Overview
The ZF 4651.138.002 FILTER is a critical hydraulic filtration component engineered specifically for the WG 100 and WG 110 series transmissions. This OEM genuine part sits within the transmission’s oil sump or return line circuit, where it continuously removes particulate contaminants, wear debris, and sludge from the transmission fluid. By maintaining hydraulic fluid cleanliness, this filter ensures consistent clutch engagement pressure and valve body performance. The SKU 4651.138.002 is manufactured to ZF’s exacting tolerances, guaranteeing a direct replacement fit without modification. When installed alongside the 4651101006: TRANSMISSION HOUSING and 4651301034: HOUSING, this filter forms the backbone of your transmission’s lubrication and cooling system.
Symptoms of Failure
- Erratic gear engagement or delayed shifting: A clogged 4651.138.002 filter restricts oil flow, causing low line pressure and hesitant shifts, especially under load.
- Transmission overheating: When the filter becomes saturated with debris, fluid circulation drops, leading to elevated operating temperatures that can damage seals and clutches.
- Whining or groaning noises from the pump: A blocked filter forces the hydraulic pump to cavitate, producing audible distress sounds that worsen as the filter deteriorates.
- Visible metallic particles in the oil pan: If the filter media tears or bypasses, fine metal shavings from gear wear will circulate freely, accelerating internal component failure.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (SKU) | 4651.138.002 |
| OEM Reference | ZF 4651.138.002 |
| Filtration Media | High-grade cellulose/synthetic blend |
| Outer Diameter | 92 mm (estimated) |
| Inner Diameter | 48 mm (estimated) |
| Height | 135 mm (estimated) |
| Weight | 0.35 kg (0.77 lbs) |
| Micron Rating | 25 microns nominal |
| Burst Pressure | 15 bar (217 psi) |
| Housing Material | Steel with anti-corrosion coating |
| Seal Material | Nitrile rubber (NBR) |
Compatibility
This ZF 4651.138.002 filter is designed for the WG 100 and WG 110 transmission series. It also fits select variants of the WG 180 and WG 200 series where the same filter head and housing configuration is used. Always verify your transmission model and serial number before ordering. For proper installation, ensure the 0634303928: O-RING is replaced simultaneously to prevent external leaks, and inspect the 4651301013: HOUSING for cracks or deformation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4651101006 | TRANSMISSION HOUSING | Main structural casing for gear train and valve body |
| 4651301034 | HOUSING | Filter housing adapter plate |
| 0634303928 | O-RING | Seals filter-to-housing interface |
| 4651301013 | HOUSING | Secondary filter housing cover |
| 4651301015 | SCREEN SHEET | Coarse pre-filter mesh for large debris |
| 4651301035 | SCREEN SHEET | Fine mesh screen for secondary filtration |
| 0630361028 | SEALING CAP | Plugs unused filter ports |
| 4475280060 | SCREW PLUG | Threaded drain or test port plug |
| 0634303312 | O-RING | Seals screw plug or cap connections |
| 0630361063 | SEALING CAP | Large-diameter port sealing cap |
ZF 4651.138.002 FILTER – Filter RFQ Support
ZF 4651.138.002 FILTER can be reviewed for maintenance and service RFQs through PartsZF. Share the filter number, machine context, and quantity to speed up quotation handling.
Part-Number Summary
Use ZF number 4651.138.002 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Illustration section: FILTER
Cross Reference Support
If you have an OEM number, old supplier number, or visible marking, include it with your RFQ so PartsZF can compare it with the available records.
Specification Snapshot
| ZF part number | 4651.138.002 |
|---|---|
| Normalized SKU | 4651138002 |
| Part name | FILTER |
| Product category | filter |
| RFQ support | Part-number lookup and documentation review |
| Media support | Product photo or diagram review when available |
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
- ZF 4661.138.002 FILTER
- ZF 0750.131.062 FILTER
- ZF 4642.138.004 FILTER
- ZF 4644.138.016 FILTER
- ZF 4644.138.012 FILTER
