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Page 32 Portable Hot Oil Temperature Control Units
Making Six-Month Checks
• Inspect electrical connections for secure, tight electrical
terminations and ground connections. Inspect the power cable,
especially at the entrance point to the electrical enclosure. Have a
qualified electrician perform this inspection.
• Check the mounting bolts on the pump, the motor, and the heater
flange for tightness.
• Remove the heat exchanger tube bundle and check it for lime and
mineral deposits. Carefully clean the bundle as needed.
6-2 Routine Servicing
Your hot oil temperature control unit requires little in preventive maintenance and servicing.
To keep it in good, reliable working order, make sure you follow the following scheduled
preventive maintenance procedures.
Keep surfaces clean and free of any excessive accumulations of dirt, oil, or debris. This is
especially true for the pump. It relies on free air circulation for proper cooling.
Check the motor air intake screen for any accumulation of dirt; clean it as needed.
Servicing the Unit Monthly or Every 500 Hours
• Lubricate the pump at the grease fittings with a high-quality
lithium grease rated at 400ºF (204ºC) or higher. Use only Dow-
Corning #44 or a high temperature grease rated at 400ºF or higher
that is compatible with Dow-Corning #44. Do not over-lubricate.
• Adjust the pump drive belt tension. Make sure that the motor
pulley is properly aligned with the pump pulley; use a straightedge
to check. Tighten motor mounting bolts after realignment.
• Inspect the screen in the Y strainer for accumulations of debris.
Clean as needed.
Servicing the Unit Every Three Months
Remove and clean the screen in the Y-strainer. Replace the screen if it is damaged.
6-3 Draining the Unit for Storage
You should thoroughly flush and drain the unit if you need to take it out of service for a long
time, or if you expect it to become exposed to freezing temperatures. We recommend
TrueFlush™ flushing fluid or equivalent for flushing your unit; follow unit flushing
instructions that comes with TrueFlush™ flushing fluid.
Drain plugs are provided at the base of the heater tank, reservoir tank, and on the pump. You
should also remove, drain, and reinstall the heat exchanger tube bundle before storage.