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AEC/Appllcatlon Engineering
Preventive Pump Maintenance
You can extend the life of your pump and reduce the cost per gallon pumped if you perform a
few preventive maintenance procedures.
Lubricating the Pump
Using #2 ball bearing grease and a hand-operated grease gun, gently lubricate all grease fittings
after every 500 hours of operation or after 60 days, whichever comes first. If pump service
occurs in severe conditions, lubricate more frequently. Use an appropriate type of grease for hot
or cold applications.
Adjusting the Pump Packing
You may need to occasionally adjust the pump packing to reduce leakage to a slight weep. If you
cannot reduce leakage by slowly tightening the flanges, replace the packing or use a different
type of packing.
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 or 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!
Storing Your TOH Unit
If you anticipate that your TDH will
be
out of service or stored for a long time, flush and drain
the pump and circulating system to protect it from freeze-ups or rusting. See Section 6-3 on Page
46 for more information.
Page 54
TOH TrueTemp"' Serles Hot 011 Temperature Control Units
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