VACUUM SYSTEM
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TROUBLESHOOTING
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Problem:
Machine will not pick up water, water flows around ends of squeegee.
Possible Cause and Remedy:
1
Cap for recovery tank drain hose not sealing air-tight — install cap properly or replace if damaged.
2
Recovery tank cover not installed properly — push cover down all the way, so it seals air-tight against the
top of the tank.
3
Damaged gasket on recovery tank cover — replace gasket.
4
Low battery voltage — charge or replace batteries.
5
Vacuum motor defective — repair or replace vacuum motor.
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Problem:
Water in vacuum motor
Possible Cause and Remedy:
1
Operator using high-sudsing detergent — use low-sudsing detergent or add a defoaming chemical to the
recovery tank.
2
Vacuum leak in recovery tank drain hose or cap — replace hose or cap.
3
Vacuum shut-off float ball not closing — clean or replace float ball and cage (mounted on recovery tank
cover).
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Problem:
Float closes before tank is full
Possible Cause and Remedy:
1
Foam in recovery tank — advise operator to use low-sudsing detergent or add a defoaming chemical to
the recovery tank.
2
Cage around vacuum shut-off float clogged — disconnect hoses from recovery tank cover, remove the
cover and clean or replace the float cage.
BA 500
Service Manual
14
