Operation - Section 3 OM3005.2 Page 3-14 Operator Cab and Controls (12) Do Not Shift Light Operator Seat 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. 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 fore/aft location of seat: a.
Raise adjustment lever "Lift to Slide" (2, Figure 3-3). b. Move seat backward or forward as desired. 2. To adjust seat height: 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. a.
Depress the "Height Adjust " lever (1). 3. To adjust weight: b. Adjust seat assembly to desired height. 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 3-3. SEAT ADJUSTMENT 1. Height Adjust Lever 3. Weight Adjust Knob 2. Fore/Aft Adjust Lever 4. Weight Indicator 5. Cushion Tilt latch lever FIGURE 3-4.
SEAT TILT LATCH 1. Cushion Tilt latch lever