Diaphragm And Center Section Repair - Graco Husky 1050HP Repair Parts

Diaphragm and and Center Center Section
Diaphragm Diaphragm and Center
NOTE: NOTE: See NOTE: Diaphragms
for replacement diaphragm kits. Center Rebuild
Kit 24W946 also is available. Parts included in the
Center Rebuild Kit are marked with an *. For best
results, use all kit parts.
Disassemble Disassemble the Disassemble the Fluid the Fluid Fluid Diaphragms
1. Follow the Pressure Relief Procedure, page
2. Remove the manifolds and disassemble
the ball check valves as explained in
Check Valve Repair, page
3. Remove the muffler (18).
4. Use a 10 mm socket wrench to remove the fluid
cover screws (5), then remove the fluid covers
(2).
5. Bolt-Through Bolt-Through Diaphragms: Bolt-Through Diaphragms: Diaphragms: Use a 15 mm socket
wrench to remove the diaphragm shaft bolt (14)
on one side of the pump. If the shaft (206)
remains attached to the bolt, use a wrench on
the flats of the shaft to remove it. Then, remove
all parts of that diaphragm assembly.
Overmolded Diaphragms: Diaphragms: The diaphragm (12)
Overmolded Overmolded Diaphragms:
on one side of the pump will screw off by hand.
The diaphragm setscrew should remain attached
to the diaphragm. If the shaft (206) remains
attached to the diaphragm setscrew, use a
wrench on the flats of the shaft to remove it.
Remove the air side diaphragm plate (11).
6. Repeat for the other diaphragm.
334390E
Section Repair Repair
Section Repair
Diaphragms Diaphragms
10.
16.
Disassemble the the Center Center Section
Disassemble Disassemble the Center
1. Use a 10 mm socket wrench to remove the
screws (5), then separate the primary air module
(101) from the secondary air module (102).
2. Remove the diaphragm (109), the air plates (103
and 105), and the set screw (104).
3. Inspect the diaphragm shafts (206) for wear or
scratches. If damaged, inspect the bearings
(203) in place. If they are damaged, use a
bearing puller to remove them.
NOTE: NOTE: Do NOTE: Do not Do not not remove remove undamaged remove
4. Use an o-ring pick to remove the u-cup packings
(202) from the primary air module and the
secondary air module. Bearings (203) can
remain in place.
5. If necessary, use a box end wrench to remove
the pilot valves (205, primary air module) or
the secondary pilot plugs (220, secondary air
module).
6. Remove the pilot valve cartridges only if
necessary due to a known or suspected problem.
After After After removing removing pilot removing pilot valves pilot
secondary secondary secondary pilot pilot plugs pilot plugs (secondary plugs
hex to remove the cartridges (204), then remove
cartridge o-rings (219). If stripped, cross two
screwdrivers in the shape of an X. Insert the
blades into the area around the 10 mm hex.
Revolve the blades against each other while
holding the tips against the outer area of the
recess to unscrew the cartridge.
NOTE: NOTE: NOTE: Do Do Do not not remove not remove undamaged remove
cartridges.
cartridges. cartridges.
Repair
Section
Section
undamaged bearings. undamaged bearings. bearings.
valves (primary valves (primary side) (primary side) side) or or or
(secondary (secondary side), side), use a side),
undamaged undamaged pilot pilot valve pilot valve valve
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