Bobcat S850 - Lift Arm Support Device Maintenance

108 S850 Operation & Maintenance Manual
SEAT BAR RESTRAINT SYSTEM
Description
The Seat Bar Restraint System has a pivoting seat bar
wit
h armrests.
The operator controls the use of the seat bar. The seat
b
ar in the down position helps to keep the operator in the
seat.
Models with Standard Controls with Power Assist
(SCPA) have hydraulic valve spool interlocks for the lift
and tilt functions. The spool interlocks require the
operator to lower the seat bar in order to operate the foot
pedal controls.
When the seat bar is down, the engine is running, the
PRESS
TO OPERATE LOADER button is activated, and
the brake is released, the lift, tilt, and traction drive
functions
can be operated.
When the seat bar is up, the lift and tilt control pedals are
loc
ked when returned to the NEUTRAL position.
Models with Selectable Joystick Controls (SJC) have
electrical deactivation of lift and tilt functions. Activation of
functions require the operator to lower the seat bar.
When the seat bar is down, the engine is running, the
PRESS
TO OPERATE LOADER button is activated, and
the brake is released, the lift, tilt, and traction drive
functions
can be operated.
When the seat bar is up, the lift and tilt functions are
d
eactivated even though the joysticks do not
mechanically lock.
Inspecting
Sit in the seat and fasten the seat belt. Engage the
p
arking brake. Pull the seat bar all the way down. Start
the engine. Press the PRESS TO OPERATE LOADER
button.
Operate the hydraulic controls to check that both the lift
a
nd tilt functions operate correctly. Raise the lift arms
until the attachment is about 600 mm (2 ft) off the ground.
Raise the seat bar. Move the hydraulic controls. Pedals (if
equipped) m
ust be firmly locked in the NEUTRAL
position. There must be no motion of the lift arms or tilt
(attachment) when the controls are moved.
Lower the seat bar, press the PRESS TO OPERATE
L
OADER button and lower the lift arms. Operate the lift
control. While the lift arms are going up, raise the seat
bar. The lift arms must stop.
Lower the seat bar, press the PRESS TO OPERATE
LO
ADER button, lower the lift arms and put the
attachment flat on the ground. Stop the engine. Raise the
seat bar. Operate the foot pedals (if equipped) to be sure
they are firmly locked in the NEUTRAL position.
Maintaining
See the SERVICE SCHEDULE for correct service
in
terval. (See SERVICE SCHEDULE on Page 106.)
Figure 152
Use compressed air to clean any debris or dirt from the
piv
ot parts. Do not lubricate. Inspect all mounting
hardware. The correct hinge bolt (Item 1) torque is 34 -
38 N•m (25 - 28 ft-lb). The seat bar sensor nut (left side
only) (Item 2) [Figure 152] torque is 6 - 8 N•m (50 - 70 in-
lb).
If the seat bar system does not function correctly, replace
parts that are worn or damaged. Use only genuine Bobcat
replacement parts.
WARNING
The seat bar system must deactivate the lift and tilt
control functions when the seat bar is up. See your
Bobcat dealer for service if hydraulic controls do not
deactivate.
W-2465-0111
P-90643A
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110 of 210
Dealer Copy -- Not for Resale