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TM 5-4210-233-14&P-1
5-42. REAR TANDEM AXLE AND DIFFERENTIAL-Continued
(39)
Adjust backlash of ring gear.
(a) Measure diameter of ring gear and note measurement to obtain approximate pitch diameter.
(b) Ring gears with a pitch diameter of less than 17 inches (431.8 mm).
Range of backlash setting - 0.008 to 0.018 inch (0.20 to 0.46 mm) (used gears).
Range of backlash setting - 0.012 inch (0.30 mm) (new gear sets).
Ring gears that have a pitch diameter of 17 inches (431.8 mm) or greater.
Range of backlash setting - .010 to .020 inch (.25 to .51 mm).
Backlash setting for new gear sets - .015 inch (.38 mm).
(c) If a used gear set is installed, adjust the backlash to the setting that was measured before the
carrier was disassembled (step b. (11) above).
(d) If a new gear set is installed adjust backlash to specification for new gear sets above.
(e) Attach a dial indicator 10 ring gear with pointer in contact with gear. Rotate ring gear and note
indicator reading. If backlash is within specifications, check tooth patterns. If not, adjust
backlash.
5-277
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