JLG 1100S Service Manual - Manual (Page 222)

SECTION 4 - BOOM & PLATFORM
4-74 – JLG Lift – 3121256
Bleeding After Installation
NOTE: Bleeding will be necessary if excessive backlash is
displayed after the actuator is installed. To do this,
bleeder valves must be installed in the actuator at the
locations shown below. The following steps are rec-
ommended when a minimum of two gallons (8 liters)
is purged.
1. Connect a 5 foot (1.5 m) long 3/16" inside diameter,
5/16" outside diameter clear vinyl drain tube to each
of the two bleeder valves. Secure the tubes in place
with hose clamps.
2. Place the end of the tubes in a clean 5 gallon (19 L)
container to collect the purged oil. The oil can be
returned to the reservoir when the procedure is com-
plete.
3. Open both bleeder valves 1/4 turn. Using the
hydraulic system, rotate the platform to the end of
rotation and maintain hydraulic pressure. Oil with
small air bubbles should be seen flowing through
the tubes. Allow 1/2 gallon (2 L) of oil to be purged
from the actuator.
4. Keep the bleeder valves open and rotate the plat-
form in the opposite direction to the end of rotation.
Maintain hydraulic pressure until an additional 1/2
gallon (2 L) of oil is pumped out.
5. Repeat steps 3 and 4. After the last 1/2 gallon (2 L)
of oil is purged, close both bleed nipples before
rotating away from the end of rotation.
A,B,D
C,D
E
A
B
C
D
E Torque to 50 ft.lbs. (68 Nm)
Loctite #242
Torque to 480 ft. lbs. (650 Nm)
Check torque every 150 hours of operation
Torque to 75 ft. lbs. (102 Nm)
Figure 4-37. Platform Support Torque Values