2 vs 3 v- groove power steering pulley

[Sgt Gus]

So the '87 3/4 ton, 454 has a 3-groove power steering pulley. NOT coming off.
Will a 2-groove for the saginaw work and line up? The back v-grooves are approx 5.75" diameter. BThis truck was not using the front smaller v-groove 5.125 diameter?
Press on, remote reservoir, new one on the way.
Now I need to order a pulley.

 

[ali_c20]

Do you have a pulley puller tool ?

Which groove of the crank pulley was used ?

Rockauto shows a single and double groove pulley for your truck.

https://www.rockauto.com/en/moreinfo.php?pk=12729793&cc=1059982&pt=7381&jsn=990

https://www.rockauto.com/en/moreinfo.php?pk=12729797&cc=1059982&pt=7381&jsn=989

I would wait for the new pump, test mount and look how everything lines up.

 

[Sgt Gus]

Do you have a pulley puller tool ?

Which groove of the crank pulley was used ?

Rockauto shows a single and double groove pulley for your truck.

https://www.rockauto.com/en/moreinfo.php?pk=12729793&cc=1059982&pt=7381&jsn=990

https://www.rockauto.com/en/moreinfo.php?pk=12729797&cc=1059982&pt=7381&jsn=989

I would wait for the new pump, test mount and look how everything lines up.

Yes on puller, used PB and even torch. Tore the lip, once it started, no hope, but I tried.
Yes! Rockauto has. Pump was a 12541, but Lares didn't show a pulley on their website. But there it be on Rockauto. Called them just to verify. #159 They are very (Lares) helpful.
Thanks for your help! So much time researching crap...

 

[Sgt Gus]

Ours was 3-groove but front smaller not used. So using the 2 v-groove pulley.

 

[75gmck25]

Not sure it applies to every year, but on my ‘75 there are two choices for the PS belt. And I think that is why you have a 3 groove pulley.

The longer PS belt, which was the HD cooling option, goes around the PS, crankshaft and the water pump. If the alternator belt breaks, you will still have the PS belt driving the water pump. No overheating if the alternator belt is broken or slipping.

The shorter PS belt just goes around the crankshaft and the PS pulley.

 

[AuroraGirl]

Not sure it applies to every year, but on my ‘75 there are two choices for the PS belt. And I think that is why you have a 3 groove pulley.

The longer PS belt, which was the HD cooling option, goes around the PS, crankshaft and the water pump. If the alternator belt breaks, you will still have the PS belt driving the water pump. No overheating if the alternator belt is broken or slipping.

The shorter PS belt just goes around the crankshaft and the PS pulley.

depending on engine and setup, the extra ps pump pulley slot powered some compressors (larger groove) or SMOG pumps (small groove)

 

[Sgt Gus]

I bet for smog. The 87 has/had one on passenger side below the alternator. I believe 88 had two. One on each side.
Ours has a six groove serpentine from alternator, (smog), water pump to crank. Single v-groove from crank to power steering. 2nd single v-groove from crank, water pump, power steering, and AC compressor.

 

[Sgt Gus]

Also, yesterday I realized I need the bracket off the old PS pump that the pulley didn't come off...PB, torch, Yada Yada. Got one bolt off, the 2nd...?! Well, "I fought the bolt and the hacksaw won"; repeat for triumphant song in my head! So not likely beable to repair old one for a spare.