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Troubleshooting
Troubleshooting
Problem
Pressure is higher on one side
when setting pressure with function
knob.
Pressures are not balanced when
running but pressure is generated
and holds on both strokes.
A (ISO) side rich; lack of B (RES)
side.
B (RES) side rich; lack of A (ISO)
side.
Flow will not shut off when ball valve
lever is closed.
12
Cause
Pump intake valve partially plugged.
Air in hose. Fluid is compressible.
Unequal size hoses.
Feathering the valve lever to
decrease the flow rate through the
gun.
Unequal viscosities.
Restriction on one side.
A (ISO) side gauge is low.
B (RES) side gauge is low.
A (ISO) side gauge is low.
B (RES) side gauge is low.
Worn ball valve seat of ball.
Solution
Clean pump intake valve.
Purge air from hose.
Use matching hoses.
When opening or closing the valve,
always move the lever all the way.
Do not try to control the flow rate by
partially opening the lever.
Check that A (ISO) and B (RES)
chemicals are within the chemical
manufacturer's specified applica-
tion temperature range.
Change restrictor at mix point to
balance back pressure.
Clean mix module, restrictors, or
check valves at mix manifold.
B (RES) side restriction down-
stream of gauge. Check gun check
valve spring, mix module, or mix
manifold restrictor screen.
B (RES) side material supply prob-
lem. Check B (RES) side inlet
strainer and pump intake valve.
A (ISO) side material supply prob-
lem. Check A (ISO) side inlet
strainer and pump intake valve.
A (ISO) side restriction downstream
of gauge. Check gun check valve
spring, mix module, or mix manifold
restrictor screen.
Replace ball valve. See assembly
specifications in illustration on
page 13.
332198C
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