engine.
700429178000 is an O-ring from the coolant pump group of MTU 956 and MTU 1163 engines. It is the later number for 0069974845, so lists quoting that number are normally supplied as 700429178000. The catalog unit weight is 0.012 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- Superseded gasket numbers often reflect a material or thickness change, so mixed old and new gaskets on one joint should be avoided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
700429178000 is listed for 10 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 956 TB82 | 12 | V | — | build 2 |
| 16V 956 TB82 | 16 | V | — | build 2 |
| 20V 956 TB82 | 20 | V | — | build 2 |
| 12V 956 TB92 | 12 | V | marine | build 2 |
| 16V 956 TB92 | 16 | V | marine | build 2 |
| 20V 956 TB92 | 20 | V | marine | build 2 |
| 12V 956 TB33 | 12 | V | generator sets | build 3 |
| 16V 956 TB33 | 16 | V | generator sets | build 3 |
| 20V 956 TB33 | 20 | V | generator sets | build 3 |
| 20V 956 TB34 | 20 | V | generator sets | build 4 |
How Each Model Code Reads
- 12V 956 TB82: 12 cylinders in V arrangement, Series 956, turbocharged, charge-air code TB, application group 8, build 2
- 16V 956 TB82: 16 cylinders in V arrangement, Series 956, turbocharged, charge-air code TB, application group 8, build 2
- 20V 956 TB82: 20 cylinders in V arrangement, Series 956, turbocharged, charge-air code TB, application group 8, build 2
- 12V 956 TB92: 12 cylinders in V arrangement, Series 956, turbocharged, charge-air code TB, application group 9 (marine), build 2
- 16V 956 TB92: 16 cylinders in V arrangement, Series 956, turbocharged, charge-air code TB, application group 9 (marine), build 2
- 20V 956 TB92: 20 cylinders in V arrangement, Series 956, turbocharged, charge-air code TB, application group 9 (marine), build 2
- 12V 956 TB33: 12 cylinders in V arrangement, Series 956, turbocharged, charge-air code TB, application group 3 (generator sets), build 3
- 16V 956 TB33: 16 cylinders in V arrangement, Series 956, turbocharged, charge-air code TB, application group 3 (generator sets), build 3
- 20V 956 TB33: 20 cylinders in V arrangement, Series 956, turbocharged, charge-air code TB, application group 3 (generator sets), build 3
- 20V 956 TB34: 20 cylinders in V arrangement, Series 956, turbocharged, charge-air code TB, application group 3 (generator sets), build 4
Full parts list for this model family: MTU 956 TB33 to TB92 Parts List
Engine-series references do not confirm every installation. Final fitment of 700429178000 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 |
|---|---|
| 0069974845 | Listed earlier number |
Other Parts in the Same Assembly Group
Catalog descriptions for MTU 956/1163 engines list these part numbers under the coolant pump. The grouping follows the catalog text; it is not a confirmed kit list or a drawing revision. Parts in the same group are often renewed together, but each reference still needs its own fitment check against the engine serial number.
| Part number | Description |
|---|---|
| 007603016105 | Copper Sealing Ring |
| 000910016002 | Plug |
| 000931012156 | Hex Screw |
| 5802040290 | Retainer |
| 000934012008 | Hex Nut |
| 000137012202 | Spring Washer B12 |
| 000137010202 | Spring Washer B10 |
| 000933010093 | Hex Screw |
| 700429045000 | O-Ring |
| 0002041116 | Rotary Seal |
| 5842040219 | Bearing Housing |
All assembly group on this page are collected in the assembly & BOM reference index.
Common Applications
- Overhaul kits
- Marine service
- Industrial maintenance
- Generator repair
Information to Send for Quotation
- Part number: 700429178000
- 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.
700429178000 FAQ
Is 0069974845 replaced by 700429178000?
Catalog history lists 700429178000 as the later number for 0069974845. Orders quoting that number are normally supplied as 700429178000; we confirm the change against the engine serial number, because a later number can come with related changes to mating parts.
Verification Notes
- For 700429178000, confirm engine model, serial number, required quantity, and destination before ordering.
- If 700429178000 markings or replacement status are unclear, send old-part photos or nameplate details.
Related MTU Parts
Similar to O-Ring by engine series or category.
Other Service Parts in This Engine Series
Related MTU 956, MTU 1163 service categories. Each item requires its own fitment check.