Graymills DDP .5' Pump - Manual (Page 11)

11
Maintenance
Lubrication
The air valve is lubricated at the factory to operate without
additional lubrication. If you want to provide additional
lubrication, remove the hose from the pump air inlet and
add two drops of machine oil to the air inlet every 500
hours of operation or every month.
CAUTION
Do not over-lubricate the pump. Oil is exhausted through
the muffler, which could contaminate your fluid supply or
other equipment. Excessive lubrication can also cause the
pump to malfunction
Flushing and Storage
Flush the pump to prevent the fluid you are pumping from
drying or freezing in the pump and damaging it. Use a
compatible solvent.
Always flush the pump and relieve the pressure before
you store it for any length of time.
Read Pressure Relief Procedure on
page 10.
Tightening Threaded Connections
Before each use, check all hoses for wear or damage and
replace as necessary. Check to be sure all threaded connec-
tions are tight and leak-free.
Check and retorque all threaded connections, including
manifold screws, clamps, and air valve screws, at least
every two months. Although the recommended frequency
for retorquing of fasteners varies with pump usage, a
general guideline is to retorque every two months.
Preventive Maintenance Schedule
Establish a preventive maintenance schedule, based on the
pump’s service history. This is especially important for
prevention of spills or leakage due to diaphragm failure.