2H injector line fitting to IP, how to remove?

Submitted: Wednesday, Oct 07, 2015 at 18:16
ThreadID: 130534 Views:3081 Replies:5 FollowUps:3
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hi folks,
am having a knowledge issue with the injector lines coming from the IP...
There is two nuts on the line fitting that comes from the injector pump, ie, the fittings on top of the injector pump, a 22mm and 17mm.
Does this fitting unscrew? That's why there is two nuts there right, to uncouple them?
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Reply By: Ross M - Wednesday, Oct 07, 2015 at 18:37

Wednesday, Oct 07, 2015 at 18:37
Wrong!

The top cap like nut fastens/seals the pipe to the lower section.
That lower section is a sleeve arrangement which screws into the inj pump body and holds the Injector pumping element in place. DON'T unscrew it.

The top one can be undone with a close fitting open end spanner which has sufficient thickness not to flex and round the nut. OR use a heavy section, pipe ring spanner, which will provide enough grip to allow loosening to happen while you hold the lower with similar tools.
AnswerID: 591321

Reply By: Corncob - Wednesday, Oct 07, 2015 at 19:28

Wednesday, Oct 07, 2015 at 19:28
The 22 mm is the Delivery valve holder which screws into the Pump,the 17 mm is the injector line which goes up to the the injectors,to remove the line sometimes you have to use a 22mm pipe spanner to hold the valve holder and at the same time use a 17mm spanner to undo the line
AnswerID: 591322

Reply By: LandCoaster - Wednesday, Oct 07, 2015 at 22:15

Wednesday, Oct 07, 2015 at 22:15
thanks for your posts, if i did manage to unscrew one but not remove it is there any recovery?
AnswerID: 591331

Reply By: pop2jocem - Wednesday, Oct 07, 2015 at 23:37

Wednesday, Oct 07, 2015 at 23:37
The bottom "nut" is the delivery valve holder, best you dont undo that one. If is has unscrewed a bit while trying to undo the top pipe retaining nut best to torque it back up to the correct tension. I don't have access to my books at the moment so I can't give you the correct torque. A fuel injection shop should be able to give you that figure. There should be a copper sealing washer under it.

Cheers
Pop
AnswerID: 591336

Follow Up By: LandCoaster - Wednesday, Oct 07, 2015 at 23:56

Wednesday, Oct 07, 2015 at 23:56
i got the dvh most the way out but didtnt clear the bore totaly of thread - so the spring under the didnt fire up at me.... reading the manual there is nothing above the spring and the rail shud be holding the lower assembly in place, i doubt it floats.
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FollowupID: 859394

Reply By: Ron N - Thursday, Oct 08, 2015 at 00:10

Thursday, Oct 08, 2015 at 00:10
Landcoaster, here is the exploded view of the 2H injection pump.

Landcruiser 2H injection pump exploded view

Cheers, Ron.
AnswerID: 591337

Follow Up By: Ron N - Thursday, Oct 08, 2015 at 00:25

Thursday, Oct 08, 2015 at 00:25
The "element" is the little piston that, when lifted by the camshaft, pumps the fuel to the injector.
The tappet sits on the camshaft and the tappet raises the element inside the sleeve as the camshaft turns.
Each time the element is raised as the camshaft rotates, it injects a charge of fuel.
The rack is connected to the pinion (22155), and when the rack position is altered by altering the accelerator position, the element is turned inside the sleeve, which alters the amount of fuel injected.

The clearance between the element and sleeve is about 1 micron or less (.00005") - it is critical that you DO NOT get any dirt of any kind into the element assembly or you will destroy the element, because the tolerances are so close, and the injection pressure level is high.

Cheers, Ron.
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FollowupID: 859395

Follow Up By: LandCoaster - Thursday, Oct 08, 2015 at 10:34

Thursday, Oct 08, 2015 at 10:34
many thanks Ron, seeing that assembly of small is scary exciting, so complex. Did you read the assembly instruction for this part, bits o' wire (sst's) required to sort the cylinder... many thanks agiain
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FollowupID: 859401

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