Clarke MA50 15B, Service Manual

Page: 49 / 87

Recovery System
48
Service Manual – MA50 15B
Maintenance and Adjustment
Check ball-float operation
• Open the recovery tank cover
•
Remove the ball-float from the stand-pipe adapter (it just slips onto the adapter fitting)
•
The ball should move freely inside it’s cage all the way to the top, and all the way to the bottom
•
Rinse the Ball Float Assembly thoroughly
•
If the ball or cage is damaged, replace the ball-float assembly
Troubleshooting
Pr Problem Cause Correc tion
•
No Vacuum Motor Operation
(Other functions work)
•
Vacuum circuit breaker tripped
• Reset circuit breaker
•
Defective vacuum motor
• Replace vacuum motor
•
Defective control PCB
•
Replace control PCB
•
Defective vacuum switch
•
Replace switch PCB
•
Defect in wiring
• Trace wiring using circuit
diagram
•
Poor pick-up at squeegee
Restricted air flow
•
Recovery Tank is full
• Empty recovery tank
• Clogged or kinked vacuum
(pick-up) hose
• Check and clean out vacuum
(pick-up) hose
•
Ball Float is stuck
•
Remove and clean ball float.
Air Leaks • Recovery tank lid is not
screwed on tightly.
•
Ensure cover is in place.
Check the “O” ring
• Recovery tank drain cap is not
screwed on fully
•
Screw the drain cap on fully
•
Pick-up tube adapter is not
adjusted properly
•
Adjust pick-up tube adapter
so it’s seated into the indented
area of the squeegee housing
• Leaks in vacuum (pick-up) hose • Replace vacuum (pick-up) hose
• Rubber vacuum seals are
damaged
• Replace rubber vacuum seals
Squeegee Issues
•
Squeegee down pressure out
of adjustment
•
Adjust squeegee down
pressure
•
Squeegee not mounted
properly
•
Confirm the squeegee is
mounted firmly, and the “T” nuts
are seated into the notches of
the squeegee bracket
•
Squeegee blades have debris
between the blade and the floor
•
Clean off the squeegee blades
using a damp cloth
•
Squeegee blades are worn out
or torn
•
Flip the squeegee blades to
put a different edge on the floor
(rear only)
• Change the squeegee blades