TM 10-3930-653-14&P (6) Measure  the  free  length  and  setting  load  of  the shoe return spring. Free length: 115.1 mm (4.53 in) Setting length: 122 mm (4.80 in) Setting load: 23 + 2.3 kg (50.7 + 5.1 lbs) (7) Measure  the  free  length  and  setting  load  of  the shoe-to-shoe spring. Free length: 104.5 mm (4.11 in) Setting length: 122 mm (4.80 in) Setting load: 8 + 0.8 kg (17.6 + 1.76 lbs) (8) Measure  the  free  length  and  setting  load  of  the adjuster spring. Setting load: 1.5 kg (3.3 lbs) Fig.  4-458. Fig.  4-459. Fig.  4-460. (9) Check the adjuster gear for damage and operating condition, and also check to see if it is in proper mesh with the pole lever gear.  If any defect is found, replace. 4-231