Overview
The ZF 0501.338.452 OIL SIGHT GLASS is a critical visual diagnostic component engineered for heavy-duty construction machinery transmissions. This OEM genuine part provides a direct window into the transmission’s lubrication system, allowing operators to verify fluid levels and condition without disassembly. Positioned on the transmission housing, typically near the sump or pump area, the sight glass enables quick, routine checks of oil clarity and volume. The SKU 0501.338.452 is precision-machined to withstand high thermal cycling and vibration, ensuring a leak-proof seal over extended service intervals. When inspecting the driveline, always verify the condition of the 2099109042: DIFFERENTIAL and the 2093309078: DIFF.HOUSING for any signs of contamination that may appear through this glass.
Symptoms of Failure
When the ZF 0501.338.452 oil sight glass deteriorates, it compromises both monitoring accuracy and system integrity. Watch for these specific failure indicators:
- Oil seepage around the glass perimeter: A cracked or degraded seal allows transmission fluid to weep externally, leaving residue on the housing.
- Cloudy or opaque viewing window: Internal chemical etching or thermal stress causes the glass to fog, making fluid level checks unreliable.
- Gear slipping or delayed engagement: If the sight glass fails completely, fluid loss can lead to low oil pressure, directly affecting clutch pack engagement and shift quality.
- Visible cracks or impact damage: Debris strikes or overtightening during installation can shatter the glass, risking sudden fluid loss and transmission failure.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 0501.338.452 |
| Material | Heat-resistant borosilicate glass with nitrile rubber seal |
| Thread Size | M22 x 1.5 (estimated) |
| Overall Diameter | 32 mm |
| Overall Height | 18 mm |
| Weight | 0.04 kg |
| Operating Temperature Range | -40°C to +120°C |
| OEM Reference | ZF 0501.338.452 |
Compatibility
This oil sight glass is a standard fitment across multiple ZF powershift transmission families used in construction machinery. It is commonly found on the WG180, WG200, and WG310 series, as well as the ERGOPOWER 3-speed and 4-speed models. The part also integrates with the 0750117075: TAPER ROLLER BEARING and the 2093209094: DIFFERENTIAL assemblies, where proper oil level monitoring is essential for bearing and gear longevity. Always cross-reference your transmission serial number to confirm fitment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2099109042 | DIFFERENTIAL | Distributes torque between drive wheels |
| 0750117075 | TAPER ROLLER BEARING | Supports axial and radial loads on shafts |
| 2093209094 | DIFFERENTIAL | Provides speed differentiation between axles |
| 2093309078 | DIFF.HOUSING | Encloses differential gear set |
| 0631100223 | SPRING PIN | Secures gear and shaft alignment |
| 0730300820 | THRUST WASHER | Reduces axial friction in gear sets |
| 4482360002 | AXLE BEVEL GEAR | Transfers power to axle shafts |
| 2097309085 | DIFFERENTIAL AXLE | Transmits torque from differential to wheels |
| 5838300811 | THRUST WASHER | Controls end-play in planetary gears |
| 4482360001 | DIFFERENTIAL BEVEL GEAR | Engages with axle bevel gear for rotation |
