Power steering ID - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Sport/Truck · 08-17-2008, 10:51 PM

I need to ID this pump. It's got a 3/4in shaft with a press on pulley. The one listed for our trucks use a 5/8 shaft w/key (furthest in picture).

The keyed pump and pulley I have won't line up properly, but I think the other will line up when pressed on.
Here are some pictures of the pulleys PN'# if that helps. The first is the one with the 5/8 w/key, the other is the press on 3/4.
Thanks
s/t

**VetteVet** · 08-17-2008, 11:51 PM

here is a copy/paste by Shane that I found on search.

Shane
Von Dutch Lives!

Join Date: Jun 2000
Location: Athens, Alabama
Posts: 6,480
Re: Power steering pump help?????

--------------------------------------------------------------------------------

there is absolutely NO difference in the pumps between a small block or a big block for our model trucks, the difference is in the brackets ONLY.

early style (late 50's thru mid 60's) pumps had 3/4" in shafts with NO keyway and the pulleys were pressed on.

later (mid 60's up) style pumps had a 1/8" keyway in the pulley ... unsure of shaft size, this was pretty much the standard pump until GM went to the serpentine pulley/belt system ... and some claim the only difference then was the pulley, I can't say.

I have a ZOOP'S press on 3/4" shaft single groove pulley if you are interested, it is polished billet FORGED aluminum , not the Cheap Chinese cast version.

Let me know if you're interested & I can get you a pic or two.
__________________
Keep On Truckin'

Shane
__________________

Sport/Truck · 08-20-2008, 09:23 PM

bump

72 CustomCamper · 08-20-2008, 11:26 PM

The press on pully pump looks like a 73-up style pump...

Chuck

08-17-2008, 10:51 PM	#1
Sport/Truck Sierra Grande Club Join Date: Jan 2007 Location: New Mexico USA Posts: 2,433	Power steering ID I need to ID this pump. It's got a 3/4in shaft with a press on pulley. The one listed for our trucks use a 5/8 shaft w/key (furthest in picture). The keyed pump and pulley I have won't line up properly, but I think the other will line up when pressed on. Here are some pictures of the pulleys PN'# if that helps. The first is the one with the 5/8 w/key, the other is the press on 3/4. Thanks s/t __________________ 1971 GMC Sierra Grande, 1/2 ton short wide, original 4 bolt 010 020 block & heads. (matching #'s). 383 stroker, SMI q jet 750 cfm, Lunati Voodoo 60102 cam, Scorpion roller rockers, Spin Tech pro street mufflers with X pipe.

08-17-2008, 11:51 PM	#2
VetteVet Msgt USAF Ret Join Date: Jan 2005 Location: Kalamazoo, Michigan Posts: 8,709	Re: Power steering ID here is a copy/paste by Shane that I found on search. Shane Von Dutch Lives! Join Date: Jun 2000 Location: Athens, Alabama Posts: 6,480 Re: Power steering pump help????? -------------------------------------------------------------------------------- there is absolutely NO difference in the pumps between a small block or a big block for our model trucks, the difference is in the brackets ONLY. early style (late 50's thru mid 60's) pumps had 3/4" in shafts with NO keyway and the pulleys were pressed on. later (mid 60's up) style pumps had a 1/8" keyway in the pulley ... unsure of shaft size, this was pretty much the standard pump until GM went to the serpentine pulley/belt system ... and some claim the only difference then was the pulley, I can't say. I have a ZOOP'S press on 3/4" shaft single groove pulley if you are interested, it is polished billet FORGED aluminum , not the Cheap Chinese cast version. Let me know if you're interested & I can get you a pic or two. __________________ Keep On Truckin' Shane __________________ __________________ VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative.

08-20-2008, 09:23 PM	#3
Sport/Truck Sierra Grande Club Join Date: Jan 2007 Location: New Mexico USA Posts: 2,433	Re: Power steering ID bump __________________ 1971 GMC Sierra Grande, 1/2 ton short wide, original 4 bolt 010 020 block & heads. (matching #'s). 383 stroker, SMI q jet 750 cfm, Lunati Voodoo 60102 cam, Scorpion roller rockers, Spin Tech pro street mufflers with X pipe.

08-20-2008, 11:26 PM	#4
72 CustomCamper huh ??? Join Date: Nov 2002 Location: Fredericksburg,Va. Posts: 3,369	Re: Power steering ID The press on pully pump looks like a 73-up style pump... Chuck __________________ 90 Blazer Silverado 350w/ 700R4 and 32" Kelly's "I am a bomb technician. If you see me running try to keep up!"



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