MAINTENANCE
285 MM191 (12---89)
3-16
HYDRAULIC SYSTEM TROUBLESHOOTING
Problem
Cause
Remedy
Machine travels slowly or not
Parking brake engaged
Release parking brake
at all
Linkage broken or
Replace and/or adjust
not adjusted properly
linkage
Relief valve stuck open --- (leaking)
Replace relief valve
one forward, one reverse
Motor failure
See
HYDRAULIC COMPONENTS
TROUBLESHOOTING
: Hydraulic
motor failure
Pump failure
See
HYDRAULIC COMPONENTS
TROUBLESHOOTING
: Hydraulic
piston pump failure
Hydraulic fluid level low
Fill hydraulic fluid reservoir
Main brush does not turn
Circuit breaker CB---3 tripped
Reset circuit breaker
Electric on---off switch S---4 failure
Replace switch
Hydraulic valve failure
See
HYDRAULIC COMPONENTS
TROUBLESHOOTING
: Solenoid
valve failure
Hydraulic motor failure
See
HYDRAULIC COMPONENTS
TROUBLESHOOTING
: Hydraulic
motor failure
Gear pump failure
See
HYDRAULIC COMPONENTS
TROUBLESHOOTING
: Hydraulic
gear pump
Electric lift arm switch S---9 failure
Adjust or replace switch
Thermo Sentry
t
tripped
Reset or replace
Thermo Sentry
t
Relief valve stuck open --- (leaking)
Replace relief valve
Side brush turns slowly
Hydraulic valve failure
See
HYDRAULIC COMPONENTS
or not at all
TROUBLESHOOTING
: Hydraulic
control valve failure
Hydraulic motor failure
See
HYDRAULIC COMPONENTS
TROUBLESHOOTING
: Hydraulic
motor failure
Relief valve in
Clean or replace relief
valve sticking
valve
Gear pump failure
See
HYDRAULIC COMPONENTS
TROUBLESHOOTING
: Hydraulic
gear pump
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 ...