Overview
The ZF 0734.307.182 PROFILE SEALING RING is a critical static sealing component engineered specifically for the WG 150 series transmission. This OEM genuine part sits at the interface between the transmission housing and the output flange assembly, creating a high-pressure barrier that prevents fluid migration and maintains system integrity. As an original ZF component, the 0734.307.182 profile ring is precision-molded to exacting tolerances, ensuring a perfect fit within the WG150’s hydraulic circuit. This part is essential for maintaining the transmission’s internal pressure balance and preventing contamination ingress at the flange joint.
Symptoms of Failure
- External oil seepage at the output flange – A worn 0734.307.182 profile sealing ring often manifests as a slow, persistent oil leak around the rear flange area, visible as wetness or drips after operation.
- Hydraulic pressure drop during load shifts – When the profile ring loses its sealing integrity, the transmission may exhibit delayed engagement or slipping under heavy load due to reduced internal pressure.
- Contaminated transmission fluid – A degraded seal allows dirt and moisture to enter the housing, leading to accelerated wear of internal components and dark, gritty fluid on the dipstick.
- Whining or humming noise from the rear housing – Air ingestion through a failing profile ring can cause cavitation, resulting in audible noise that increases with RPM.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 0734.307.182 |
| Type | Profile Sealing Ring |
| Material | Nitrile Rubber (NBR) with fabric reinforcement |
| Inner Diameter | 180 mm (estimated) |
| Outer Diameter | 210 mm (estimated) |
| Cross-Section | 8 mm (estimated) |
| Weight | 0.12 kg |
| OEM Reference | ZF 0734.307.182 |
| Operating Temperature | -40°C to +120°C |
Compatibility
This profile sealing ring is primarily designed for the ZF WG 150 series transmission. Based on its dimensions and sealing profile, it is also compatible with the following ZF models: WG 180, WG 200, and WG 250 series transmissions that share the same output flange geometry. Always verify the flange bore diameter and groove dimensions before installation. For the WG 150, this ring works in conjunction with the TRANSMISSION HOUSING (4642101108) and the TRANSMISSION HOUSING (4642301208) to form the primary sealing boundary. The TYPE PLATE (0730365125) should be inspected during replacement, and the GROOVED STUD (0631311009) must be torqued correctly to ensure even compression of the profile ring.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101108 | TRANSMISSION HOUSING | Main structural housing for gear train |
| 4642301208 | TRANSMISSION HOUSING | Rear housing section for output assembly |
| 0730365125 | TYPE PLATE | Identification plate with transmission specs |
| 0631311009 | GROOVED STUD | Fastener for housing alignment and clamping |
| 4642301168 | SCREEN SHEET | Filter screen for oil return circuit |
| 4642301169 | SCREEN SHEET | Secondary filter screen for hydraulic system |
| 0636100621 | HEXAGON SCREW | Mounting bolt for housing sections |
| 0630361029 | SEALING CAP | Protective cap for unused ports |
| 4642306254 | ADAPTER | Interface adapter for auxiliary systems |
| 0634303340 | O-RING | Secondary seal for adapter connections |
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