Graco GMAX II 3900 Repair Manual page 17

e. Twist latch u-bolt back from pump door outer edge
f. Place u-bolt on pump door protrusion
F . 20
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8. Ratchet pump door forward.
F . 21
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9. Open pump door.
F . 22
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10. F . 23. Pull out pump pin and place in pin holder
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F . 23
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Installation
1. F . 24. Adjust piston rod with pin holder to pull out piston
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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 . 24
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3. F . 25. Slide pump into connecting rod. Push pump pin until it
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is fully retained.
Note: Pin will snap into position.
F . 25
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Displacement Pump
ti6325a
ti6378a
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