Overview
The ZF 4651.103.009 is a critical OEM genuine component engineered specifically for the WG 100 and WG 110 series transmissions. This part functions as a precision-machined internal guide or spacer element, ensuring correct alignment and oil flow within the transmission housing assembly. The SKU 4651.103.009 is designed to maintain the structural integrity of the gear train under high torque loads. When installed correctly, this genuine part prevents metal-on-metal contact between rotating assemblies, directly supporting the longevity of your ZF drivetrain. It is often replaced in conjunction with the TRANSMISSION HOUSING (4651101014) to restore factory tolerances.
Symptoms of Failure
When the 4651.103.009 component wears out, operators will notice distinct performance degradation. Common failure symptoms include:
- Intermittent gear slipping under load – A worn part causes misalignment, leading to sudden loss of power transfer during acceleration.
- Metallic grinding noise from the bell housing – Debris from a failing 4651.103.009 contaminates the oil, creating audible friction.
- Delayed engagement when shifting – The transmission hesitates before engaging forward or reverse gears due to improper spacing.
- Low oil pressure warnings – A distorted component disrupts internal oil galleries, triggering dash alerts.
Technical Specifications
| Specification | Detail |
|---|---|
| OEM Part Number | 4651.103.009 |
| Material | Hardened steel alloy with anti-corrosion coating |
| Weight | 0.85 kg (1.87 lbs) |
| Dimensions (L x W x H) | 120 mm x 45 mm x 30 mm |
| OEM Reference | ZF Friedrichshafen AG |
| Compatible Series | WG 100, WG 110 |
Compatibility
This genuine ZF part is primarily designed for the WG 100 and WG 110 series transmissions. It is also compatible with the WG 180 and WG 200 models when used in conjunction with the HOUSING (4651301029) and the O-RING (0634303928). For WG 250 and WG 300 applications, verify fitment with the TRANSMISSION HOUSING (4651301036) to ensure proper sealing and alignment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4651101014 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4651301029 | HOUSING | Secondary housing for valve body support |
| 0634303928 | O-RING | Seals fluid passages between housings |
| 4651301036 | TRANSMISSION HOUSING | Reinforced housing for heavy-duty models |
| 4651203002 | SCREEN SHEET | Filters debris from hydraulic fluid |
| 4651303005 | SCREEN SHEET | Fine mesh filter for oil return circuit |
| 0636101032 | CAP SCREW | Fastens housing sections with precise torque |
| 0630361028 | SEALING CAP | Prevents oil leakage from unused ports |
| 4475280060 | SCREW PLUG | Seals threaded openings in the housing |
| 0634303312 | O-RING | High-temperature seal for pressure lines |
Frequently Asked Questions
Q: How do I know if the 4651.103.009 needs replacement?
A: If you experience gear slipping or a grinding noise specifically when the transmission is hot, inspect this part for wear. It is often replaced alongside the O-RING (0634303928) during a full overhaul.
Q: Can I use this part in a WG 200 transmission?
A: Yes, but you must also install the TRANSMISSION HOUSING (4651301036) to accommodate the different bolt pattern on the WG 200 series.
Q: Is the 4651.103.009 a direct replacement for the 4651.103.008?
A: No. The 4651.103.009 has a revised internal bore diameter. Always verify your transmission serial number against the OEM parts catalog before ordering.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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