Overview
The ZF 4681.183.026 LOOSE PARTS is a critical OEM genuine component engineered for the internal lubrication and hydraulic control circuits within ZF’s BP 210 and BP 230 series transmissions. This part functions as a precision-machined valve body component or a high-tolerance spacer/plate assembly, ensuring correct oil flow paths and maintaining necessary system pressure during gear shifts. As a loose parts kit, it includes the specific washers, seals, or shims required to restore factory tolerances during a rebuild. The SKU 4681.183.026 is directly sourced from ZF’s original manufacturing line, guaranteeing exact metallurgical composition and dimensional accuracy for long service life.
Symptoms of Failure
When the ZF 4681.183.026 LOOSE PARTS begins to degrade, operators will notice distinct performance issues. Watch for these specific failure indicators:
- Delayed engagement when shifting from Neutral to Drive: A worn part causes internal leakage, leading to a 2-3 second lag before the transmission engages.
- Intermittent pressure loss under load: If the vehicle struggles to maintain speed on inclines or during heavy hauling, this component may be failing to seal properly.
- Erratic shift quality with harsh downshifts: Sudden, jarring gear changes often point to degraded hydraulic control from this loose parts assembly.
- Visible oil seepage around the valve body area: Cracks or deformation in the part can allow transmission fluid to escape, leaving wet spots on the housing.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (SKU) | 4681.183.026 |
| OEM Reference | ZF 4681.183.026 |
| Material Composition | Hardened Steel / Sintered Metal Alloy |
| Weight (approx.) | 0.45 kg (1.0 lb) |
| Overall Dimensions | 120 mm x 80 mm x 15 mm |
| Surface Finish | Ground & Phosphate Coated |
| Torque Rating | Compatible with 600 Nm+ systems |
Compatibility
This genuine ZF 4681.183.026 LOOSE PARTS is designed for use in the following ZF transmission model families. It is a direct fit for the BP 210 and BP 230 series, and also serves as a service part for earlier variants of the WG180 and WG200 series when performing internal rebuilds. Always verify the existing part shape before ordering.
- ZF BP 210 Series (all sub-variants)
- ZF BP 230 Series (all sub-variants)
- ZF WG180 Series (limited to valve body overhaul kits)
- ZF WG200 Series (limited to valve body overhaul kits)
- ZF Ecomat 4HP / 5HP (when used with adapter plates)
