Graco Husky 1590 DB3 Series Installation Manual page 16

17
2
___________________________
F . 8
IG
1
Rounded side must
face down (aluminum
center housing
models only).
2
Tighten screws until
they bottom out on
the housing.
___________________________
F . 9
IG
16 308441ZAH
Service
1
Insert narrow end first.
2
Grease.
3
Install with lips facing
narrow end of piston (11).
4
Insert wide end first.
10
2 3
11 4
12
15 16
1
03270
3
2
8
9
1
03271
Reassembly
1. If you removed the bearings (12, 15), install new
ones as explained on page 21. Reassemble the fluid
section.
2. On aluminum center housing models, install the
valve plate seal (9†
the valve cavity. The rounded side of the seal must
face down into the groove. See F
3. Install the valve plate (8
center housing models, the plate is reversible, so
either side can face up. Install the three screws (3),
using a Torx (T20) screwdriver or 7 mm (9/32 in.)
socket wrench. Tighten until the screws bottom out
on the housing. See F
4. Install an o-ring (17†
the pins and o-rings. Insert the pins into the bearings
(15), narrow end first. See F
5. Install a u-cup packing (10†
piston (11), so the lips of the packings face the
narrow end of the pistons. See F
6. Lubricate the u-cup packings (10†
pistons (11). Insert the actuator pistons in the
bearings (12), wide end first. Leave the narrow end
of the pistons exposed. See F
7. Grease the lower face of the pilot block (18†
install so its tabs snap into the grooves on the ends
of the pilot pins (16). See F
8. Grease the o-ring (6†
block (7). Push the block onto the valve carriage (5).
Grease the lower face of the valve block. See F
9. Install the valve carriage (5) so its tabs slip into the
grooves on the narrow end of the actuator pistons
(11). See F . 7.
IG
10. Align the valve gasket (4†
holes in the center housing (1). Secure with six
screws (3), using a Torx (T20) screwdriver or 7 mm
(9/32 in.) socket wrench. Torque to 50-60 in-lb
(5.6-6.8 Nm). See F
) into the groove at the bottom of

. 9.
IG
) in the cavity. On aluminum

. 9.
IG
) on each pilot pin (16). Grease

. 8.
IG
) on each actuator

. 8.
IG
) and actuator

. 8.
IG
. 7.
IG
) and install it in the valve

) and cover (2) with the six

. 6.
IG
) and

. 7.
IG