M4030 Inj Pump proublems

Jdmanbrad

New member

Equipment
M5030
Apr 11, 2023
1
0
1
Tn
I’ve got a m4030 that hunts at idel. Had the pump redone because the rack was stuck from sitting. It would hunt at all rpm’s until I had it repaired but now just does it around 1000rpm and below. I has all 3 new springs but someone else installed those. I’m wondering if the may have got one of the smaller springs switched around. Can anyone tell me which one of the small ones goes inside of the larger spring? I think that one and one going to governor may be switched but don’t want to change everything not knowing which goes where. Thanks if anyone knows if there’s a way to tell the difference between them!
 

JohnDB

Active member
Lifetime Member

Equipment
M4500DT
Jun 9, 2018
396
71
28
NZ
Welcome to the forum.
These are for the S2600 engine, may be similar to your S2800, hope they help:
 

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