ARMY TM 9-2815-260-24 AIR FORCE TO 38G1-126-2 MARINE CORPS TM 09244A/09245A-24 5-54 Table 5-4.  Camshaft and Timing Gear Train Specifications - CONT. Item Specification Oil Clearance: Upper Idler Gear Bushing-to-Shaft 0.0030 - 0.0049 in. (0.075 - 0.125 mm) Lower Idler Gear Bushing-to-Shaft 0.0010 - 0.0040 in. (0.026 - 0.102 mm) Timing Gear Backlash: Upper Idler Gear-to-Camshaft Gear 0.0030 - 0.0162 in. (0.077 - 0.412 mm) Upper Idler Gear-to-Injection Pump Gear 0.0030 - 0.0162 in. (0.077 - 0.412 mm) Upper Idler Gear-to-Crankshaft Gear 0.0025 - 0.0127 in. (0.065 - 0.322 mm) Lower Idler Gear-to-Crankshaft Gear 0.0026 - 0.0132 in. (0.067 - 0.336 mm) Lower Idler Gear-to-Oil Pump Gear 0.0032 - 0.0135 in. (0.081 - 0.342 mm) b.   Removal. (1) Remove timing gear cover, refer to paragraph 4.9.3 (2) Remove oil pan, refer to paragraph 4.5.3. (3) Remove bolt (1, Figure 5-63) and thrust washer (2) securing upper idler gear (3) to shaft (5); remove idler gear (3). (4) Remove nut (8), washer (9), and thrust washer (10) securing lower idler gear (11); remove idler gear (11). (5) If necessary, use an arbor press and remove bushings (4 and 12) from gears (3 and 11). (6) Remove bolt (13) and washer (14) from lower idler gear shaft (15). (7) Remove lower idler gear shaft (15) from front plate using a pry bar.  Remove thrust washer (17). (8) Remove upper idler gear shaft (5) from front plate using a pry bar.  Remove thrust washer (7). (9) Remove spring pins (6 and 16) from shafts.