Circor HOUTTUIN TT Twin-Screw, Installation, Operation & Maintenance Manual

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Disassembly, Inspection & Reassembly
66 TT
Twin-Screw Pump -
Installation, Operation, and Maintenance Manual
Bearing housings
Perform these checks when you inspect the bearing housings:
•
Check that the bearing housings are clean, with no burrs or other surface damage.
•
Check the bearing housing bores against the values in the bearing fits table.
•
Repair or replace housings as necessary.
Replacement oil seals
Replacement oil seals (704) (721) must be the same as, or equivalent to, those listed in this
table.
Size Inboard oil seal
(704)
DE oil seal
(721)
TT200
Viton Ø50 x Ø68 x 8 - DIN 3760A -
TT220
Viton Ø60 x Ø80 x 8 - DIN 3760A -
TT250
Viton Ø80 x Ø110 x 10 - DIN 3760A -
TT275
Viton Ø90 x Ø120 x 12
– DIN 3760A
-
TT335
Viton Ø100 x Ø125 x 13 - DIN 3760A Viton Ø85 x Ø110 x 13 - DIN3760A
TT450
Viton Ø120 x Ø150 x 12 - DIN 3760A Viton Ø125xØ160x13 - DIN3760A
Reassembly of the two-piece bracket pump (standard)
WARNING:
Lifting and handling heavy equipment poses a crush hazard. Use caution during lifting and
handling and wear appropriate Personal Protective Equipment (PPE, such as steel-toed
shoes, gloves, etc.) at all times. Seek assistance if necessary.
NOTICE:
Make sure that all parts and threads are clean and that you have followed all directions under
the inspections section. Deburr parts if necessary. Apply a Molybdenum based anti-seize
compound with a 0.15 friction coefficient to all the threads.
WARNING:
Check for magnetism on the screw shafts (101) (102) and demagnetize the shaft if there
is Magnetism detected. Magnetism attracts ferritic objects to the mechanical seal, gears
and bearings which can result in excessive heat generation, sparks, and premature failure.
1. The Rotor screws (100) are preassembled to the shafts (101) (102) with the help of
the parallel key (134) and tighten the rotor screws using locknut (112) with specified
tightening torque valve for locking set screws