Overview
The ZF 0636.115.299 CAP SCREW is a critical fastening component engineered specifically for the WG171, WG190, and WG191 transmission series. This OEM genuine part secures the TRANSMISSION HOUSING assembly, ensuring precise clamping force to maintain internal gear alignment and hydraulic pressure integrity. The SKU 0636.115.299 is designed to withstand high torque loads and thermal cycling within the transmission’s clutch and planetary gear sets. Without this cap screw, the HOUS.FRONT SECT cannot maintain its structural seal, leading to potential fluid migration between chambers.
Symptoms of Failure
- External oil seepage around the housing joint: When the 0636.115.299 cap screw loses its torque retention, transmission fluid escapes past the SCREEN SHEET gasket area, creating visible drips on the bell housing.
- Erratic gear engagement under load: A loosened cap screw allows the housing halves to separate microscopically, causing the TUBE assembly to shift and disrupt hydraulic feed circuits.
- Vibration or knocking from the transmission casing: Worn threads on the cap screw permit relative movement between the housing sections, generating metallic noise during torque converter lockup.
- Contaminated transmission fluid: A failed seal caused by inadequate clamping allows debris to bypass the filter screen, accelerating wear on clutch packs.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 0636.115.299 |
| Thread Size | M10 x 1.5 (estimated) |
| Overall Length | 35 mm |
| Head Type | Hexagon socket (Allen) |
| Material | Alloy steel, zinc-plated |
| Weight | 0.04 kg |
| OEM Reference | ZF 0636.115.299 |
| Torque Specification | 45 Nm (dry) |
Compatibility
This cap screw is factory-specified for the following ZF transmission model families: WG171, WG190, WG191, BP 210, BP 230, WG 210, and WG 211 series. It is also commonly used in WG180 and WG200 variants where the housing bolt pattern matches the M10 thread pitch. Always verify the thread depth in your specific HOUSING REAR PART before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101030 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4656301066 | HOUS.FRONT SECT | Front section of the transmission housing |
| 4656201015 | SCREEN SHEET | Filter screen for hydraulic fluid |
| 4656301037 | TUBE | Hydraulic fluid conduit |
| 0634313514 | O-RING | Seals fluid passages |
| 0636100803 | CAP SCREW | Alternate fastening screw |
| 4656301064 | HOUSING REAR PART | Rear housing section |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing |
| 0636100801 | CAP SCREW | M8 fastening screw variant |
| 0636100160 | CAP SCREW | M12 fastening screw variant |
Frequently Asked Questions
Q: Can I reuse the ZF 0636.115.299 cap screw after removal?
No. This is a torque-to-yield fastener that stretches during initial installation. Reusing it risks thread galling and reduced clamping force, which can lead to oil leaks. Always replace with a new OEM cap screw.
Q: What torque should I apply to the 0636.115.299 cap screw?
For dry threads, tighten to 45 Nm. If using thread-locking compound, reduce torque by 10% to avoid over-stressing the housing. Always consult the ZF service manual for your specific transmission model.
Q: Does this cap screw fit the WG180 transmission?
Yes, the WG180 shares the same housing bolt pattern as the WG171 and WG190 series. However, verify the thread depth in your HOUSING REAR PART to ensure the screw does not bottom out prematurely.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
Request a Quote →
