308443 19
Service
Diaphragm Repair
Tools Required
• Torque wrench
• 10 mm socket wrench
• 19 mm open–end wrench
• Adjustable wrench
• O-ring pick
• Lithium-base grease
Disassembly
NOTE: A Fluid Section Repair Kit is available. Refer to
page 27 to order the correct kit for your pump. Parts
included in the kit are marked with an asterisk, for
example (401*). Use all the parts in the kit for the best
results.
WARNING
1. Relieve the pressure. Disconnect all hoses.
2. Remove the manifolds and disassemble the ball
check valves as explained on page 18.
3. Using a 10 mm socket wrench, remove the screws
(106 and 112) holding the fluid covers (101) to the
air covers (23). Pull the fluid covers (101) off the
pump. See Fig. 12.
You must torque the eight long screws (106) first, then
the short screws (112). Torque to 130 to 150 in-lb (14
to 17 N-m). See Torque Sequence, page 32.
Arrow (A) must point toward air valve (B).
B
101
A
2
2
1
113
106
112
1
1
23
Fig. 12
To reduce the risk of serious injury whenever you are
instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 12.
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