Lumina APV V6-191 3.1L (1990)
Power Steering Pump: Service and Repair
Vane Type Power Steering Pump
Flushing Power Steering System
1.
Raise front end of vehicle off ground until wheels are free to turn.
2.
Remove fluid return hose at pump inlet connector and plug connector port on pump. Position hose in large container.
3.
While an assistant is filling reservoir with new power steering fluid, run engine at idle. turn steering wheel from stop to stop. Do not contact
wheel stops or hold wheel in a corner as fluid will stop and pump will be in pressure relief mode. A sudden overflow from reservoir may
develop if wheel is held at a stop.
4.
Install all pipes and hoses. Fill system with new power steering fluid and bleed system as outlined under SYSTEM BLEEDING.
5.
Operate engine for 15 minutes.
6.
Remove pump return hose at pump inlet and plug connection on pump. While refilling reservoir, check draining fluid for contamination. If foreign
material is still evident, replace all hoses, disassemble and clean or replace power steering system components. Do not reuse any drained power
steering fluid.
System Bleeding
1.
Fill pump fluid reservoir to proper level and let fluid settle for at least two minutes.
2.
Start and run engine for a few seconds. Do not turn steering wheel.
3.
Turn engine Off. Check fluid level, add fluid if necessary.
4.
Repeat above procedure until fluid level remains constant after running engine.
5.
Raise front end of vehicle so wheels are off ground.
6.
Start engine. Slowly turn steering wheel in both directions, lightly contacting wheel stops.
7.
Add power steering fluid, if necessary.
8.
Lower vehicle and turn steering wheel slowly from lock to lock.
9.
Stop engine. Check fluid level and refill as required.
10.
If fluid is extremely foamy, allow vehicle to stand a few minutes and repeat above procedure.
