Graco GM 3000 Instructions-Parts List Manual page 36

Displacement Pump Repair
11. Place a new O-ring (116') firmly in the cylinder
groove. See Fig. 29.
12. Coat the piston rod and packings with oil. Carefuily
slide the assembly into the top of the cylinder
(115). See Fig. 29.
13. Put the manifold upside down in a vise. Fully
thread the jam nut (117) onto the cylinder (115).
Guide the rodkyiinder assembly down through the
manifold (101). Screw the cylinder (115) into the
manifold. See Fig. 29.
a
A '
'
Torque cylinder (115)
2 intomanifold (101)
lo
53
ft-lb
(71 N.m)
Toque
intake valve (116)
Into cyimder (115)
to
107
53 ft-lb (71 N.m)
A
Piston assembly
11 6'
1 1 7 n
1 1 5 A
I I ~ Q
Fig. 29
VI
'V
05118
14.
Place the ball guide (120), stop pin (122) and ball
into the cylinder and torque to 53 ft-lb
(121') in the cylinder (115). Screw the intake valve
into the manifold. See Fig. 30.
(71 N.m). This will also properly torque the cylinder
15. Toque the cylinder jam nut (117) to 73 R-lb
(98 Nm). See Fig. 29.
16. Install the pump. See page 33.
A
Leatherpacbngs
A
tips of V-packings
A
Poly packings
Q
Lips of v-pacgngs
must face up
(71 N.m)
A
Toque to 53
ft-lb
must
face down