ZF 4660122002 Pressure Oil Pump: Price Factors & Troubleshooting
Technical Deep-Dive
The ZF 4660122002 pressure oil pump is a critical component in maintaining the hydraulic pressure necessary for proper transmission operation. It supplies oil to the various hydraulic circuits within the transmission, including clutch engagement, gear selection, and torque converter operation. Insufficient oil pressure due to a faulty pump can lead to slipping clutches, delayed gearshifts, and ultimately, transmission failure. We’ve seen many issues stemming from worn pumps.
Understanding the specs of your transmission is important, and while specific pressure output details for the 4660122002 pump require referencing the exact transmission model’s service manual, here’s a general overview of ZF Ergopower transmission types and their related components, based on available data:
The ZF Ergopower series offers hydrodynamic powershift transmissions that are widely used in construction vehicles. These transmissions incorporate helical gears to improve gearshift quality and reduce fuel consumption. (ref: 246067056-ZF-Services-UK-Off-Highway-ProductsServices-Brochure.pdf)
Here’s a general table outlining the ZF Ergopower series:
| Transmission Series | Typical Applications | Features |
|---|---|---|
| ZF Ergopower 4 WG 130-310 | Wheel loaders, graders | Hydrodynamic powershift |
| ZF Ergopower 115-210 | Forklifts, telehandlers | Hydrodynamic powershift |
| ZF Ergopower LII | Various construction equipment | Hydrodynamic powershift |
| ZF Ergopower WG 115, 160, 210 | Various construction equipment | Hydrodynamic powershift |
When replacing the 4660122002 pump, it’s crucial to inspect related components such as the oil filter (to check for debris), the oil cooler (to ensure proper cooling), and the hydraulic lines (for leaks or damage). Consider replacing the oil filter (consult your manual for the correct material number) simultaneously to prevent contamination of the new pump.
Step-by-Step Guide: Oil Pump Replacement (General)
Disclaimer: This is a general guide. Consult your specific ZF transmission service manual for detailed instructions and safety precautions. Always use proper safety equipment.
- Drain the Transmission Oil: Position a drain pan under the transmission and remove the drain plug. Allow the oil to drain completely.
- Remove the Old Pump: Access the oil pump location (refer to your manual). Disconnect any hydraulic lines or electrical connectors attached to the pump. Unbolt the pump from the transmission housing.
- Inspect the Mounting Surface: Clean the mounting surface on the transmission housing where the new pump will be installed. Remove any old gasket material or debris.
- Install the New Pump: Install a new gasket or O-ring (if required) on the new pump. Carefully align the pump with the mounting holes and bolt it to the transmission housing. Tighten the bolts to the specified torque (refer to your manual).
- Connect Hydraulic Lines and Electrical Connectors: Reconnect all hydraulic lines and electrical connectors to the new pump. Ensure that all connections are secure.
- Replace the Oil Filter: Install a new oil filter. This is critical to prevent contamination of the new pump.
- Refill the Transmission Oil: Refill the transmission with the correct type and amount of oil (refer to your manual).
- Check Oil Level: Verify the oil level using the dipstick or sight glass. Add more oil if necessary.
- Test the Transmission: Start the engine and allow the transmission to warm up. Check for any leaks or unusual noises. Test the transmission through all gear ranges to ensure proper operation.
When reinstalling, consider using genuine ZF parts from partszf.com for optimal reliability.
| Part Number | Name | Application | Notes |
|---|---|---|---|
| 4660122002 | Pressure Oil Pump | ZF Ergopower Transmissions | Main oil supply |
| 0501211637 | Pump | ZF Transmission | Various models; check availability here |
| 0501340932 | O-RING | ZF Transmission | Hydraulic Line Seal |
| 0501340933 | O-RING | ZF Transmission | Hydraulic Line Seal |
| 0501340935 | O-RING | ZF Transmission | Hydraulic Line Seal |
| 4660134002 | CONVERTER | ZF Ergopower Transmissions | Related component; CONVERTER (4660134002) |
| 0501316494 | BEARING BUSH | ZF Transmission | Pump support; check availability here |
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