32 Installation, Operations & Maintenance Manual
Reassembly
1. Place pump on its side with diaphragm cavity
facing up.
2. Install contour plate(s) (282) into position in
the housing and/or diaphragm head (330), as
appropriate.
3. Carefully center diaphragm (290) in the shallow
recess in the housing.
4. If servicing a double diaphragm style pump,
position the intermediate chamber and square
head plated pipe over the diaphragm. Fit a
second new square ring (260) (if required) into
position in the recessed square ring groove.
Carefully center the second diaphragm (290) in
the shallow recess in the intermediate ring.
5. Retain diaphragm with thin, at blade 1/2” to 1”
(12.7 mm to 25.4) mm wide.
6. Carefully position the diaphragm head and
contour plate (this diaphragm head side contour
plate is not used on some models) in place,
aligning bolts holes. Remove blade and torque
bolts as follows (See Figure 16):
a. mRoy Model A Metal Heads: 265–275 in.
lbs. (30-31 N-m) bolting torque (grade 5 or
stronger bolts)
b. mRoy Model A Plastic Heads: 60–70 in. lbs.
(7-8 N-m) bolting torque
c. mRoy Model B Metal Heads: 340-360 in lbs.
(38-41 N-m) bolting torque
d. mRoy Model B Plastic Heads: 75–85 in. lbs.
(8.5-9.6 N-m) bolting torque tie down nuts
25 in. lbs. (3 N-m).
Procedures for complete disassembly of the mRoy
pump are listed below. Some steps can be omitted
depending on which part is replaced.
4.9.4 Motor and Worm Replacement
(Figures 17 & 18)
Be certain that the motor is disconnected before it
is removed in order to replace or inspect the motor
or the gears.
Disassembly
1. Remove oil drain plug and drain oil.
2. Remove the screws that attach the motor to the
pump.
3. On plate mounted units, remove motor; the
gear shaft may come out as well. If the motor
separates from the worm shaft (640), use care
not to lose the shaft key and coil spring.
4. Remove worm assembly (120).
5. On units with API motor mount adapters;
removal of the motor and adapter together will
also lift the worm gear shaft from the pump.
Reassembly
1. Reinstall by reversing steps 1 through 5 or follow
the “motor conversion” directions.
Note: Apply sealant all around the edge and around
the 4 bolt holes of the face of the motor mount as
shown. Before you assemble the motor mount on
the pump make sure you have sealant all around
the ange and covering the 4 holes.
4.9.5 Control Spool O-Rings Replacement
(Figure 17, 19 & 20)
Occasionally, the control spool O-rings may need
to be replaced. Replacement is usually indicated if
pump delivers less rated ow than expected.
Disassembly
1. Remove E-ring (220).
2. Unscrew and remove capacity control knob
(210).
3. Remove screw (180) in threaded sleeve (170)
(capacity control).
4. Remove diaphragm head (330), diaphragm
(290), contour plate (280 & 285), and motor and
motor mount.
SECTION 4 - MAINTENANCE
To Next Page
Loading...
Need help?
General
