Graco Fire-Ball H Series Instructions-Parts List Manual page 10

WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 9.
Relieve pressure before you check or service any sys-
tem equipment.
Problem
Pump fails to operate
Continuous air exhaust
Erratic pump operation
Pump operates, but output low on
up stroke
Pump operates, but output low on
down stroke
Pump operates, but output low on
both strokes
*Follow the Pressure Relief Procedure Warning on page 9 and disconnect the fluid line. If the pump starts when
the air is turned on again, the line, etc., is clogged.
Toubleshooting
gers from pinching or amputation by moving parts
in the air motor.
NOTE: Check all other possible problems and solu-
tions before disassembling the pump.
Cause
Inadequate air supply pressure or
restricted air lines
Closed or clogged valves
Clogged fluid lines, hoses, valves,
etc.
Damaged air motor
Exhausted fluid supply
Worn or damaged air motor
gasket, packing, seal, etc.
Exhausted fluid supply
Held open or worn intake valve or
piston packings
Held open or worn piston packings
Held open or worn intake valve
Inadequate air supply pressure or
restricted air lines
Closed or clogged valves
Exhausted fluid supply
Clogged fluid lines, hoses, valves,
etc.
Packing nut too tight
Loose packing nut or worn packings
WARNING
MOVING PARTS HAZARD
Never operate the pump with the warn-
ing plate or the identification plate re-
moved. These plates protect your fin-
Solution
Increase air supply; clear
Open; clean
Clear*
Service air motor
Refill and reprime or flush
Service air motor
Refill and reprime or flush
Clear; service
Clear; service
Clear; service
Increase air supply; clear
Open; clean
Refill and reprime or flush
Clear*
Loosen
Tighten; replace