Astro Van M V6-262 4.3L VIN W CPI (1992)
2.
Check vane tips for scoring or wear. Vanes must fit snugly but slide freely in slots of rotor. Examine rotor slots for burrs and excessive wear at
thrust faces.
3.
Check inner surface of pump ring for scoring or wear and thrust plate and pressure plate for wear on plate surfaces.
4.
If heavy wear is evident in any of above components, replace entire rotating group.
5.
Inspect seal for leakage, cracking or swelling, if evident replace seal.
6.
Check driveshaft for excessive burning or scoring.
7.
Control valve must move smoothly in the valve bore.
Assembly
1.
Lubricate O-rings, pump ring, rotor and vanes with power steering fluid.
2.
Install O-rings and dowel pins on pump housing.
3.
Using a seal installation tool, insert seal into front of housing.
4.
Install driveshaft and thrust plate. Ensure counterbore faces driveshaft end of housing and install rotor.
5.
Insert vanes into rotor, ensuring rounded edge faces away from rotor.
6.
Install shaft retaining ring, pump ring and pressure plate.
7.
Insert control valve spring, then install control valve and O-ring.
8.
Install pressure plate spring and end plate, then secure with end plate retaining ring.
9.
Connect seal and reservoir, then install bolt and fitting.
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.
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.
Removal/Installation
1.
Disconnect battery ground cable, then place suitable drain pan under pump.
2.
Loosen belt tensioner, then remove belt.
3.
On 4.3L/V6-262 engines, remove rear brace attaching nuts, then the rear brace.
4.
On all models, remove pulley, using puller J-29785-A or equivalent.
5.
Disconnect and cap pressure and return hoses.
6.
Remove pump attaching bolts, then the pump.
7.
Reverse procedure to install. Tighten mounting bolts to specifications. If equipped with a 4.3L/V6-262 engine, tighten rear brace-to-stud nut and
the brace-to-pump nut to specifications.
Disassembly
