Overview
The ZF 4656.183.138 LOOSE PARTS kit is a critical service package designed specifically for the WG 171 series transmission. This assembly contains the essential loose components required to maintain the integrity of the transmission’s internal lubrication and hydraulic circuits. Positioned within the valve body and oil distribution network, this kit ensures proper sealing and fluid flow between the main housing and the front section. The SKU 4656.183.138 is an OEM genuine part, guaranteeing exact fitment and material compatibility for your ZF drivetrain. When paired with the TRANSMISSION HOUSING and the HOUS.FRONT SECT, this kit completes the sealing and filtration circuit necessary for reliable operation.
Symptoms of Failure
When the components within the 4656.183.138 LOOSE PARTS kit begin to degrade, operators will notice distinct performance issues. Look for these specific failure symptoms:
- Oil leaks at the transmission housing joint: Worn seals or gaskets in this kit cause fluid to weep between the TRANSMISSION HOUSING and the front section, leading to low fluid levels.
- Erratic gear engagement or slipping: Loss of hydraulic pressure due to degraded seals in the kit results in delayed or soft shifts, particularly under load.
- Contaminated oil or debris in the pan: A failing SCREEN SHEET within the kit allows particulate matter to circulate, accelerating wear on clutches and bearings.
- Overheating transmission: Restricted oil flow from a collapsed TUBE or blocked screen causes the unit to run hot, triggering warning lights.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4656.183.138 |
| OEM Reference | ZF WG171 Series |
| Material Composition | Steel, Nitrile Rubber, Aluminum |
| Weight (approx.) | 0.85 kg (1.87 lbs) |
| Dimensions (L x W x H) | 180 mm x 120 mm x 40 mm |
| Operating Temperature Range | -40°C to +120°C |
| Kit Contents | Seals, Gaskets, O-Rings, Screen Sheet, Tube |
Compatibility
This genuine ZF 4656.183.138 LOOSE PARTS kit is engineered primarily for the WG 171 transmission series. However, due to shared architecture, it is also compatible with the WG 180, WG 200, and WG 150 series where the same internal oil routing and sealing geometry is used. Always verify your transmission model tag before ordering. The kit integrates directly with the HOUSING REAR PART and requires the use of O-RING seals for a leak-free installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101028 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4656301066 | HOUS.FRONT SECT | Front section housing for pump and valve body |
| 4656201015 | SCREEN SHEET | Fine mesh filter for hydraulic oil |
| 4656301037 | TUBE | Oil delivery tube between sections |
| 0634313514 | O-RING | Static seal for housing joints |
| 0636100803 | CAP SCREW | Fastener for housing assembly |
| 4656301042 | HOUSING REAR PART | Rear section housing for output shaft |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for component positioning |
| 0636100801 | CAP SCREW | Fastener for valve body mounting |
| 0636100160 | CAP SCREW | Fastener for oil pan attachment |
Frequently Asked Questions
Q: Can I install the 4656.183.138 kit without replacing the transmission housing?
A: Yes, this kit is designed as a loose parts service set. However, we strongly recommend inspecting the TRANSMISSION HOUSING for cracks or wear before reassembly, as housing damage can compromise the new seals.
Q: How often should the SCREEN SHEET in this kit be replaced?
A: The SCREEN SHEET should be replaced every major transmission overhaul or whenever contamination is found in the oil. Using the 4656.183.138 kit ensures all filtration and sealing elements are renewed simultaneously.
Q: Is this kit compatible with the WG180 transmission?
A: Yes, the 4656.183.138 LOOSE PARTS kit is compatible with WG180, WG200, and WG150 series transmissions that share the same oil routing architecture as the WG171. Always cross-reference your transmission serial number with the OEM parts catalog.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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