AIRLESSCO G-Force II 2525 DD - Manual (Page 11)

Pressure Relief Procedure
333031E 11
Unloader
Adjustment Knob
The unloader valve on your machine is equipped with an
adjustment knob to adjust the pressure. If less pressure
is needed, turn the adjustment knob counter-clockwise.
To set back to maximum, turn adjustment knob fully
clockwise. Do not over tighten.
Thermal Relief Valve
To ensure the water temperature does not exceed
acceptable levels, never allow the unit to operate in the
bypass mode (unit running with gun trigger closed) for
more than three minutes.
A thermal relief valve has been added to this unit to pro-
tect the pump. It may begin to open and release water if
the water temperature in the pump has exceeded 140°F
(60°C). This will allow fresh, cool water to enter the sys-
tem.
Pre-Start Inspection Procedures
Before starting the unit, perform the following proce-
dures:
1. Check oil level in pump and engine.
2. Inspect water inlet strainer. Clean or replace if nec-
essary (see Water Supply, page 10).
3. Check all hose connections to make sure they are
tightened securely (see Water Supply, page 10).
NOTICE
Do not overtighten the unloader. Breakage could
result in immediate loss of water pressure and costly
repairs.
FIRE AND EXPLOSION HAZARD
Inspect for system fuel leaks. If a fuel leak is found,
do not start unit. See Fire and Explosion Hazard on
page 4. Make sure all damaged parts are replaced
and mechanical problems are corrected prior to
operation of unit. If service is required, contact Graco
Customer Service.
INJECTION HAZARD
Inspect high pressure hoses for kinking, cuts and
leaks. If a cut or leak is found, do not use hose.
Replace hose before starting unit (see Skin
Injection Hazard, page 5). Be sure that all damaged
parts are replaced and that the mechanical problems
are corrected prior to operation of the unit. If you
require service, contact Graco Customer Service.