Section II. ADJUSTMENTS AND TESTS

TM 10-3930-633-34

through the oil cooler, then the cooled fluid is

j. Reverse. When the manual valve is shifted

used in the transmission lubricating circuit.

into reverse, control pressure is directed to apply

(2) A spring-loaded check valve is used in the

the rear clutch and rear band. Governor supply

circuit to maintain about 3-5 PSI in the converter

pressure is cut off by the manual valve; hence, the

out circuit. When the converter out circuit ex-

transmission cannot shift automatically. Rear

ceeds 3-5 PSI, the check ball opens against spring

clutch pressure is also directed to the throttle

pressure and cooled fluid is directed to lubricate

valve to regular throttle pressure to obtain the

the various parts of the transmission gear train.

correct line pressure for the reverse circuit.

k. Fluid Cooling and Lubricating System.

(1) The converter out circuit is directed

Section Il. ADJUSTMENTS AND TESTS

7-4. General

Prior to removal of the transmission from the

vehicle for disassembly or repair, make certain

that a band adjustment as outlined below is not

the cause of malfunction. The tests outlined in the

following paragraphs will aid in determining the

exact cause of the malfunction.

7-5. Band Adjustments

a. Front Band Adjustment.

(1) Drain the fluid from the transmission. If

the same fluid is to be used again in the trans-

mission after the band adjustment, filter the

fluid through a 100-mesh screen as it drains

from the transmission. Reuse the fluid only if it is

in good condition.

(2) Remove the pan, then remove the fluid

filter and clip from the transmission. Clean the

inside of the pan. Remove all gasket material

from the pan and pan mounting face of the case.

Figure 7-3. Front Band Adjustment.

(3) Loosen the front servo adjusting screw

(4) Pull the adjusting screw end of the ac-

lockut two full turns with a 9/16 inch wrench.

tuating lever away from the servo body, and

Check the adjusting screw for free rotation in the

insert the inch spacer between the servo piston

actuating lever after the locknut is loosened, and

stem and the adjusting screw.

free the screw if necessary. See figure 7-3.

7-5