Maintenance; Pressure Relief Procedure - Graco G-Max 7900 Instructions Manual

Maintenance

Maintenance
NOTE: For detailed engine maintenance and specifica-
tions, refer to separate Honda Engines Owner's Manual,
supplied.

Pressure Relief Procedure

Follow the Pressure Relief Procedure whenever
you see this symbol.
This equipment stays pressurized until pressure is
manually relieved. To help prevent serious injury
from pressurized fluid, such as skin injection,
splashing fluid and moving parts, follow the Pressure
Relief Procedure when you stop spraying and before
cleaning, checking, or servicing the equipment.
1. Engage trigger lock.
2. Turn ON/OFF switch to OFF.
3. Move pressure control switch to OFF and turn pres-
sure control knob fully counterclockwise.
4. Unlock trigger safety. Hold metal part of gun firmly
to side of grounded metal pail, and trigger gun to
relieve pressure.
5. Lock gun trigger safety.
6. Open the pressure drain valve. Leave the pressure
drain valve open until you are ready to spray again.
7. If you suspect the spray tip or hose is clogged or
that pressure has not been fully relieved after follow-
ing the steps above, VERY SLOWLY loosen tip
guard retaining nut or hose end coupling to relieve
pressure gradually, then loosen completely. Clear
hose or tip obstruction.
6
Maintenance Checklist
• DAILY: Check engine oil level and fill as necessary.
• DAILY: Check hose for wear and damage.
• DAILY: Check gun safety for proper operation.
• DAILY: Check pressure drain valve for proper oper-
ation.
• DAILY: Check and fill the gas tank.
AFTER THE FIRST 20 HOURS OF OPERATION:
• Drain engine oil and refill with clean oil. Reference
Honda Engines Owner's Manual for correct oil vis-
cosity.
• WEEKLY: Remove air filter cover and clean ele-
ment. Replace element, if necessary. If operating in
an unusually dusty environment: check filter daily
and replace, if necessary.
Replacement elements can be purchased from your
local HONDA dealer.
• WEEKLY: Check level of TSL in displacement
pump packing nut. Fill nut, if necessary. Keep TSL
in nut to help prevent fluid buildup on piston rod and
premature wear of packings.
AFTER EACH 100 HOURS OF OPERATION:
• Change engine oil. Reference Honda Engines
Owner's Manual for correct oil viscosity.
SPARK PLUG:
• Use only BPR6ES (NGK) or W20EPR-U (NIPPON-
DENSO) plug. Gap plug to 0.028 to 0.031 in. (0.7 to
0.8 mm).
• Use spark plug wrench when installing and remov-
ing plug.
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