8. REMOVE THE FOUR NOS. DEEP SEATED CAP SCREWS (42) THAT HOLD THE LOWER BEARING
BRACKET AGAINST THE INNER CASING. BY MEANS OF TWO NOS. SCREW DRIVERS REMOVE THE
LOWER BEARING BRACKET FROM THE STATOR CASING (25). THE COMPLETE ROTOR (36) WITH
BEARING (39), BEARING COVER (38) AND TUNGSTEN CARBIDE/SILICON CARBIDE SEAT WILL
COME OUT WITH THE LOWER BEARING BRACKET. REMOVE BOLTS (37) 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/SILICON CARBIDE SEAT IN BEARING BRACKET). THE
TC/SC 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).
9. CHECK BOTH UPPER AND LOWER BEARINGS (35 & 39) 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 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 A SPECIAL BEARING WHICH IS PRE-FILLED WITH A
SPECIAL HIGH TEMPERATURE GREASE WHICH ARE AVAILABLE FROM US READILY).
10. REMOVE THE CABLE GLAND ASSEMBLY (2) BY TAKING OFF THE HEX NUTS (6). USING
TWO SCREWDRIVERS GENTLY PLY OUT THE CABLE GLAND BASE (12). EXAMINE THE CABLE
LEAD GROMMET (11) AND THE CABLE GROMMET (9). REMOVE THE WIRE NUTS (15,16) AND
UNSCREW THE EARTHING SCREW (17).
11. THE TOP BRACKET (22) IS HELD IN POSITION BY FOUR BOLTS (31) ON THE STATOR
CASING. UNSCREW THE BOLTS AND REMOVE THE STATOR CASING WITH THE HELP OF PULLER
FOR STATOR (T8003). ALTERNATIVELY TWO SCREW DRIVERS MAY BE USED TO PRY THE TOP
BRACKET FROM THE STATOR.
12 THE STATOR IS SHRINK-FITTED IN THE INNER CASING. THE STATOR CAN NOW BE
CHECKED FOR ANY ELECTRICAL FAULTS. MEASURE LINE TO LINE RESISTANCE AND PERFORM
A MEG OHM TEST. IF THE STATOR IS WET BAKE FOR THREE HOURS AT 250F AND PERFORM A
HIGH POT TEST.
RE-ASSEMBLY OF THE PUMPSET.
THE PUMP CAN BE RE-ASSEMBLED AS PER PROCEDURE GIVEN BELOW. PLEASE HOWEVER NOTE
THE FOLLOWING:
A) ALWAYS REPLACE NEW O-RINGS AND DISCARD OLD ONES.
B) REPLACE NEW LOCK WASHER WHEN RE-ASSEMBLING.
1. THE CHECKED/REPAIRED STATOR IS KEPT UPRIGHT AND THE TOP BRACKET IS FIT USING
THE FOUR BOLTS (31).
2. SLIDE BEARING COVER (38) ON ROTOR SHAFT.
3. FIT BEARINGS (IF REMOVED OR REPLACED) ON ROTOR SHAFT (USE EITHER A HAND
PRESS OR SHRINK THE SAME -- DO NOT HAMMER THE BEARINGS ON THE SHAFT-- YOU MAY
BEND THE SHAFT AND ALSO DAMAGE THE BEARINGS) AND FIT CIRCLIPS ON TOP AND BOTTOM
GROOVES ON SHAFT.(IF THE BEARINGS ARE SHRINK FITTED ON THE SHAFT, HEAT THE
BEARINGS IN OIL TO A MAXIMUM TEMPERATURE OF 120 DEGREES CELSIUS AS A HIGHER
TEMPERATURE WILL LIQUEFY THE GREASE IN THE BEARING AND RENDER THE SAME
UNUSABLE).
4. SLIDE LOWER BEARING BRACKET (41) ON TO LOWER BEARING AND ALIGN FOUR NOS.
HOLES ON BEARING COVER WITH THE TAPPED HOLES ON LOWER BEARING BRACKET. FIT THE
BOLTS (37) AND TIGHTEN BEARING COVER.
(18 pages)
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