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#1 |
Registered User
Join Date: Nov 2012
Location: Austin, TX
Posts: 205
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Problems aligning power steering pump with crank
I have a 66 fleet with factory AC and a 327 (probably not original). I have been going crazy trying to get my power steering pump to line up with my crank pulley without the alternator belt rubbing against the pump body. All my other belts seem to line up okay. I have read all the info on this forum about this, but I am still stumped. Maybe I have the wrong crank pulley. Any thoughts would be appreciated.
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#2 |
8 vehicles only 4 that run
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Location: Clemson, SC
Posts: 236
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Re: Problems aligning power steering pump with crank
Is your PS pulley a press on style? You may have enough room to pull the pulley forward some and still have plenty on the pump shaft.
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95 2500 350 w/ 3.73 ![]() 72 GMC 1500 SWB stepside 65 Chevy C10 SWB stepside 72 Chevy C10 LWB fleetside |
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#3 |
Registered User
Join Date: Nov 2012
Location: Austin, TX
Posts: 205
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Re: Problems aligning power steering pump with crank
The pulley has a woodruff key and the shaft had a nut the tightens the pulley on the shaft. I could probably make a washer with a notch for the key and get about 1/8 inch. That might help, but the nut would be slightly proud of the threaded shaft. Also, part of my problem is that the power pump is not parallel with the crank pulley. I'm not seeing any obvious way of changing the brackets. Thanks for the suggestion, it would certainly help.
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#4 |
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Location: Wisconsin
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Re: Problems aligning power steering pump with crank
Theres also several different offset power steering pump pulleys. Whats the part number stamped in the PS pulley ? Also if you can the crank PS pulley part number, this can help tell you if its the right one.
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#5 | |
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Join Date: Feb 2009
Location: southeasternfoothillsofusa
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![]() Quote:
Sam |
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#6 |
Registered User
Join Date: Feb 2009
Location: southeasternfoothillsofusa
Posts: 1,557
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Another thought: there is made a crankshaft pulley-set where the outer pulley(for the ps)fits so closely up-inside the middle pulley(for ac?)that there is almost NO space between them: maybe the thickness of a quarter at most. These 2 pulleys I speak of are made more like 2 "hugging" sheet metal pulleys rather than made of the separated, heavier cast steel(iron?) pulleys you have. Some of these pairs are spot-welded together/inseparable, while other sets will separate with a bit of effort--never seen a need to do this, though.
Look for that set & maybe it will solve your problems. Should I find a pic of a such a set, I will return and attach it. Sam |
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#7 |
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Join Date: Feb 2009
Location: southeasternfoothillsofusa
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Here's a pic of a similar crankshaft pulley-set I described earlier. The 2 outer pulleys appear inseparable--NO space between them. It appears to move outer pulley toward engine approx. 1/4 inch to 11/32 inch--about what it looks like you need. Maybe if you could find one similar...
Sam *pic orig. from unknown source--should you recognize it, I'll gladly credit him. Last edited by luvbowties; 11-05-2013 at 11:40 PM. Reason: added credit |
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#8 |
60-66 Nut
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Location: Coeur d'Alene, Idaho
Posts: 23,248
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Re: Problems aligning power steering pump with crank
To me both your crank pulleys and water pump pulleys don't look right. Although your alternator belt appears to line up good. Is the water pump pulley 2 pcs? If you can, take the crank and water pump pulleys off, lay them out on the floor and take a couple pics of what you have and their order of assembly.
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#9 | ||
Registered User
Join Date: Nov 2012
Location: Austin, TX
Posts: 205
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Re: Problems aligning power steering pump with crank
Quote:
Quote:
I can't really see any number on the inter crank pulley, which seems to be a steel pulley sandwiched in between the harmonic balancer and the outer pulley set. Does this pulley have to be removed to get the number? Thanks all for your help on this. This is driving me crazy. BTW, the PO added the power steering (factory type) and it was pieced together in the cheapest way possible. I have rebuilt everything and thanks to extra parts from "65 Chevy Lover" I was able to make it all work properly, except for the alignment. |
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#10 | |
Registered User
Join Date: Nov 2012
Location: Austin, TX
Posts: 205
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Re: Problems aligning power steering pump with crank
Quote:
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#11 | |
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Join Date: Nov 2012
Location: Austin, TX
Posts: 205
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Re: Problems aligning power steering pump with crank
Quote:
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#12 |
Registered User
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Location: Wisconsin
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Re: Problems aligning power steering pump with crank
Big question, are you trying to be original or just make it work with proper alignment ?
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#13 |
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Location: Wisconsin
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Re: Problems aligning power steering pump with crank
some options for the crank pulley, I think you have the one on the top left.
![]() There three different heights of power steering crank pulleys here, one on far right is the shortest ![]() then with the shortest ![]() then just the Power steering drivers ![]()
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IS IT an EATON or Chevrolet rear axle https://67-72chevytrucks.com/vboard/...d.php?t=843778 The hubcap thread http://67-72chevytrucks.com/vboard/s...d.php?t=702839 WANTED : 1963-1966 6 Cylinder Fan Shroud WANTED :1964-1966 PANEL TRUCK |
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#14 | |
Registered User
Join Date: Nov 2012
Location: Austin, TX
Posts: 205
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Re: Problems aligning power steering pump with crank
Quote:
Wow. Great pictures. Thanks. Yes, I think I have the tallest crank pulley (top left in the first picture) I hope this is an original style crank pulley. Where I am off compared to your photos is the power steering driver pulley. Mine is essentially flat like the picture here. However, the way it is, it is only about 1/4-3/8 back from the crank pulley outer most crank pulley. It looks like the PS pulleys you are showing would move the belt 1-2" (I am assuming rearward). I am sure I am missing something here, but not sure what. I attached a better picture of my pulleys and belts on the truck. My power steering is driven by the furthest outside pulley on the crank. Is that correct? I appreciate your help. |
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#15 |
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Join Date: Nov 2012
Location: Austin, TX
Posts: 205
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Re: Problems aligning power steering pump with crank
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#16 |
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Location: Wisconsin
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Re: Problems aligning power steering pump with crank
OK, going original . You need power steering pump pulley part number 3791943
heres one on Ebay. http://www.ebay.com/itm/68-70-Origin...#ht_750wt_1363 Their description states 6 cylinder for cars but its the only part number I come up with for our trucks other than a 292 six cylinder PS pulley. Im using several 66-72 Chevy GM parts books. Im guessing it has the right offset to move it out for the cast truck lower pulley. If someone has other part numbers please advise. You have an AC truck also, Ive seen that style of water pump pulley on 327 AC trucks before, theres also a cast iron 3 groove water pump pulley for AC trucks.
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#17 |
Senior Member
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Location: Hanford, CA
Posts: 1,027
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Re: Problems aligning power steering pump with crank
Captain is correct. You have the earlier cast crank pulley and a later model power steering setup. I've just recently gone through this and it took me weeks and a lucky find at my local pick and pull to get the power steering pulley that I need.
The pulley's for the early 70 power steering pulleys have 3 different offsets. You appear to have the one that I originally had. I don't recall coming across one that would move the belt out more; only in more. I believe you'll need to change your crank pulley to make it all align better.
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#18 |
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Join Date: Jan 2001
Location: Lincoln, Nebraska
Posts: 2,145
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Re: Problems aligning power steering pump with crank
Jon , On my '66 327 with ps truck and with the 1966 dealer installed factory air kit it had that 3791943 stamped pulley on the ps pump and uses the cast iron 2 belt crank pulley. I had a nos correct style 66 power steering pump so I found and used a nos 3791943 pulley on the nos pump and the alignment is dead on everywhere. I also believe at least in 66 to 67ish on the factory installed 327 ac trucks they used the 2nd style 3 belt heavy cast iron water pump pulley with a fan clutch. The GM accessory factory air kit appears to have provided an added single 2nd belt pulley and spacer in front of the water pump single pulley for the ac belt and of course a 5 blade fan. The fan clutch appears to have been another option from the GM parts and ordering books. With my years of experience changing out leaking WP's from bearing failures, I believe GM shortly realized this and quit using that unbelievably heavy mass hanging on that bearing due to failures and went back to using stamped steel pullies. So on mine I utilized the factory air GM kit steel pulley set up and and added a new fan clutch and cross my fingers that this holds up on a restored painted engine. My truck frame comes back from the exhaust shop this week so it's time to post some engine/chassis pictures to show what I came up with. Mark
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#19 |
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Location: Wisconsin
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Re: Problems aligning power steering pump with crank
Perfect, exactly what we needed Mark. The parts book and even my NOS truck power steering kit do not show the part numbers for the PS Pulley. Again thanks for your help in confirming this.
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#20 |
Registered User
Join Date: Feb 2012
Location: pleasant valley--placerville ca
Posts: 3,039
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Re: Problems aligning power steering pump with crank
here is my set-up short pump. this was pretty common set-up. single gv fits in the 2 gv for 3rd gv for p/s
single groove #3751232BB GM 2 groove #3744043BA
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#21 |
Registered User
Join Date: Nov 2012
Location: Austin, TX
Posts: 205
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Re: Problems aligning power steering pump with crank
Update on steering pump alignment. I ordered pulley 3791943 and I received it an put it on. It solved my alignment problem, but the pulley as wobbly and did not run true. So I talked to the guy that sold it to me and he asked more about its application. Although he is a Camaro guy, he said that a v8 usually gets a pulley number 3770509. He said he did not know the difference between the two off hand. Does anyone here know what the difference might be?
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#22 |
Registered User
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Location: Wisconsin
Posts: 3,327
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Re: Problems aligning power steering pump with crank
Well, cars used the stamped steel pulleys we posted above which are a different offset. Reason you use this PS pulley is for the odd offset of the AC system and or the cast iron crank pulleys offset for trucks only. If you spin the PS pulley you can gently tap on it with a rubber mallet and get it straighter . Ive done that before. Heres a couple pictures of the car pulleys I used in my 66 GMC Suburban project. I used the later 67-72 era PS pump and brackets as I wasn't going 100% stock. You can see how close together the crank pulleys are. The center crank groove is for the AIR but Im using car type AC brackets on this one.
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IS IT an EATON or Chevrolet rear axle https://67-72chevytrucks.com/vboard/...d.php?t=843778 The hubcap thread http://67-72chevytrucks.com/vboard/s...d.php?t=702839 WANTED : 1963-1966 6 Cylinder Fan Shroud WANTED :1964-1966 PANEL TRUCK |
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#23 |
Registered User
Join Date: Nov 2014
Location: Benton, Arkansas
Posts: 8
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Re: Problems aligning power steering pump with crank
60-66,
Do you know the part number for that power steering bracket you have? Also, the number for the crank pulley and power steering pump pulley? |
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#24 |
Registered User
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Location: Wisconsin
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Re: Problems aligning power steering pump with crank
The part number depends on what setup you are using , the stock setup or the one I posted of the engine sitting on the stand which was a combination of parts to make the large harmonic balancer of a 400 small block work in a 1966 GMC . The stock setup , cradle and adjuster bracket will not fit next to that balancer. That PS pump and brackets was from the 1968-1972 trucks.
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#25 |
Registered User
Join Date: Nov 2014
Location: Benton, Arkansas
Posts: 8
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Re: Problems aligning power steering pump with crank
Do you know the part numbers for the bracket and crank/power steering pump pulley?
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factory power steering, power steering, pulley alignment |
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