Power steering pump gave it up, fluid puking out, Tried a small bottle of lucas stop leak, seemed to help but it was probably more wishful thinking.
I'm thinking about trying it one more time but either way the pump has gotta go..
Was going to get a motorcraft pump but than I remembered about the saginaw pumps.
Which ones fit our trucks exactly? Any modifications need done to make it fit?

 

While I have yet to do a saginaw pump swap, my research has revealed you need the bracket along with the pump and easiest place to find them is out of 460 vans and motorhomes.

My parents have a rotting c-class 460 motorhome that I plan to steal the pump from when they decide to scrap it or have someone haul it off.

 

I would get the complete motor as well. It should have the rear sump oil pan on a c class motor home.

 

What is on there now? Other than the present leak, has it given you any trouble? I'm scratching my head, wondering why you're even thinking of swapping to a different style. If the existing pump is original, that's over 30 years of faithful service. Just not sure what's your motivation for all that extra work to find the the correct brackets, etc., considering a stock replacement will practically jump out of the box and install itself.

Whatever you do, treat the pulley like a fragile butterfly. You'll have to swap it over to the new pump. Replacements are very hard to find, so don't damage it. Make sure to use the proper puller. A cautionary "Don't let it happen to you" story here:

https://www.ford-trucks.com/forums/1...ng-pulley.html

 

I have no idea what is on there, possibly original.
When I bought it over a yr back, the fluid was black as diesel oil. Doesn't mean the pump was original though just neglected ..
I read the post about the pulley. As for why swap to different? no reason other than I hear they are rock solid.
I'm not that motivated to do any swaps or the such, I'm not out plowing or rocking with it, just rather not have to touch it again. only motivation is laziness in not doing a job again.

 

The Ford pump will do that just fine for ya the Saginaw is really only needed if you are doing lots of off-roading or maybe plowing or racing. The Ford pumps typically give 100k Miles plus of service as long as type F fluid is used in the system

Before you swap the pump I would flush the system with some nice new Type F since what is in there is crap...

 

Well that might explain why my pump crapped out over 100k and I put mercon in it. I flushed out that old crap after I picked up the truck.
Glad you chimed in, I'll make sure to pick up some more type F for the new pump. I thought they switched to mercon in the 80's and the 70's were type F

 

Transmissions switched to Mercon around 77, Power Steering systems used Type F till 96-98

 

Transmissions switched to Mercon around 77, Power Steering systems used Type F till 96-98

 

I follow you but let me ask this ignorant question, could I stick with mercon using a new pump?
I don't see why not unless there is an issue with seal compatibility?it's a hydraulic fluid in this situation right?

 

I would use "power steering fluid" you can get off the shelf before I used the thinner mercon. The good thing about the type F is it's colored red, so if you have a leak up front it can narrow it down for you a little bit. The power steering fluid you buy in the store looks like motor oil when it has leaked out.

P.S. Whatever pump you buy, spend a little extra and get the one with the reservoir already on it. I tried putting my old reservoir onto just the rebuilt pump, it's not as easy as it looks to try and keep it from leaking.

 

Nope use Type F

The Saginaw pumps are less fussy but you will torch a Ford pump or severely shorten it;s life span by using anything else besides Type F.

Type F has a very aggressive additive package this includes anti forming and anti-cavitation. The aggressive anti-cavitation additive is not found in Mercon or off the shelf generic power steering fluids. I'm sure we have all heard fords with whiny P/S pumps that whine is in part cavitation tearing the pumps vanes and housing apart. Type F is a frictional fluid this allows for the pump's vanes to seal with lower seat pressures Mercon and off the shelf P/S fluids are a non-frictional fluid and the vanes in Ford pump will not properly seal to the housing and will bypass promoting cavitation in a fluid without an aggressive anti cav package.
There is far more to it than just being a hydraulic fluid.

Ford Speced Type F in these systems for a reason. So don't be a fool and do like the above suggests and use off the shelf P/S fluid.

Type F will give you the best performance the lowest operating temps and the longest life of the components in the system..

 

I knew better to use power steering fluid.
I appreciate the more in depth explanation of the ford power steering pump. I have no issues using type F I have a quart on my shelf for the 79.
I don't know why I thought mercon was ok to use in it though lesson learned even though it was probably on its way out if it was original.

 

It is like transmissions you can dump type F into a Dexron/Mercon trans with no ill effects (other than firmer shifts) if you put Dexron/ Mercon into a Type F trans you will shred it.

The same applies to PS systems you can use Type F in Dexron P/S system with no ill effects (it may actually help a marginal system) But putting Dexron/Mercon into a Type F P/S system will have negative effects.