FRONT & REAR SPRINGS.
FIRST.
WEEKLY-Tighten spring U-bolts,eye bolts,shackles...
SECOND.
MONTHLY & SIX-MONTH-Spring and bolts should be in place,spring leaves should not be shifted out of their correct position,note if the deflection of both springs is normal and approximately the same,test the bolts for excessive wear by means of a pry bar,make certain that no leaves are broken or shifted,examine springs for demage and sagging conditions,that spring clips are tight and that spring is in good condition,check spring U-bolts and spring seat clamp studs for tightness.
SIX-MONTH-Tighten all spring U-bolts securely and uniformly.