Mody Pumps G 806 T - Manual (Page 8)

6. THE SEAL CHAMBER CONTAINS APPROX. 6.5 LITERS OF OIL. THE LEVEL AND CONDITION
OF THE OIL SHOULD BE CHECKED EVERY SIX MONTHS. UNSCREW THE OIL PLUGS (79) AND
POUR OUT SOME OIL. NOTE THAT THE OIL GETS A SLIGHTLY DARKER SHADE, BUT THIS IS
NORMAL AND IS NO CAUSE FOR WORRY. IF THE OIL IS EMULSIFIED BY WATER, THE SEALS
HAVE WORN OUT AND MUST BE REMOVED FROM THE ROTOR FOR FURTHER ACTION.
7. LAY DOWN THE PUMP AND REMOVE THE REMAINING PARTS. UNSCREW NUT (33) AND
REMOVE LOCK WASHER (34) (USE IMPELLER SPANNER (T7009) TO HOLD IMPELLER WHILE
UNSCREWING NUTS) AND SLIDE OFF IMPELLER (36) FROM SHAFT. THEN REMOVE TRIMMING
SPACERS (37) AND SAND GUARD (75). THE SAND GUARD IS LIGHTLY PRESS FITTED IN THE
SEAL HOUSING (38). THIS CAN BE REMOVED BY MEANS OF A SCREWDRIVER.
8. UNSCREW NUTS (32) AND FOUR STUDS (19) AND REMOVE WEAR PLATE (39). THIS CAN
BE EASILY DONE BY INSERTING TWO SCREWDRIVERS BETWEEN WEAR PLATE AND LOWER
BRACKET (17) AND PRYING THE WEAR PLATE LOOSE. ALL THE PUMP PARTS HAVE BEEN
DISMANTLED. REPLACE WORN PARTS.
9. THE OIL DIAPHRAGM (71) IS NOW IN VIEW. UNSCREW BOTH THE OIL PLUGS (79) AND
DRAIN OUT THE OIL FROM THE OIL CHAMBER. UNSCREW SOCKET HEAD SCREW (18) AND
REMOVE OIL BAG RING (20). TURN OIL DIAPHRAGM INSIDE OUT AND REMOVE SMALL OIL
CLAMP BY UNSCREWING SCREW (46). REMOVE OIL DIAPHRAGM. SLIDE OFF CAP FOR CIRCLIP
(76), OUTER CIRCLIP (77) FROM ROTOR SHAFT AND REMOVE LOWER MECHANICAL SEAL. BE
VERY CAREFUL IN HANDLING THE TUNGSTEN CARBIDE SEAL FACE. LEAVE STATIONARY
TUNGSTEN CARBIDE SEAT IN THE SEAL HOUSING (38). UNSCREW FOUR NUTS (51) AND PULL
OUT SEAL HOUSING (38). THE STATIONARY TUNGTEN CARBIDE SEAL FACE WILL COME OUT
WITH THE SEAL HOUSING. HANDLE THE FACE CAREFULLY. THE UPPER MECHANICAL SEAL IS
NOW IN VIEW. REMOVE THE UPPER SEAL IN THE SAME WAY AS THE LOWER SEAL.
10. REMOVE THE FOUR NOS. DEEP SEATED CAP SCREWS (18) THAT HOLD THE LOWER
BEARING BRACKET AGAINST THE INNER CASING. THERE ARE FOUR NOS. TAPPED THROUGH
HOLES IN THE LOWER BEARING BRACKET. BY USING THE TOOLS (T9504 -- 2 NOS.) THE
LOWER BRACKET COMPLETE WITH THE ROTOR (11), BEARING (81), BEARING COVER (14)
AND TUNGSTEN CARBIDE SEAT WILL COME OUT WITH THE LOWER BEARING BRACKET. REMOVE
BOLTS (83) AND REMOVE BEARING COVER. PULL OUT ROTOR WITH BEARING FROM LOWER
BEARING BRACKET. (IF THIS IS DIFFICULT USE A HAND PRESS TO REMOVE ROTOR FROM
BEARING BRACKET. ENSURE NO DAMAGE TO THE TUNGSTEN CARBIDE SEAT IN BEARING
BRACKET). THE TC SEAT WITH CUP SEAL HOLDER CAN NOW BE PUSHED OUT FROM THE
BEARING SIDE BY GENTLY TAPPING THE SAME. (USE FINGERS OR A NYLON TIPPED LIGHT
HAMMER ONLY).
11. CHECK BOTH UPPER AND LOWER BEARINGS (10 & 81) FOR ANY RADIAL OR AXIAL PLAY
OR ANY ABNORMAL NOISE WHILE SPINNING THE SAME. CHECK FOR ANY LEAKAGE OF GREASE
THROUGH THE SHIELD OF THE UPPER BEARING. IF BEARING SEEMS WORN OUT OR ANY
GREASE LEAKAGE IS OBSERVED, REPLACE BEARING. (DO NOT USE ANY STANDARD BEARING
PROCURED FROM THE MARKET. THE PUMPS USE BEARINGS WHICH ARE PRE-FILLED WITH A
SPECIAL HIGH TEMPERATURE GREASE AVAILABLE FROM US READILY).
12. THE TOP BRACKET (7) IS HELD IN POSITION BY FOUR STUD BOLTS (5) ON THE INNER
CASING. UNSCREW THE NUTS AND REMOVE THE INNER CASING WITH THE HELP OF PULLER
FOR STATOR (T8006). ALTERNATIVELY TWO SCREWDRIVERS MAY BE USED TO PRY THE TOP
BRACKET FROM THE STATOR.
13. THE STATOR IS SHRINK-FITTED IN THE INNER CASING. THE STATOR CAN NOW BE
CHECKED FOR ANY ELECTRICAL FAULTS.