Overview
The ZF 0634.304.100 O-RING for WG160/WG190/WG210 is a critical sealing component engineered to prevent fluid migration between the transmission housing and internal hydraulic circuits. As an OEM genuine part, this O-ring sits precisely within the sealing groove of the main casing assembly, ensuring a leak-proof barrier under high-pressure operating conditions. The SKU 0634.304.100 is specifically designed for the WG 160 Series, WG 190 Series, and WG 210 Series transmissions, where it interfaces directly with the 4656201075: HOUS.FRONT SECT and the 4656201035: HOUSING REAR PART to maintain system integrity.
Symptoms of Failure
- Hydraulic oil seepage at casing joints: When the 0634.304.100 O-ring hardens or cracks, you will notice visible oil weeping around the mating surfaces of the front and rear housings, often leading to low fluid levels.
- Erratic gear engagement under load: A compromised seal allows air ingress into the hydraulic control circuit, causing delayed or slipping shifts, particularly during heavy-duty operation.
- Contaminated transmission fluid: Worn O-rings permit external dirt and moisture to enter the system, resulting in dark, gritty oil that accelerates internal wear.
- Overheating due to pressure loss: Loss of sealing integrity reduces line pressure, forcing the torque converter to work harder and generating excessive heat in the WG160, WG190, or WG210 unit.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number / SKU | 0634.304.100 |
| OEM Reference | ZF 0634.304.100 |
| Material | Nitrile Butadiene Rubber (NBR) – 70 Shore A |
| Inner Diameter (approx.) | 180 mm |
| Cross-Section (approx.) | 3.5 mm |
| Weight | 0.02 kg |
| Operating Temperature Range | -40°C to +120°C |
| Compatible Fluid Types | ATF Dexron III, ZF LifeguardFluid |
Compatibility
This genuine ZF O-ring is engineered for the WG 160 Series, WG 190 Series, and WG 210 Series transmissions. It also fits the WG180 and WG200 models due to shared housing architecture. The seal works in conjunction with the 4472239178: HOUSING REAR PART and the 0631306816: CYLINDRICAL PIN to secure alignment during assembly. Always verify your transmission model code before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656201075 | HOUS.FRONT SECT | Front section housing that encloses the torque converter and pump assembly |
| 4656201035 | HOUSING REAR PART | Rear casing component that supports the output shaft and planetary gears |
| 4472239178 | HOUSING REAR PART | Alternate rear housing variant for specific WG series configurations |
| 0631306816 | CYLINDRICAL PIN | Alignment pin used to precisely locate housing sections during assembly |
| 0636100817 | CAP SCREW | Fastener securing the housing to the transmission bell housing |
| 4656301016 | SCREEN SHEET | Fine mesh filter protecting the oil pump intake from debris |
| 4656301017 | SCREEN SHEET | Secondary filter screen for the hydraulic control valve body |
| 0636100803 | CAP SCREW | Bolt used for mounting the oil pan or valve body cover |
| 0501316470 | BREATHER | Vent valve that equalizes internal pressure and prevents moisture ingress |
| 0750301003 | OIL FEED.HOUSG. | Oil supply tube that directs lubricant to the rear bearing assembly |
Frequently Asked Questions
Q: How do I know if the 0634.304.100 O-ring is the correct size for my WG210 transmission?
A: Measure the groove diameter in your housing; this O-ring has an approximate inner diameter of 180 mm and a cross-section of 3.5 mm. Always cross-reference your transmission serial number with the OEM parts catalog to confirm fitment.
Q: Can I reuse this O-ring if it appears undamaged during a rebuild?
A: No. ZF recommends replacing all O-rings, including the 0634.304.100, during any transmission overhaul. Even minor compression set can lead to premature failure and oil leaks.
Q: What other seals should I replace at the same time as this O-ring?
A: It is best practice to replace the 4656201075: HOUS.FRONT SECT gasket and the 4656201035: HOUSING REAR PART seal simultaneously to ensure complete hydraulic integrity.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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ZF 0634.304.100 O-RING – O-Ring RFQ Support
PartsZF helps B2B buyers source ZF 0634.304.100 O-RING with fast RFQ support, expert part-number lookup, documentation review, and export coordination. This O-ring page is built from confirmed catalog, media, and reference data to reduce sourcing uncertainty for construction machinery transmission parts.
Part-Number Summary
Use ZF number 0634.304.100 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Documentation reference: 4657024027
- Documentation reference: 4657024117
- Documentation reference: 4657024143
- Documentation reference: 4657054326
- Illustration section: ENGINE CONNECTION
Cross Reference Support
- Cross-reference record available for RFQ review.
Specification Snapshot
| ZF part number | 0634.304.100 |
|---|---|
| Normalized SKU | 0634304100 |
| Part name | O-RING |
| Product category | O-ring |
| Cross-reference support | Available for RFQ review |
Image and Documentation Notes
Current product media status: fallback. Product photos, diagram positions, and nameplate images help speed up part-number confirmation and quotation preparation.
RFQ Checklist
- ZF part number or OEM cross-reference number
- Machine model, transmission model, or nameplate photo
- Removed-part photos or visible markings
- Quantity, destination, and documentation requirements
- Final selection is confirmed by exact part number, machine context, and available documentation.
Related Parts
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- ZF 0734.313.134 O-RING
- ZF 0634.313.728 O-RING
