Hitachi GMAX II 3900 - Manual (Page 17)

Displacement Pump
310893L 17
e. Twist latch u-bolt back from pump door outer edge
f. Place u-bolt on pump door protrusion
F IG . 20
8. Ratchet pump door forward.
F IG . 21
9. Open pump door.
F IG . 22
10. F IG . 23. Pull out pump pin and place in pin holder
F IG . 23
Installation
1. F IG . 24. Adjust piston rod with pin holder to pull out piston
rod. Tap piston rod on hard surface to push in piston rod.
2. Push pump collar flush with bearing housing ledge to be
able to close pump door.
F IG . 24
3. F IG . 25. Slide pump into connecting rod. Push pump pin until it
is fully retained.
Note: Pin will snap into position.
F IG . 25
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