Displacement Pump - Graco G-Max 7900 Instructions Manual

Displacement Pump

Displacement Pump
Removal
1. Flush pump.
2. Cycle pump with piston rod (222) in lowest position
(F . 23).
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33
F . 23
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3. Relieve pressure, page 6.
4. Remove suction tube (30) and hose (33).
5. Use screwdriver to push out pump pin (101) (F
24).
Detail A
F . 24
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22
6. Loosen locknut by hitting firmly with a 20 oz (maxi-
F . 25
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222
NOTE: See manual 308798 for pump repair instruc-
tions.
Installation
9024C
30
9024B
If pin works loose, parts could break off due to force
of pumping action. Parts could project through the air
and result in serious injury or property damage. Make
sure pin (101) and retaining clip (20a) are properly
installed. See Detail A. Fig. 18.
If the pump locknut loosens during operation, the
.
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threads of the bearing housing will be damaged.
Make sure locknut is properly tightened.
20a 1. Pull piston rod out 1.0 in. Screw in pump until holes
101
9019B
F . 26
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2. See Detail A (F
mum) hammer (F . 25). Unscrew pump.
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NOTICE
in housing plates and piston rod align (F
. 24). Push pin (101) into hole until
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retaining clip (20a) snaps over pin.
9
. 26).
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1.0 in.
9
308870G