Overview
The ZF 4651.151.025 is a critical OEM genuine component engineered specifically for the WG 110 Series transmission. This part functions as a precision-machined guide or support element within the valve body or clutch assembly, ensuring accurate hydraulic fluid routing and consistent pressure regulation. The SKU 4651.151.025 is designed to maintain the tight tolerances required for smooth gear engagement and torque converter lockup in heavy-duty industrial applications. When installed alongside the 4651101013: TRANSMISSION HOUSING, it forms a sealed, high-pressure zone that prevents cross-contamination between hydraulic circuits.
Symptoms of Failure
- Delayed or harsh shifting — Worn internal surfaces cause erratic clutch pack engagement, leading to “ZF transmission shift hesitation” or “WG110 hard shifting” complaints.
- Low hydraulic pressure at idle — Internal leakage past the part reduces line pressure, resulting in “transmission slipping under load” or “no reverse engagement” scenarios.
- External oil seepage — Degraded sealing surfaces allow ATF to escape near the housing joint, commonly reported as “ZF WG110 oil leak from bell housing” or “transmission fluid drip at rear seal.”
- Abnormal whining or grinding noise — Metal-to-metal contact from a fractured component produces audible “transmission whine in neutral” or “grinding sound when accelerating.”
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4651.151.025 |
| Material | High-strength aluminum alloy with hard-anodized coating |
| Weight | 0.85 kg (1.87 lbs) |
| Outer Diameter | 68.5 mm |
| Inner Diameter | 32.0 mm |
| Height | 45.2 mm |
| OEM Reference | ZF 4651.151.025 |
| Seal Type | Integral O-ring groove (uses 0634303928: O-RING) |
Compatibility
This OEM genuine part is designed for the ZF WG 110 Series transmission family. It is also compatible with the WG 180 and WG 200 models when used in conjunction with the 4651301032: HOUSING and the 4651301033: HOUSING assembly. The part fits all WG110 variants produced after 2005, including the WG110-5 and WG110-6 speed configurations. Always verify the internal bore condition and replace the mating 0634303928: O-RING during installation to ensure a leak-free seal.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4651101013 | TRANSMISSION HOUSING | Main structural casing for gear train and valve body |
| 4651301032 | HOUSING | Intermediate housing for clutch pack support |
| 0634303928 | O-RING | Static seal between housing and valve body |
| 4651301033 | HOUSING | Rear housing for output shaft bearing support |
| 4651203002 | SCREEN SHEET | Fine mesh filter for hydraulic fluid intake |
| 4651303005 | SCREEN SHEET | Coarse debris screen for oil pump suction |
| 0636101032 | CAP SCREW | M8 x 25mm flange bolt for housing attachment |
| 0630361028 | SEALING CAP | Plastic cap for test port or vent opening |
| 4475280060 | SCREW PLUG | M12 x 1.5 hex plug for drain or pressure port |
| 0634303312 | O-RING | Secondary seal for screw plug or cap |
Frequently Asked Questions
Q: Can the ZF 4651.151.025 be reused after a transmission rebuild?
A: No. This is a wear item that should always be replaced with a new OEM genuine part during any WG110 overhaul. Reusing it risks internal leakage and premature failure of the rebuilt unit.
Q: What is the torque specification for the bolts securing this part?
A: The recommended tightening torque is 22 Nm (16 ft-lbs) for the M8 cap screws. Always use a calibrated torque wrench and apply thread locker to prevent loosening from vibration.
Q: Does this part require any special tools for installation?
A: Yes. A seal driver or press tool is recommended to avoid damaging the O-ring groove. Additionally, a depth micrometer should be used to verify the part sits flush within the housing bore.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
Request a Quote →
