Maintenance - Graco Husky 515 D51 Series Instructions Manual

Lubrication
The air valve is lubricated at the factory to operate with-
out additional lubrication. If you want to provide addi-
tional 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 11.
12 308981

Maintenance

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.
Check fasteners. Tighten or retorque as necessary.
Although pump use varies, a general guideline is to
retorque fasteners every two months. See Torque
Sequence, page 29.
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 fail-
ure.