TM 5-2420-232-10
0004
OPERATOR'S SEAT CONTROLS CONTINUED
Pneumatic Controls. The pneumatic controls operate airbags beneath and inside the seat to provide the suspension and
4.
lumbar/upper back support features. To raise or lower the seat and to adjust the level of suspension, increase or decrease
the air in the support bag using control button (Figure 17, Item 4). Lower lumbar support can be adjusted by increasing/
decreasing the air pressure using the lumbar control button (Figure 17, Item 5). Upper back support can be adjusted using
the upper back control button (Figure 17, Item 6).
435-A0254
Figure 17. Operator Seat Controls - Pneumatic Controls
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5.
Lock-Out. In the event of a failure of the air suspension system, the seat can be locked in a raised position to improve the
operator s seating position until a repair can be effected.
To install this facility, manually raise the seat base by pulling up under the front edge of the seat cushion and operating the
lock lever (Figure 18, Item 7) until the locking pegs engage into the seat frame.
435-A0255
Figure 18. Operator Seat Controls - Lockout
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0004-17
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