Mody Pumps MSXP4PE - Manual (Page 8)

GENERAL OVERHAUL AND OIL CHECK. (THIS APPLIES TO BOTH
MODELS
)
MOTORS ARE UL LISTED FOR APPLICATIONS IN CLASS 1, DIV 1, GROUPS C
& D EXPLOSION PROOF ENVIRONMENTS. ALL REPAIRS OTHER THAN LEAD
RECONNECTS AND OUTER SEAL REPLACEMENT SHALL BE PERFORMED BY AN
AUTHORIZED RELIANCE SERVICE FACILITY. ANY OTHER REPAIRS PERFORMED
BY THE END USER OR CUSTOMER NEGATES THE UL LISTING AND MOTOR
WARRANTY.
DIS-ASSEMBLY(REFER DRG.NO.MS/401/00
• IT IS MANDATORY THAT ALL "O" RINGS BE REPLACED WHENEVER A PUMP IS OVERHAULED
OR DISMANTLED. UNDER NO CIRCUMSTANCES SHOULD OLD "O" RINGS BE USED, EVEN IF
THEY SEEM O.K. BE CAREFUL NOT TO SCRATCH SEALING SURFACES. ALWAYS GREASE NEW
“O” RINGS BEFORE INSTALLATION.
• ALWAYS ISOLATE THE UNIT FROM ELECTRICAL POWER BEFORE ATTEMPTING ANY
OVERHAUL.
• THE PERMANENT INSTALLATION VERSION IS SUPPLIED WITH A SLIDING BRACKET FIXED
ON THE VOLUTE OF THE PUMP. LAY THE PUMP ON IT’S SIDE ON A BENCH OR OVER TWO
SUPPORTS.
• UNSCREW NUTS (10) AND REMOVE PUMP VOLUTE (1) FROM SEAL ADAPTER PLATE (8).
REMOVE CAP SCREW AND LOCK WASHER (3 & 4). SLIDE IMPELLER OF THE MOTOR SHAFT.
IF THE IMPELLER IS SLIGHTLY TIGHT USE A WOODEN MALLET TO TAP THE SAME OFF
THE SHAFT. REMOVE KEY (5) AND TRIMMING SPACERS (12). KEEP ASIDE CAREFULLY.
• THE LOWER MECHANICAL SEAL IS NOW IN VIEW. BE CAREFUL. IF THE SEAL HAS
LEAKED, THE OIL CASING MAY BE UNDER PRESSURE. USING A NOSE/CIRCLIP PLIER
REMOVE SNAP RING. THE MECH. SEAL ASSEMBLY CAN NOW BE REMOVED FROM THE SHAFT
BY HAND. BE VERY CAREFUL WITH THE SEALING SURFACES SO THAT THEY DO NOT
SUFFER DAMAGE OR GET SCRATCHED IN ANY WAY. LEAVE THE SEAL SEAT IN THE SEAL
HOUSING.
• UNSCREW NUTS (11) HOLDING THE ADAPTER AGAINST THE STATOR CASING AND REMOVE
HOUSING. EXAMINE IMPELLER, WEAR RING FOR WEAR. CHECK CONDITION OF OIL. IF
EMULSIFIED AND CONTAMINATED REPLACE OUTER MECHANICAL SEAL. IF OIL CHAMBER IS
FULL OF PUMPED FLUID WE RECOMMEND CHANGING BOTH MECHANICAL SEALS INNER AND
OUTER.