ZF 4699.170.156 MOTOR | OEM Genuine Part

Overview

The ZF 4699.170.156 MOTOR is a critical hydraulic actuation component within the power-shift transmission assembly, specifically engineered for heavy-duty construction machinery. This OEM genuine part converts hydraulic pressure into mechanical force to engage clutch packs and control gear selection. The SKU 4699.170.156 designates a direct replacement motor unit that interfaces with the transmission’s valve body and rotating clutch drums. When installed correctly, it ensures precise modulation of oil flow for smooth shifting under extreme load conditions. This motor works in tandem with the 4699027011: GP25 gear pump to maintain consistent hydraulic circuit pressure.

Symptoms of Failure

• Erratic or delayed gear engagement — A worn 4699.170.156 motor causes sluggish clutch pack activation, leading to hesitation when shifting from forward to reverse under load.
• Internal hydraulic leakage — Degraded seals within the motor unit allow pressurized oil to bypass, resulting in visible drips from the transmission housing bellhousing area.
• Transmission overheating — A failing motor forces the pump to work harder, generating excess heat that triggers thermal warning lights on the dashboard.
• Intermittent power loss — When the motor cannot hold pressure, the transmission slips out of gear during uphill climbs or heavy digging operations.

Technical Specifications

Compatibility

This motor is designed for ZF’s WG series powershift transmissions commonly found in wheel loaders, dozers, and excavators. It is a direct fit for the WG180, WG200, and WG210 models. The 4699.170.156 interfaces with the 4699101099: HOUSING that encloses the clutch piston assembly and the 4699102099: INPUT shaft drive gear. For output-side integration, the 4699103045: OUTPUT flange must be properly aligned during installation. Always verify transmission serial number before ordering.

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