Gravely Pro-Master PM 320 HD Owner's/Operator's Manual page 19

SERVICE AIR FILTER OUTER
ELEMENT
Service air filter outer element every 25
hours. Service more often when operating in
dirty or dusty conditions. See engine manual
for detailed instructions.
CHECK ENGINE OIL COOLER
Check engine oil cooler every 25 hours.
Check more often when operating in dirty or
dusty conditions. See engine manual for
detailed instructions.
CLEAN HYDRAULIC OIL COOLER
Blow out hydraulic oil cooler with compressed
air every 25 hours of operation to remove
dust and debris.
REPLACE HYDRAULIC OIL
FILTER
Replace hydraulic oil filter after the first 75
hours of operation and every 400 hours
thereafter.
1. Clean around dipstick cap and dipstick.
Remove dipstick.
2. Place container under oil filter to catch
dripping oil.
3. Remove oil filter.
4. Install new oil filter.
5. Check hydraulic oil level and add if
necessary.
6. Clean up any oil spills.
IMPORTANT: See Changing Hydraulic Oil on
page 23.
INSPECT MUFFLER/SPARK
ARRESTOR
Inspect muffler and spark arrestor every 50
hours. Replace muffler if corroded.
CHECK BELTS
Check belts every 100 hours and every
season. Replace worn or deteriorated belts.
Replace belts to accommodate belt stretch
and wear in the traction drive or mower drive.
See Replacing the Drive Belt on page 20 for
procedures.
REPLACE AIR CLEANER
Replace air cleaner every 100 hours.
Replace more often when operating in dirty or
dusty conditions. See engine manual for
detailed instructions.
CHANGE OIL AND FILTER
See engine manual for recommendations and
detailed instructions.
CLEAN COOLING AREAS
Remove shrouds and clean cooling areas
every 100 hours. Clean more often in dirty or
dusty conditions. See engine manual for
detailed instructions.
CHECK SPARK PLUGS
Check condition of spark plugs and spark
plug gap every 200 hours. See engine
manual for detailed instructions.
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