Which seal causes the small hose on the back of the pump to leak.

Any pics

I bought a seal kit, but want to make sure I get deep enough into it to get it fixed. I thiink I'll throw
a 3200 spring in there while I'm at it.

 

Are u talking about the small rubber outlet on the back of the pump? If u are, that means fuel is getting past the washer that seals the fuel pin or diaphram in the afc housing. Remove the afc top and remove the diaphram take the washer off an check it for damage. Use a good grease on the washer it won't hurt the pump at all.

 

That where I'm talking about, I pull it apart later this weekend and check it out. Thanks

 

make shore that when you put that seal in that that small pin move freely!

 

I pulled the diaphram and fuel pin out. What I see is a nylon washer between the two, there isn't any nicks in there anywhere but it is not tight against the shaft. I just cleaned everything real good and put it back together for now, and it still leaks. The Bosch seal kit didn't have anything close to that washer in it. I'll take another look on Sun.

 

The white nylon "washer" is a spacer that limits the travel of the air/fuel control pin. If fuel is coming out of the vent on the rear of the IP it may be the "o"ring that seals the small pin that rides on the AFC pin. To replace the "O"ring you will need remove the top of the pump to get to it. Then you will have to remove the pivot pin and link that is in the underside of the top. My pin was pressed in with a hardened ball on each end that were crimped in place. It was a real PITA without the right tools.

 

Where did you git your Bosch seal kit? I'm in need of one for my leaking pump myself. Thanks, Mike

 

Hey u say it's still leaks! Remember to use grease on the oring I use white Linthum grease. As for the seal kit, I get mine from scheid . The part# is DK-121 .

 

I got mine seal kit from a local shop here in Cincy.

Thank for the advice guys, hopefully I can get to it this weekend.

 

tell us what you find out mine is leakin in the same spot. But it was ok yesterday all i did was spin the pin.

 

Well I took the the top half of the pump off to do the 3200 gov spring. Big difference in 3rd/4th gear, I can actually hear the turbo much better now. Boost is up to 20psi with the stock turbo.

I still have the leak at the AFC nipple/vent, it's a steady drip. I used plenty of grease around the washer, top of the fuel pin. The washer does not appear to have any nicks or damage but it is a sloppy fit around the fuel pin. I'm I missing something here.

 

You are looking at the wrong thing, the washer you are looking at is the stop washer for the down stroke of the fueling cone. The oring you need is 67/1/5 The pin is 67/34 in the attached breakdown.

 

So this is what I need to do.....

I looked at that when I had it apart, definetly looked like a PITA. I'll tear it apart tomorrow and pull the pivot pin and replace the o-ring on the small pin that rides on the fuel pin.

Thanks for the help guys

 

With all these leaks popping up, what are the implications of driving while leaking?

I know it makes a mess in the engine bay (or protects depending on your point of view) and drips cost $ and there's environmental issues but will it hurt the lubricating abilities of the pump or is that done via "flow"?

Mine drips (around the govenor shaft) about every 5 seconds at idle and seems to run fine otherwise. But I've not run it under a load yet. I need to haul hay before I R&R and am concerned about tearing things up.

Thanks,
KRB

 

Other than the mess and cost there's not much danger to running with a small leak. Worst case scenario is a fire, but it's unlikely as the only ignition source is on the other side of the engine. Your leak will likely increase with engine speed because case pressure is lowest at idle. You should run it up by hand to see if you are comfortable with the amount coming out at full RPM.