TM 9-2330-379-14&PSection VIII SERVICEABILITY STANCDARUDS AND WEAR LIMITSGENERALThe following table lists the points of measurement of critically dimensioned parts together with the limiting dimensions fornew or rebuilt parts and the extent of wear that can be tolerated. Wear limits for mating parts are given as the totalcombined limit of wear of both parts. Both mating parts should be replaced unless the extent of wear of one part is lessthan 25 percent of the combined wear, in which case only the most worn part need be replaced.POINTS OF MEASUREMENTThe points at which critical dimensions require measurement are illustrated in the accompanying figure.SIZE OR FITFIELD WEARITEMPOINT OF MEASUREMENTOF NEW PARTSLIMITS1Outside diameter of kingpin1.792/1.7931.787/1.788(.005 in. max)2Inside diameter steering1.5040/1.50700.015 max combinedlink and tow bar bushingswith (3)3Outside diameter steering1.4985/1.5000.015 max combinedlink and tow bar pinwith (2)4Minimum thickness brake.5 in thk (upper.125 in. min thkliningnon-riveted surface)(upper non-rivetedsurface)5Maximum inside diameter14.995/15.00515.120 max turnbrake drumdown dia.6Outside diameter front and1.540/1.49850.015 max combinedrear dolly upper and lowerwith (7)arm pins at adaptor7Inside diameter front and1.5040/1.50700.015 max combinedrear dolly upper and lowerwith (6)arm bushings at adaptor pins5-32
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