Platform Controls - Electrical - Skyjack SJKB-40-D Operating Maintenance Instructions & Part List

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
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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
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Ma40-208
JUN. 1999
To return brakes to normal operation depress red
plunger or operate any hydraulic function.
Base Controls - Hydraulic
Turret Rotation Speed Control Valve
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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
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.
NOTE
Ma40-213
Ma40-209
SECTION 2, Page 5
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