Page 6-3: Vacuum System
Boxxer H
2
O
Vacuum System
Troubleshooting
1.0.
Weak vacuum at wand. Gauge reads normal (10" to 12" with hoses & wand
attached)
1.1.
Clogged hoses or wand tube
. Disconnect hoses and check carefully for an ob-
struction.
1.2.
Excessive length of hoses connected to machine
. Make sure machine is rated
for the conditions under which it is being operated.
2.0.
Vacuum gauge will not come up to 12" hg
2.1.
There is an air leak somewhere in the vacuum system
. Check vacuum relief
valve for proper adjustment. Carefully check all vacuum hoses for a cut or break.
Check recovery tank lid gasket. Make sure recovery tank drain valve is fully closed.
2.2.
Vacuum blower is turning too slowly
. Check engine RPM. Adjust as necessary to
3000RPM.
2.3.
The vacuum gauge is defective
. Test gauge and replace as necessary.
3.0.
Vacuum gauge reads too high with no hoses attached
3.1.
Filter in recovery tank is clogged
. Remove and clean or replace as necessary.
3.2
.
Hose from vacuum blower to recovery tank is collapsed internally
. Inspect and
replace as necessary.
4.0.
Noisy vacuum blower
4.1
.
Vacuum blower is low on oil
. Inspect oil level and replenish as necessary. Note:
Running vacuum blower low on oil can cause severe mechanical damage. If this situ-
ation occurs, it should be inspected by a qualified service technician.
4.2.
Vacuum blower has internal damage
. Refer to qualified service technician.
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