Power Steer Pump Overhaul
Page created by Qute July 10th 2006:
==Power Steering Pump Overhaul:==
The following was posted by Q-ball in response to a question about replacing the front seal in an HQ - WB Power Steering Pump. Apparently, the same method can be used for all Power Steering Pumps from HT to VT.
===Step By Step:===
Alright, if your going to change the pulley & reservoir, your halfway to reco-ing the pump any-how!!
Grab a seal kit from Holden or your friendly auto. trans reco man (Fluidrive??), the front seal leaks on these pumps alot, from HT right through to VT, the opperation is also much the same all-through.
Un-do bolts/studs & pressure valve (watch out for spring & little piston), this removes reservoir, might be a round magnet or 2 in here as well.
Should now be able to see the round pump back, its a bit larger than the bottom of a Burbon can & held in with a large "c" clip.
To press this plate down (it has a spring behind it) place in a vice with a socket in the middle of the plate & tighten the vice (only goes in about 3mm), to aid in removal of the clip there is a small hole to push it in (in the pump body)with a small screw driver & remove C clip.
The plate should pop out as you undo the vice, if not tap the pulley face down on the bench.
HINT-:Try & keep the pulley face down for the next few steps, stops all the bits falling on the floor!!
With the plate removed should now see the insides of the pump, a simple vane pump, remove the vanes so you know which way round they go back into the rotor
Mark the inner pump body to the outer body(good old Liquidpaper) & remove the inner body & 2 pins
Place pump in a vice gripped by the snout of the pulley, now the tricky bit!!, the rotor is held to the shaft by a small C clip, it CAN be a bugger to get out, pry out with a couple of small screwdrivers & make sure the little bugger doesn't take off across the w/shop!!, if in doubt place a rag over the rotor as you do this.
Lift off the rotor, it also only goes on 1 way, then lift off the outer pump body, flip it over & there's your front seal, fit new seal & rebuild the pump in reverse order.
Take note-:When re-fitting the small rotor C clip not to stretch it too much or it woun't stay on, pushing it down with a 1/4" drive socket (say 7mm) works for me.
You will see 2 big O rings in the seal packet, these go in the grooves for the inner pump body & the pump plate.
After re-fitting the plate give it a couple of taps with a hammer to make sure the big C clip is all the way home. Lube ALL seals & O rings as you fit them.
This may seem like a big job, but once you've done 1 or 2 you can do em'in your sleep!!. Also this works on most pumps from HT to VT.
PLEASE NOTE...I have done this many times when I have not had access to the tool to remove/replace the front pulley, the ONLY failure I had was when I did NOT seat the big C clip!!
Perhaps fit the spare pump, then kit up your good one over a couple of nites, take your time & you'll get it.