Assemble The Displacement Pump - Graco Check-Mate 800 Instructions Manual

Repair
Assemble the Displacement
Pump
1. Lubricate the intake packings and install them in the
valve body (16), with the lips of the v-packings
facing up, in the following order (see F
- the female gland (25*)
- one PTFE packing (24*)
- one UHMWPE packing (26*)
- one PTFE (24*)
- one UHMWPE (26*)
- the male gland (23*)
2. With the beveled side facing up, press the intake
valve seal (39*) into the recess of the intake valve
packing nut (15) until it snaps into place.
NOTE: The nose of the seal should be flush with or
slightly recessed into the face of the packing nut.
3. Place the flats of the valve body (16) in a vise.
Screw the packing nut into the valve body handtight.
Set the intake housing assembly aside.
4. Lubricate the piston seal (13*) and install it on the
piston seat (14). Screw the piston guide (11) onto
the seat (14).
5. Place the guide in a vise as shown in F
17, and torque the seat to 75–88 N
6. If the priming piston rod (18) was removed from
the piston (12):
a. Place the flats of the piston in a vise.
b. Use an adjustable wrench on the flats of the rod
to screw the rod into the piston. Torque the rod
to 125–137 N m (92–101 ft-lb).
•
NOTE: Be careful not to create burrs on the flats of the
rod.
7. Place the piston seat/guide assembly onto the
piston (12) so the 45° beveled seating surfaces
match.
8. Screw the displacement rod (1) into the piston (12)
hand tight.
18
9. Torque the displacement rod (1) to 339–359 N•m
. 11):
IG
. 9, page
IG
m (55–65 ft-lb).
•
F
IG
10. If the cylinder (10) was removed from the outlet
NOTE: The cylinder is symmetrical, so either end can
be the top.
11. Lubricate the seal (42*) and install it in the groove
12. Screw the packing housing (3) into the outlet
(250–265 ft-lb).
26*
1 2
16
Lubricate.
1
Lips of v-packings must face up.
2
. 11
housing (9):
a. Lubricate the seal (8*) and place it on the top of
the cylinder.
b. Screw the cylinder into the outlet housing. See
F . 13, page 20.
IG
on the bottom of the packing housing (3).
housing (9). Torque the packing housing to 203–
237 N m (150–175 ft-lb). See the Detail in F
•
page 20.
39*
15
23*
24*
1 2
25*
04225
. 13,
IG
308352E