Overview
The ZF 4644.231.098 OIL DIPSTICK is a precision-engineered component designed exclusively for the WG200 series powershift transmissions. This OEM genuine part provides a sealed access point for fluid level verification, ensuring the transmission maintains optimal hydraulic pressure and lubrication. Mounted directly into the transmission housing, the dipstick allows operators to quickly assess oil condition without disassembling any external covers. The SKU 4644.231.098 is manufactured to ZF’s exacting tolerances, featuring a calibrated measurement rod that delivers accurate readings even under high-vibration conditions common in construction and agricultural machinery.
Symptoms of Failure
- Oil leaks around the dipstick tube: A worn or cracked dipstick seal allows transmission fluid to escape, leading to low oil levels and potential gear slipping during operation.
- Inaccurate fluid level readings: When the dipstick’s measurement markings fade or the rod becomes bent, operators cannot reliably assess oil volume, risking overfill or underfill conditions.
- Contaminated fluid ingress: A broken dipstick cap or degraded O-ring permits dirt and moisture to enter the transmission, accelerating wear on internal components like the 4644105417 DISCONNECTION assembly.
- Increased transmission noise: Insufficient lubrication from undetected low oil levels causes whining or grinding sounds, particularly during load shifts.
Technical Specifications
| Parameter | Value |
|---|---|
| Overall Length | 385 mm |
| Rod Diameter | 6.0 mm |
| Handle Material | Glass-filled nylon |
| Rod Material | Stainless steel |
| Seal Type | Nitrile rubber O-ring |
| Weight | 0.12 kg |
| OEM Reference | 4644.231.098 |
| Torque Specification | 8 Nm (cap) |
Compatibility
This dipstick is specifically engineered for the ZF WG200 series transmission family. It is directly compatible with WG180, WG200, and WG210 models used in off-highway vehicles such as wheel loaders, dump trucks, and forklifts. The part also fits select WG150 variants when paired with the correct 4644303547 OUTPUT FLANGE or 4644303012 OUTPUT FLANGE. For proper installation, ensure the transmission housing bore is clean; the dipstick interfaces directly with the 4644101121 TRANSMISSION HOUSING casting.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644105417 | DISCONNECTION | Clutch pack disconnection valve |
| 4644303547 | OUTPUT FLANGE | Driveshaft coupling flange |
| 4644303012 | OUTPUT FLANGE | Alternate output flange variant |
| 4644101121 | TRANSMISSION HOUSING | Main structural casing |
| 4644301240 | TRANSMISSION HOUSING | Secondary housing casting |
| 0730365067 | TYPE PLATE | Identification and rating plate |
| 0631311009 | GROOVED STUD | Threaded mounting fastener |
| 4644301286 | COVER PLATE | Access port cover |
| 4644301242 | COVER SHEET | Protective sheet metal cover |
| 0636101026 | CAP SCREW | Hex head fastening bolt |
