AB PSB 4 A injection pump

msb

Well-known Member
Shut off won't reset. Took the timing window off and the lever seems to be hard to operate. Is the governor spring supposed to reset the shut off ?Pump has an internal governor. I have 3 books on the pump and they are about as clear as mud. This is on a Massey Harris 44 Diesel.Tractor runs fine once the shut off is reset. I might as well saved my money on ordering the books and copying off the info from American Bosch.Thanks John and any other who can explain the operation of this single plunger model pump.
 

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