Graco Hydra-Cat Xtreme XL Instructions - Parts Manual page 18

Troubleshooting
PROBLEM
PROBLEM PROBLEM
Mix ratio test is significantly
different from the mix ratio setting.
Spray output is spitting
A squeaking or knocking noise is
heard.
The proportioner speeds up or
runs erratically
18
CAUSE
CAUSE CAUSE
Mix ratio test was not performed
at the normal operating pressure
of the pump
Running out of one material.
The displacement cylinder(s) are
worn or the check valves are not
seating.
Running out of one material.
Siphon hoses are leaking in air.
The bearings are dry or worn.
Running out of one material.
The cylinders are worn or
damaged.
SOLUTION
SOLUTION SOLUTION
Perform ratio test again following
ratio test procedure. See
Check The Ratio, page
Check and refill material
reservoirs. Repeat the test
after the air has been removed
from the system.
See troubleshooting techniques
below to isolate the problem
cylinder(s). See Disconnect the
Displacement Pump, page
Check and refill material
reservoirs. Remember that
once air is in the fluid system it
may take a while for all of it to
escape.
Tighten and seal all siphon fittings
on proportioning pump and feed
pumps.
Lubricate the bearings or
replace them if required. See
Replace the Bearings, page
Check and refill material
reservoirs.
See troubleshooting techniques
below to isolate the problem
cylinder(s). See Disconnect the
Displacement Pump, page
13.
19.
21.
19.
3A3092A