HydraMaster CDS 4.8 - Vacuum Blower Troubleshooting

Vacuum Blower System: 8-4
VACUUM BLOWER TROUBLESHOOTING
1.0. Weak vacuum at tool/wand. Gauge reads normal (10” Hg to 14” Hg)
POSSIBLE CAUSE SOLUTION
1.1. Clogged hoses or tool/
wand tube.
Disconnect hoses and carefully check for an obstruction.
1.2. Excessive length
of hoses connected to
machine.
Make sure machine is rated for the conditions under
which it is being operated.
1.3. Clogged heat
exchanger restricts vacuum.
See qualied service technician.
2.0. Vacuum gauge will not come up to 14” Hg
POSSIBLE CAUSE SOLUTION
2.1. There is an air leak
somewhere in the vacuum
system.
Check vacuum relief valve for proper adjustment. Check
all hoses for cuts and breaks. Check recovery tank lid
gasket. Make sure the recovery tank drain valve is fully
closed.
2.2. The vacuum gauge is
defective.
Test and replace as necessary.
2.3.Vacuum blower is
turning too slowly.
Check blower rpm at tachometer on the CDS’ dash.
Blower rpm should be 2 times the tachometer rpm. See the
throttle control kit instructions for further troubleshooting
assistance.
3.0. Vacuum gauge reads high with no hoses attached
POSSIBLE CAUSE SOLUTION
3.1. Filter in recovery tank is
clogged.
Remove and clean or replace as necessary.
3.2. Hose from recovery
tank to blower is collapsed
internally
Inspect and replace as necessary.