Trailer Jockey Operators Handbook
9
Do not depress the fifth wheel lock pushbutton unless the
trailer is properly positioned and does not pose a threat to
personnel or property.
Table 2-1 Controls & Indicators (Cont.)
Item Name Function
30 Fifth Wheel Lock Pushbutton control that releases fifth wheel
locks when pressed, releasing trailer.
31 Transmission Control Pushbutton control pad that controls the
transmission. Refer to Figure 2-3 for
details.
32 Fifth Wheel Control
Lever
Three-position control lever that positions
the fifth wheel.
LOWER - moves fifth wheel down.
HOLD - Maintains fifth wheel elevation
RAISE - Elevates fifth wheel
33 Trailer Air Supply
Valv e
Push-pull knob that applies air pressure to
trailer brake system when depressed; pull
knob out to evacuate air from trailer brake
system
34 Parking Brake Control Push-pull knob that applies parking brake
when pulled out. Depress knob to release
parking brake.
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