GB - 15
1. Place hood in the full service position (see Service
Positions on page 17).
2. Turn right and left bypass valve levers counterclockwise
1/2 turn (figure 6).
3. Disengage parking brake.
4. Push unit to desired location.
5. Engage parking brake.
6. Turn bypass valve levers clockwise 1/2 turn.
TRANSPORTING UNIT
ALWAYS shut off engine, set parking brake, and remove key
when transporting unit on a truck or trailer. Tie unit down
securely. Do not tie down by linkages, guards, cables or
other parts that may be damaged.
FOR BEST PERFORMANCE
Cut grass when it is dry.
Keep mower blades sharp.
Keep mower deck properly leveled.
Adjust anti-scalp rollers to prevent scalping.
Do not set height of cut too low. For very tall grass, mow
twice.
Do not travel too fast.
Mow with the engine set at full throttle.
When mulching, only remove 1/3 of grass length per cutting.
Discharge clippings into areas already cut.
Vary cutting pattern with each mowing.
Do not allow grass or debris to collect inside of mower deck.
Clean after each use.
Proper maintenance can prolong the life of unit. The
following chart shows the recommended service schedule.
More frequent service may be required due to working
conditions (heavy loads, high ambient temperatures, dusty
conditions, or airborne debris).
See the maintenance instructions in Engine Manual for
additional information.
WARNING: Do not bypass transmission when on a
slope.
MAINTENANCE SCHEDULE
WARNING: AVOID INJURY. Read and understand
the entire Safety section before proceeding.
Interval Task Action
Each Use
Check Safety Interlock WARNING: Safety interlock system failure and improper operation of unit
can result in death or serious injury. Test this system each time unit is
operated. If this system does not function as described, do not operate until
repairs are made (see Safety Interlock System on page 12).
Check Parking Brake
Interlock System
See Parking Brake Interlock System on page 12.
Check Parking Brake Engage parking brake. Push unit. If unit rolls adjust parking brake (see Parking
Brake Adjustment on page 24).
Check Hydraulic Oil Level See Checking Hydraulic Oil Level on page 25.
Check Tires See Specifications on page 30 for correct tire pressure.
Clean Unit Clean engine, battery, seat, mower deck, etc. of all dirt and debris. Do not use
solvents, hard cleaners, or abrasives.
NOTE: Protect painted surfaces with automotive type wax.
Follow Engine Manual
Maintenance Schedule
Perform scheduled engine maintenance. Refer to Engine Manual for detailed
instructions.
Check Cooling System IMPORTANT: Do not use high-pressure water to clean radiator. High-pressure
water will damage radiator.
Check cooling system for dirt and debris in radiator screen, hoses, fan, etc. Refer to
Engine Manual for detailed instructions.
Every 25
Hours
Check Mower Blades Ensure mower blade hardware is tightened to 115 – 125 lbf-ft. (156 – 169 N•m).
Check mower blades for wear. Sharpen or replace mower blades as needed (see
Sharpening Mower BladE on page 19).
Every 50
Hours
Lubricate Front Axle and
Pivot Points
Oil all pivot points, pin connections and apply grease to front axle grease zerk (see
Lubricating Unit on page 18).
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