OPERATION In the following instructions it is assumed that the driver is familiar with motor trucks and tractors, and that he can coordinate the necessary movements of the shift lever and clutch pedal to make progressive and selective gear engagements in either direction, up or down.
Use Normal Double Clutching Procedures Between Shifts.
RT-6613 Gear Shift Lever Pattern and Selector Valve Positions
Shift this Pattern with Selector Valve Button in LOW Range
NOTE: For RTO-6613 models, the 7/12 and 8/13 speed locations are reversed.
UPSHIFTING Shift this Pattern with Selector Valve Button in INTERMEDIATE RANGE
1. With the transmission in neutral, start engine and bring vehicle’s air pressure to normal.
4. Shift from 1st speed through 2nd and to the 3rd speed gear position.
2. Make sure the selector valve button is in the LOW range position,
Shift this Pattern with Selector Valve Button in DIRECT
3. Shift into the 1st speed gear position. See page relating to transmission countershaft brake,
6
5. Move the selector valve button from LOW to iNTERMEDIATE range, and immediately shift to the 4th speed gear position. After the selector valve is moved, the auxiliary will shift as soon as there is a relief in torque.
