Mody Pumps M 126 T - Manual (Page 9)

DISMANTLING (REFER DRG. DWE/005/00-- SHEET 1 & 2).
• BACK OFF THE TWO DISCHARGE OUTLET NUTS (7) AND LIFT OFF THE OUTLET (64). PUT
ASIDE THE OUTLET GASKET (63).
• BACK OFF FOUR NOS. NUTS AND WASHERS(6,7) AND REMOVE THE STRAINER (62).
• BACK OFF FOUR NOS. NUTS (7) FROM THE STUD BOLT ASSY. (54) HOLDING THE
DIFFUSER (61) AND REMOVE THE DIFFUSER.
• PULL OUT OUTER CASING (29) AND KEEP ASIDE.
• LOCK IMPELLER (58) BY MEANS OF IMPELLER LOCKING SPANNER (TOOL NO.T7001) TO
PREVENT ROTATION AND UNSCREW IMPELLER NUT (60). REMOVE LOCK WASHER (59) AND
SLIDE IMPELLER OFF SHAFT. THE RUBBER SLINGER WILL COME OFF WITH THE
IMPELLER. (IF TOOL IS NOT AVAILABLE, YOU MAY USE A GOOD STRONG SCREWDRIVER
FOR LOCKING THE IMPELLER)
• REMOVE IMPELLER KEY (56) AND REMOVE TRIMMING SPACERS (55) AND KEEP ASIDE.
• UNSCREW FOUR NOS. STUD BOLT ASSEMBLY (54) AND REMOVE WEAR PLATE (53).
• UNSCREW THE PHILLIPS SCREWS (52) HOLDING THE SAND GUARD (51) FROM SEAL
HOUSING (47).
• UNSCREW OIL PLUG (41) AND REMOVE "O" RING (40) FROM CAVITY. DRAIN OUT THE
OIL FROM THE OIL CHAMBER. THE CHAMBER CONTAINS APPROX. 150 ML OF OIL. CHECK
IF THE OIL IS EMULSIFIED. IF SO, THE MECHANICAL SEAL IS WORN OUT AND NEEDS
TO BE REPLACED. IF NO EMULSIFICATION HAS TAKEN PLACE THE MECHANICAL SEAL IS
O.K. AND THE OIL CAN BE RE-USED.
• REMOVE CAP FOR CIRCLIP (50), CIRCLIP (45) AND SLIDE OUT COMPLETE MECHANICAL
SEAL FROM THE ROTOR SHAFT. BE VERY CAREFUL WITH THE RUBBER BELLOWS AND THE
TUNGSTEN CARBIDE SEAL FACE. LEAVE THE TUNGSTEN CARBIDE SEAT IN THE HOUSING
UNLESS IT IS TO BE REPLACED.
• BY MEANS OF TWO SCREWDRIVERS LEVER OUT THE SEAL HOUSING FROM THE LOWER
BEARING BRACKET (38)
• THE COMPLETE ROTOR WITH THE LOWER BEARING BRACKET AND BEARING CAN BE PULLED
OUT OF THE STATOR CASING. USE TWO SCREWDRIVERS BETWEEN THE LOWER BEARING
BRACKET AND THE STATOR CASING (30) AND PULL OUT THE COMPLETE ASSEMBLY.
• REMOVE CIRCLIP (45), AND TAKE OFF UPPER SEAL CAREFULLY.
• UNSCREW HEX. BOLT (39) AND LOOSEN BEARING COVER (36). THE ROTOR COMPLETE
WITH LOWER BEARING (37), CAN BE REMOVED FROM THE LOWER BEARING BRACKET. THE
STATIONARY MECHANICAL SEAL SEAT WILL REMAIN IN THE LOWER BEARING BRACKET.
THE LOWER BEARING CAN NOW BE PRESSED OUT IF IT NEEDS TO BE REPLACED. EXAMINE
UPPER BEARING FOR RADIAL OR AXIAL PLAY AND REPLACE IF NECESSARY.
• IF STATOR CHECKS OUT O.K. ELECTRICALLY AND THE CABLE IS O.K. DO NOT REMOVE
THE TOP BRACKET FROM THE STATOR CASING. IF STATOR IS TO BE REWOUND THEN IT
IS ESSENTIAL TO DISMANTLE GLAND ASSEMBLY.
• UNSCREW NUTS (4) AND REMOVE CABLE CLAMP (2). UNSCREW NUTS (7) AND PRY OFF
CABLE GLAND (8). THE CABLE GROMMET (10) WILL COME OUT WITH THE GLAND. ALWAYS
REPLACE CABLE GROMMET. REMOVE GLAND SPACER (11) AND PRY OUT CABLE GLAND BASE
(13). REMOVE LEAD GROMMET (12) AND REPLACE. LOOSEN CABLE WIRES SO THAT
ENOUGH SLACK EXISTS SO THAT THE TOP BRACKET CAN BE DISASSEMBLED.
• UNSCREW BOLTS (24) AND REMOVE HANDLE (23). THE TOP BRACKET (22) CAN BE
REMOVED BY INSERTING TWO SCREWDRIVERS BETWEEN THE TOP BRACKET AND THE OUTER
CASING AND PRYING THE SAME OUT OR TAPPING THE OUTLET WITH A RUBBER MALLET.
DISCARD "O" RINGS.