Gravely Pro-Master 260 Owner's/Operator's Manual page 35

Check Adjustment
(Figure 26)
NOTICE: Be sure to check parking brake on
both sides of unit.
NOTICE: The clearance between jam nuts
and trunnion should be 1-1/4" (3.2 cm).
Adjusting the Parking Brake
(Figure 26)
1. Engage parking brake.
2. Turn jam nuts counterclockwise until the
spring is completely extended and there
is no pressure on the spring.
3. Measure the spring length. Depending
on the model, the extended spring
length may be 1-3/4" (4.4 cm) or 2"
(5.1 cm).
4. Compress the spring 1/2" (1.3 cm) by
turning the jam nuts clockwise.
NOTICE: The clearance between jam nuts
and trunnion should be 1-1/4" (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 – 1/8" (1.59 to 3.18 mm) between
return nuts and trunnion.
7. Tighten return nuts together.
1-1/4"
(3.2 cm)
2
6
5
4
3
1. Parking Brake Lever
2. Brake Rod
3. Return Nuts
4. Trunnion
5. Spring
6. Jam Nuts
1/16 – 1/8"
(1.59 to 3.18 mm)
1
2
Figure 26
HYDRAULIC OIL SYSTEM
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.
Checking Hydraulic Oil Level
Operating
Range
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 Position on page 24).
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 15W-50 synthetic motor oil (Gravely
p/n 00057100) or equivalent. Do not
overfill.
EN - 35
FULL
Mark