Overview
The ZF 4616.199.173 LOOSE PARTS assembly is a critical service kit designed specifically for the WG 65 Series transmission. This OEM genuine part consolidates essential wear components that govern hydraulic pressure regulation and mechanical sealing within the valve body assembly. The SKU 4616.199.173 is engineered to restore precise shift timing and clutch engagement integrity in heavy-duty ZF off-highway transmissions. When installed as part of a comprehensive rebuild, this loose parts set directly interfaces with the 4616105416: VALVE and the 0501319251: SOLENOID VALVE to maintain consistent oil flow under high torque loads.
Symptoms of Failure
- Delayed gear engagement under load: Worn components from the 4616.199.173 kit cause sluggish forward or reverse shifts, especially when the transmission oil temperature rises above 90°C.
- Erratic clutch pressure fluctuations: A failing loose parts set leads to intermittent pressure drops, resulting in harsh or slipping shifts during grade climbing or heavy hauling.
- External oil seepage at valve body joints: Degraded sealing elements within this kit produce visible oil leaks around the transmission pan and valve body mating surfaces, often mistaken for main seal failure.
- Increased shift cycling noise: Worn internal components create a distinct “chattering” sound during gear changes, indicating insufficient hydraulic damping.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4616.199.173 |
| OEM Reference | ZF 4616.199.173 (Genuine) |
| Material Composition | Hardened steel, nitrile rubber seals, aluminum alloy spacers |
| Weight | 0.85 kg (1.87 lbs) |
| Dimensions (L x W x H) | 120 mm x 80 mm x 35 mm |
| Operating Temperature Range | -30°C to +120°C |
| Thread Pitch (primary fasteners) | M10 x 1.5 |
Compatibility
This genuine ZF 4616.199.173 loose parts kit is engineered for the WG 65 Series transmission family. Based on its valve body architecture and seal geometry, it is also compatible with the following ZF models: WG180, WG200, WG250, and WG300 series transmissions used in construction loaders, mining trucks, and agricultural tractors. For proper installation, always pair this kit with a new 0636302013: SCREW PLUG and a 0634801038: SEALING RING to prevent cross-threading and ensure leak-free operation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105416 | VALVE | Hydraulic flow control within valve body |
| 0501319251 | SOLENOID VALVE | Electronic shift pressure modulation |
| 0636302013 | SCREW PLUG | Seals hydraulic test ports |
| 0634801038 | SEALING RING | Prevents oil leakage at plug interfaces |
| 4616305078 | CONSOLE | Mounting bracket for valve body assembly |
| 0636010047 | HEXAGON SCREW | Fastens valve body to transmission case |
| 0636101020 | CAP SCREW | Secures solenoid valve housing |
| 0630001010 | WASHER | Distributes load under fastener heads |
| 0637006015 | HEXAGON NUT | Locks console and bracket assemblies |
| 0637842523 | SCREW-IN SLEEVE | Provides threaded insert for high-torque connections |
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