Graco HYDRA-CAT FIXED RATIO, Instructions-Parts List Manual

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Troubleshooting
WARNING
INJECTION HAZARD
To reduce the risk of an injury from
injection, splashing fluid, or moving
parts, follow the
Pressure Relief Proce-
dure on page 23 if the spray tip/nozzle clogs and
whenever you:
D
are instructed to relieve the pressure,
D
stop spraying,
D
check or service any of the system equipment,
D
or install or clean the spray tip.
WARNING
MOVING PARTS HAZARD
To reduce the risk of serious injury,
including amputation, from moving parts
inside the air motor housing, never
operate the pump with the air motor plate removed.
The chart below is specific to the air motor and pump.
Refer to the other instruction manuals included with the
system to troubleshoot individual components.
FALLING RISING
RESIN
PUMP
HARDENER
PUMP
TROUBLE AREA:
RESIN PUMP LEAKAGE
1. THROAT PACKING
2. PISTON PACKING
3. PISTON BALL CHECK
FALLING
RESIN
PUMP
HARDENER
PUMP
TROUBLE AREA:
HARDENER PUMP LEAKAGE
1. THROAT PACKING
2. PISTON PACKING
3. PISTON BALL CHECK
RISING
FALLING RISING
RESIN
PUMP
HARDENER
PUMP
TROUBLE AREA:
RESIN PUMP LEAKAGE
1. THROAT PACKING
2. FOOT VALVE BALL CHECK
FALLING RISING
RESIN
PUMP
HARDENER
PUMP
TROUBLE AREA:
HARDENER PUMP LEAKAGE
1. THROAT PACKING
2. FOOT VALVE BALL CHECK
This chart uses the proportioner
gauges to determine pump mal-
functions.
Faulty manifold check valves can
mask pump cylinder problems.
Always keep these valves operat-
ing properly.
Observe the gauge readings dur-
ing the stroke direction indicated
by the bold arrow, and
immediately after closing the
manifold.
Flush and clean the filter screens.
Trigger the applicator and stop
the proportioner in the up posi-
tion.
If gauges hold equal pressure,
this side of the system is oper-
ating properly.
If pressure falls faster on one
gauge, service on that side is
required. Repair/Replace ball
check or piston packing or
throat packing of the pump.
Trigger the applicator and stop
the proportioner in the down posi-
tion.
If pressure falls faster on one
gauge, service on that side is
required. Repair/Replace throat
packing or inlet foot valve of the
pump.