Quick question, would an 89 d250 have dual vacuum pumps in it? The reason I ask is that the main vacuum line from the brake booster comes down and T's, one goes to one vacuum pump and the other end of the T is plugged. Where there provisions for 2?

Thanks.

 

If its the line I think it is it went to the cruse control actuator not all came with it. thats what it dose on my 92 and a friends

 

I bought a '90 Cummins out of a Dodge 250 from a junkyard that had two vacuum pumps on it.
I'll take a picture when I get home and send it to you if you want it.

Jim

 

Mine has the dual canisters on it.

 

A pic would be great. I found the second pump laying on the cross member but can't figure where it mounted.

Unless it went behind the power steering pump and the pump was swapped out for a non diesel one.

The pump that is still mounted on the motor is mounted 90 deg from crankshaft centerline and looks like it is mounted into the timing cover.

 

Here's a shot of the upper pump diaphragm in the lower left corner behind the steering box; the second one, out of sight but underneath the first behind the frame channel, mounts with the diaphragm chamber horizontal, that is, 90degrees to the one in view.
Both vacuum pumps have mounts that use four small screws to attach each pump on to a large flange with the drive gear and a drive shaft through it. The large flange bolts inside a bore in the back of the timing gear cover. The power steering pump bolts up to back end of that vacuum pump flange.
You can see the tee just above the visible chamber. I connected both hoses to the brake chamber.
Does this help?



Jim

 

One sits horizontally upsidedown and the other sits vertically on the drivers side. A factory service manual diesel supplement is what you need. Everyone with one of these CTD's needs to invest in a set of FSM's.

 

Hey dumptruck200 is that an old Binder?

 

Well it looks like I am missing some parts. Mine has no provisions for mounting a second pump between the timing cover and the power steering pump.

As far as the manual, can you just buy the suppliment for the engine? Is that a Dodge dealer or Cummins item?

Thanks

 

Hi sdstriper,
Yes it is. It's a '75 Model 200 with a Mayer dump body on it.
Couldn't stand to throw it away after I dug out my basement and used it to haul away about 100 cubic yards of dirt, so I found a wrecked Cummins, repaired it, and bought a getrag on ebay. I found a set of Kenworth hood hinges in my neighborhood and made it a tilt hood so I could get to the engine.
Runs good. I get about 13 mpg with the 410 gears in the differentials, but it beats the 7 or 8 that the 345 got.

Jim
aka dumptruck200

 

There are 2 diaphragms on our vacuum pumps, sometimes when one starts leaking they are disconnected and the line capped off.

 

the early model trucks had two diaphragm pumps on one bracket. They are the same as the ones on a 6.2-6.5 GM diesel. I thought he meant the small line coming off of the big one that goes to the cruise and the A/C controls.

 

Jim Lane beat me to it. Here's a better shot of the vacuum pumps install, along with me with the old Binder.

Jim

 

Thanks guys for the pictures, that was exactly what I was looking for. I guess it is true a picture is worth a 1000 words.