Mody Pumps NC 06360_08360_10360-M - Manual (Page 8)

7. LOOSEN NUT (30),REMOVE LOCK WASHER (31). SLIDE IMPELLER OFF THE SHAFT.
REMOVE KEY (32) AND SLIDE OFF TRIMMING SPACER.
8. LOOSEN NUTS (41)(4 NOS WHICH TIGHTEN THE PUMP BASE AGAINST THE LOWER BEARING
BRACKET (21) AND TAP OFF THE PUMP BASE. THE WEAR PLATE (36)WILL COME OFF WITH
THE PUMP BASE.
9. UNSCREW THE FOUR CHEESE HEAD SCREWS (74) AND REMOVE THE SAND GUARD (71) FROM
THE SEAL HOUSING(39).
10. THE OIL DIAPHRAGM (68) IS NOW IN VIEW. PRY OUT OIL PLUG CAPS (22) AND
UNSCREW BOTH THE OIL PLUGS (78). DRAIN OUT THE OIL FROM THE OIL CHAMBER.
LOOSEN SCREWS AND NUTS (51 & 66) FROM THE BIG OIL CLAMP (67) AND REMOVE CLAMP.
TURN OIL DIAPHRAGM INSIDE OUT AND REMOVE SMALL OIL CLAMP IN THE SAME FASHION.
REMOVE OIL DIAPHRAGM. SLIDE OFF CIRCLIP CAP (72) AND REMOVE CIRCLIP (73) FROM
ROTOR SHAFT. REMOVE LOWER MECHANICAL SEAL (75) FROM ROTOR SHAFT. BE VERY
CAREFUL IN HANDLING THE TUNGSTEN CARBIDE SEAL FACE. LEAVE THE STATIONARY
TUNGSTEN CARBIDE SEAT IN THE SEAL HOUSING (39). UNSCREW FOUR NUTS (77) AND PULL
OUT SEAL HOUSING. THE TC SEAL FACE WILL COME OUT WITH THE HOUSING. HANDLE THE
FACE CAREFULLY. DO NOT REMOVE FROM HOUSING IF IT SEEMS OK AND DOES NOT NEED
REPLACEMENT. THE UPPER MECHANICAL SEAL IS NOW IN VIEW. REMOVE THE UPPER SEAL IN
THE SAME WAY AS THE LOWER SEAL. LEAVE THE TC SEAT IN THE LOWER BEARING BRACKET
(21).
11. REMOVE THE FOUR NOS DEEP SEATED CAP SCREWS (40) THAT HOLD THE LOWER BEARING
BRACKET AGAINST THE STATOR CASING. BY MEANS OF TWO SCREW DRIVERS REMOVE THE
LOWER BRACKET FROM THE STATOR CASING. THE COMPLETE ROTOR (14,15,16) WITH
BEARINGS (80), BEARING COVER (20) AND TC SEAT WILL COME OUT WITH THE LOWER
BRACKET. REMOVE BOLTS (82) AND REMOVE BEARING COVER. PULL OUT ROTOR WITH
BEARINGS FROM LOWER BRACKET. (IF THIS IS DIFFICULT, USE A HAND PRESS TO REMOVE
ROTOR FROM BEARING BRACKET. ENSURE NO DAMAGE OCCURS TO THE TC SEAT IN BRACKET).
THE TC SEAT CAN NOW BE PUSHED OUT FROM THE BEARING SIDE BY GENTLY TAPPING THE
SAME. USE FINGERS OR A NYLON TIPPED HAMMER ONLY.
12. CHECK BOTH UPPER AND LOWER BEARINGS 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 BEARING. IF THE BEARING SEEMS WORN OUT OR ANY GREASE LEAKAGE
IS OBSERVED, REPLACE BEARING. USE BEARINGS WHICH ARE FILLED WITH A HIGH
TEMPERATURE GREASE WITH A DROP POINT OF AT LEAST 240 DEGREES CELSIUS.
13. THE UPPER BEARING BRACKET (9) IS HELD IN PLACE BY TWO STUD BOLTS (4) ON THE
STATOR CASING (17/18/19). UNSCREW NUTS (5) AND REMOVE BEARING BRACKET FROM
STATOR CASING. USE SCREWDRIVERS TO PRY OUT THE SAME.
14. THE STATOR IS SHRINK FITTED IN THE CASING AND IS SUPPLIED WITH O-RINGS (10)
AS ONE UNIT.
RE-ASSEMBLY OF THE PUMPSET:
THE RE-ASSEMBLY OF THE UNIT CAN BE DONE BY REVERSING THE DIS-ASSEMBLY
PROCEDURE. 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.