Hydraulic System--High-Range Operation (Manual Selector at 1-2--High-Intermediate Inhibitor Acting)

e. Throttle Valve (TV) Circuit (blue, yellow--

(2) The rear oil pump rotates in the reverse

fig. 2-8). In reverse-range operation, the throttle

direction and allows a small volume of oil to return

valve (TV) circuit functions as described in

to the sump. This oil must come through the orifice

connecting the front and rear oil pump output lines.

Oil passing through this same orifice keeps the rear

2-20. Hydraulic System--High-Range Oper-

fluid velocity governor supplied.

ation (Manual Selector at 1-2--High-

b. Converter-In Circuit (yellow--fig. 2-8). In

Intermediate Inhibitor Acting)

reverse-range operation, the converter-in circuit

NOTE

functions as described in paragraph 2-14b.

Inhibitors are safety devices which provide

c. Front Governor (Gl) Circuit (blue, black--

some measure of protection against engine

fig. 2-8). In reverse-range operation, the front

overspeed if the operator inadvertently

governor c i r c u i t functions as described in

downshifts above prescribed speed.

a. Inhibitor Prevents 3-2 Downshift at Excessive

d. Reverse-Range Clutch Circuit (blue, red--fig.

2-8). The reverse-range clutch circuit is supplied, at

the manual selector valve, by main pressure.