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Operation - Section 3
Page 3-14
(12) Do Not Shift Light
This light comes on anytime the on-board computer
finds a potentially serious problem in the system. The
computer will cause the transmission to lock- in-gear
and also to disengage the lockup clutch. These actions
by the computer reduces the possibility of damage to
the truck and transmission. The hold-in- gear feature
prevents upshifts and downshifts when a problem is
detected in the operation of the transmission. The
hold-in-gear circuit permits the transmission to con-
tinue to operate in the gear it was in at the time the DO
NOT SHIFT light and buzzer came "On". Selection of a
different gear range will have no effect on the transmis-
sion. The hold-in-gear circuit is released when the
engine is shut-off. If the problem causing the DO NOT
SHIFT light is still present when the engine is restarted,
the transmission will be in " Neutral" and will remain in
"Neutral" until the probem is corrected.
RESET PROCEDURE - When the DO NOT SHIFT
LIGHT and/or CHECK TRANS light (on instrument
panel) comes "On", the system can be reset. To reset,
bring the vehicle to a stop at a safe location and
shutdown engine. Wait about 10 seconds and restart
engine. If the problem is temporary, the DO NOT SHIFT
(12) and CHECK TRANS lights will not come back "On"
and the truck can be operated in a normal manner. If
the problem causing the DO NOT SHIFT light is still
present when the engine is restarted or comes again
in operation, notify maintenance personnel.
FIGURE 3-3. SEAT ADJUSTMENT
1. Height Adjust Lever
2. Fore/Aft Adjust Lever
3. Weight Adjust Knob
4. Weight Indicator
5. Cushion Tilt latch lever
Operator Seat
The operator's seat provides a fully adjustable cush-
ioned ride for the driver's comfort and ease of opera-
tion. The seat is independently mounted from the cab
for easy maintenance and repair.
Adjustment
The following adjustments must be made while sitting
in the seat.
1. To adjust seat height:
a. Depress the "Height Adjust " lever (1, Figure 3-3).
b. Adjust seat assembly to desired height.
2. To adjust fore/aft location of seat:
a. Raise adjustment lever "Lift to Slide" (2).
b. Move seat backward or forward as desired.
3. To adjust weight:
a. Turn knob "Weight Adjust" (3).
b. Moving knob clockwise decreases cushioning
effect of seat and turning counterclockwise in-
creases cushioning effect.
c. Proper adjustment results in Weight Indicator (4)
being flush with seat base while operator is
seated.
4. To adjust seat cushion:
a. Raise "Cushion Tilt Latch" lever (1, Figure 3-4) on
left side of seat.
b. When lever is unlatched, choose between two
different positions.
FIGURE 3-4. SEAT TILT LATCH
1. Cushion Tilt latch lever
OM3012.2
Operator Cab and Controls
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