Prochem Apex GTX - Manual (Page 55)

53
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 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 adjustment
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 adjustment. 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 instructions.
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 tube and flow meter for 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.
Chemical flow meter
indicates flow with the
tool valve closed
External leak in chemical piping
Tighten fittings. Re-apply thread sealant where
required. If any fittings are damaged, replace.
Outlet check valve is full of debris or
damaged, not allowing it to close
properly Close the chemical valve on the chemical panel.
If the flow meter does not indicate flow, remove
debris or replace check valve, if necessary.
Chemical pump diaphragm is ruptured
Close the chemical valve on the chemical panel.
If the flow meter still indicates flow, replace the
chemical pump diaphragm and plastic disk.
Internal leak in chemical valve causing
continual flow through prime tube
returning to waste tank. Tighten valve packing nut (see "General Service
Adjustments" section in this manual). Replace
valve, if necessary.
86341750 APEX GTX