Figure 7-4. Rear Band Adjustment.

TM 10-3930-633-34

(5) Install the socket handle on the 9/16 inch

screw and tighten until the wrench clicks and

socket.

breaks.

(6) Insert the T-handle extension through the

(5) Back off the adjusting screw 1- turns.

s o c k e t handle and socket, and install the

Hold the adjusting screw stationary and tighten

screwdriver socket on the T-handle extension.

the adjusting screw locknut to specification.

Severe damage may result if the adjusting screw

(7) Place the tool on the adjusting screw so

that the screwdriver socket engages the screw and

is not backed off exactly 1 turns.

the 9/16 inch socket engages the locknut.

7-6. Stall Test

(8) With a torque wrench on the T-handle

a. Start the engine to allow it to reach its

extension, tighten the adjusting screw to 10

normal temperature. Apply both the parking and

in./lbs torque.

service brakes while making tests.

(9) Remove the spacer and tighten the ad-

b. The stall test is made in D, or R, at full

justing screw an additional turn. Hold the

throttle to check engine performance, converter

adjusting screw stationary, and torque the

clutch operation or installation, and the holiday

locknut to specification.

ability of the forward clutch, reverse-high clutch

(10) Place a new gasket on the pan, and

and low-reverse band and the gear train one-way

install the screen and pan on the transmission.

clutch. While making this test, do not hold the

(11) Fill the transmission with fluid. See LO

throttle open for more than five seconds at a time.

10-3930-633-12.

Then move the selector lever to Neutral and run

b. Rear Band Adjustment.

engine at 1000 RPM for about 15 seconds to cool

(1) Remove all dirt from adjusting screw and

the converter before making the next test. If the

surrounding area. See figure 7-4.

engine speed recorded by the tachometer exceeds

the maximum limits, 1300 to 1500 RPM, release

the accelerator immediately because clutch or

band slippage is indicated.

7-7. Control Pressure Checks

a. When performing control pressure checks,

make certain that the engine is at normal

operating temperature and that timing and

carburetor are properly adjusted. Set parking

brake firmly to prevent vehicle motion. Check

manifold vacuum (see Chapter 6) to make certain

a reading of 18 inches (Hg) is obtained at engine

idle. At higher altitudes, it may not be possible to

obtain 18 inches of vacuum; under these con-

ditions, use the chart in the lower part of table 7-2

to adjust pressure readings in proportion to the

lower vacuum readings. Make certain, however,

Figure 7-4. Rear Band Adjustment.

that the lower vacuum reading is not due to a leak

(2) Loosen the adjusting screw locknut with a

in the transmission or distributor vacuum line.

box end wrench as shown in the illustration.

b. With vacuum readings and engine ad-

(3) Using a torque wrench, tighten the ad-

justments verified, connect a pressure gage of O-

justing screw to 10 ft/lbs. Try to get the ad-

250 PSI range to the control pressure port shown

justment as close to exactly 10 ft/lbs as possible.

in figure 7-5, and proceed with test as follows:

(4) If the screw is found to be tighter than

wrench capacity (10 ft/lbs torque), loosen the

7-6