ZF 0730.006.998 SHIM | OEM Genuine Part

Overview

The ZF 0730.006.998 SHIM is a precision-engineered OEM genuine component designed to establish exact axial clearances within the differential assembly of heavy-duty construction machinery transmissions. This shim, identified by SKU 0730.006.998, sits between the bearing journal and the differential housing, ensuring that the gear train maintains proper preload and alignment under extreme load conditions. By compensating for manufacturing tolerances, this shim prevents excessive end-play and maintains the critical mesh pattern between the ring gear and pinion. It is frequently replaced during a full differential rebuild alongside the 5838109012: DIFFERENTIAL to guarantee long-term drivetrain reliability.

Symptoms of Failure

When the ZF 0730.006.998 SHIM wears or collapses, it introduces excessive clearance that leads to distinct operational issues. Watch for these specific failure symptoms:

• Axle end-play and gear clatter: A loose shim allows the differential carrier to shift, producing a rhythmic knocking sound during acceleration or deceleration, especially in WG180 models.
• Premature bearing failure: Without proper shim thickness, the 0750117075: TAPER ROLLER BEARING experiences uneven loading, leading to brinelling and eventual seizure.
• Oil contamination from metal debris: As the shim disintegrates, fine metallic particles circulate through the transmission fluid, causing secondary damage to the 2093209023: DIFFERENTIAL gears.
• Intermittent gear slipping under load: When the differential housing shifts due to lost shim thickness, the ring gear loses proper contact, resulting in momentary power loss during heavy digging or grading operations.

Technical Specifications

Parameter	Specification
Part Number / SKU	0730.006.998
Material	Case-hardened alloy steel (SAE 8620)
Thickness	2.50 mm (nominal)
Outer Diameter	85.0 mm
Inner Diameter	62.0 mm
Weight	0.045 kg
OEM Reference	ZF 0730.006.998
Hardness	58-62 HRC

Compatibility

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

• ZF WG180 (all series)
• ZF WG200
• ZF WG210
• ZF 4WG-200
• ZF 4WG-210

Always verify the shim stack height during installation. For complete differential assembly, pair this shim with the 5838300626: DIFFERENTIAL HOUSING to ensure correct carrier alignment and oil flow.

Related Components

Part Number	Name	Function
5838109012	DIFFERENTIAL	Distributes torque to axle shafts
0750117075	TAPER ROLLER BEARING	Supports differential carrier rotation
2093209023	DIFFERENTIAL	Secondary torque split unit
5838300626	DIFFERENTIAL HOUSING	Encloses and supports gear set
0631329088	SPRING PIN	Secures shim and gear alignment
5838300811	THRUST WASHER	Controls axial end-play
5838300721	AXLE BEVEL GEAR	Transfers power to axle shafts
5838300633	AXLE	Drives wheel hubs
5838300753	THRUST WASHER	Reduces friction on gear faces
5838300818	THRUST WASHER	Additional axial load distribution

Frequently Asked Questions

Q: How do I know if the 0730.006.998 shim needs replacement?
A: Measure the differential carrier end-play with a dial indicator. If clearance exceeds 0.15 mm, the shim has likely compressed or worn. Replace it immediately to prevent taper roller bearing damage.

Q: Can I reuse this shim during a rebuild?
A: No. ZF OEM shims are designed for single-use only. Reusing a compressed shim will result in incorrect preload and rapid failure of the differential assembly. Always install a new 0730.006.998 shim.

Q: Is this shim compatible with the ZF WG180 transmission?
A: Yes, the 0730.006.998 shim is a standard fitment for all WG180, WG200, and WG210 series transmissions used in wheel loaders and graders. Verify your housing part number against the 5838300626 differential housing for exact fit.