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Author Topic: Seized pulley?  (Read 728 times)

Offline jwebb1998

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Seized pulley?
« on: March 24, 2015, 09:18:29 PM »
Been driving the jeep around awhile.now after getting it.back on the road.  I think a pulley seized, i snapped the belt.  I can spin adjustment pulley, fan and alternator.by hand.  Should i also be able to spin the power steering pump by hand?  It wont budge.  I was only dpwn the street from my.house so i drove it home, no power steering or alternator cjarging the battery.  It also over heated spit coolant out of the cap and i could hear the coolant bubbling into the overflow tank. 

Hopefully its just the steering pump, any thoughts?

Almost forgot 1998 zj 4.0, 83k just sat for 8 years.
« Last Edit: March 24, 2015, 09:19:09 PM by jwebb1998 »

Offline HEYzipupyourfly

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Re: Seized pulley?
« Reply #1 on: March 25, 2015, 01:03:30 AM »
all of those symptoms would happen if there was no belt in play so you cannot tell anything till you remplace it and check everything.
I have seen alternators seize, Wpumps, idlers, tensioners, ac pulleys, power steering. so just go down the line.
You should be able to turn the power steering by hand but its not going to sping nice and easy like the idler pulley would. but it should still spin.
if nothing is seized you may have a bad tensioner that allowed the belt to jump.
also some aftermarket pumps and alternators i have seen the pulleys a whole tooth off in alignment before. so that could be an issue too.
good luck
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Offline jwebb1998

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Re: Seized pulley?
« Reply #2 on: March 25, 2015, 01:11:09 AM »
Pulled the steering pump, with the pump off i can turn it, but it ia very hard and alot of grinding,.going to pick up a new one tomorrow and throw it in and pray its the only problem.

Offline Posimoto

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Re: Seized pulley?
« Reply #3 on: March 25, 2015, 06:45:59 AM »
You didn't say you heard a squeal or smelled burnt rubber two things that typically happen when a pully locks up. It may have been simply a crack in the belt that eventually broke the belt.
Overheating was caused by water pump propeller not spinning do to the broken belt.
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Offline SPYDER

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Re: Seized pulley?
« Reply #4 on: March 25, 2015, 07:15:43 AM »
sounds like a seized power steering pump to me...good luck
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Offline Axle

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Re: Seized pulley?
« Reply #5 on: March 25, 2015, 07:17:10 AM »
sounds like your on the right track
85 cj-7

Offline jwebb1998

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Re: Seized pulley?
« Reply #6 on: March 25, 2015, 07:25:32 AM »
You didn't say you heard a squeal or smelled burnt rubber two things that typically happen when a pully locks up. It may have been simply a crack in the belt that eventually broke the belt.
Overheating was caused by water pump propeller not spinning do to the broken belt.

You my friend are a stickler for details, but thank you. I shouldve wrote a little more info.

Sunday while replacing the tierod and doing some other routine maintence, i noticed the belt had alot of slack so i tightened it a bit.  It is an old belt with very slight cracking.  Since then ive heard a very minor squeal here and there.  Yesterday i had it idling at the store and it shutdown.  I panicked and restarted it, i had to rev it to keep it from dying. Turned it off and loosened the belt a little, restarted it, it ran on its own, but i heard alot of squealing and a little smoke and then the belt broke.  It sounded like the engine blew up.  But after checking things out i assumed it was the steering pump pulley siezed.  So i started it up and drove it home, everything sounded normal while driving.  It was a clean break on the belt. 

I couldnt turn the pulley by hand to remove the bolts, i had to put an allen wrench on it and put alot of torque to get it to spin so i could get to the bolts.  With the pump out i can turn it by hand but there is a lott of resistence and grinding noise.

Fingers are crossed its just the pump.

I know you need to use your old pulley on the new pump and you need a puller to remove it, but how do you press the pulley on to the new pump?

Thanks
J
« Last Edit: March 25, 2015, 07:27:48 AM by jwebb1998 »

Offline Twisty

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Re: Seized pulley?
« Reply #7 on: March 25, 2015, 07:42:03 AM »
It definitely sounds like you grenaded your steering pump.  I wonder if there is a chance you over tightened the belt tension and roasted the front bearing (which is sealed and not in an oil bath)?  Steering pumps should not be difficult to turn by hand, and there should be no grinding.  Was it making any funny noises? 

If you want to try, you can rebuild these pumps pretty easily for about $10.  I put up a small picture tutorial in my Thriller MJ thread in the last few pages.

EDIT: rent a puller from Advance or Auto-Zone.  The little kit will come with an installer tool too.  Do NOT use a press, hammer or vise to press the pulley on.  You can even use a bolt, washer, and nut to make a pulley press.  If you need help, feel free to ask.  I do not know where you are (I'm in Pepperell), but I have the PS pulley tool if you want to come use it.
« Last Edit: March 25, 2015, 07:44:36 AM by Twisty »
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Offline Posimoto

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Re: Seized pulley?
« Reply #8 on: March 25, 2015, 08:03:21 AM »
You my friend are a stickler for details, but thank you. I shouldve wrote a little more info.
The devil is in the detail.  :cheers:
"That's the trouble with research on the internet, there's no way of verifying its truth" --Abraham Lincoln

71 CJ5 V6/T14/D18/Warn OD (from CO)
79 CJ5 304/T-150 Silver Anniversary
79 CJ5.5 360/T-18/4.1 D-300
77 CJ5 360/T-18/3.15 D-20
77 CJ7 258 Fuel Injected T-18/D-20 (from CO)

Offline jwebb1998

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Re: Seized pulley?
« Reply #9 on: March 25, 2015, 08:18:11 AM »
Thanks twisty, ill check out the rebuild.  But i need to fet her done asap.  Unfortunently im in woostah.so it wouldnt be a quick trip to your place for the tool.  Appreciate the offer though.


 



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