Installing Pump - Graco A Series Instructions Manual

4. Use a screwdriver to push the retaining spring (F)
up and push out the pin (G).
5. Loosen the screws (H) and remove the pump.

Installing Pump

(F . 1 and F . 2)
IG IG
1. Mount the pump on the drive housing. Tap it into the
alignment pins with a soft hammer. Tighten the
screws (H) to 50 ft-lb (68 N.m).
2. Align the hole in the rod (107) with the connecting
rod assembly (J). Use a screwdriver to push the
retaining spring (F) up, and push in the pin (G).
Push the retaining spring into place around the con-
necting rod.
J
123
F . 2
IG
Be sure the retaining spring (F) is firmly in the groove
all the way around, to prevent the pin (G) from working
loose due to vibration. See Fig 2.
If the pin works loose, it or other parts could break off
due to the force of the pump action. These parts could
be projected into the air and result in serious injury or
property damage, including the pump connecting rod
or bearing housing.
3. Replace the o-ring (J) if worn or damaged. Recon-
nect the suction and drain hoses.
308190M
4. Tighten the packing nut (102) just enough to stop
Disassembling the Pump (F
G
F
102
H
TORQUE TO
50 ft-lb (68 N.m)
F
05897
1. Remove the intake valve (118). See page 4.
2. Unscrew the packing nut (102) and plug (123).
3. Use a plastic mallet to tap the piston rod (107)
4. Remove the throat packings.
5. Loosen the jam nut (117). Remove the cylinder
6. Clamp the flats of the piston rod in a vise. Use an
7. Remove all parts from the piston valve (108).
leakage, but no tighter. Fill the packing nut/wet-cup
1/3 full with Graco TSL. Push the plug (123) into the
wet-cup.
123
102
*103
*104
105*
lips
down
*113
*106
101
117
*116
115
. 3
IG
down, and then pull the rod out through the bottom
of the cylinder.
(115) and the o-ring (116*).
open-end wrench to loosen the nut (110) and then
unscrew the piston valve (108).
Displacement Pump
. 3)
IG
107
109*
110
111
112*
lips up
114*
For
125*
Models
lips
235699
down
and
241320
126*
only
108
118
03148A
5