Transmission Shifting

Question 1

Range shift could have a ratio change of what?

Answer 1

30-40%

Question 2

Splitter shifts could have ratio change of what?

Answer 2

15-20%

Question 3

Why must air for the shift system be filtered?

Answer 3

Small orifices and lines could be easily plugged

Question 4

Trans shift are pressure is usually regulated to?

Answer 4

58-63 PSI

Question 5

The slave valve is used mainly to control_______?

Answer 5

The range cylinder

Question 6

Range shift

Answer 6

When button is moved up it blocks incoming air that is moving rod in slave valve and exhausts air already there. Once the actuating pin is released the rod moves to centre and the air in low side is released and air is then applied to high side

Question 7

Actuating pin

Answer 7

Is forced into slave valve by air valve shaft every time one of the ship rails is in a position other then neutral

Question 8

What are 2 types of air hose used in shift mechanism?

Answer 8

1/8 and 5/32 synflex

Rubber coated cloth braid design- rubber hose

Question 9

Splitter shift

Answer 9

Has air on high side (small area) at all times. When high split is selected the air coming to low side (large area) is blocked and exhausted the high air pushes cylinder. Air to signal the large area air is sent from the master control valve via the SP line.

Question 10

What system must be active in order for the semi-automated trans function to work?

Answer 10

Cruise control

Question 11

Basic components of the Autoshift trans (8)

Answer 11

Shift controller
Visual display panel
Transmission controller
Main section electric shift assembly (x-y shifter) (MSESA)
Shaft speed sensors
Range and/or splitter shift assembly
Inertia brake
Wiring harness

Question 12

Auto shift, shift controller

Answer 12

Contains the electronic control unit, has console that allows for operator input (brains of system)

Question 13

Auto shift, dash display

Answer 13

display to provide info to the operator

Question 14

Auto shift, transmission controller

Answer 14

Is responsible for all of the transmission shifting operations. Receives info from the shift controller and directs output devices what to do. (think of as a output control module)

Question 15

Auto shift, Main section electric shift assembly

Answer 15

Responsible for main section shifting. done by use of 2 reversible DC motors, 1 for rail selection, 1 for gear selection. Has two position sensor to monitor finger location

Question 16

Auto shift, inertia brake

Answer 16

Used to increase the rate of deceleration. When coil is energized the one half of ball ramp slows, the other half attached to clutch pack starts to walk up ramp squeezing clutch pack to slow countershaft, and input shaft

Question 17

Auto shift, speed sensors

Answer 17

Input speed - taken off upper pto gear and mounted in the front of shift bar housing
Main shaft speed - taken off aux countershaft and mounted in the rear of the shift bar housing
Output speed - taken off output shaft and mounted in rear bearing housing

Question 18

The main supply air line must be properly routed and secure to prevent: (2)

Answer 18

Damage from foreign objects

Becoming a moisture trap