Work Platform Major Component Identification - Skyjack SJKB-40-D Operating Manual

WORK PLATFORM MAJOR COMPONENT IDENTIFICATION

TELESCOPING
BOOM
ASSEMBLY
TURRET
BASE
CONTROL
PANEL
DRIVE
CHASSIS
Figure 1-2. SKYJACK SJKB Boom Work Platform(Model SJKB-40-D Shown)
SECTION 1, Page 4
OPERATOR'S
CONTROL CONSOLE
PLATFORM
BOOM
JIB
RISER
ARM
DEC. 1999
JUN. 1999 SJKB-40-D, SJKB-40-D/F
Step 4. Once the machine has been loaded or unloaded
unscrew the override stem (counter-clockwise)
until it stops and reset the retaining nut.
CAUTION
DO NOT tow. This procedure is intended for loading and
unloading the machine using a winch line and should not
be used to tow the machine.
Brake Manifold and Parking Brake Release
Procedure
2
Ma40-208
Figure 2-7. Brake Manifold
BRAKE MANIFOLD - This manifold is located near the
Base Control Panel on the rotating turret, and accessed
by opening the hydraulic/electric cabinet door. It containes
the following controls:
1. PARKING BRAKE OVERRIDE VALVE
PLUNGER
2. PARKING BRAKE RELEASE HAND PUMP
DANGER
DO NOT release the brakes on an incline without the
wheels chocked.
1. PARKING BRAKE OVERRIDE VALVE PLUNGER -
When this red plunger is pulled out, the brake hydraulic
circuit is isolated allowing use of the parking brake hand
pump.
2. PARKING BRAKE RELEASE HAND PUMP - The
hand pump MUST be used to disengage the parking
brakes. To release the parking brakes the procedure
below MUST be followed:
Step 1. Firmly pull out the red plunger on the Brake
Manifold until the knob remains out.
Step 2. Grasp the black hand pump plunger and pump
rapidly until firm resistance is felt and the brake
pressure gauge reaches 700 psi. The brakes are
now release. (Although the gauge reading may
decrease the brakes will remain released until
pressure drops below 300 psi.)
SJKB-40-D, SJKB-40-D/F
NOTE
To return brakes to normal operation depress red
plunger or operate any hydraulic function.
Base Controls - Hydraulic
Turret Rotation Speed Control Valve
1
1
Figure 2-8. Turret Rotation Speed Control Valve
1. TURRET ROTATION SPEED CONTROL VALVE
1. TURRET ROTATION SPEED CONTROL VALVE -
Located on the lower left side of the main manifold in the
hydraulic/electric cabinet, this rotary valve when rotated
to a fully closed position (clockwise) allows maximum
turret rotation speed. By opening the valve
(counterclockwise) the turret rotation speed can be
reduced.
Platform Controls - Electrical
Foot Switch
Ma40-209
Figure 2-9. Foot Switch
1. FOOT SWITCH
1. FOOT SWITCH - The foot switch is located on the
platform. When the foot switch is depressed and held,
power is brought to the controls on the operator's control
console. When the foot switch is released, the controls
on the operator's control console are cut out.
IMPORTANT NOTE
The foot switch MUST be depressed and held to use
any control on the operator's control console.
WARNING
Before releasing the foot switch, the controllers should
be returned to the neutral position. Work platform
motion will stop when the foot switch is released.
JUN. 1999
SECTION 2, Page 5
Ma40-213
1