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
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.
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.
Upright Portable Hot Oil TCUs | Chapter 5: Maintenance | 32 |