Power Steering Pump Disassembly Help

[66 Sat]

Hi, I'm trying to fix a leak in the body of my power steering pump. I think it's the O ring that seals the pump body to the reservoir.
The pump is out, I've removed the 3 nuts that hold the front bracket to the pump (and presumably the pump to the reservoir) but it won't come apart. I've tapped it a few times with a rubber mallet but no joy.
I wasn't sure if I needed to remove the pulley, so I took the nut off the front and now the pulley moves fore and aft a little but won't come off either. I haven't got a puller for the pulley if it does need to come off.
Aside from the fore/aft movement of the pulley since I removed the nut, the pulley and shaft together move maybe 1/8" - is this normal? I'm not sure if there was movement there when I first took the pump out or only since I was wacking it with the mallet.
The pump is a Saginaw I think, out of a 66 Satellite.

 

[Mopar Hunter]

Have you removed the nuts on the back? They look like they have to come off. Here’s a couple YouTube videos.

 

[66 Sat]

I did but they are just for the rear bracket I think.
I watched that video previously but it's not relevant.

 

[powertrip]

Keep tapping (lightly) around the reservoir, it'll come off eventually.
Some movement of the pulley should be normal.
If the O-ring of the reservoir needs replacing, chances are that it's a good idea to also replace all seals inside the pump body. At least my experience.

 

[Black_Sheep]

It’s been a while since I’ve done one, but I believe the fitting on the back side of the pump where the high pressure line connects needs to be removed. It passes through the housing and threads into the pump. If that’s still in place you’ll never get it apart.

 

[hunt2elk]

@Kern Dog is the local steering pump guru.

 

[Kern Dog]

Yes....Those studs/bolts on the back have to come off as well as the 1" hex fitting for the pressure hose.

Then, you can lay the pump face down on the floor. Put your feet on each side of the pulley and pull up on the reservoir. Some tapping with a rubber mallet will help.
I have done this several times this past month.

 

[Kern Dog]

While the reservoirs changed over the years, the pump stayed the same but with some minor differences.

The one below has 2 return lines for use with a hydroboost unit.

The large hole in the middle is the pressure port. To the right is where one of the stud/bolts threads into.

 

[66 Sat]

Thanks for all the help, pump came apart fairly easily once I knew what I was doing...
I'll get some new O rings tomorrow from a local supplier, I'm sure they'll have what I need.
When I reassemble, does the part that sits against the spring need to be oriented a certain way? There is a slot in it that would allow it to be turned and 2 oil holes.

 

[Black_Sheep]

It doesn’t need to be indexed, just make sure it moves freely in the bore.

 

[Kern Dog]

The assembly goes in as shown.

 

[66 Sat]

Yeah thanks, I made note of the parts as they were falling out of the pump onto the ground while I was splitting it apart. I was just wondering the reason for the slot in the middle piece. According to Black Sheep it just spins and doesn't have any particular orientation in the circular plane. Maybe the slot is for oil to flow?
I'm actually considering the 20:1 PST manual box as I'm sick of all the leaks and am interested in the simplicity and weight savings of the manual set up.

 

[kiwigtx]

Yeah thanks, I made note of the parts as they were falling out of the pump onto the ground while I was splitting it apart. I was just wondering the reason for the slot in the middle piece. According to Black Sheep it just spins and doesn't have any particular orientation in the circular plane. Maybe the slot is for oil to flow?
I'm actually considering the 20:1 PST manual box as I'm sick of all the leaks and am interested in the simplicity and weight savings of the manual set up.

A friend of mine over here has used a few of the Borgeson power steering boxes with great success - much lighter than the Mopar box, and smaller physically.

Perfect if you are not worried about originality. Mopar Cars 1962-82

 

[66 Sat]

Thanks, I have considered the Borgenson in my plans but a few box alignment issues I've read about have put me off a bit.
We'll see.
I do like the power steering on these cars, it seems to suit the thin steering wheel, comfortable suspension and slidey seats.
Parking with manual steering used to be a workout in my old XY Falcon, especially in the Qld summer heat.

 

[Mopar Hunter]

Where’s your old d XY Falcon? Nice looking.

 

[66 Sat]

Sold in 2005. Just before prices went ballistic. The Hemi Cuda of Australia, mine wasn't genuine, but still looked identical to the one pictured and would be worth 10 times what I paid for it now ($100k AUD). Genuine GTHO's go for $700k.
It was a great car, but I never could get past the 4 door styling. I needed the 2 door coolness.

 

[copper67sat]

I was just wondering the reason for the slot in the middle piece. According to Black Sheep it just spins and doesn't have any particular orientation in the circular plane. Maybe the slot is for oil to flow?

Assuming your pump is like the ones on my 67s - see illustration - and you are referring to the "slippers" on the springs in the rotor, it absolutely does matter which way they face. Install them backwards and the pump won't make pressure. Ask me how I know.

 

[66 Sat]

Well pump has been back together since Monday. 4 new O rings from my local bearing and seal supplier. $4.
No leaks so far, steering feels great.
Many thanks for all the advice, I'd still be hitting it with the mallet wondering why it wouldn't come apart without all your help.

 

[Mopar Hunter]

Nice clean engine bay.

 

[Kern Dog]

I'd still be hitting it with the mallet wondering why it wouldn't come apart without all your help.

Mostly from me.