1931

TWO DESIGNS OF TRUCK REAR HUBS

Truck rear hubs AA-1113-F2 and AA 1114-F2 are now being used in 100% production. In these hubs the bearing sleeve is made integral with the hub. This construction eliminates the AA-1236-C rear hub sleeve and the A-23225 sleeve retainer rivet. The AA-1113-F2 and AA-1114-F2 hubs can be used interchangeably with the AA-1113-Fl and AA-1114-Fl hubs …

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TOP DRESSING

Top dressing should never be applied when a top is new, it should be applied only after the top material has become very dull, checked or cracked. It is also important that the correct top dressing is used with rubber and pyroxylin coated tops. Use M-255 for Pyroxylin coated tops only, Use M-255-B for Rubber …

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A-46116-R LOCK CYLINDER OBSOLETED

A-46116-R lock cylinder and key assembly has been obsoleted. If calls are received for this part after present stocks are exhausted, supply A-46123-E lock cylinder and A-11586-C key. The key can be cut on your key cutting machine and the tumblers in the lock cylinder then fitted to the key.

CORRECTION (July 1931)

Please refer to Fig. 1192 in the June Service Bulletin and change the width of the slot shown in A-11357-BR starter drive service sleeve, from 3⁄4″ to 1⁄2″.

SUPPORT SPRING STRENGTHENED

To still further increase the strength of the A-6031 engine front support auxiliary spring, a flange has been added around the hole for the engine support stud and a bead added next to the hole. (See Fig. 1224.) This type of construction materially increases the strength of this part.

Oil Grooves in Main Bearings

After rebabbitting a cylinder block be sure to form oil grooves in the main bearings. (See Fig. 1226.) K. R. Wilson furnishes a tool for this purpose.

INSTALLING LOCK WASHERS

Fig. 1196 shows how the lip of the lock washer on the starter drive spring screw should be bent to hold the screw tightly in place. The lip of the washer must be bent upward until it presses tightly against a flat side of the screw head. New washers should be used every time a …

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RETARD SPARK LEVER WHEN STARTING

In addition to using the correct parts with each drive, caution owners on the importance of retarding the spark lever when starting so as to avoid the possibility of a back kick occurring. If the first attempt does not result in the engine starting wait and make certain that the engine and starting motor have …

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