Maintenance
Maintenance
Maintenance and repair of the pump involves
potentially hazardous procedures. Only trained
and qualified personnel who have read and who
understand the instructions in this manual should
maintain or repair this equipment.
Preventive Maintenance Schedule
Check the following items at the intervals listed below,
following all of the safety warnings in this manual.
Every Three Months
Check gauges on pump inlet and outlet and pump
operating speed to confirm operating point.
Every Six Months
• Check bearing temperature and compare with
earlier readings.
• Run an amperage reading to verify that the motor
is running normally.
• Inspect the fan guard and remove any accumulated
debris from under it and around the motor.
• Tighten any fasteners that may be loose.
• Lubricate the motor. See the motor manufacturer’s
instructions.
• Lubricate the pump. See
Pump Bearing Lubrication, page 20, and
Hose Lubrication, page 20.
Flushing
• Flush before changing fluids, before fluid can dry
in the equipment, at the end of the day, before
storing, and before repairing equipment.
• Flush at the lowest pressure possible. Check
connectors for leaks and tighten as necessary.
• Flush with a fluid that is compatible with the fluid
being dispensed and the equipment wetted parts.
Pump Bearing Lubrication
Grease-lubricated pump bearings require an NLGI
Number 2 grease such as Shell Dolium R or
equivalent. Grease the bearings every 24 months,
depending on duty cycle and ambient conditions.
1. Remove the plug (18) from the pump housing
and replace it with a zerk fitting.
2. Use a low pressure grease gun to pump grease
into the zerk fitting. Add grease until it passes
through the outer bearing of the shaft.
3. Remove the zerk fitting and reinstall the plug (18).
Inspect the pump and re-grease the bearings if you
suspect that the original grease was contaminated
by a grease seal failure.
Hose Lubrication
The pump requires lubrication of the hose. The
lubrication provides longer hose life by increasing
cooling and reducing friction between the roller and
the hose. The use of non-standard lubricant can
impact your hose life; always use genuine Graco
hose lube.
Fill your pump to the level indicated in
Lubricate the Pump, page 10.
20 3A1938E