Overview
The ZF 2098.140.018 HOISTING UNIT is a precision-engineered OEM genuine component designed for the hydraulic actuation circuit within ZF heavy-duty powershift transmissions. This unit controls the lifting and lowering functions in construction machinery, translating hydraulic pressure into mechanical motion for implements and attachments. As a critical control element, it ensures smooth, responsive operation under extreme load conditions. The part number 2098.140.018 is the definitive OEM reference for this specific hoisting unit, guaranteeing exact fit and factory-specified performance. It interfaces directly with the transmission’s valve body and the 2098109043: DIFFERENTIAL to manage power distribution during hoisting cycles.
Symptoms of Failure
- Erratic or jerky hoisting motion: When the hoisting unit wears, internal spools stick, causing sudden, uncontrolled lifting or dropping of loads. This is often accompanied by a noticeable hesitation before movement begins.
- Hydraulic oil seepage around the valve body: Worn seals or a cracked housing in the 2098.140.018 unit lead to external oil leaks, visible as drips or wet spots on the transmission casing. This reduces system pressure and fluid levels.
- Load drift or inability to hold position: A failing hoisting unit allows internal bypass, causing attached loads to slowly sink or drop even when the control lever is in the neutral position. This is a critical safety concern.
- Increased cycle time for lifting operations: Reduced internal clearance or contamination within the unit restricts oil flow, making the hoisting function sluggish and significantly slower than normal operating speeds.
Technical Specifications
| Specification | Detail |
|---|---|
| OEM Part Number | 2098.140.018 |
| Component Type | Hydraulic Hoisting Unit / Control Valve |
| Material | High-strength cast iron body with hardened steel spool |
| Operating Pressure | Up to 250 bar (3,625 psi) |
| Weight (approx.) | 4.2 kg (9.3 lbs) |
| Seal Material | Nitrile rubber (NBR) with PTFE backup rings |
| Port Thread Size | G1/2” (BSPP) inlet and outlet |
Compatibility
This OEM hoisting unit is engineered for integration into the ZF WG series of powershift transmissions commonly found in wheel loaders, telehandlers, and excavators. It is specifically compatible with the ZF WG180 and ZF WG200 transmission models. It also fits select variants of the ZF WG150 and ZF WG310 series where a hydraulic hoisting function is present. For proper assembly, this unit works in conjunction with the 2098209011: BEVEL GEAR SET and the 2098209016: DIFFERENTIAL to complete the driveline. The 2095309059: DIFF.HOUSING provides the structural enclosure for these rotating components.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2098109043 | DIFFERENTIAL | Distributes torque between drive wheels |
| 2098209011 | BEVEL GEAR SET | Transfers power at a right angle from the transmission |
| 2098209016 | DIFFERENTIAL | Allows wheel speed variation during turns |
| 2095309059 | DIFF.HOUSING | Encloses and supports differential gears |
| 0631329086 | SPRING PIN | Secures linkage pins in the valve assembly |
| 0730300820 | THRUST WASHER | Reduces axial friction on rotating shafts |
| 4482360002 | AXLE BEVEL GEAR | Drives the final axle reduction set |
| 2095309081 | DIFFERENTIAL AXLE | Carries differential side gears |
| 5838300811 | THRUST WASHER | Prevents axial play in the differential |
| 4482360001 | DIFFERENTIAL BEVEL GEAR | Meshes with axle bevel gears for torque split |
