Center
Center
Center Section
Section
Section Repair
Repair
Repair
Tools
Tools
Tools Required:
Required:
Required:
• Torque wrench
• 10 mm socket wrench
• 9/16 in. socket wrench
• Bearing puller
• O-ring pick
• Press, or block and mallet
Disassemble
Disassemble
Disassemble the
the
the Center
Center
Center Section
Section
Section
NOTE:
NOTE:
NOTE: Do not remove undamaged bearings.
1.
Follow the
Pressure Relief Procedure, page 9
Disconnect all fluid and air lines.
2.
Remove the manifolds and
check valve parts as directed in
Disassemble Ball Check Valves, page 12
.
3.
Remove the fluid covers and diaphragms
as directed in
or
Overmolded Diaphragms, page 16
NOTE: If you are removing only the diaphragm
shaft bearing (111), skip step 4.
4.
Disassemble the air valve as explained in
.
5.
Use a 9/16 in. socket wrench to remove the
screws (3) and nuts (105) holding the air covers
to the frame.
6.
Use a 10 mm socket wrench to remove the
screws (104) holding the air covers (103) to the
center housing (101).
7.
Remove the air cover gaskets (102). Always
replace the gaskets with new ones.
NOTE:
NOTE:
NOTE: If removing the diaphragm shaft bearings
(111), use an o-ring pick to remove the u-cups
(106) first.
8.
Use a bearing puller to remove the diaphragm
shaft bearings (111), air valve bearings (115)
or pilot pin bearings (113). Do not remove
undamaged bearings.
9.
Inspect the u-cups. Replace as needed.
3A6781D
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