304 Power Steering Pump Pulley Issue

I am looking for a pulley for the pump that has the keyway and nut for a new pump I was able to pick up local NAPA store, unfortunately mine is a pressed on type. Does anyone know what years to look for and or if anyone has one for sale

 

Why would you settle for a pump that does not match? What Jeep is this for? Year/model/equipment?

 

my jeep is a 1972 model with a 304, the pump is the same it appears, and in Napa's catalog except for the mounting shaft has a key and nut, when my old pump is a pressed-on pully

 

Had your pump on your 72 been changed at some point to a later model pump? I am not sure but I am thinking that a 72-74 used a keyway shaft pump. But sometime later maybe they changed to a pressed on type pump and pulley.(late 70's) The pumps should be identical except for the pulley shaft. On a second thought when the pulley/pump change occurred may be at the same time they went from flair hose connections to o-ring hose connections. Have you looked at the rear pressure hose connection on your new pump to verify it is the same as the one on your old pump? Your 72 might have not came factory without power steering. Later someone converted to power by using a complete setup ,pump, hoses, and gear from a later model 304 that used the pressed on pulley pump, o-ring hose and low ratio power gear like from a 80 or 81 model cj. This is how I converted my 74. I hope my memory is correct on this so maybe someone can add thoughts and corrections to my comments.

 

If you still need a keyway pulley I will look around over at my brothers shop there were some of the old ham style pumps over there, but I will not be over there until sometime next week. will let you know if I have one.

 

I understood the high pressure o-ring hose uses an additional fitting that screws into the flare nut fitting on the pump. The low pressure hose slips on and clamps, no fitting neded. Thus the pump is not specific to the hoses. Supposedly you can go to the junkyard and pick the fitting off any car with the newer style o-ring hoses, and convert to o-rings.

Suggest your NAPA store should help you with this. You're paying a premium price buying from NAPA, and the counter person should be willing to pull pumps from stock to find one that matches what you have. I would only go to the older style pump if there were something about your pump that does not match the application, like pulley alignment.

They should also switch the pulley for you, or lend you the tool to switch the pulley. There is a specific puller for these pressed-on pulleys, as I recall. Autozone or Advanced has a program where you purchase the tool and bring it back for a refund, in situations like this.

https://www.amazon.com/OTC-4681-Steering-Alternator-Installer/dp/B000XSGKZI

 

X2, they are interchangeable if you need to mix and match old style pumps and later style pressure hoses or vice-versa. This can prevent having custom hoses made sometimes.

 

Thank u for the comments, Yes it is very possible it was converted, my CJ has a old history and the hoses are missing and vehicle had been in a old barn in San Martin California for over 10 yrs. The comment that the key way and nut version could be from the 72 model, I will look to in my TSM if it speaks to that. Thanks again

 

Here’s what I used to replace the bent pulley on my 74 w/304. it was also a key way. Who knows if the pump has been changed at some point. Regardless this guy should work for you.
A-Team Performance - Steel Key-Way Power Steering Pump Pulley Single Groove - Compatible with 1955-72 GM Chevrolet SBC BBC Small and Big Block Chevy SBF Small Block Ford Black https://www.amazon.com/dp/B07FMKGG2R/ref=cm_sw_r_cp_api_i_NV0MK1XZ9JDM99Q63QAA?_encoding=UTF8&psc=1

 

As best I can remember(4-5 years ago) when I did some research on pulleys around the junk yard on different motors, what I found is the GM motors used a pump just like the jeep and same shaft diameter on the keyway/nut style pulley. However the GM motors(at least the ones I looked at) all used a pulley with just a little bit more narrow belt grove than the jeep used on it's water pump/crank pulleys. Just enough that the jeep belt did not go quite deep enough into the GM pulley, at least on my conversion. I did find a pulley that had a wider belt grove on an AMC car that had a 360 in it. It appears Jeep/AMC used a unique pulley set up compared to most other auto mfgrs. Not saying the above pulley that bigjohn recommends would not work ,it should, but at least on my conversion the AMC pulley just worked a little better, the Jeep belt would just not quite go deep enough into the GM pulley. Again if I can remember correctly the jeep belt is about 5/8 in. and the GM belts were about 1/2 in. wide.
I will research my notes when I get back over to my brothers shop later this week and look around for an extra key style jeep pulley.

 

NP - glad to help.

The TSM won't cover topics like this. However, the factory parts book will. My '75 has the pressed-on pulley, and the '74-80 parts book confirms that 1975 was the first year for this style pulley and pump. The guys at NAPA gave you the right part, but there should be no functional difference between the two styles of pump.

The only possible issue is belt alignment. The water pump pulley that drives the power steering also changes for 1975, and this could shift the belt position. I suspect it does not, but it's up to you to check the belt alignment using the pump that came with the Jeep. If alignment were ok, I would stick with the style of pump you have now.

Finding the right pulley to work with the correct pump type for a 1972 adds more complication - I would stay with what's the Jeep has now if it lines up.

 

Thank you all for the many comments, I found that in my TSM 1972 it showed the keyway and nut type, I would have to guess that this was the early design and they switched sometime in the production.