Overview
The ZF 0501.210.029 HOSE PIPE is a critical fluid transfer component engineered for the hydraulic circuits within ZF construction machinery transmissions. This OEM genuine part routes pressurized oil between the valve body and the clutch packs, ensuring precise lubrication and cooling flow. As an integral link in the transmission’s hydraulic network, the 0501.210.029 hose pipe maintains system pressure integrity and prevents contamination ingress. It is typically installed adjacent to the 2093101011 HOUSING and the 2093301027 HOUSING, forming a sealed assembly that directs oil to critical rotating components. The SKU 0501.210.029 is manufactured to ZF’s exacting tolerances, using reinforced synthetic rubber with braided textile layers to withstand high cyclic pressures and temperature extremes common in heavy-duty earthmoving equipment.
Symptoms of Failure
- Hydraulic oil leaks at transmission bell housing – Cracks or abrasion in the hose wall allow ATF to seep out, often pooling near the 0730365092 TYPE PLATE area. This is the most common failure mode for worn hose pipes.
- Erratic gear engagement or delayed shifting – A compromised hose pipe reduces clutch apply pressure, causing hesitation when shifting between forward and reverse in ZF powershift transmissions.
- Overheating transmission fluid – Restricted flow from a collapsed or kinked hose pipe starves the oil cooler, leading to elevated sump temperatures and accelerated wear on internal seals.
- Whining or cavitation noise from pump – Air ingestion through a cracked hose pipe creates aeration in the hydraulic circuit, producing a high-pitched whine under load.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 0501.210.029 |
| OEM Reference | ZF 0501.210.029 |
| Material | Reinforced synthetic rubber (NBR) with polyester braid |
| Inside Diameter | 12.7 mm (0.5 in) |
| Outside Diameter | 21.0 mm (0.83 in) |
| Overall Length | 290 mm (11.4 in) |
| Burst Pressure | 35 bar (507 psi) |
| Weight | 0.12 kg (0.26 lbs) |
| Operating Temperature Range | -40°C to +120°C (-40°F to +248°F) |
Compatibility
This hose pipe is primarily used in ZF WG180, WG200, and WG210 series powershift transmissions found in wheel loaders, dozers, and graders from manufacturers such as Caterpillar, Volvo, and Liebherr. It also fits select ZF 4WG-200 and 6WG-200 models where the hydraulic routing requires a 12.7 mm ID flexible line. Always verify the part number against your transmission’s serial number. The hose pipe interfaces directly with the 0631311009 GROOVED STUD and the 2093103025 COUNTERSHAFT assembly, making it essential to inspect these mating components during replacement.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2093101011 | HOUSING | Encloses the clutch pack and directs oil flow |
| 2093301027 | HOUSING | Rear transmission housing supporting output shaft |
| 0730365092 | TYPE PLATE | Identification plate with transmission serial number |
| 0631311009 | GROOVED STUD | Secures hose pipe to housing with O-ring seal |
| 2093301021 | GASKET | Seals housing mating surfaces against leaks |
| 0634306328 | O-RING | Provides static seal at hose pipe connections |
| 2093103025 | COUNTERSHAFT | Transfers torque between gear sets |
| 2093303040 | COUNTERSHAFT | Secondary countershaft for reverse gear |
| 2093303087 | HELICAL GEAR | Reduces noise and vibration in gear train |
| 0501007515 | SYNCHRONIZER | Matches gear speeds during shifting |
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