Overview
This genuine ZF 0750.111.231 shaft seal is a critical component designed to prevent lubricant loss and contaminant ingress within the transmission housing. Positioned at the output shaft interface, it maintains hydraulic pressure integrity and protects internal gearsets from abrasive debris. As an OEM-sourced part, SKU 0750.111.231 ensures precise dimensional tolerances and material compatibility with factory-specification seals. Its primary function is to create a static and dynamic barrier between rotating shafts and stationary housing bores, directly influencing transmission service life and operational reliability in heavy construction machinery.
Symptoms of Failure
When the ZF 0750.111.231 seal degrades, operators will notice distinct performance issues. Watch for these specific failure indicators:
- External oil seepage around the output shaft flange – Visible drips or wet residue near the bell housing indicate the seal lip has hardened or cracked, allowing transmission fluid to escape.
- Gradual gear engagement delay or clutch chatter – Loss of internal hydraulic pressure from a failing seal can cause sluggish shifts or irregular clutch pack behavior during low-speed maneuvers.
- Contaminated transmission fluid with metallic particles – A compromised seal permits dirt and moisture entry, accelerating wear on bearings and planetary gears, often detected during routine oil analysis.
- Whining or grinding noise from the transmission sump – Reduced lubrication volume due to leakage creates audible metal-on-metal contact, particularly under load in construction equipment.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number / SKU | 0750.111.231 |
| Inner Diameter (Shaft) | 75.0 mm |
| Outer Diameter (Housing) | 100.0 mm |
| Width / Thickness | 12.0 mm |
| Material | Nitrile rubber (NBR) with steel reinforcement |
| Weight | 0.08 kg (approx.) |
| OEM Reference | ZF 0750.111.231 (genuine) |
Compatibility
This shaft seal is engineered for ZF power shift transmissions commonly deployed in construction machinery. Based on its dimensions and seal profile, it is compatible with the following ZF transmission models:
- ZF WG180 series (all variants)
- ZF WG200 series (including WG200-5 and WG200-6)
- ZF WG120 series (select output shaft configurations)
- ZF 4WG-180 and 4WG-200 transfer case assemblies
Always verify the seal housing bore diameter and shaft surface condition before installation. For non-standard applications, consult your equipment’s service manual or a ZF authorized distributor to confirm fitment.
