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Post Info TOPIC: pulleys and belts


Kemptville Ont Carpenter/Renovations

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pulleys and belts
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Here is a picture of my A/C and alternator and power steering.  The belts in the picture are wrong, it was to check and see if it looked right.  I am wondering what is the best way to have the belts.

Option # 1 one belt goes from the A/C to the crank to the water pump and back to the A/C.  That is the line of grooves closest to the front of the truck

                one belt goes from the crank to the power steering and back to the crank.  That is the next set of grooves back.  Middle groove on the crank pulley.

                one belt goes from the water pump to the alternator and back to the water pump.  Also on the next set of grooves back but doesn't touch the crank.

This set up would be close to what you see in the picture.

Option # 2 A/C belt is the same as above

                one belt goes from the crank to the power steering to the alternator to the water pump and back to the crank

The challenge is the pulley grooves for the power steering and alternator are in the same plane and I have not been able to find a different pulley for the power steering to move it closer to the motor.  I have a three groove pulley on the crank but right now the third groove (closest to the motor) is not being used.

20201115_122618.jpg



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http://lightspeedmetaldesign.com/

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All 3 belts need to wrap around the crank pulley. Each load (component) needs it own drive, if not you will forever have belt slippage and squeals.


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Niagara Falls Member

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I,m thinking all belts should be driven off of the crank unless you are partial to belt squeel.

 



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Kemptville Ont Carpenter/Renovations

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I get what you are saying. I'm having a hard time finding a power steering pulley with more off set. They all look the same to me when I look on websites.

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Kemptville Ont Carpenter/Renovations

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Looking at this last night I see another option I think
Alternator goes to crank on pulley groove closest to motor only
Power steering goes to crank and water pump using middle groove on crank
A/C goes to front groove of crank and up to water pump
Would that work?

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http://lightspeedmetaldesign.com/

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That should work. Make sure the alternator belt isn't going to rub the water pump pulley.


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Brockville On, Old Autos Star

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I have a similar set-up, from the radiator back, the front groove is ac, wp to crank, second groove is alt, wp to crank, last groove on the crank pulley to ps pump. First look at the pulleys you have, water pump pulley should be a 2 groove, crank pulley should be 3 grove, ps runs from the back groove on the crank pulley to the ps pump. If want to have a look send a PM, only a half hour away.

Last thought is you need a double groove PS pulley and you need to use the rear groove, won't work with single groove PS pulley. This is the way GM ran the pulleys/belts from the factory.

IMG_0737.JPG



-- Edited by oldkoot on Tuesday 17th of November 2020 03:57:59 PM



-- Edited by oldkoot on Tuesday 17th of November 2020 04:03:20 PM

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Kemptville Ont Carpenter/Renovations

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For the belts, is there any difference between the ones with the notches and the solid ones? For measuring other than length is there anything else to consider? If I take a piece of rope and make it go around the pulleys and take it to the local TSC or CTC will that work or do I need to go somewhere else? Is there different types of belts?

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Tin basher Metal shaping guy

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I sacrifice an old belt by cutting it, wrap it around and measure the gap. Add the gap to the old belt you have and that's the length.
A rope may not ride in the same place as a belt.

Buy from somewhere they have stock and get extras, longer and shorter.
Return the ones you don't need.

The notched belts look cool. Only reason they would be better...or worse, depending if you like the look.


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Kemptville Ont Carpenter/Renovations

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I found a drawing for a 2 groove pulley. Looks like that is the solution. Smarter now than yesterday. Just money. Don't need it anyway, do I?

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