Broken power steering pulley shaft!

[fozzdesy2001]

Pictures once the old one comes out, waiting on correct and better line wrenches.

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.

Pictures please!!!

 

[clinebarger]

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.

 

[fozzdesy2001]

Thank you, everyone. The pump and lines are in and working. The mounting studs on the new pump were to short only found out after trying to bolt it down, more aggravation, and time to swap in the old ones. The pump I took out had a remanufactured sticker on it didn't see that until I was removing the mounting studs for the new pump, so this has been replaced at least once before. I definitely did have the wheel turned to lock while breaking, so I won't be doing that again if possible. Bleeding the air out of the lines with the truck stopped in a field was interesting. Thank you all again

 

[JackWildfeuer]

If it was a new part it must be chinessium and lacked proper fillet and if it is remaned it has been rebuilt too many times.

I like Red Line Power Steering Fluid for many reasons not that I think it would help at all in this case.

 

[JackWildfeuer]

Hydroboost is like sending your breaking request via morse code and hoping the signal makes it in time! LOL The only way to get slower is to have poorly serviced air brakes! I thought my Dadge had soft brakes that where unresponsive decades ago then I went to work for GM. Only worse was all the issues we had with Standyne Pump and putting the controller in a spot that was sure to hasten it's life with heat and vibration! LOL