ZF 0737.502.164 SLOTTED NUT | OEM Genuine Part

Overview

The ZF 0737.502.164 SLOTTED NUT is a precision-engineered locking component designed to secure rotating assemblies within ZF powershift transmissions. This OEM genuine part, identified by SKU 0737.502.164, functions as a critical axial retention device on the main shaft, preventing unwanted disassembly of gear clusters and bearings under high-torque loads. In construction machinery transmissions, this slotted nut interfaces directly with the 2094104412: MAIN SHAFT and the 2094304054: MAIN SHAFT, ensuring that the shaft assembly remains rigidly coupled during aggressive shifting cycles. Its unique slot design accommodates a cotter pin or locking tab, providing a vibration-resistant fastening solution that withstands the harsh operating environments typical of wheel loaders, graders, and excavators.

Symptoms of Failure

• Transmission shaft end-play and axial movement: When the 0737.502.164 slotted nut loosens, operators may notice excessive play in the driveline, leading to inconsistent gear engagement and a knocking sensation during acceleration or deceleration.
• Oil seepage from the shaft seal area: A worn or improperly torqued slotted nut can allow the main shaft to shift, compromising the seal lip contact and causing hydraulic fluid to weep from the transmission housing, often mistaken for a simple seal failure.
• Gear slipping under load in forward or reverse: As the nut loses its clamping force, the gear stack on the main shaft can shift, resulting in partial disengagement of clutch packs and intermittent power loss, particularly noticeable when operating on inclines.
• Metallic debris in the transmission oil filter: A failing slotted nut may fret against the shaft threads or adjacent components like the 2094206001: GEARSHIFT SHAFT, generating fine steel particles that contaminate the lubrication system.

Technical Specifications

Compatibility

This slotted nut is a standard retention component found in several ZF heavy-duty transmission families used in construction machinery. It is directly compatible with the WG180 and WG200 series, as well as the WG120 and WG150 models where the main shaft diameter matches the M30 thread. The 0737.502.164 also appears in the 4WG-200 and 5WG-200 variants, securing the output shaft assembly. For installations involving the 2094106010: SHIFT SYSTEM, this nut ensures that the shift mechanism remains properly indexed relative to the rotating shaft. Always verify thread pitch and slot width against your specific transmission model before installation.

Related Components

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