Section 2  - Frame

Fig. 5- 1-1/2-Ton Conventional 160" Wheelbase Frame
3/4-TON LONG W.B. PANEL AND 134-1/2" W.B. 1-1/2-TON TRUCKS
When checking a frame for misalignment in case of damage, the most efficient method is "X" checking with a tram from given points on each side rail.
In the Figures 1. 2, 3, 4 and 5, reference points are indicated—"A," "B," "C" and "D" on each
frame side member.
When making checks on all conventionally sprung models, the tram points should be set at the renter of the lubrication fittings. When check­ing the front section of independent suspension models, the check should be made from the center of the front bumper bracket bolt to the center of the body bolt at the front body mounting bracket, shown by lines "AB" in Figs. 1 and 2.
When "X" checking any section of the frame, the measurements should agree within 5/16". If the measurements do not agree within the above limit, it means that corrections will have to be made between those measurement points that are not equal.
The minimum dimensions between the spring hangers, both front and rear, are also shown on the illustrations. In addition the height of the front spring horns with reference to the top of the frame side member is shown on the truck model illustrations.
The 3/4-ton long Wheelbase panel and 134-1/2" Wheelbase 1-1/2-ton truck frames are identical with exception to a slight difference in the brake cross shaft bracket. Each frame has five cross members.
1-1/2-TON 160" AND 195-1/8" W.B. AND C.O.E. TRUCKS
Five cross member frames are used on the and 132-5/8" Wheelbase 1-1/2-ton C.O.E. trucks; six cross member frames on the 160" Wheelbase con­ventional and 158-1/8" Wheelbase 1-1/2-ton C.O.E. trucks. The 195-1/8" Wheelbase l-1/2-ton conventional school bus frame has eight cross members.
All Cab-Over-Engine 1-1/2-ton truck frames in­clude a sub-frame at the front end to provide proper clearance for the cab mounted over the engine.
In the case of a collision or accident where the bending or twisting of the frame is not excessive, it is permissible to straighten the frame. This must be done cold, as heat applied to the frame will change the structure of the metal and weaken the frame at the point where heat is applied.





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