GB-12
Proper maintenance can prolong the life of unit. The following
charts show 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 the Engine Manual for
additional information.
MAINTENANCE SCHEDULE
WARNING: AVOID INJURY. Read and understand
entire Safety section before proceeding.
Period Service Task
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 the unit is operated. If this system does not function as
described, do not operate until repairs are made. See Safety
Interlock System on page 8.
Check Parking Brake Interlock System See Parking Brake Interlock System on page 8.
Check Hydraulic Fluid Check hydraulic oil level mark on cap/dipstick. Add 15W50 synthetic oil as
needed. Do not overfill. See Check Hydraulic Fluid Level on page 13.
Check Tires See Specifications on page 21 for correct tire pressure.
Follow Engine Manual Maintenance
Schedule
Perform scheduled engine maintenance. Refer to engine manual for detailed
instructions.
Every 25
Hours
Check Mower Blades
Check mower blades for wear. Sharpen or replace as needed.
See Mower
Blades on page 14.
Every 50
Hours
Lubricate Unit Oil all pivot points and pin connections. Grease lube fittings. See Lubricate
Unit on page 15.
Check Brake Gap Adjust gap if necessary. See Adjusting the Parking Brake on page 17
Every 100
Hours
Clean Battery
Keep battery and its terminals clean. See Clean Battery on page 15.
Check Fasteners Check mower blade mounting hardware and all other fasteners. Replace
missing or damaged fasteners. Tighten all nuts and bolts to their correct
torque value.
Check Belts Replace worn or deteriorated belts. See Remove PTO Belt on page 18 and
Replacing the Hydro Pump Belt on page 18.
Every 500
Hours
Change Hydraulic Fluid and Filter Drain hydraulic fluid tank, replace hydraulic oil filter, refill system. See
Hydraulic Fluid on page 13.
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