Sterlco Upright High Temperature Heat Transfer - Manual (Page 32)

Upright Portable Hot Oil TCUs Chapter 5: Maintenance 32
Adjusting End Clearance
After long periods of service, the running clearance between the end of the rotor teeth and
head may be increased from wear. The pump may lose some capacity of pressure as a result.
If you reset the end clearance, pump performance should improve.
Examining Internal Parts
Remove the head occasionally and examine the idler, bushing, head and pin for wear.
Replace the idler bushing and idler pin after moderate wear to avoid replacing more
expensive parts later.
Note: Make sure the idler doesn’t slide off the idler pin during head removal to avoid
damage and personal injury.
Cleaning the Pump
A clean pump is easier to inspect, lubricate, and adjust; it runs better and looks better!
5-3 Corrective Maintenance
Pumps and Seals
Each Upright 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 Diagrams provided in unit for additional
information.