Graco Gusmer H-20 Pro Operation page 9

1 Hydraulic Pressure Control
Pressure control knob is factory-set (full clockwise)
to maximum rated hydraulic pressure. To decrease
hydraulic pressure, turn knob counterclockwise
(knob will stop after approximately 2 turns). To
return to maximum pressure, turn knob clockwise
until it stops. (See F
IG
F . 3: Hydraulic Pressure Adjustment
IG
2 B- (Resin) Proportioning Pump
Draws in and dispenses a fixed volume of resin
material for delivery to mixing chamber of spray gun
or pour head.
3 B- (Resin) Pressure Gauge
Indicates pressure in resin proportioning system.
4 B- (Resin) Over-Pressure Safety Switch
Factory set to turn off hydraulic drive system when
resin proportioning pump exceeds safety switch
operating pressure limit. Restarts when pressure
drops below limit.
5 A- (Isocyanate) Proportioning Pump
Draws in and dispenses a fixed volume of
isocyanate material for delivery to mixing chamber
of spray gun or pour head.
6 A- (Isocyanate) Pressure Gauge
Indicates pressure in isocyanate proportioning
system.
7 A- (Isocyanate Over-Pressure Safety Switch
Factory set to turn off hydraulic drive system when
isocyanate proportioning pump exceeds safety
switch operating pressure limit. Restarts when
pressure drops below limit.
8 B- (Resin) Inlet Supply Ball Valve
Allows delivery of resin to proportioning unit.
311392C
. 3.)
Control
Knob
9 A- (Isocyanate) Inlet Supply Ball Valve
Allows delivery of isocyanate to proportioning unit.
10 Hydraulic Pressure Gauge
Indicates pressure in hydraulic drive system.
11 Hydraulic Tank Level Gauge
Shows level and temperature of hydraulic fluid in
tank.
12 Lube Pump System (Iso side only)
Continuously circulates pump lube to prevent
crystallization of isocyanate on pump shaft.
13 Hydraulic Directional Valve
Controls direction of hydraulic flow.
14 Hose Heat Connector
Connects power to heated hoses.
15 FTS Harness
Carries electrical signal from FTS sensor in
isocyanate hose to digital hose temperature
controller.
16 A- (Isocyanate) Primary Heater
Heats isocyanate to required dispensing
temperature.
17 B- (Resin) Primary Heater
(Located behind cover) Heats resin to required
dispensing temperature.
18 Inlet Pressure Gauge
(Both sides) Indicates chemical supply pressure at
proportioner inlet.
19 Inlet Temperature Gauge
(Both sides) Indicates chemical supply temperature
at proportioner inlet.
Component Identification
9