Maintenance; Tightening Threaded Connections - Graco Husky 715 Instructions And Parts List

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
Pressure Relief Procedure on page 10.
Flush the pump often enough 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 storing it for any length of time.

Tightening Threaded Connections

Before each use, check all hoses for wear or damage
and replace as necessary. Check to be sure all
threaded connections are tight and leak-free.
The recommended frequency for retorquing of fasten-
ers varies with pump usage; a general guideline is to
retorque every two months.

Maintenance

Tightening the Clamps
When tightening the clamps (109), apply thread lubri-
cant to the bolts and be sure to torque the nuts (110)
to 75–85 in-lb (8.5–9.6 N.m). See Fig. 7.
109
110
Fig. 7
Preventive Maintenance Schedule
Establish a preventive maintenance schedule, based
on the pump's service history. This is especially impor-
tant for prevention of spills or leakage due to dia-
phragm failure.
Apply thread lube to bolts and
torque nuts to 75–85 In-lb
(8.5–9.6 N.m).
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