Gravely 915034 - ZT1640 Owner's/Operator's Manual page 15

Interval
Check Battery
Lubricate Unit
25 Hours
or Every
Season
Clean Air Filter
Precleaner
Change Engine Oil
50 Hours Check Fasteners
or Every
Season
Inspect Muffler and
Spark Arrestor
Clean Air Filter
Cartridge
Change Oil Filter
Replace Spark Plug
(915034, 036)
Replace Fuel Filter
100 Hours
(915034, 036)
or Every
Season
Clean Cooling
System
Check All Belts
Check Mower Blade
Stopping Time
Clean/Replace Spark
Plugs (915038, 040)
Yearly
Clean/Replace Fuel
Filter (915038, 040)
1
Service more often when operating under heavy loads, high temperatures, or dusty conditions.
Replace air filter precleaner and cartridge if very dirty.
2
Change after first 5 to 8 hours of use. Change every 25 hours when operating under heavy loads or
in high temperatures.
Task
Keep battery and battery terminals clean (see Cleaning Battery
and Battery Cables on page 20).
Apply grease to the two
front wheel zerks.
Clean air filter precleaner (item 2). Refer to Engine Manual for
1 detailed instructions.
2 Drain engine oil by opening oil drain petcock (item 6). Refer to
Engine Manual for detailed instructions.
Check mower blade mounting hardware and all other fasteners.
Replace fasteners that are missing or damaged. Tighten all nuts
and bolts to the correct torque value.
Replace muffler and (if equipped) spark arrestor if corroded.
Contact your Gravely Dealer.
Clean air filter cartridge (item 2). Refer to Engine Manual for
1 detailed instructions.
Clean oil filter (item 4). Refer to Engine Manual for detailed
instructions.
Replace spark plug (item 5). Refer to Engine Manual for
detailed instructions.
Replace fuel filter (item 3). Refer to Engine Manual for detailed
instructions.
Clean cooling system (item 1). Refer to Engine Manual for
1 detailed instructions.
Replace worn or deteriorated belts.
• Check hydrostatic belt (see Hydrostatic Belt Replacement
• Check PTO belt (see PTO Belt Replacement on page 21).
See Test Mower Blade Stopping Time on page 22.
Clean/replace spark plugs (item 5). Refer to Engine Manual for
detailed instructions.
Clean/replace fuel filter (item 3). Refer to Engine Manual for
detailed instructions.
on page 22).
GB - 15
Action
Zerk