Troubleshooting
Troubleshooting
Troubleshooting
To prevent skin injection and splashing, never
open a camlock hose or applicator fitting
while there is pressure in the fluid line. See
Pressure Relief Procedure, page 15
1.
Perform Pressure Relief Procedure. See
Pressure Relief Procedure, page 15
2.
Check all possible problems, causes, and
solutions listed below before disassembling
pump.
PROBLEM
PROBLEM
PROBLEM —
—
— CAUSE
CAUSE
CAUSE —
—
— SOLUTION
SOLUTION
SOLUTION
Example:
• Problem.
Problem.
Problem.
–
Cause.
♦ Solution.
• Does
Does
Does not
not
not operate.
operate.
operate.
–
Air motor pilot valve (211) is faulty.
♦ Remove valve by disconnecting swivel unions.
Connect hose directly to air motor. Operate
motor directly with air regulator (210).
–
Valve closed or clogged.
♦ Clear air line; increase air supply. Check that
valves are open.
–
Fluid hose or applicator obstructed.
♦ Clean hose or applicator.*
–
Dried fluid on displacement rod or inlet ball.
♦ Clean rod; always stop pump at bottom of
stroke; keep wet-cup filled with compatible
solvent. Be sure inlet ball moves freely.
–
Air motor parts dirty, worn or damaged.
♦ Clean or repair air motor. See motor manual.
• Output
Output
Output low
low
low on
on
on both
both
both strokes.
strokes.
strokes.
–
Air line restricted or air supply inadequate.
Valves closed or clogged.
♦ Clear air line; increase air supply. Check that
valves are open.
–
Fluid hose/applicator obstructed; hose ID too
small.
♦ Clear hose or applicator*; use hose with larger
ID.
• Output
Output
Output low
low
low on
on
on down-stroke.
down-stroke.
down-stroke.
–
Open or worn intake valve.
♦ Clear or service intake valve.
• Output
Output
Output low
low
low on
on
on up-stroke.
up-stroke.
up-stroke.
–
Open or worn piston valve or packings.
♦ Clear piston valve; replace packings.
• Erratic
Erratic
Erratic accelerated
accelerated
accelerated speed.
speed.
speed.
–
Fluid supply exhausted, clogged suction.
♦ Refill hopper and prime pump.
–
Open or worn piston valve or packings.
♦ Clear piston valve; replace packings.
–
Open or worn intake valve.
♦ Clear or service intake valve.
• Cycles
Cycles
Cycles or
or
or fails
fails
fails to
to
to hold
hold
hold pressure
pressure
pressure at
at
at stall.
stall.
stall.
–
Worn check balls, seats, or piston packing.
♦ Service lower. See
.
• Poor
Poor
Poor finish
finish
finish or
or
or irregular
irregular
irregular spray
spray
spray pattern.
pattern.
pattern.
–
Incorrect fluid pressure at applicator.
♦ See applicator manual; read fluid
manufacturer’s recommendations.
–
Inadequate air assist air pressure.
♦ Adjust air assist needle valve.
–
Dirty, worn, or damaged spray applicator.
♦ Service spray applicator. See spray applicator
manual.
• Cannot
Cannot
Cannot open
open
open or
or
or close
close
close air
air
air motor
motor
motor pilot
pilot
pilot ball
ball
ball valve
valve
valve on
on
on
applicator.
applicator.
applicator.
–
Dirty air clogged the air motor pilot valve.
♦ If no ball valve is immediately available:
Bypass the air motor pilot valve so air is
always supplied to air motor, regardless of
applicator pilot valve position. Then control
fluid flow by adjusting air regulator pressure
up and down as needed. Install new pilot ball
valve when one becomes available.
332612C
35
