Overview
The ZF 0501.340.572 NON-RETURN VALVE is a critical hydraulic component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part ensures one-way fluid flow within the valve body, maintaining precise clutch and brake application pressure. By preventing backflow, the valve stabilizes hydraulic circuits during gear shifts, protecting sensitive components like the 2093109029 DIFFERENTIAL from pressure spikes. The SKU 0501.340.572 is machined to exact ZF tolerances, guaranteeing a direct replacement without modification.
Symptoms of Failure
- Delayed or harsh shifting: A worn non-return valve allows hydraulic fluid to bleed backward, causing soft engagement or jarring gear changes, especially in WG130 transmissions.
- Intermittent loss of drive: When the valve fails to seal, pressure drops in the forward clutch circuit, leading to temporary power loss under load.
- Erratic torque converter lockup: Backflow through the valve disrupts converter clutch control, producing shudder or RPM flare at highway speeds.
- Internal oil contamination: Degraded valve seats generate metallic debris that circulates through the system, accelerating wear on the 0750117075 TAPER ROLLER BEARING and other rotating assemblies.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0501.340.572 |
| Type | Spring-loaded poppet check valve |
| Body Material | Hardened steel with zinc-nickel plating |
| Seal Material | Nitrile rubber (NBR) O-ring |
| Overall Length | 42.5 mm |
| Thread Size | M14 x 1.5 |
| Cracking Pressure | 0.35 bar (5 psi) |
| Weight | 0.045 kg |
| OEM Reference | ZF 0501.340.572 |
Compatibility
This non-return valve is specifically designed for ZF WG-series powershift transmissions. Verified applications include:
- ZF WG100 (all variants)
- ZF WG130 (including WG131)
- ZF WG180 (hydraulic control block)
- ZF WG200 (valve body retrofit)
It is also compatible with the 2093209094 DIFFERENTIAL assembly and the 2093309078 DIFF.HOUSING used in these drivelines. Always verify your transmission serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2093109029 | DIFFERENTIAL | Distributes torque between axles |
| 0750117075 | TAPER ROLLER BEARING | Supports rotating differential gears |
| 2093209094 | DIFFERENTIAL | Secondary torque distribution unit |
| 2093309078 | DIFF.HOUSING | Encloses differential gear set |
| 0631100223 | SPRING PIN | Secures valve components |
| 0730300820 | THRUST WASHER | Reduces axial friction |
| 4482360002 | AXLE BEVEL GEAR | Transfers power to wheel axles |
| 2097309085 | DIFFERENTIAL AXLE | Connects differential to wheel hub |
| 5838300811 | THRUST WASHER | Prevents gear end-play |
| 4482360001 | DIFFERENTIAL BEVEL GEAR | Primary gear in differential set |
Frequently Asked Questions
Q: Can I install the 0501.340.572 valve without removing the transmission?
A: Yes, this valve is externally accessible on the WG100/WG130 valve body. Drain the transmission fluid, remove the old valve with a 14mm socket, and replace the O-ring before installing the new unit.
Q: Will a failing non-return valve cause damage to the differential?
A: Absolutely. Uncontrolled pressure fluctuations can shock-load the 2093109029 DIFFERENTIAL and its bearings. Replace the valve immediately if you notice erratic shifting.
Q: Is this part interchangeable with ZF 0501.340.573?
A: No. The 0501.340.572 has a higher cracking pressure (0.35 bar vs. 0.25 bar) and uses a different spring rate. Using the wrong valve will cause clutch slip.
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Phone: +86 158 2286 3467 |
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