TM 9-2815-225-34&P 3-70.  CAM FOLLOWER ASSEMBLIES AND CAMSHAFT INSTALLATION (Contd) LOCATION/ITEM ACTION REMARKS Installation (Contd) 2. Camshaft (2) (Contd) (4)  Rotate camshaft gear (1) in Normal backlash is 0.004-0.016 in. opposite direction as far as it will (0.102-0.406 mm) between a new freely move.  The reading on camshaft gear (1) and a new indicator shows amount of crankshaft gear (9).  Minimum backlash between gears. backlash for a new camshaft gear is 0.002 in. (0.051 mm).  Gears will begin to make noise if backlash exceeds 0.010 in. (0.254 mm).  If noise is acceptable, do not replace gears unless backlash exceeds 0.020 in. (0.508 mm). NOTE Perform steps 3 and 4 to install any one of the three cam follower assemblies.  Repeat steps 3 and 4 as required to install each additional cam follower assembly. 3. New cam follower assembly Install on dowel pins and Use gasket or gaskets with same gasket (5) cylinder block (4). thickness as those removed (refer to para. 3-28).  Total gasket thick- ness must be between 0.014-0.080 in. (0.356-2.032 mm).  Install gas- ket (P/N 3020000) (M915A1/ Big Cam III) so that it is against cylinder block (4) and sealing bead faces cam follower assembly (6). 4. Cam follower assembly (6) a.  Install on cylinder block (4). Strike housing with soft-nose hammer to push it onto dowel pins on cylinder block (4). b.  Secure with six screws (7).  Six Tighten to 15 lb-ft (20 Nm) in lockwashers (8) are also used on tightening sequence (10) shown in M915/Big Cam I engines. illustration, then tighten to 30-35 lb-ft (41-48 Nm). FOLLOW-ON TASK:  Install cylinder head assembly and pushrods (para. 3-71). 3-560