"djcat" wrote:

See if you can get the pumping elements delivery tested. Even if you remove one your self, pull the plunger out and have a look at it. If it is scored or grey around the end of the helix then if might not be cutting the mustard.
I changed a set on an old D8H once as it was lacking power. It made a new tractor out of it!

You don't have to send the whole IP away to have this done just the pumping element assemblies ( they are a matched pair not to be mixed up )

Cheers djcat.

So I am clear take out all 6 pumps on top and get them tested... You mention here they are a matched pair... Can someone please explain and do I need to mark each one so it goes back in same order ie cylinder???? Even for testing purposes...

Matched pair means the pump plungers are matched to the pump barrels and you do not want to mix the two. Pump assemblies should be marked as to which hole they came out of so they can be returned to match the pump lifter settings.

"Old wrote:

Matched pair means the pump plungers are matched to the pump barrels and you do not want to mix the two. Pump assemblies should be marked as to which hole they came out of so they can be returned to match the pump lifter settings.

Thanks for the explanation.

Stripping off the pumps to me is a waste of time, just test with an injector hooked up externally on the engine, No way do you have all 6 pumps knackered and lifter hights would not stop it starting up, anyhow there is a bit more to setting the lifter hight than has been pointed out as the fuel elements can also wear and need checking, you need to be removing the inlet and exhaust manifolds to see what is blowing and sucking, this is just my thoughts only. Best of Luck tctractors

I agree with TC. There is a reason it wont fire on ether, and that has nothing to do with fuel.

"tctractors" wrote:

Stripping off the pumps to me is a waste of time, just test with an injector hooked up externally on the engine, No way do you have all 6 pumps knackered and lifter hights would not stop it starting up, anyhow there is a bit more to setting the lifter hight than has been pointed out as the fuel elements can also wear and need checking, you need to be removing the inlet and exhaust manifolds to see what is blowing and sucking, this is just my thoughts only. Best of Luck tctractors

Do yourself a favor George , and listen to what Tony is telling you .Tony is very hands on and has worked on this machines .So listen to what he is saying .

I don't agree, to many variables. Get the fuel items tested so that you know they are ok then move on to the next issue. Yes, I would agree that from the beginning it appears to be a compression/aspiration problem. That's what a leak down test would have revealed. Removing manifolds for port inspection would be the next logical step. Tony may be the man but he's miles away looking through the same key hole as the rest of us.

Bang on O.M. it's all a bit long distance, my thoughts would be to do a quick test on the pumps hooked up to an injector, then strip off both manifolds and see what is blowing when it should not?? tctractors

"tctractors" wrote:

Bang on O.M. it's all a bit long distance, my thoughts would be to do a quick test on the pumps hooked up to an injector, then strip off both manifolds and see what is blowing when it should not?? tctractors

Apparently you have not watched his latest video on testing with injector capsules hooked up to lines external to the chambers. To many leaks along with pissing capsules. Finger tight on the capsules apparently doesn't seal. Tightening with pliers might cut down on leakage but I'm reluctant to recommend that.

"Old wrote:

Apparently you have not watched his latest video on testing with injector capsules hooked up to lines external to the chambers. To many leaks along with pissing capsules. Finger tight on the capsules apparently doesn't seal. Tightening with pliers might cut down on leakage but I'm reluctant to recommend that.

I know there has been a lot of talk of testing injection capsules by screwing them on the loose threads of the adapter. I have never tried it but I think it would make sense to use an old pre chamber to mount the capsule for an external test.