GB - 21
*
Change oil after first 8 hours of operation and every 100 hours thereafter.
MAINTENANCE SCHEDULE
Period
Service
Task
Each
Use
Check Safety Interlock
System
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
Check Air Cleaner
Check the air cleaner element before each use. See
engine manual for detailed instructions.
Check Engine Oil
Check the engine oil level before each use. Never operate
the engine when the oil level is low. See engine manual for
detailed instructions.
Check Engine Cooling
Check the engine air cooling system before each use. See
engine manual for detailed instructions.
Check Fasteners
Check all nuts, bolts, and other fasteners before each use.
Replace missing or damaged fasteners.
Check Tire Pressure
Check tires for proper inflation, excessive wear or damage
before each use. The correct air pressure is 8 – 16 psi (55
– 110 kPa).
Follow Engine Manual
Maintenance Schedule
Perform scheduled engine maintenance. See engine
manual for detailed instructions.
Every 25
Hours
Check All Belts
Check all belts for wear or damage. If belts slip, check for
damaged belt tensioner.
Mower Blades
Check mower blades for wear. Sharpen or replace as
needed. See
Clean Air Cleaner
Foam Element
See engine manual for detailed instructions.
Every 50
Hours
General Lubrication
Oil all pivot points and pin connections. Grease lube
fittings. See
Every
100
Hours
Change Engine Oil
*
Open the petcock to drain oil through oil drain hose on the
right side of engine. See engine manual for additional
instructions.
Check Fuel Filter
See engine manual for detailed instructions.
Check Spark Plug
See engine manual for detailed instructions.
Check Muffler
Check muffler for damage or wear. Replace if necessary.
Clean Air Cleaner
Paper Element
See engine manual for detailed instructions.
