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WARNING
Failure to follow these instructions could result in serious bodily injury or death. Do not attempt to work on any Tuthill pump installation
before completing the steps below. Disconnect the drive so that it cannot be started while work is being performed. Review the Material
Safety Data Sheet (MSDS) applicable to the liquid being pumped to determine its characteristics and the precautions necessary to
ensure safe handling. Vent all pressure within the pump through the suction or discharge lines. All Tuthill pumps contain residual
hydraulic oil from the factory production test. Determine if this is compatible with the fluid you are pumping. If the fluid is incompatible,
then the pump must be fully flushed prior to use. If the pump is to be operated at elevated temperatures, the pump should be brought
up to operating temperatures gradually. Rapid or sudden introduction of liquids at elevated temperatures into the cold liquid chamber
of the pump could cause damage to pump externals, seals or other internal parts. Pumps can run dry provided provisions are made for
the mechanical seal if one is used. Failure to comply with this could cause severe damage to the mechanical seal parts. Pump needs to
be earthed separately to avoid a buildup of electro-static charge.
Disassembly & Reassembly for Model 600 Pumps
Minor Disassembly For Fluid Chamber Inspection
1.
Remove all burrs on drive shaft with a mill file or emery paper. Also check for deposit of paint. Special care should be taken around
the keyway and beveled corner on the drive shaft. These two areas are normally where burrs appear. Burrs or paint will cause an
obstruction in the bushing area.
2.
Drain oil from gear case by removing lower drainpipe plug. Remove cap screws (23) on face of gear case cover.
3.
Remove gear case cover (22) by sliding over shafts.
4.
If the timing gears (14) are a slip fit on the shafts. Mark gears so that in reassembly the gears may be remounted on the shafts from
which they were removed. Remove the gears by loosening the setscrews. There are two in each gear. Then slide gears off drive end
of shaft. If gear keys are sheared a gear puller may be required. Remove two woodruff gear keys (8).
5.
If interference fitted (IF) timing gears (14) are furnished. Mark gears so that in reassembly the gears may be remounted on the shafts
from which they were removed. IF gears do not have setscrews. First attempt to remove them can be can be made with a standard
gear puller. Check that the gears have the correct timing marks before removal. If necessary, mark them again. If the gear puller was
not successful in removing the gears, heat the gear OD with a torch and use a hydraulic jack to remove the gears.
WARNING
Wear heat-resistant gloves when handling hot components.
6.
If Packing is used (reference assembly on page 26). Remove packing gland nuts (30) and slide packing gland (42) out of the way.
Then remove packing (36) from both seal chambers in the impeller housing. If pump is equipped with mechanical seals, see below
for general instructions and refer to the seal instructions that were shipped with the pump. Also, reference Page 39 for additional
packing information. If Tuffseals are used (reference assembly on page 28). Loosen Tuffseal set screws that lock the cartridge seal’s
collar onto the shaft, on the impeller housing side. Also, reference Page 40 for additional Tuffseal information. If mechanical seals
are used (reference assembly on page 30). Remove pipe plugs (34) from impeller housing stuffing boxes. This allows access to
the mechanical seal set screws holding the seal to the shaft. Mark the shaft where the mechanical seal is so that the correct seal
working length can be referenced upon re-assembly. Then loosen the mechanical seal set screws. Loosen the mechanical seal
gland nuts (30) and allow the mechanical seal gland to be loose on the housing. Thus, when the shafts are pulled out of this area
when removing the faceplate assembly the gland will not fall off. Allow it to hang loosely on the studs. Also, reference Page 41 for
additional mechanical seal information.
7.
Remove hex head bolts (25) on outboard side of faceplate. Make note on which side the drive shaft is located for reassembly.
Remove entire faceplate by sliding away from impeller housing.