1-42
American-Lincoln
®
SC7740
GENERAL TROUBLESHOOTING
PROBLEM
Sweeping
Does Not
Function
Poor Water
Pick-Up at
Squeegee
Water Spills
from Squeegee
PROBABLE CAUSE
1. Hopper is raised
2. Hopper switch is out of adjustment
1. Side or rear squeegees
are worn or damaged
2. Air leaks at recovery tank
cover and/or manifold gaskets
3. Clogged suction hose
or pick-up tool
4. Loose connections between
suction hose & squeegee of
between hoses of manifold inlet
5. Vacuum motor not operating
6. Vacuum float cage clogged
7. Vacuum float shut off
1. Side squeegee blades-
poor contact with floor
2. Squeegee blades worn or damaged
3. Too much solution being applied
before making turns
REMEDY
1. Lower hopper
2. Adjust hopper switch
1. Examine rubber blades for cuts or
worn spots. Replace if necessary.
2. Check seal on recovery tank
3. Disconnect hoses from squeegee,
flush both thoroughly.
4. Check all hose connections for
looseness or damage
5. Check hydraulic motor
6. Clean perforated metal thoroughly
7. Check for excessive solution/foam
build-up in recovery tank. Change
cleaning chemical mixture (use A-L
approved materials).
1. Readjust blades for proper contact
2. Replace, then adjust blades
3. Shut off sloution flow 5-10 feet
before turn