Graymills DDP .375' Pump - Manual (Page 4)

14
Maintenance
Lubrication
The air valve is designed to operate unlubricated, however
if lubrication is desired, every 500 hours of operation (or
monthly) remove the hose from the pump air inlet and add
two drops of machine oil to the air inlet.
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
WARNING
To reduce the risk of serious injury whenever you are
instructed to relieve pressure, always follow the Pres-
sure Relief Procedure on page 11.
Flush the pump when necessary to prevent the fluid you are
pumping from drying or freezing in the pump and damag-
ing it. Use a compatible solvent.
Before storing the pump, always flush the pump and
relieve the pressure.
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.
The recommended frequency for retorquing of fasteners
varies with pump usage; a general guideline is to retorque
every two months.
Tightening the Clamps
When tightening the clamps (111), apply thread lubricant to
the bolts and be sure to torque the nuts (113) to 50 to 60
in-lb (5.6 to 6.8 N-m). See Fig. 9.
01446B
Fig. 9
1
111
Apply thread lube and torque nuts to 50 to 60
In-lb (5.6 to 6.8 N.m)
1 113
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.