Gravely COMPACT-PRO 991072 - Manual (Page 19)

GB - 19
HYDRAULIC FLUID
Check Hydraulic Fluid Level
Check the system with the unit cold and
parked on a flat, level surface.
Then run the unit for about one minute and
recheck the levels.
To Add Hydraulic Fluid:
1. Remove the cap from the expansion
tank.
2. Fill the expansion tank with 20W-50
engine oil with an SL API classification
until oil level reaches the cold fill line on
the tank.
3. Install the expansion tank cap and then
purge the system. See Purging the
Hydraulic System on page 20.
Change Hydraulic Fluid and Filter
NOTE: Change hydraulic fluid and filter after
the first 75 hours of operation and then every
400 hours. Use 20W-50 engine oil with an SL
API classification.
1. Place container under oil filter to catch
oil.
2. Remove the filter guard and oil filter from
the transaxle.
3. Remove the oil drain plug or fitting from
the inlet port and allow the transaxle to
drain completely.
4. Clean the filter mounting surface and
then lubricate rubber gasket on new oil
filter with clean hydraulic oil.
5. Spin new oil filter onto filter housing until
it makes contact. Tighten oil filter
another 3/4 turn.
6. Install the filter guards removed in
step 2. Tighten the mounting screws to
65 lbf-in (7.3 N•m).
7. Fill with 20W-50 engine oil with an SL
API classification until oil appears at the
bottom of the drain plug (about 2 quarts
per transaxle). Install the drain plug and
tighten it to 180 lbf-in (20.3 N•m).
8. Repeat steps 1–7 for the other
transaxle.
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.
Figure 6
1. Service Position
2. Steering Levers
3. Parking Brake
4. Battery
2
3
4
OF4310
1
2
The hydraulic fluid should be at the cold
fill line of the expansion tank.
Figure 7