OPERATION
2-36
285 MM191 (12---89)
MACHINE TROUBLESHOOTING -- SCRUBBING
Problem
Cause
Remedy
Trailing water --- poor
Worn rear squeegee
Rotate or replace rear squeegee
or no water pickup
blade
Rear squeegee out of adjustment
Adjust rear squeegee
Vacuum hose clogged
Flush vacuum hoses
Recovery tank full
Drain tank
Ball float stuck shutting off
Clean ball float and float guide
vacuum
Engine not operating at governed
Speed up engine to “litter” speed
speed (For machines below
and readjust governor
serial number 010750)
Debris caught on squeegee
Remove debris
Debris hopper full
Empty hopper
Foam filling recovery tank
Empty recovery tank; change
detergent
Vacuum hose to rear squeegee
Reconnect or replace vacuum
disconnected or damaged
hose
Vacuum fan to recovery tank hose
Replace hose
damaged
Little or no solution flow
Solution tank empty
Fill solution tank
to floor
Water valve cable broken or
Replace and/or adjust cable
out of adjustment
Solution supply lines and
Flush solution supply lines,
spreader tube clogged
spreader tube
Water valve switch in “off” position
Move switch to “on” position
Water valve solenoid failure
Clean or replace solenoid valve
Solution flow knob in “off” position
Pull flow knob into “on” position
Poor scrubbing performance
Debris caught on scrub brushes
Remove debris
Improper detergent or brushes used
Check with TENNANT
r
representative for advice
Worn scrub brushes
Replace scrub brushes
Scrub brushes out of adjustment
Adjust scrub brushes
Scrub brush drive failure
See
HYDRAULIC SYSTEM
TROUBLESHOOTING: Main brush
turns slowly or not at all
Debris hopper full
Empty hopper
NOTE: For more specific electro-hydraulic system troubleshooting information, see HYDRAULIC SYSTEM
TROUBLESHOOTING in the MAINTENANCE section.
Summary of Contents for 285
Page 1: ...r 285 Sweeper Scrubber ...
Page 6: ...ABOUT THIS MANUAL 285 MM191 12 89 d ...
Page 18: ...SPECIFICATIONS 285 MM191 12 89 1 2 ...
Page 22: ...SPECIFICATIONS 285 MM191 12 89 1 6 ...
Page 24: ...OPERATION 2 2 285 MM191 12 89 ...
Page 62: ...OPERATION 2 40 285 MM191 NIL ...
Page 76: ...MAINTENANCE 285 MM191 12 89 3 14 04644 HYDRAULIC SCHEMATIC LOW DUMP MODEL ...
Page 77: ...MAINTENANCE 3 15 285 MM191 12 89 04645 HYDRAULIC SCHEMATIC MULTI LEVEL DUMP MODEL ...
Page 103: ...MAINTENANCE 3 41 285 MM191 6 90 06187 ELECTRICAL SCHEMATIC AUTO SHAKER RFS ...
Page 104: ...MAINTENANCE 285 MM191 6 90 3 42 06187 ELECTRICAL SCHEMATIC AUTO SHAKER RFS ...
Page 134: ...APPENDIX 285 MM191 12 89 4 2 ...