Gravely 992042 19HP-144Z - Manual (Page 15)

GB - 15
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 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 12.
Check Parking Brake Interlock System See Parking Brake Interlock System on page 12.
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 16.
Check Tires See Specifications on page 25 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 17.
Every 50
Hours
Lubricate Unit Oil all pivot points and pin connections. Grease lube fittings. See
Lubricate Unit on page 18.
Every 100
Hours
Clean Battery Keep battery and its terminals clean. See Clean Battery on page 18 .
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 Replacing Mower Belts on
page 21 and See Replacing the Hydro Pump Belt on page 21.
Every 500
Hours
Change Hydraulic Fluid and Filter Drain hydraulic fluid tank, replace hydraulic oil filter, refill system. See
Hydraulic Fluid on page 16.