What engine does the series cooling circuit in Fig. 10 apply to?

The transmission series cooling circuit shown in Figure 10 is used with 390 C.I.D. engines.

What pressure does the cooler return check valve maintain in the converter out circuit?

A spring-loaded check valve maintains about 3-5 psi in the converter out circuit. When pressure exceeds 3-5 psi, the check ball opens and cooled oil is directed to lubricate the transmission gear train.

What regulates control pressure in this automatic transmission?

Control pressure is regulated by the spring-loaded control pressure regulator valve, adjusted to engine torque, road speed, and selector lever position via compensator pressure.

What is the first step of the throttle and downshift linkage adjustment?

Apply the parking brake and place the selector lever at N, then run the engine at normal idle speed (fast idle about 1200 rpm if cold, until it reaches operating temperature).

Where should the carburetor throttle lever be during idle speed adjustment?

It must be against the idle adjusting screw at the specified idle speed in D1 (large dot) or D2 (small dot).

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1964 Mercury 390 Automatic Transmission Cooling Circuit & Linkage Adjustment

Ford automatic transmission series cooling pressure regulator circuit, 390 CID engine

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Ford manual page 7-62 with Fig 10 series cooling pressure regulator circuit (390 CID): control pressure, converter pressure and compensator pressure valves; oil cooling/lubrication flow.

AI caption April 2014 · Photo 64 of 242

This is a page (7-62) from a factory service manual, Group 7 – Automatic Transmission, covering hydraulic pressure regulation and in-car adjustments. The text explains how control pressure is regulated by the spring-loaded control pressure regulator valve, adjusted for engine torque, road speed, and selector lever position via compensator pressure; how converter pressure is regulated by the converter pressure regulator valve spring; and how the oil cooling and lubricating system works. Figure 10 (drawing D1316-A) is a schematic of the series cooling pressure regulator circuit used with 390 C.I.D. engines, showing converter in/out passages, front pump, front pump check valve, control pressure regulator valve, converter pressure regulator valve, cooler return check valve, screen, oil cooler, and lubricating oil paths. A spring-loaded check valve maintains about 3-5 psi in the converter out circuit; above that pressure, cooled oil lubricates the gear train. Section 2, 'In-Car Adjustments and Repairs,' begins the throttle and downshift linkage adjustment procedure: apply parking brake, warm engine (fast idle about 1200 rpm), connect a tachometer, set idle in D1 (large dot) or D2 (small dot), check dashpot plunger clearance and fast idle cam position, adjust the anti-stall dashpot per Group 8 specs, and disconnect the carburetor connecting link from the accelerator bellcrank.

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Frequently asked questions

What engine does the series cooling circuit in Fig. 10 apply to?: The transmission series cooling circuit shown in Figure 10 is used with 390 C.I.D. engines.
What pressure does the cooler return check valve maintain in the converter out circuit?: A spring-loaded check valve maintains about 3-5 psi in the converter out circuit. When pressure exceeds 3-5 psi, the check ball opens and cooled oil is directed to lubricate the transmission gear train.
What regulates control pressure in this automatic transmission?: Control pressure is regulated by the spring-loaded control pressure regulator valve, adjusted to engine torque, road speed, and selector lever position via compensator pressure.
What is the first step of the throttle and downshift linkage adjustment?: Apply the parking brake and place the selector lever at N, then run the engine at normal idle speed (fast idle about 1200 rpm if cold, until it reaches operating temperature).
Where should the carburetor throttle lever be during idle speed adjustment?: It must be against the idle adjusting screw at the specified idle speed in D1 (large dot) or D2 (small dot).