Diaphragm Repair - Graco Husky 715 Instructions And Parts List

Tools Required
Torque wrench
Set of socket wrenches
Phillips screwdriver
O-ring pick
13/32" EZY-OUT bearing extractor
Rubber mallet
Lithium base grease
Vise with soft jaws

Diaphragm Repair

Disassembly
NOTE: A Fluid Section Repair Kit is available. See
page 25 for the correct kit. Parts included in the kit are
marked with an asterisk, for example (401*). Use all
the parts in the kit for the best results.
NOTE: In Step 6, use a 13/32 in. EZY-OUT (B) screw
extractor to remove the bearings (31‡). Other removal
methods may damage the pump housing (1).
NOTE: Inspect the pilot pin o-rings (28) and bearings
(27) in place. Removal will destroy the bearings and is
not required unless they are damaged. To service the
bearings, see step 6 on page 15.
NOTE: A Diaphragm Shaft Kit is available. See page
26. Parts included in the kit are marked with a double
dagger, for example (29‡). Use all parts in the kit.
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 10.
1. Relieve the pressure.
2. Remove the manifolds (102) from the covers
(101). Keep the attaching hardware. See page 20.
3. Using a 7/16" socket wrench, remove the clamp
nuts (110) and the grounding strip (111). See Fig.
19. Slip the clamps over the housing (1). Pull the
covers (101) off the housing, then remove the
clamps.
Service
4. Using 7/16 in. socket wrenches, hold one dia-
phragm shaft screw (114) while unscrewing the
opposite screw. Remove the screw and o-ring
(115). Disassemble the diaphragm assembly.
5. Pull the other diaphragm and the shaft out of the
pump housing (1). Clamp the shaft in a vise with
soft jaws (or grip the flats with a wrench) and
disassemble the remaining diaphragm assembly.
NOTE: In Step 6, use a 13/32 in. EZY-OUT (B) screw
extractor to remove the shaft bearings (402). Other
removal methods may damage the pump housing (1).
Do not remove undamaged bearings.
6. Inspect the shaft (29) for wear or scratches. If it is
damaged, check the shaft bearings (31‡) in place.
Replace parts as needed. To remove the bearings,
place a 13/32 EZY-OUT (B) in a vise (C). Position
the pump housing (1) over the EZY-OUT (see Fig.
17). Turn the housing in the direction shown by the
arrows to remove the bearing.
7. Hook the shaft seals (30‡) with an o-ring pick and
pull them out of the housing (1).
NOTE: Inspect the pilot pin o-rings (28) and bearings
(27) in place. Removal will destroy the bearings and is
not required unless they are damaged. To service the
bearings, see step 6 on page 15.
8. Clean all parts and inspect for wear or damage.
Replace parts as needed.
30‡
31‡
B
C
Fig. 17
1