Diaphragm Repair - Master MVP-150XL Repair Parts

Diaphragm Repair

Repair
Diaphragm Diaphragm Repair
Manifold tubing may become hot during operation.
Prior to removal, ensure that tubing has cooled
enough to handle safely.
Disassemble the the Diaphragms Diaphragms
Disassemble Disassemble the Diaphragms
NOTE: Diaphragm kit is available. See Parts section.
NOTE: NOTE:
1. Follow the Pressure Relief Procedure, page 7
Remove power from the motor. Disconnect all
hoses.
2. Remove the manifold tubing (14).
3. Use a 13 mm socket wrench to remove the 12
screws (9) from the diaphragm covers (8), then
pull the covers off of the pump.
4. To remove the diaphragms, the piston must be
moved fully to the side toward the diaphragm to
be removed. If the pump is not attached to the
motor, turn the shaft by hand to move the piston.
If the pump is still attached to the motor, loosen
the screws and remove the motor fan cover.
Turn the fan by hand in one direction to rotate the
shaft to shift the piston to one side.
5. Hold a 28 mm wrench on the wrench flats of the
exposed piston shaft. Use another wrench (10
mm hex key) on the shaft bolt to remove it. Then
remove all parts of the diaphragm assembly.
6. Rotate the drive shaft to move the piston fully to
the opposite side, as described in step 4. Then
remove the other diaphragm. assembly.
7. To continue with disassembly, see
Disassemble the Center Section, page
3A7034A
.
11.
Repair
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