Pictures, sorry for the blurry ones, shaft is 3/4 OD part that broke is only 1/2 splined new pump is going on tomorrow with new hoss and filter.
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Broken power steering pulley shaft!
- Thread starter fozzdesy2001
- Start date
I did a web search and AI claims it is common on Astros with the excuse being "hydroboost."
This makes no sense because plenty of vehicles run hydroboost with these pumps. I hate "explanations" like this that explain absolutely nothing.
Any pump should have a bypass/blowoff to protect itself from excessive loads -- it just does what it can until it can't then it just says, "Yeah......no." If not we'd have p/s pumps exploding at full lock, log splitters blowing up, 2-post lifts dying at the stops and floor jacks dropping vehicles.
So, I'm willing to accept "hydroboost" with an explanation of what's unique in an Astro vs, well, anything else
Note I'm not attacking you @dfarr67
Here's another thread about a '00 Silverado. Being 1500 and 5.3 should be GMT800 and I thought these were usually vac booster??
https://www.silveradosierra.com/threads/breaking-power-steering-pump-shafts.737765/
I've seen shafts snap a handful of times, If the pump rotor gets locked down from lets say a broken vane or the rotor itself breaking.....The shaft will snap. Nothing to do with hydroboost or Astro/Safari vans other than those vans rarely have leaky components fixed.