TAKING PRESSURES

TRANSMISSION

Oil flows from the case through a filter to the adapter

plate for the pump inlet. Always prime the filter (fill it

with transmission oil) before operating the transmission.

Also prime the torque converter charging pump by

pouring 1/2 pint of transmission oil into Port 1.

B. TAKING PRESSURES

1. Attach pressure gauges to the torque converter

housing and the tachometer to the engine.

See

PRESSURE CHECK CHART for gauge range. (Fig.

46)

2. Check the oil level with the transmission in

neutral and the engine at idle speed.

3. To check whether oil is flowing through the

torque converter unit, disconnect the oil cooler return

Figure 45.

hose from the nipple in the front bearing cap, hold the

hose in the transmission fill pipe and operate the engine.

2. With master cylinder piston in fully retracted

A steady flow of oil should come from the hose.

position, adjust the cylinder push rod so that it just

contacts piston with brake pedal up.

4. Allow

the

engine

reach

operating

temperature.

3. With pedals up against the stop, shorten or

lengthen the adjustable link until the actuating crank

5. Allow the transmission oil to reach operating

clears the inching spool by .015 to .032 when the

temperature (100- 200 .).

inching spool is pushed in against its stop.

6. Recheck the transmission oil level in neutral at

NOTE:

engine idle speed.

Jam nuts on the adjustable link must

be tight when the clearance is

checked.

7. Adjust inching controls.

4. Adjust the relay screw and its jam nut so that a

8. Block the truck up so the transmission can be

90 to 100 pound force on the inching pedal will fully

put in gear.

extend the inching spool.

9. Proceed with pressure checks as outlined in the

5. Check the adjustment after the truck has been

PRESSURE CHECK CHART.

run and brakes applied several times in each direction.

WARNING:

PRESSURE CHECKS

Do not remove check port plugs 1, 2,

A. GENERAL

or 3, or regulator plugs I, II and III

while the engine is running.

Figure 46.

B-111