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Power Steering/brake question?

steelydan

steelydan

New Member
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Location
Mission B.C.
Yesterday I replace pads, rotors and calipers on my '99 K2500 Sub. Drove into Vancouver to visit the wife's mother. Truck ran fine about 100 miles round trip. Today I took my kids up Snowboarding. Road is steep and has nasty slippery gravel (hemlock valley). No snow on road as it has been quite warm here. When I was going uphill and around a sharp greasey gravel corner I hard to get on the brakes...lost ALL power steering. Tried to duplicate it again and could about a mile further up the road. Tried several more times and could not duplicate...

-I know the power steering pump supplies pressure to the hydro-boost unit. Is there a point in the pedal travel where all the pressure goes to the brakes and none to the steering? It is possible I have a small amount of air in the calipers, but generally I re-bleed them a week or so after I install them. I bled them well yesterday but maybe not well enough.
 
I don't think so...I gravity bled the calipers until fluid came out of both bleeders...then pressure bled several times. What about speed sensitive steering valve (can't recall what it is called)...
 
EVO My understanding is if you have air trapped in the abs unit you have to cylce it. Your evo is probaly possible but it seems suspect that you just worked on the brakes
 
Also think about: Mud or water on the belt, loose tensioner, slipping vibration damper allowing the power steering pump to stop under high load with the engine running.

Low fluid level?
 
Fluid level ok. Checked at the ski run. Belt could be loose as the indicator for the tensioner is past it's last mark, belt does not squeel...Been like that since I have owned it. Drove down to Tacoma WA this morning in heavy heavy rain and no issues.
 
Sitting still, if I have brake pedal depressed, power steering sometimes inoperative eg pulling out of a tight parking spot . Seems normal once truck is moving . I put it down to excess load on pump ?
 
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