freightliner S2 Operator's Manual page 41

Cab Features
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1. Backrest Tilt Knob
2. Lumbar Support Switch
3. Height Adjustment Switch
4. Seat Slide Lever
5. Front Cushion Height Adjustment Handle
6. Isolator Handle
7. Rear Cushion Adjustment Knob
Fig. 5.11, National 2000 Series Seat
Ride Height Adjustment
To raise or lower the height of the seat, use the
height adjustment switch on the side of the seat.
Sears Seat
Seat Slide Adjustment
Push the seat slide (fore-and-aft adjustment) lever,
shown in Fig. 5.12, all the way to the left and slide
the seat forward or backward, as desired. Release
the lever to lock the seat in the desired position.
Isolator
To engage the isolator (if installed), move the seat
slide and isolator lever shown in
to the right. To lock out the isolator, move the isolator
lever to the center position.
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Fig. 5.13 all the way
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1. Seat Slide Lever
2. Seat Cushion Tilt Adjustment
3. Ride Height Knob
4. Lumbar Support Lever
5. Backrest Lever
Fig. 5.12, Sears Low Profile Seat
Lumbar Support
Move the three-position lumbar support lever upward
to increase lumbar support (firmer). Move the lever
downward to decrease lumbar support (less firm).
NOTE: This three-position lever (see inset) does
not rotate a full 360 degrees.
For seats with air support, use the aft rocker switch
on the control panel on the left-hand side of the seat.
See Fig. 5.14. Press up to make the seat firmer;
press down to make the seat less firm.
Seat Cushion Tilt
To raise the seat cushion, lift upward on the front of
the seat cushion, and then push it rearwards. To
lower the seat cushion, pull forward on the front of
the seat cushion, and then push downwards.
Backrest Adjustment
To adjust the backrest, push downwards on the back-
rest lever just below the bottom of the backrest cush-
ion. With the lever down, lean forward or backward
to the desired position. Release the lever to lock the
backrest in place.
Ride Height Adjustment
Push the ride height knob inwards to inflate the air
cylinder, raising the height of the seat. Pull the ride
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