Graco GT 750 Instructions Manual page 10

Service
Reassembly
1. Apply a thin layer of grease to o-ring (17*) and
throat seal (19*)and install parts in pump base (21)
(F . 9).
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2. Apply a thin layer of grease to o-ring (29*) and
install o-ring to packing gland (2). Tighten down
packing gland (2) to pump base (F
NOTE: Throat seal (19*) should be installed with the
lips pointed down towards the bottom of the pump.
2
29
19*
21
17 *
F . 9
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3. Reattach pump base (21) to air motor (1) using 3
mounting bolts (23). Torque mounting bolts to 60
ft-lb (81.35 N•m) (F
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21
23
F . 10
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10
. 9).
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. 10).
4. Replace piston seal (22*) on valve housing piston
(7) (F . 11).
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5. Screw the connecting rod (4) into the valve housing
(6) and adjust the ball travel as instructed in Check
Valve Adjustment on page 12 Tighten nut (5) to 60
ft-lb (81.35 N•m) (F
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5
4
22*
7
F . 11
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6. Apply a thin layer of grease to piston seal (22*).
Reinstall down tube (20) into pump base (21).
Torque to 100 to 150 ft-lb (135.6 to 203.4 N•m) (F
12).
21
20
F . 12
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. 11).
6
3A5363B
.
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