ZF 0730.109.379 SHIM | OEM Genuine Part

Overview

The ZF 0730.109.379 SHIM is a precision-engineered OEM genuine part designed to establish the correct axial clearance and preload within the final drive assembly of heavy-duty construction machinery transmissions. This shim sits between the differential housing and the bearing race, compensating for manufacturing tolerances to ensure optimal gear mesh and load distribution. The SKU 0730.109.379 is critical for maintaining the exacting tolerances required in ZF power shift transmissions, preventing premature wear on adjacent components such as the 5838109012: DIFFERENTIAL and the 0750117075: TAPER ROLLER BEARING.

Symptoms of Failure

When the ZF 0730.109.379 shim wears, compresses, or is incorrectly selected during rebuild, several distinct failure modes emerge. Look for these specific symptoms to diagnose a failing shim:

• Excessive differential bearing play – A loose shim causes axial movement in the differential assembly, leading to a distinct “clunk” when shifting between forward and reverse under load.
• Premature taper roller bearing failure – Incorrect shim thickness alters preload on the 0750117075: TAPER ROLLER BEARING, generating abnormal heat and metallic debris in the transmission oil.
• Oil seepage at the differential housing interface – A collapsed shim changes the housing geometry, breaking the seal between the 5838300626: DIFFERENTIAL HOUSING and the transmission case, resulting in slow oil leaks.
• Gear whine from the differential – Misaligned backlash due to shim wear creates a constant, load-dependent whining noise from the 2093209023: DIFFERENTIAL assembly.

Technical Specifications

Specification	Value
Part Number / SKU	0730.109.379
Material	Case-hardened steel (DIN 1.7131 equivalent)
Thickness	1.50 mm (nominal, selectable range)
Outer Diameter	112.0 mm
Inner Diameter	92.0 mm
Weight	0.045 kg
OEM Reference	ZF 0730.109.379
Surface Finish	Ground, Ra ≤ 0.8 µm

Compatibility

This shim is specifically engineered for ZF power shift transmissions used in construction machinery. It is a standard fitment in the final drive section of the following transmission models:

• ZF WG180 series (all variants)
• ZF WG200 series (including WG200-3, WG200-5)
• ZF WG150 series (select high-torque configurations)
• ZF 4WG-200 and 4WG-210 series

Always verify the shim stack height during rebuild. This part works in conjunction with the 5838300626: DIFFERENTIAL HOUSING to set the correct preload on the 0750117075: TAPER ROLLER BEARING.

Related Components

Part Number	Name	Function
5838109012	DIFFERENTIAL	Distributes torque to the axle shafts
0750117075	TAPER ROLLER BEARING	Supports differential rotation under axial load
2093209023	DIFFERENTIAL	Secondary differential unit for multi-axle drives
5838300626	DIFFERENTIAL HOUSING	Encloses and supports differential gears
0631329088	SPRING PIN	Secures shift fork or actuator linkage
5838300811	THRUST WASHER	Controls axial end-play in gear sets
5838300721	AXLE BEVEL GEAR	Transfers power to the axle shaft
5838300633	AXLE	Drives the final wheel hub
5838300753	THRUST WASHER	Reduces friction in planetary gear sets
5838300818	THRUST WASHER	Provides axial support for sun gear

Frequently Asked Questions

Q: How do I know if the 0730.109.379 shim thickness is correct for my rebuild?
A: The correct shim thickness is determined by measuring the differential housing end-play with a dial indicator. Install the 5838300626: DIFFERENTIAL HOUSING without the shim, measure the gap, and select the 0730.109.379 shim that brings preload within the ZF specification of 0.05–0.15 mm.

Q: Can I reuse this shim if it looks undamaged?
A: ZF strongly recommends replacing all shims during a transmission overhaul. Even if the shim appears flat, microscopic compression from years of service can alter preload, leading to premature failure of the 0750117075: TAPER ROLLER BEARING.

Q: Does this shim fit the ZF WG180 and WG200 transmissions equally?
A: Yes, the 0730.109.379 shim is a shared component across the WG180, WG200, and 4WG-200 series. However, always confirm the shim stack count; some heavy-duty applications may require stacking two shims to achieve the correct preload on the 5838109012: DIFFERENTIAL.