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.
A 16-leaf heavy duty truck rear spring AA-5558-G has been released for use in the Model 205-A coal body (see Fig. 1179). This spring is serviced less the spring clip and the pivot seat assembly and will be listed in the parts book under AA-5560-G.
Fig. 1180 shows the new AA-5558-F 4811 long spring used under the school bus. This spring can also be used under trucks equipped with 16-leaf springs when the customer prefers more spring resiliency. It should, however, be explained to the customer that, in replacing a 16-leaf spring with the 48″ long spring, the truck must …
There is considerable difference in the horizontal length of a truck spring when the truck is loaded and unloaded. When not under load, the spring is in its original curved position. When heavily loaded, the spring has a tendency to straighten out. (See Fig. 1177.) To compensate for the difference in length when the spring …
To prevent any possibility of truck rear spring clips AA-5705-C, AA-5705-0 and AA-5705-E stretching in service, we have changed the type of steel and increased the tensile strength of these parts. In addition both the spring clips and the spring clip nuts have been increased in length, see Figs. 1126 and 1127. These improvements give …
An improvement has recently been made in the front and rear spring hangers A-5465 and A-5715. An additional oil groove has been placed in the shank directly opposite the present groove . Also the 5/32“ drilled hole which connects the lubricator fitting with the oil groove is now drilled through instead of one side only. …
To lessen any possibility of lubricant work- ing out through the bolt hole in the rear spring pivot seat AA-5788-D, the pivot seat bushing is now made in one piece instead of two (see Fig. 1131).
For the purpose of lowering the loading height of trucks equipped with AA-5560-B 16-leaf rear spring assembly, longer rear spring shackles, AA-5776-BR right hand and AA-5777-BR left hand, have been released for service. (See Fig. 1142) These shackles lower the loading height of the truck 1 1/2” at the center line of the rear axle. …
To provide additional clearance between the brake housing plate and the rear spring clamps on the truck, the rear spring clamps have been moved from number 8 leaf to number 9 leaf on the AA-5560-B and AA-5560-C rear spring assemblies. This change moves the spring clamp 3⁄4″ further in from the end of the spring …
In the delivery of certain types of fragile materials such as baked goods, pastries, custards, etc., the standard rear springs used under the 1311⁄2″ chassis may be too stiff to satisfactorily transport such products. In such cases the standard springs can be easily replaced with AA-5560-E rear springs. These springs are used as regular equipment …
Spring breakage can usually be traced to one or more of the following conditions: Loose spring clips-spring clip nuts must be kept tight.This also applies to the spring clamps. Dry springs-frozen shackles-caused by lack of lubrication. Overloading-mechanics installing wrong type of springs underneath jobs. So that everyone will clearly understand the correct type of springs …
It is very important that truck owners be instructed to keep spring clip nuts tight at all times. (See Fig. 1091.) If these nuts are permitted to work loose, it allows the spring leaves to shift when- ever the spring flexes as when traveling over rough roads, etc. This excessive movement of the leaves gradually …
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