Problem
Problem
Problem
Cause
Cause
Cause
Solution
Solution
Solution
The abrasive ball valve was
left open during shut down.
See
, step 2.
The abrasive ball valve is
worn.
With the pot pressurized and the abrasive ball valve closed,
engage the blast control switch (B) and check to make sure
the pump is stalled. If the pump rod is creeping, replace the
abrasive ball valve (M).
The blast hose recoils
heavily when the blast
control switch (B) is
engaged. Large slugs
of abrasive and water
are ejected from nozzle.
The pinch hose is worn.
With the pot pressurized and the abrasive ball valve
open, check to make sure the pump is stalled. If the
pump rod is creeping, replace the pinch hose. See
Replacing the Pinch Hose, page 32
.
The water pressure regulator
is malfunctioning.
Adjust the water pressure regulator to 185 psi (12.75 bar,
1.275 MPa). If this adjustment is not possible, service the
water pressure regulator (see manual 309474).
The pot pressure relief
valve is discharging
water.
The pressure relief valve has
failed.
Replace the pressure relief valve if weeping occurs at or
below 185 psi (12.75 bar, 1.275 MPa).
3A3489A
25
