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Regular Maintenance
CHECK / ADD ENGINE OIL
Refer to Figure 13 for dipstick and oil fill locations.
Refer to the engine owners manual for specific engine
oil check and fill procedures. Also refer to the engine
owners manual for specific engine oil and filter change
procedures.
CHECK / CHANGE AIR FILTER
Refer to the engine owners manual for specific air filter
service procedures.
CHECK HYDRAULIC OIL LEVEL
NOTE: Do not open the hydraulic oil reservoir unless oil
is being added.
1. Visually check that the hydraulic oil level is filled to
the recess area (A, Figure 14) of the hydraulic oil
reservoir.
2. If necessary, remove the reservoir cap (B) and add
either Mobil 1™, 15W-50 synthetic oil or Castrol
Syntec™ 5W-50 oil. DO
NO
T use conventional oils.
Make sure area around the filler neck is free of dust,
dirt, or other debris.
HYDRAULIC OIL FILTER CHANGE
Change Interval: Every 500 Hours
Filter Part Number: 21357
NOTE: Removing the oil filter from the filter base will
drain the oil reservoir. Have a suitable container ready
to catch any spilled oil. Ferris recommends this be a
dealer-only service item.
1. Locate the hydraulic oil filter (A, Figure 15) behind
the oil reservoir.
2. Fill the new filter with oil. Lubricate the new filter
seal with a few drops of oil.
3. Remove the oil filter and quickly thread the new filter
onto the filter base until the gasket makes contact,
then tighten 3/4 of a turn more.
4. Refill reservoir with fresh oil to replace any oil lost
during filter change.
5. Raise the rear of the unit and secure with jackstands.
Chock the front wheels to prevent the unit from
rolling. Run the unit for several minutes to purge any
air from the hydraulic system and check the hydraulic
oil level.
IMPORTANT NOTE: Use caution after changing the fil-
ter; air in the hydraulic system may affect the respon-
siveness of the control levers. Repeat step 5 until the air
is out of the system.
Figure 14. Hydraulic Oil Reservoir
A. Tank Recess (“FULL” level)
B. Cap
A
B
Figure 13. Change Oil & Filter
A. Oil Fill Cap
B. Crankcase Dip Stick
Gas Model
Diesel Model
B
A
B
A
21
A
Figure 15. Hydraulic Oil Filter Location
A. Oil Filter