Graco GMAX II 3900 Repair Manual page 18

4. F . 26. Close pump door and rotate latch into position.
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Do not tighten latch.
5. F . 26. Rotate pump to align with material hose. Connect
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material hose and hand tighten to 70 in-lb
F . 26
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6. F . 27. Tighten latch and rotate latch lock into locked position.
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F . 27
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18
7. F . 28. Attach drain hose to sprayer.
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F . 28
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8. F . 29. Fill pump with Graco TSL until fluid flows onto top
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of seal.
F . 29
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Displacement Pump
310893L