Troubleshooting - Graco Bulldog Hydra-Cat Series Instructions And Parts List

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 19 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.
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.
24 308225

Troubleshooting

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.
TROUBLE AREA:
RESIN PUMP LEAKAGE
1. THROAT PACKING
2. PISTON PACKING
3. PISTON BALL CHECK
RESIN
PUMP
FALLING
TROUBLE AREA:
RESIN PUMP LEAKAGE
1. THROAT PACKING
2. FOOT VALVE BALL CHECK
RESIN
PUMP
FALLING
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.
TROUBLE AREA:
HARDENER PUMP LEAKAGE
1. THROAT PACKING
2. PISTON PACKING
3. PISTON BALL CHECK
HARDENER RESIN
PUMP PUMP
RISING RISING
TROUBLE AREA:
HARDENER PUMP LEAKAGE
1. THROAT PACKING
2. FOOT VALVE BALL CHECK
HARDENER
RESIN
PUMP
PUMP
RISING
RISING
HARDENER
PUMP
FALLING
HARDENER
PUMP
FALLING