2nd Gen Non-Engine/Transmission Changing Vacuum Pump Seal

[Junior]

Alright i am getting to replace my seal in the vacuum pump. What i have gathered it is easier to take the PS pump and vacuum pump out together. When installing it do i have to bleeed the power steering lines or what. Any tips of what you guys found to work best would be appreciated.

 

[monkeyman]

Its not a hard job. Taking off intake manifold with hose's will make it easier. You will have to bleed system when you are all done. Before driving. You raise front end up and start engine with full power steering fluid. Turn lock to lock slowly aprox 20 times each way. Checking fluid every ten times. There should be no bubbles in power steering pump when done.

Rick

 

[Fireman Dave]

We took my vacuum pump off without taking the PS pump off. It worked well - maybe just a little harder to get the vacuum pump shaft lined up on the reinstall, but overall I think it was less hassle.

 

[vssman]

Jr. ,



I'm not sure if my 96 is different than your 00 set up seeing that you have hyd assisted brakes. I'd take both pumps off as an assy and separate them on the bench. I removed one hose from the box and the other hose from the pump (where they screw into the mating parts). Again, yours might be different. If you just take the vac pump out, aligning the shafts without nicking the seal will be more difficult - not impossible, but more difficult.

 

[gonehuntingagain]

You will have to cut the PS line off of the back of the pump - they glue it on at the factory. Cut off only what you have to, there is just enough slack to compensate for what you cut off. Make sure you get a new gasket that goes between the vacuum pump and the gearcase.



I would remove the PS pump/vacuum pump as a unit to make sure you don't nick the new seal when mounting the PS pump to the vacuum pump.



It is also a good idea to put in a new cam sensor at this time because it is almost impossible to get to without removing the VP-44 or the vacuum pump. A new sensor from Cummins is about $35.

 

[Royal]

CUMMINS has a seal kit now with instructions. The PN is 4089742 . The price

is $ 7. 26.

 

[Walt-L]

I just did my VAC pump with the seal kit from Cummins and the large O-ring in the kit was way to thin so I reused the thicker orange one that was in there. I was draining my rad (doing the Evap core swap) and noticed I had ALOT of pluging on the front of the rad so I pulled the rad out to clean all the fuzz/grime off the front and noticed how EASY it would be to do the Vac pump with the rad out. So I just took the intake down tube off and Its almost like changing your air filter!!!! NO NEED to unhook the power stearing pump now, Loosen the 3 PS nuts while the vac is on the block. Then take the 2 VAC pump bolts out. once you have the unit out, NOW you can break loose the PS nut that was next to the block. Separate them! you have LOTS of room to carefully slide them back together once you have the pump rebuilt. AND the radiator was a real snap to pull out after you pop out the washer tank and coolant overflow tank. If you never cleaned your radiator, Do it first with a garden hose, blow the water out of the fins with low pressure air, then use a can of carb cleaner, let soak, then use a couple of cans of easy start spray, then rinse with the hose again (at straight on angel). Watch the black crap come flowing out of the thing!!! Killing these 2 birds with one stone is the ONLY way to do your vac pump.

 

[Junior]

thanks guys, going to try to tackle it this week