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Portable Hot Oil Temperature Control Units Page 33
6-4 Corrective Maintenance
Pumps and Seals
Each unit is completely tested and calibrated before leaving the factory. The unit is then
cooled, drained, and packed for shipment.
If the unit stands idle for a long time before being installed in your factory, gaskets can dry
out and possibly leak when you start the unit. In most cases, these gaskets soon swell and
form a tight seal. If not, you may need to tighten the bolts to stop the leak.
Similarly, rough handling in shipping may sometimes cause minor leaks upon startup; you
may need to re-tighten bolts or fittings to stop the leak.
You should expect to periodically replace the pump seal. If the pump is properly lubricated
and used at moderate temperatures, the seal should last several years. The following section
describes the proper procedures for replacing the seal (Mechanical seal, part no. 162-00030-
160). Periodic replacement of the pump drive V-belt is also to be expected.
Note: If the pump motor wiring is disconnected for removal
from the unit, you must check the actual direction of
rotation when the motor is rewired to the unit. Consult
Elementary Diagram provided in unit for more
information.
6-5 Maintaining the Pump
Disassembly
! WARNING
Before opening the pump chamber:
• Make sure that any pressure in the chamber has been
completely vented!
• Make sure that the motor cannot be inadvertently started while
you work on the pump!
Failure to follow these precautions may result in
serious injury or death!