Graco husky 3275, Instruction Manual

Page: 13 / 30

13
13 308639
Service
Reassembly
For steps 1 to 3, see Fig. 5.
1. If you removed the bearings (8 and 17), install new
ones and reassemble the fluid section as
explained on page 18.
2. Grease and install the valve plate seal (12) in the
groove at the bottom of the valve cavity.
3. Install the valve plate (11) in the cavity with the
counter-bore facing up. Insert the screws (3) that
hold the valve plate. Using a 7-mm or 9/32-in.
socket wrench or Torx
R
T20 screwdriver, torque
the screws to 28 to 50 in-lb (3.2 to 5.6 N
S
m).
For steps 4 to 11, see Fig. 4.
4. Grease the o-rings (19), and install them in the
housing (2). Grease the push pins, and insert them
into the bearings (17) narrow end first.
5. Install a u-cup seal (9) on each actuator piston (7),
so the lips of the packings face the narrow end of
the piston.
6. Grease the u-cup seals (9). Insert the actuator
pistons in the bearings (8) wide end first. Leave
the narrow end of each piston exposed in the valve
cavity.
7. Grease the lower face of the pilot block (16), and
install so its tabs snap into the grooves on the
ends of the pilot pins (16).
8. Grease the lower face of the main valve (6).
9. Install the main valve (6) so its tabs slip into the
grooves on the narrow ends of the actuator
pistons (7).
10. Slide the pilot block (16) and the main valve (6) to
one side of the valve cavity. See Fig. 4.
11. Align the valve cover o-ring (20) and cover (5) with
the holes in the center housing (2). Insert the
screws (3). Using a Torx
R
T20 screwdriver or
7 mm or 9/32-in. socket wrench, torque the screws
to 28 to 50 in-lb (3.2 to 5.6 N
S
m).
Fig. 5
12
Grease.
06324
11
3
Torque to 28 to 50 in-lb (3.2 to 5.6 N
S
m).
2
1
1
2