Hydraulic System--Intermediate-Range Operation (Manual Selector at 1--Inter-mediate-Low Inhibitor Acting)

a n d inhibitor pressure, t h e d o w n s h i f t t o i n -

(1) Figure 2-9 illustrates the hydraulic system

termediate range will occur. This is an automatic

in high-range operation even though the manual

shift, which lags behind the manual shift.

selector has been moved to a position which does

b. Other Functions Same as 1-2-3 Operation ( f i g .

not indicate high-range operation. This condition

2 - 9 ) . In high-range operation (selector at 1-2

results when vehicle (transmission output) speed is

position), the circuits not involved in action of the

too great for safe operation in intermediate-range at

high-intermediate inhibitor operate as described in

the time a manual downshift is made.

paragraph 2-17 for high-range (1-2-3) operation.

(2) When the manual downshift is made, rear

governor (G2) pressure is sufficient to continue

Hydraulic System--Intermediate-Range

h o l d i n g the intermediate-high shift plug, shift

Operation (Manual Selector at 1--Inter-

valve, and blocker plug upward against spring force

mediate-Low Inhibitor Acting)

and inhibitor pressure. This extends high-range

NOTE

operation of the transmission during the period the

Inhibitors are safety devices which provide

vehicle is moving at excessive speed.

some measure of protection against engine

(3) When vehicle speed decreases, G2 pressure

overspeed if the operator inadvertently

also decreases. When G2 pressure falls to a value

downshifts above prescribed speed.

which will no longer hold the intermediate-high

shift plug and valve upward against spring force