Table 4-2. Unit Troubleshooting Procedures (Con't).
TEST OR INSPECTION
If spring is flattened or weak, replace springs on each end of axle (see
Check to see if U-bolts are loose and springs are out of alinement in frame hangers
Loosen U-bolt nuts. Tap on springs to aline in frame hangers. Torque U-bolt
15. SEMITRAILER PULLS HARD, DRAGS, OR RESISTS ROLL
Inspect spring to see if center bolt is broken or sheared and spring is out of alinement
in frame hanger. Inspect spring leaves for breaks or cracks (see paragraph 4-56).
If any damage is found, replace springs on each end of axle (see para-
Torque U-bolt nuts in a diagonal sequence to 360 lb.-ft. (488 Nm) (see
If axle is bent, notify direct support maintenance to replace axle.
16. DIFFICULT OPERATION
Check for proper lubrication (see Chapter 3, Section I).
Lubricate according to instructions in Chapter 3, Section I.