Troubleshooting
313536U 19
Troubleshooting
Problem Cause Solution
Poor mixing One or both sides of gun are clogged Clean the gun, see Maintenance on
page 16
One or both orifices may need to be
replaced
Hydraulic piston not opening fast
enough due to insufficient hydraulic
pressure
Verify hydraulic unit pressure and
accumulator charge
No fluid being dispensed Insufficient pressure to move hydrau-
lic piston to the dispense position
Verify hydraulic unit pressure and
accumulator charge
Faulty proximity switch Replace proximity switch
Damaged piston u-cup seals Send gun to Graco for repair
Chemical crossover Seal failure on piston rod Send gun to Graco for repair
Hydraulic leak into divorce chamber
(hydraulic fluid found in purged
grease when greasing the gun)
Damaged seal u-cup Send gun to Graco for repair
Proximity switch not working Damaged proximity switch Remove and test the switch, replace
as needed
Damaged proximity switch cord Remove and test the cord, replace as
needed
Valve opens on power up Air in hydraulic lines Disconnect hydraulic hoses from
gun. Follow Gun Setup on page 11.
To Next Page
Loading...
