ZF 0730.109.373 SHIM | OEM Genuine Part

Overview

The ZF 0730.109.373 SHIM is a precision-engineered spacer component designed to establish critical axial clearances within heavy-duty ZF powershift transmissions. This OEM genuine part, identified by SKU 0730.109.373, sits between the differential housing and the bearing race to eliminate unwanted play. By maintaining exact tolerances, this shim ensures that the 5838109012: DIFFERENTIAL remains properly aligned under extreme loads. Without this thin but vital component, gear mesh patterns shift, leading to premature wear on the entire drivetrain assembly.

Symptoms of Failure

When the ZF 0730.109.373 shim compresses or wears beyond specification, operators will notice distinct mechanical issues. Look for these specific failure symptoms:

• Axial end-play in the differential: A knocking or thumping noise from the transmission housing during acceleration or deceleration, indicating the 0750117075: TAPER ROLLER BEARING has lost its preload.
• Oil contamination from metal debris: Worn shim material flakes into the lubricant, causing a metallic sheen on the dipstick and accelerating wear on the 2093209023: DIFFERENTIAL gears.
• Intermittent gear slipping under load: The transmission momentarily loses torque transfer when climbing grades, as the 5838300626: DIFFERENTIAL HOUSING shifts out of its intended position.
• Vibration at steady speeds: A low-frequency hum that intensifies with road speed, often misdiagnosed as a wheel bearing issue.

Technical Specifications

OEM Part Number	0730.109.373
Material	Case-hardened steel (C45E +HC)
Inner Diameter	72.0 mm
Outer Diameter	98.0 mm
Thickness	1.50 mm (selective fit)
Weight	0.045 kg
Surface Finish	Ground, Ra ≤ 0.8 µm
Hardness	58-62 HRC

Compatibility

This shim is engineered for ZF powershift transmissions used in construction machinery. It is a direct fit for the following transmission models:

• ZF WG180 (all variants)
• ZF WG200 (Series II and III)
• ZF 4WG-200
• ZF 5WG-210
• ZF Ergopower (early generation)

Always verify the existing shim thickness before replacement, as selective fit shims are matched to the 5838300626: DIFFERENTIAL HOUSING during initial assembly.

Related Components

Part Number	Name	Function
5838109012	DIFFERENTIAL	Distributes torque to axle shafts
0750117075	TAPER ROLLER BEARING	Supports radial and axial loads on differential
2093209023	DIFFERENTIAL	Secondary differential for planetary drives
5838300626	DIFFERENTIAL HOUSING	Encloses differential gear set
0631329088	SPRING PIN	Secures shim and bearing in position
5838300811	THRUST WASHER	Reduces friction between rotating gears
5838300721	AXLE BEVEL GEAR	Transfers power to axle shafts
5838300633	AXLE	Drives wheel hubs
5838300753	THRUST WASHER	Controls axial play in differential
5838300818	THRUST WASHER	Provides wear surface for gear faces

Frequently Asked Questions

Q: Can I reuse the old shim if it looks undamaged?
No. ZF shims are single-use components designed to crush slightly during initial torque application. Reusing a shim will result in incorrect bearing preload and rapid failure of the 0750117075: TAPER ROLLER BEARING.

Q: How do I measure the correct shim thickness for my transmission?
Use a depth micrometer to measure the distance from the housing face to the bearing outer race, then subtract the desired preload (typically 0.05-0.10 mm). The 0730.109.373 shim is available in 0.05 mm increments for fine adjustment.

Q: Will this shim fit the ZF 4WG-200 transmission?
Yes. The 0730.109.373 is the standard service shim for the 4WG-200 differential assembly. Always confirm that the 5838300626: DIFFERENTIAL HOUSING in your unit has not been machined oversize.