GB - 29
3. Measure the spring length. Depending on the model, the
extended spring length may be 1-3/4 in. (4.4 cm) or 2 in.
(5.1 cm).
4. Compress the spring 1/2 in. (1.3 cm) by turning the jams
nuts clockwise.
NOTE: The clearance between jam nuts and trunnion
should be 1-1/2 in. (3.81 cm) or 1-1/4 in. (3.2 cm).
5. Tighten jam nuts together.
6. Turn return nuts clockwise to decrease the distance or
counter clockwise to increase the distance until there is
1/16 to 1/8 in. (1.59 to 3.18 mm) between return nuts
and trunnion.
7. Tighten return nuts together.
HYDRAULIC OIL SYSTEM
Checking Hydraulic Oil 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. Place unit in the service position (see SERVICE
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 Mobile 1 Extended Performance 15W50 as needed.
Do not overfill.
Changing Hydraulic Oil and Filter
NOTE: Change the hydraulic oil filter and hydraulic oil every
500 hours. Use Mobil 1 Extended Performance 15W50
Synthetic Oil for best component life.
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 4 quarts (4
liters). Use Mobil 1 Extended Performance 15W50
Synthetic Oil for best pump and wheel motor life.
8. Check hydraulic oil level.
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. Parking Brake Lever
2. Brake Rod
3. Return Nuts
4. Trunnion
5. Spring
6. Jam Nuts
Figure 27
OF3303
1-1/2-in. (3.81 cm)
or 1-1/4 in. (3.2 cm)
1/16 to 1/8-inch
(1.59 to 3.18 mm)
1
2
3
4
5
6
2
FULL Mark
Operating
Range
OE0380
