SERVICE 5
AQUATECH OPERATIONS, SERVICE AND PARTS MANUAL
A Product of Hi-Vac Corporation
SERVICE
CONDITION: LOSS OF VACUUM
PROBABLE CAUSES
REMEDIES
Debris tank is full and check ball is
closed.
Drain or recycle water in debris tank. Dump debris tank.
Boom turret plugged.
Remove turret and clear blockage.
Vacuum system leak.
Inspect vacuum system for leaks, normally a high pitched
sound is heard. Some areas to check first are: Rear door seal,
tank closure seal, intake tube O-rings, portal gasket. Check to
see that gate valves are closed, such as rear drain, and valves
on the recycling system.
Blockage in the intake hose.
Disengage exhauster pump and evacuate the vacuum from the
tank. Inspect intake tubes. Remove the primary check valve
cover and inspect the ball check. Lower the boom all the way
to allow material to drop out through the hose. Pressure dis-
charge through boom hose.
Inadequate engine speed.
Check engine tachometer, adjust throttle cable, consult engine
manual. Check for correct gear.
Loose exhauster pump drive belt.
Tighten.
Faulty vacuum reading.
Replace gauge.
Exhauster pump malfunction.
Consult exhauster pump manual.
Sticking vacuum relief valves.
Check to determine if they open at 15” Hg.,
Clean/lubricate/replace if necessary.
TROUBLESHOOTING COMMON PROBLEMS
The following is a list of possible problems which may be encountered during the life of this machine. Probable
causes are listed in this section together with recommended solutions to these problems. If the resolution of these
problems or any other problems are not readily apparent, contact your local authorized X-Vac dealer.
