Overview
The ZF 4108.111.061 Power Take-Off (PTO) is a critical auxiliary drive unit engineered for seamless integration within ZF construction machinery transmissions. This OEM genuine part transfers engine torque to hydraulic pumps, enabling the operation of auxiliary systems such as dump bodies, winches, or concrete mixers. Positioned on the transmission housing, the PTO engages directly with the gear train to provide reliable power output. The SKU 4108.111.061 identifies this specific assembly, which is precision-machined to maintain exacting OEM tolerances for long service life in demanding off-highway environments.
Symptoms of Failure
- Hydraulic pump hesitation or intermittent power loss — When the PTO gear teeth wear or the clutch mechanism slips, you may notice delayed or inconsistent pump engagement, especially under load. This often manifests as a “PTO not engaging smoothly” complaint.
- Oil seepage around the PTO mounting flange — A degraded 0501325470: SEALING RING or worn gasket can cause transmission fluid to weep from the joint, leading to low oil levels and potential gear damage.
- Abnormal gear whine or grinding noises — Worn bearings or misaligned shafts produce a distinct metallic noise during PTO activation. This often indicates internal damage to the 4108301468: INPUT SHAFT or its supporting bearings.
- Complete PTO lock-up or failure to disengage — A seized shift mechanism or broken retaining ring can prevent the PTO from disengaging, causing continuous pump operation even when the transmission is in neutral.
Technical Specifications
| Part Number | 4108.111.061 |
| Product Type | Power Take-Off Assembly |
| Material | High-strength cast iron housing with hardened steel gears |
| Weight | Approx. 14.5 kg (32.0 lbs) |
| Mounting Flange Diameter | SAE 3-Bolt (130 mm bolt circle) |
| Input Speed Range | Up to 2500 RPM |
| Torque Capacity | 450 Nm (332 lb-ft) intermittent |
| OEM Reference | ZF 4108.111.061 |
Compatibility
This PTO is designed for use with ZF WG series powershift transmissions commonly found in construction machinery. It directly interfaces with the 4108101172: HOUSING assembly, which provides the structural mounting and oil galleries. Compatible transmission models include the WG180, WG200, and WG250 series, as well as certain variants of the WG120 and WG150 used in wheel loaders and graders. For precise fitment, always verify the transmission serial number and the presence of the 0730365280: TYPE PLATE to confirm the original equipment configuration.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4108101172 | HOUSING | Main structural enclosure for the PTO assembly |
| 0501325470 | SEALING RING | Prevents oil leaks at the PTO-to-housing interface |
| 0730365280 | TYPE PLATE | Identification tag with transmission specifications |
| 4108301468 | INPUT SHAFT | Transfers rotational power from the transmission gear train |
| 0735330931 | BALL BEARING | Supports the input shaft and reduces friction |
| 0630532160 | RETAINING RING | Secures the bearing in its housing bore |
| 0630531130 | RETAINING RING | Locks the gear on the input shaft |
| 4475280018 | SCREW PLUG | Seals the oil fill or drain port on the housing |
| 0634304358 | O-RING | Provides a fluid-tight seal under the screw plug |
| 4108102067 | INPUT | Complete input assembly including shaft and gear |
