[blumont]

Need a little help here. I have to put a new pulley on my power steering pump but can't figure out how the heck to do it. The pump shaft is about 5/8' with 1 key. The end of the shaft has no threaded hole or anything, just smooth. The pulley has to be pressed on and then there is a nut to keep it on but how the heck can I press it on? I believe this is a saginaw pump. I looked at a few other pumps and they have a threaded hole on the end of the shaft, so with those you could use something similiar to a balancer install tool.

 

[6t7gto]

blumont,
i had the same problem.
clean the pulley shaft hole with emery paper and it will slide right on.
also, you clould clean the shaft the same way.
david

 

[136679ss]

I believe some early style pumps were pressed on, like early harmonic balancers with no retaining nut. JN

 

[blumont]

Thanks David, I guess that might be the only way to get it on


Appreciate the help

 

[JIML82]

I am a bit confused from your description of your pump. The following are the two descriptions of the driveshafts that were used in Saginaw power steering pumps.

1. All Saginaw pumps before 1975 were held onto the pump driveshaft by a nut. The driveshaft had a MALE thread (9/16-18 UNF) on the very end. The driveshaft itself was 0.62 diameter and also had a keyway for a woodruff key (1/8 x 1/2) that engaged a slot in the pulley as well.

2. All Saginaw pumps (starting in 1975 and onward) were converted to an interference fit driveshaft and pulley. The driveshaft was smooth, 0.75 inch OD, and had a FEMALE thread (3/8-16 UNC) tapped into the end. You must use a special tool to remove the pulley and you must use another special tool to install the pulley. The special tools will have a screw that threads into the end of the driveshaft and will push and pull the pulley by reacting directly against the driveshaft itself.

You MUST NOT try and just press the pulley onto the driveshaft. By reacting against the pump housing, you will break parts inside the pump. You will also note that the pulley has a machined groove around the hub. The special removal tool will have a flange that grabs the groove to remove the pulley.

These special tools can usually be borrowed from local automotive stores to get the job done.

JIML82

 

[blumont]

JIML82. I guess my description was a little vague. I have the pump you listed in #1. Is there a tool to install this pulley? I rtook the pulley off with an improvised puller which worked well, my problem is installing a new pulley


Thanks

 

[JIML82]

With #1 all you do is place the woodruff key in the driveshaft slot. Align the slot in the pulley hub with the woodruff key. Push the pulley onto the driveshaft by hand. Tighten the nut to 58 ft-lbs. You are done.

 

[blumont]

Thanks Jim, I thought it was a pressed on deal judging by the trouble I had removing the old pulley. I guess just pushing it on is too easy:clonk:


Thanks

 

[JIML82]

The nut torque along with many years of corrosion can make slip fit parts quite difficult to get apart.

JIML82

 

[Racing]

The nut torque along with many years of corrosion can make slip fit parts quite difficult to get apart.

JIML82

I agree. When removing the pulley from the old pump we ended up heating the pulley with a torch before the pulley would even budge. A little work with sandpaper allowed the pulley to slide on the new shaft nice and easy.

 

[JIML82]

I hope that you didn't "cook" the pump driveshaft seal. It is located in the pump housing but it is sealing the driveshaft right behind the pulley.

JIML82

 

[Racing]

I hope that you didn't "cook" the pump driveshaft seal. It is located in the pump housing but it is sealing the driveshaft right behind the pulley.

JIML82

I guess I didn't make myself clear. The heat was applied to the pulley while the pulley was on the old junk pump. I didn't care what happened to the seal on the junk pump. After a quick touch of sandpaper to the pulley bore the pulley slide on the new pump shaft with a little hand pressure, no heat.