GB - 18
HYDRAULIC FLUID
Check Hydraulic Fluid Level
1. Start the unit and run it to operating
temperature (about 10 minutes).
2. Cycle the control levers forward and
backward two or three times.
3. For units equipped with a hydraulic deck
lift, raise and lower the deck completely
two or three times.
4. Shut OFF engine. Engage parking
brake. Remove the ignition key.
5. Put seat in service position. See
6. Remove any dirt that may be around the
cap/dipstick on the hydraulic reservoir.
7. Remove cap/dipstick.
8. Check hydraulic oil level mark on
cap/dipstick.
9. Add Mobil 1 Extended Performance
15W50 or equivalent as needed
(Gravely p/n 00057100). Do not overfill.
Change Hydraulic Fluid and Filter
NOTE: Change the hydraulic oil filter and
hydraulic oil every 400 hours. Use Mobil 1
Extended Performance 15W50 Synthetic Oil
or equivalent for best component life (Gravely
p/n 00057100).
NOTE: When changing the oil, only about 1.5
quarts (1.4 liters) will drain. The rest of the oil
will remain in the pumps and motors.
1. Clean around dipstick cap and dipstick.
Remove dipstick.
2. Place container under oil filter to catch
oil.
3. Remove oil filter.
4. Allow tank to drain.
5. Lubricate rubber gasket on new oil filter
with clean hydraulic oil.
6. Spin new oil filter onto filter housing until
it makes contact. Tighten oil filter
another 1/2 turn.
7. Add new oil to the oil tank. It will take
about 1.5 quarts (1.4 liters). Use Mobil 1
Extended Performance 15W50
Synthetic Oil or equivalent for best
component life (Gravely p/n 00057100).
8. Check hydraulic oil level mark on
cap/dipstick.
9. Properly dispose of waste oil.
WARNING: HYDRAULIC FLUID
can result in severe burns. Fluid
in hydraulic system can penetrate
skin and result in serious injury or
death.
Be sure to stop the engine before
doing any work on hydraulic
parts.
Keep body and hands away from
pin holes or nozzles which expel
hydraulic fluid when under
pressure. Use paper or
cardboard, not hands, to search
for leaks.
Ensure all hydraulic fluid
connections are tight and all
hydraulic hoses and lines are in
good condition before applying
pressure to system.
FOREIGN FLUID INJECTED
INTO BODY can result in
gangrene. Fluid must be
surgically removed within a few
hours by a doctor familiar with
this form of injury.
1. Service
Position
2. Seat Knob
3. Steering
Levers
4. Parking
Brake
5. Battery
Figure 6
OF3361
FULL Mark
Operating
Range
OE0380
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