Overview
The ZF 0735.302.596 RUNNING DISK is a critical friction component engineered for the WG190 and WG210 series transmissions. This OEM genuine part functions as a load-bearing interface within the clutch pack assembly, managing torque transfer and heat dissipation during gear shifts. Positioned between steel separator plates, the running disk ensures smooth engagement and disengagement of planetary gear sets. The SKU 0735.302.596 is precision-machined to factory tolerances, guaranteeing consistent hydraulic pressure distribution across the clutch drum. Without this disk, the transmission cannot maintain proper clamping force, leading to inefficient power delivery. It works in concert with the TRANSMISSION HOUSING to contain lubrication flow and align rotating assemblies.
Symptoms of Failure
- Delayed or harsh gear engagement: A worn running disk causes clutch pack slippage, resulting in noticeable hesitation when shifting from Neutral to Drive or Reverse.
- Transmission overheating: Excessive friction from a glazed or warped disk generates abnormal heat, often detected by burnt transmission fluid odor or dashboard temperature warnings.
- Intermittent loss of power under load: When the disk fails to maintain friction, the transmission may momentarily lose torque during uphill climbs or heavy hauling, particularly in WG210 applications.
- Metallic debris in the oil pan: Flaking friction material from a degraded running disk contaminates the hydraulic system, accelerating wear on the HOUS.FRONT SECT and valve body components.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0735.302.596 |
| Outer Diameter | 195 mm (estimated) |
| Inner Diameter | 135 mm (estimated) |
| Thickness | 2.5 mm (new) |
| Material | High-carbon steel with sintered bronze friction lining |
| Weight | 0.45 kg |
| OEM Reference | ZF 0735.302.596 |
| Torque Capacity | 450 Nm (estimated per disk) |
Compatibility
This running disk is primarily designed for ZF WG190 and WG210 series transmissions, which are common in medium-duty trucks, buses, and off-highway equipment. It also fits WG180 and WG200 models where clutch pack dimensions match. The part interfaces directly with the HOUSING REAR PART and the HOUSING REAR SECTION to complete the clutch drum assembly. Always verify spline count and inner diameter against your transmission’s service manual before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101088 | TRANSMISSION HOUSING | Encloses gear train and supports bearing journals |
| 4657201183 | HOUS.FRONT SECT | Front section housing for input shaft and pump |
| 4657201184 | HOUSING REAR PART | Rear housing segment for output shaft support |
| 4657298111 | HOUSING REAR SECTION | Additional rear housing section for PTO adapters |
| 0631306816 | CYLINDRICAL PIN | Aligns housing halves during assembly |
| 0636100801 | CAP SCREW | Secures housing flanges with M10 thread |
| 4681301015 | FIXING PLATE | Retains running disk stack in clutch drum |
| 4681301016 | SCREEN SHEET | Filters debris from clutch pack oil flow |
| 4681301017 | SCREEN SHEET | Secondary filtration for high-pressure circuits |
| 0636100803 | CAP SCREW | M12 fastener for heavy-duty housing joints |
Frequently Asked Questions
Q: Can I reuse the old running disk if it looks clean?
A: No. Friction disks wear microscopically even without visible damage. Reusing a disk risks uneven clamping force and premature failure of the entire clutch pack. Always replace with OEM part 0735.302.596.
Q: How many running disks are in a WG190 clutch pack?
A: Typically 5 to 7 disks are used per clutch assembly, depending on the specific gear set. Always count and replace all disks in the same pack to maintain balanced hydraulic pressure.
Q: Does this part require special installation tools?
A: Yes. A clutch disk alignment tool is recommended to center the splines. Additionally, verify that the FIXING PLATE is torqued to factory specifications to prevent axial play.
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Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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