moyno 2000 CC, Service Manual

Page: 7 / 18

5
. Carefully pull the rotor / con rod / drive shaft assembly
embly aside for now.
kward to remove the
).
. Use a packing removal tool to remove two rings of
(151), and the last two
5 mov
1. using (140) from t adapter (10).
R -ring (530).
pter
-8. necting Rod
rt (340),
and gear joint seal (520) from connecting rod.
bolts and lock washers holding the drive
adapter (10) to the gear reducer. Pull the drive adapter from
3. It
It is sound practice to always replace packing (150) whenever
3
from the gear reducer. Place the ass
On larger sizes where it may be aw
whole rotating unit as one piece, the rotor can be remove
first. Refer to section 5-8 for joint disassembly
instructions.
5-6. Packing Housing Removal
1. Pull the packing housing (140) away from the drive
adapter (10). Remove the O-ring (530
2. Remove the gland nuts (156), studs (155), and packing
gland halves (152).
3
packing (150), two lantern rings
rings of packing (150).
OR
-7. Seal Housing Re al
Pull the seal ho he drive
emove the O
2. Carefully push the stationary seal face from the ada
housing.
3. Carefully pull the rotating portion of the mechanical seal
(150) from the drive shaft.
Rotor, Driveshaft, and Con 5
Disassembly
1. Remove the vent plug (440) and set screw (450) from the
gear joint shell (410).
2. Remove six socket head screws (430) from head ring
(420) and remove head ring and O-ring (540). Slide
connecting rod/gear joint assembly off rotor head.
Remove gear joint keys (360) and primary thrust plate
(310) from rotor (470).
3. Slide gear joint shell (410) off gear ball/connecting rod
assembly. Slide ring gear (350) off gear ball (300).
4. Clamp connecting rod (460) in vice and hold with pipe
wrench and remove lock nut (330). Remove gear ball
(300), secondary thrust plate (320), seal suppo
6. Repeat steps 2 through 5 for driveshaft joint disassembly.
NOTE: It is recommended that each time the rotor and gear
joint is disassembled, the rotor head O-ring (360) and gear joint
seal (520) should be replaced.
5-9. Drive Adapter / Gearmotor Removal
Remove the four
the reducer.
5-10. Cleaning
Clean parts in a suitable cleaning solvent.
6-1. INSPECTION
6-2. Driveshaft and Packing/Seals
1. Inspect drive shaft (400) for scoring, burrs, cracks, etc. Replace
as necessary.
2. It is sound practice to always replace O-rings and gear joint
seals.
n the pump is sound practice to replace mechanical seals whe
is disassembled. Extreme care should be taken to protect the
seal faces from damage. These are fragile; avoid touching the
faces and keep them clean.
The rubber bellows will adhere to the shaft after assembly and
must be replaced if removed from the shaft.
4.
the pump is disassembled.
6-3. Rotor
1. To check for excessive rotor (470) wear, measure the
rotor crest-to-crest diameter (see Figure 6-1.) and
compare with the following chart:
Rotor Size
Standard Crest-to-Crest
Diameter (Inches)
022
036
050
065
090
115
175
3.425
4.015
4.015
4.906
4.906
5.709
220
345
7.116
7.260
6.584
The rotor size is designated by the fourth, fifth, and sixth numbers
in the model number (i.e.,1BB065).
ure 6-1. Measuring Rotor Diameter
2. If the measured crest-to-crest diameter is within .010 in.
of the standard value, the rotor is reusable provided that:
a. The rotor surface is not cracked, pitted or deeply
grooved (.030 in. or more).
Fig
ter than .010 in.
be replaced.
uld also be
replaced.
3. Rotors with crest-to-crest diameters grea
under the standard value should generally
6-4. Stator
The best indication of stator wear (500) and the need for
replacement is a drop in pump performance. Stators with interior
surfaces that are pitted, grooved or gouged sho