Graco Dyna-Star 224741, Instructions Manual

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Repair
12 308155U
Disconnecting the Reciprocator
and Displacement Pump
Refer to F
IG
. 7 for the following instructions.
Models239882, 224741, and 224742
1. Flush the pump if possible and stop it with the dis-
placement rod in the lowest position.
2. Relieve the pressure, see Pressure Relief Proce-
dure, page 8.
3. Disconnect the outlet hose rom the displacement
pump.
4. Slowly loosen the hydraulic supply (58) and return
(5) fittings to relieve any pressure, and remove the
hoses. Install plugs on the tube fittings and in the
hose ends. Check the o-rings (5a, 58a) on the fit-
tings, and replace them if they are worn or dam-
aged. See F
IG
. 4 and F
IG
. 5 and the Parts Drawing.
5. Using a strap wrench on the displacement cylinder
(108), screw it out of the pump adapter (43), and
pull it off the pump.
6. Pull the connecting rod (117) down as far as it will
go. Remove the cotter pin (118) from the bottom of
the displacement rod assembly (34), and unscrew
the connecting rod until it is free.
Model 237653
1. Flush the pump if possible, and stop it with the dis-
placement rod in the lowest position.
2. Relieve the pressure, see Pressure Relief Proce-
dure, page 8.
3. If the pump is removed the its mounting, disconnect
the hydraulic hoses, and plug all hydraulic connec-
tions and lines to prevent contamination.
4. Remove the cotter pin (A) from the top of the dis-
placement rod (B).
5. Loosen and remove the three lock nuts (C), and pull
the displacement pump down and away from the
motor.
6. Unscrew the displacement rod (B) from the recipro-
cator connecting rod (D).
F
IG
. 7
43
36,37
33
32
117
103
118
108
46 (hidden from view)
34
Models 239882, 224741, and 224742
A
B
C
D
Model 237653