Overview
The ZF 4108.321.021 FILTER CARRIER is a precision-engineered component designed to securely house and position the main oil filter within ZF WG100, WG130, and WG131 transmissions. This OEM genuine part ensures that transmission fluid passes through the filtration media without bypass, maintaining hydraulic pressure integrity and protecting critical internal assemblies from particulate contamination. The SKU 4108.321.021 mounts directly to the transmission housing and interfaces with the lubrication circuit to guarantee consistent oil flow. When paired with the 4108101112 HOUSING and the 4108201177 HOUSING, this filter carrier forms a sealed filtration chamber essential for long transmission life.
Symptoms of Failure
- External oil seepage around the filter housing: A worn or cracked filter carrier allows pressurized transmission fluid to escape, leaving visible drips or wet spots on the transmission exterior. This is often the first sign of carrier degradation.
- Erratic gear engagement or delayed shifting: When the filter carrier fails to maintain proper seal integrity, hydraulic pressure drops, causing sluggish or harsh shifts, particularly under load.
- Increased transmission operating temperature: A compromised carrier can allow unfiltered oil to bypass the filter element, leading to accelerated wear and elevated fluid temperatures above normal operating ranges.
- Metallic debris in the oil pan: If the carrier cracks internally, unfiltered contaminants circulate through the valve body and clutch packs, producing visible metal particles during routine fluid changes.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4108.321.021 |
| Material | Die-cast aluminum alloy with corrosion-resistant coating |
| Weight | 0.85 kg (1.87 lbs) |
| Overall Dimensions | 145 mm x 95 mm x 75 mm |
| OEM Reference | ZF 4108.321.021 (Genuine) |
| Thread Size | M16 x 1.5 (inlet port) |
| Sealing Surface | Machined flat with O-ring groove |
| Operating Pressure | Up to 18 bar (261 psi) |
Compatibility
This filter carrier is specifically engineered for ZF WG-series powershift transmissions, including the WG100, WG130, and WG131 models. It is also compatible with certain variants of the WG180 and WG200 series where the filter housing configuration matches. For proper installation, always verify that the 0636302056 SCREW PLUG and the 4108301304 BEARING COVER are in good condition, as these components work in tandem with the carrier to maintain system pressure.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4108101112 | HOUSING | Encloses the filter carrier and directs oil flow |
| 4108201177 | HOUSING | Secondary housing for lubrication circuit |
| 0636302056 | SCREW PLUG | Seals the filter carrier access port |
| 4108301304 | BEARING COVER | Protects output shaft bearing from debris |
| 4108306173 | GASKET | Provides leak-proof seal between carrier and housing |
| 0750110040 | SHAFT SEAL | Prevents oil leakage at rotating shaft interface |
| 4108102042 | INPUT | Transmits torque from engine to transmission |
| 4108302099 | PLANET CARRIER | Holds planetary gears for torque multiplication |
| 4108302007 | BEARINGSHEET | Thrust washer for planetary gear support |
| 0635332196 | BALL BEARING | Supports rotating shafts with minimal friction |
ZF 4108.321.021 FILTER CARRIER – Filter RFQ Support
Use ZF 4108.321.021 FILTER CARRIER as the reference number when requesting filter support. PartsZF can coordinate documentation checks and export RFQ preparation.
Part-Number Summary
Use ZF number 4108.321.021 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 | 4108.321.021 |
|---|---|
| Normalized SKU | 4108321021 |
| Part name | FILTER CARRIER |
| 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.
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