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GB - 11
Gravely Dealers will provide any service or adjustments
which may be required to keep your unit operating at
peak efficiency. Should engine service be required,
contact an Gravely dealer or an authorized engine
manufacturer's service center.
1
Change more often in dirty, dusty conditions.
CHECKING SAFETY INTERLOCK SYSTEM
Test the safety interlock system before each use. If the
system does not function properly, do not operate the unit
until repairs are made.
The PTO must not engage unless operator is sitting on
seat. To test:
1. Start engine.
2. Stand up off of seat.
3. Lift PTO switch. PTO must not engage.
Engine must not start unless PTO is disengaged and the
speed control pedal is in neutral. To test:
1. With engine off, engage PTO.
2. Turn ignition switch to Start. Engine must not crank.
3. Disengage PTO.
4. Press speed control pedal forward.
5. Turn ignition switch to Start. Engine must not crank.
CHECK FASTENERS
Be certain that all hardware is tightened to the proper
torque. Pay special attention to mower blades, guards
and safety shields.
CHECK PARKING BRAKE INTERLOCK
Ensure unit shuts off when direction control pedal is
depressed with the parking brake engaged.
CHECK PARKING BRAKE
With parking brake engaged, push unit. If unit rolls, adjust
parking brake. See Service and Adjustments.
CHECK TIRES
Adjust front tires to 12 - 15 PSI (82.8 - 103.4 kPa). Adjust
rear tires to 20 - 25 PSI (137.9 - 172.4 kPa).
CHECK AND CLEAN BATTERY
Clean Battery
Keep battery and its terminals clean. Inspect every 25
operating hours or monthly for best performance.
1. Remove battery cover.
MAINTENANCE
WARNING: AVOID INJURY. Read and
understand Maintenance and Service and
Battery Safety Rules in Safety section before
attempting any maintenance.
MAINTENANCE SCHEDULE
Intervals Service Performed
Before each use: Check Safety Interlock System
Check Fasteners
Check Parking Brake Interlock
Check Parking Brake
Check Tires
Check Hydraulic Oil Level
Clean Unit
Check Engine Oil Level
Check Air Cleaner
1
Check Air Intake
1
Every 25 hours: Check and Clean Battery
Clean Hydraulic Pump
Lubricate Unit
Service Precleaner
1
Check Engine Oil Cooler
1
Clean Hydraulic Oil Cooler
After first 50 hours: Replace Hydraulic Oil Filter
Every 50 hours: Inspect Spark Arrestor
Every 100 hours: Check Fasteners
Check Belts
Replace Air Cleaner
1
Change Oil
Clean Cooling Areas
1
Every 200 hours: Replace Hydraulic Oil Filter
Change Engine Oil Filter
Check Spark Plugs
Every season: Check Belts
Before storage: Check Fasteners
Check and Clean Battery
Clean Hydraulic Pump
Lubricate Unit
Clean Unit
CAUTION: Safety interlock system failure and
improper operation of unit can result in death or
serious injury. Test this system each time the
unit is operated. If this system does not function
as described, do not operate until repairs are
made.
WARNING: AVOID INJURY. Read and
understand Battery Safety Rules in Safety
section before proceeding.