Power Steering pump pulley loose - The 1947 - Present Chevrolet & GMC Truck Message Board Network

toms68cst · 07-05-2015, 06:14 PM

The power steering pump pulley (Off a 72) is loose and pretty floppy when the belt is off. I can't tighten or loosen the retaining nut more than a few degrees. Is there a key in the pulley and or nut? How does one go about tightening up the pulley to the pump?

It's noisy (Squeaky and rattly) when the engine is running it. The noise goes away when the PS belt is off.

Thanks, Tom

rustrunner · 07-05-2015, 08:14 PM

Pump pully has a key, but if it is floppy, then either the pulley is worn, or the pump shaft is worn. Straight shaft. As far as tightening the nut, it is most likely a lock nut and will be hard to turn. May have to replace the complete pump.

**davischevy** · 07-05-2015, 11:29 PM

I just had the same problem. A new (different) pulley fixed it.

**leddzepp** · 07-06-2015, 01:00 AM

Look at it from above while it is running. If the pulley "wobbles" it is bent and needs replacement. Some are bent so bad they will throw a belt. They are usually bent because of improper installation/removal using a three jaw puller and a hammer.

If it doesn't wobble and just screams while running you need a new pump.

toms68cst · 07-06-2015, 11:31 AM

Thanks everyone. That gives me a few things to check.

07-05-2015, 06:14 PM	#1
toms68cst Registered User Join Date: Jun 2000 Location: Bismarck, ND Posts: 4,277	Power Steering pump pulley loose The power steering pump pulley (Off a 72) is loose and pretty floppy when the belt is off. I can't tighten or loosen the retaining nut more than a few degrees. Is there a key in the pulley and or nut? How does one go about tightening up the pulley to the pump? It's noisy (Squeaky and rattly) when the engine is running it. The noise goes away when the PS belt is off. Thanks, Tom __________________ Unrestored 68 C-10 CST. Original 327. 4-Speed CH465. 50k or so miles. TREASURER, Drum Brake Club.

07-05-2015, 08:14 PM	#2
rustrunner Registered User Join Date: Feb 2015 Location: Bay St Louis, Mississippi Posts: 70	Re: Power Steering pump pulley loose Pump pully has a key, but if it is floppy, then either the pulley is worn, or the pump shaft is worn. Straight shaft. As far as tightening the nut, it is most likely a lock nut and will be hard to turn. May have to replace the complete pump. __________________ 1970 Custom Camper/20 1959 Morris Minor 1000 1953 Dodge B-4-KA 1953 Fruehauf 30' Lowboy 1928 Cat 30 1939 TORO Bullet Tractor

07-05-2015, 11:29 PM	#3
davischevy Senior Member Join Date: Sep 2008 Location: Harrison, Arkansas Posts: 9,787	Re: Power Steering pump pulley loose I just had the same problem. A new (different) pulley fixed it. __________________ other Larry Build thread, Arkansas K10 https://67-72chevytrucks.com/vboard/...=755797&page=5 The ability to speak several languages is an asset, but the ability to keep your mouth shut in any language is priceless.

07-06-2015, 01:00 AM	#4
leddzepp Moderator Join Date: May 2007 Location: Southern Cal Posts: 19,987	Re: Power Steering pump pulley loose Look at it from above while it is running. If the pulley "wobbles" it is bent and needs replacement. Some are bent so bad they will throw a belt. They are usually bent because of improper installation/removal using a three jaw puller and a hammer. If it doesn't wobble and just screams while running you need a new pump. __________________ 1972 C/10 Cheyenne Super SWB. Restored, loaded, slammed. 1968 C/10 50th Anniversary LWB. Unrestored, stock, daily driver/work truck. RIP ElJay RIP 67ChevyRedneck RIP Grumpy Old Man

07-06-2015, 11:31 AM	#5
toms68cst Registered User Join Date: Jun 2000 Location: Bismarck, ND Posts: 4,277	Re: Power Steering pump pulley loose Thanks everyone. That gives me a few things to check. __________________ Unrestored 68 C-10 CST. Original 327. 4-Speed CH465. 50k or so miles. TREASURER, Drum Brake Club.



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