530 ck wont start

[TraderMark]

Those seals are very flexible and thin, so you must take care when installing them. Of course they are shaped like umbrellas and are installed back to back. The first one is the one you have to worry about the most since it's in the inverted position going into the pump body and it keeps diesel from entering the crankcase.
Some people slide the pump onto the shaft up to the seal, then take a smooth, blunt tipped, small screwdriver to press the seal's edge down, moving around the shaft as they go and tilting the pump just enough to get the edge of the seal into the pump bore as the screwdriver pushes it down. They do this until they've worked all the way around the shaft. I always have a couple of spares with me when I change a pump just in case.

The special tool is just a pair of small tongs with a portion of each leg fashioned into a half circle that's the same radius as the pump shaft. Slip the tool over the seal, squeeze the handles together to compress the seal, then slide the pump against the tool, carefully pushing the tool off the seal as you push the pump on. Once you have the first seal inside the pump, repeat the process for the second seal.

If you want to buy the tool, you should be able to get it from any diesel pump repair shop and it shouldn't cost too much.

 

[joebob]

I finally got the old pump out, a very difficult job indeed. I ended up removing exhaust manifold, all the tubes, & the fuel filter housing!! I never thought I would get the nut on the pump flange nearest the engine off, it would have been impossible w/ the fuel filter housing in place, I used a crow foot, & that just barely worked. I have a rebuilt pump that I've had for 25 yrs. that I was going to install, (it's got all the wire seals, the holes are plugged, & it's been in a heated enviornment), after all that work, I'm thinking I better have this thing checked, cuz I sure don't want to do this again.I called 2 places, one wouldnt test it unless he took the top off first, he said bout $81. The other guy said it would probably need all new seals, & would be $475!!! You can get rebuilts for bout $350, which I already have. I've seen seal kits for that pump for about $30, & there's a John Deere manual on rebuilding the DGB pump, just wonder if I should attempt to fix the old one, or just take a chance & install the rebuilt one anyway. What think?
Cheers
Bob

 

[TraderMark]

Wow. Tough call. 25 years is a long time even though the pump has been inactive, sealed and in a stable environment. I'm no expert on the internal seals in these pumps but I would have to think there's some deterioration there.

$475 to tear down, repair and reseal a 4 cylinder pump is about avg for around here. But like you, I've seriously considered doing my next one myself. If you do it yourself make sure to change the fiber gear inside to a metal one. It will save you money, time and headaches in the future.

If you're comfortable with your skills and with what you read in the manual I'd say give the pump off the 530 a rebuild yourself. At least you'll have a backup pump if the rebuild doesn't work.

 

[joebob]

I was looking at the repair manual & they talk about setting fuel delivery, governor, fuel pressure ect. on a test stand. You would'nt be able to do this yourself, so? Have a look at this excelent manual in pdf. igor.chudov.com/manuals/stanadyne-roosa-master/ How important is the adjustment issue?

 

[joebob]

Also notice the rotation of the pump, should be stamped on bott.

 

[joebob]

Could'nt find rotation stamped on bott., like it says on chudov. Anybody know?

 

[TraderMark]

Pump rotation is usually indicated on the metal plate fastened to the pump but I can't remember what the code is to determine rotation.

 

[joebob]

How important is the adjustment mentioned in the manual. It says if not set right, could damage engine!!

 

[joebob]

Had the pump rebuild & the injectors too, ($530). It's back together & running fine. Thanks for all your help, guys.
Cheers
Joebob

 

[TraderMark]

Glad to hear you got 'er running again!