Overview
The ZF 4657.199.052 LOOSE PARTS kit is a critical service assembly designed for the WG190 and WG210 series transmissions. This OEM genuine part consolidates essential hardware and sealing components that secure internal assemblies and prevent fluid migration between chambers. As a loose parts set, it includes the necessary fasteners and retainers that interface directly with the TRANSMISSION HOUSING and the HOUS.FRONT SECT. The SKU 4657.199.052 is often ordered during a full rebuild or when addressing oil circuit integrity issues in ZF off-highway transmissions.
Symptoms of Failure
When the components within the 4657.199.052 kit degrade or are improperly torqued, operators may notice specific performance declines. Look for these failure indicators:
- External oil seepage at housing joints: Worn gaskets or loose fasteners from this kit cause fluid to weep between the HOUSING REAR PART and the main case.
- Intermittent gear engagement hesitation: If retaining hardware loosens, internal clearances shift, leading to delayed clutch pack application.
- Metallic debris in the oil pan: A loose CYLINDRICAL PIN can shear and circulate through the hydraulic system.
- Abnormal transmission noise under load: Missing or damaged loose parts allow bearing preload to escape, creating a low-frequency growl.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4657.199.052 |
| Kit Contents | Fasteners, seals, retaining rings, pins |
| Material Composition | Steel (fasteners), Nitrile (seals) |
| Weight (approx.) | 0.45 kg (1.0 lb) |
| Thread Specification | M8 x 1.25 (primary cap screws) |
| OEM Reference | ZF 4657.199.052 |
Compatibility
This loose parts kit is engineered for the ZF WG series power shift transmissions. It is directly compatible with the WG190 and WG210 models, which are common in wheel loaders and industrial tractors. The kit also fits the WG180 and WG200 variants when used with the corresponding TRANSMISSION HOUSING. Always verify the housing casting number before installation to ensure correct fitment of the HOUS.FRONT SECT and rear cover interfaces.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101033 | TRANSMISSION HOUSING | Main structural case for gear sets |
| 4657201027 | HOUS.FRONT SECT | Front section housing the torque converter |
| 4657201012 | HOUSING REAR PART | Rear cover for output shaft support |
| 0631306792 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 0636100801 | CAP SCREW | Fastener for housing flanges |
| 4656301148 | FIXING PLATE | Retains clutch piston assembly |
| 4657301032 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter |
| 0636100803 | CAP SCREW | High-tensile bolt for valve body |
| 4681301040 | OIL FEED.HOUSG. | Pressurized oil supply channel |
Frequently Asked Questions
Q: Can the 4657.199.052 kit be reused after disassembly?
A: No. ZF recommends replacing all loose parts in this kit with new OEM components during any transmission overhaul. Reusing fasteners or seals risks improper clamping force and subsequent oil leaks.
Q: Does this kit include the CYLINDRICAL PIN for the housing alignment?
A: Yes. The 4657.199.052 set contains the CYLINDRICAL PIN (0631306792) necessary for precise alignment between the main housing and the rear cover.
Q: What torque specification applies to the cap screws in this kit?
A: For the M8 cap screws included, use 25 Nm (18 ft-lb) with thread locker applied to the first three threads. Always consult the ZF service manual for your specific WG190 or WG210 model.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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