Power Steering Pump Delivery Pressure, Checking
Power Steering Pump Delivery Pressure, Checking
Special tools, testers and auxiliary items required
• Power Steering Test Unit (VAG1402)
- Remove engine cover.
- Disconnect extension hose - arrow - while counterholding extension hose hex head.
• Place a cloth under separation point to absorb escaping hydraulic oil.
• Remove hydraulic line bracket if necessary to make work easier.
- Screw Power Steering Test Unit (VAG1402) hose onto extension hose.
- Close gauge shut-off valve (lever to left).
• To avoid damage to pump, observe the following:
• Pressure gauge shut-off valve must not remained closed longer than 10 seconds during this test.
• Start engine without giving gas and run at idle.
• Read the pump pressure immediately after starting at idle speed (have it read by second technician, if necessary).
• Because pressure falls over the course of the test, the highest pressure shown is the decisive measurement.
- Start engine and top off fluid level in reservoir if necessary.
- At idle speed, read the pressure on pressure gauge (measurement no longer than 10 seconds).
Pump Pressure Specified Value (Positive Pressure)
If specification is not obtained, replace power steering pump.
- Switch off engine.
- Remove pressure gauge.
- Connect extension hose while counterholding hose hex head.
- Check power steering fluid level. Refer to => [ Power Steering, Checking Fluid Level ] Testing and Inspection.
- Check steering system for leaks. Refer to => [ Steering System, Checking for Leaks ] Steering System, Checking for Leaks.
- Bleed steering system. Refer to => [ Steering System, Bleeding after Reconstructing ] Service and Repair