Prochem Blazer GT - Manual (Page 49)

47
Maintenance
PROBLEM CAUSE SOLUTION
Loss of vacuum
While cleaning, the vacuum is
not up to specification. Engine
RPM is normal.
Vacuum gauge is giving an improper
reading.
Examine the tubing between the vacuum
relief valve and the vacuum gauge and
remove any blockage.
Vacuum hose(s) is damaged,
causing a suction leak.
Inspect hose(s), repair or replace.
Waste tank gaskets not sealing
properly, not positioned properly
Inspect the gaskets. Repair or replace
gaskets as necessary. Re-position lid, inlet
and outlet.
Plugged vacuum hose or vacuum
plumbing between vacuum inlet and
strainer basket.
Unplug vacuum hose or inlet plumbing.
Waste tank filter or strainer basket is
plugged. Clean or replace filter. Clean strainer
basket.
Loose vacuum pump drive belts. Tighten the drive belts
Waste tank drain valve is damaged
or left open, causing a vacuum leak.
Close drain valve, if open. Remove the
drain valve and, after inspecting, replace
the defective components.
Vacuum relief valve requires adjust-
ment or has a vacuum leak due to
damaged diaphragm.
Re-adjust the vacuum relief valve. If the
vacuum does not increase, remove and
inspect the relief valve diaphragm. If
damaged, replace
Vacuum exhaust heat exchangers
are plugged with lint.
Remove and clean.
Vacuum pump is worn out. Replace the vacuum pump.
Excessive Vacuum
Improper throttle adjustment.
Adjust throttle to set desired vacuum
pressure.
Vacuum obstruction Inspect hoses for obstructions.
Vacuum relief valve requires adjust-
ment.
Readjust the vacuum relief valve.
Loss of chemical
With the cleaning tool valve
open, no chemical
Chemical pump is improperly primed.
Refer to chemical pump priming instruc-
tions.
The strainer at the inlet end of the
chemical inlet tube is clogged
Unclog the strainer. If damaged, replace.
Suction leak in the inlet tube leading
into the chemical pump. Inspect inlet tubes and flow meter for air
leaks or damage and replace, if required.
Chemical pump check valve(s) is
clogged
Remove any debris from the chemical
check valve(s). Replace chemical check
valve(s) or seals, if necessary.
Chemical prime/on-off valve or
chemical metering valve is defective.
Replace valve(s).
Chemical pump diaphragm is
ruptured.
Disassemble the chemical pump and
replace the damaged diaphragm and
plastic disk.
Defective cylinder in the solution
pump.
Measure the pump volume. If the pump
volume is less than normal, refer to “Loss of
Pump Volume” in the Troubleshooting
section in this manual.
86317260 BLAZER GT