TM 9-2320-363-34-2
ADJUSTABLE IDLER GEAR REPLACEMENT (CONT)
7.
8.
9.
10.
11.
12.
TURN ADJUSTING SCREW (9) CLOCKWISE TO MOVE ADJUSTABLE IDLER GEAR TOWARD
CAMSHAFT DRIVE GEAR (6) UNTIL THERE IS ZERO LASH.
INSERT SCREWDRIVER THRU ACCESS BOLT HOLE (10) AND ENGAGE ADJUSTABLE IDLER
GEAR TOOTH (11) TO DETERMINE GEAR LASH.
APPLY PRESSURE ON SCREWDRIVER TO HOLD ADJUSTABLE IDLER GEAR IN
COUNTERCLOCKWISE DIRECTION AND ATTEMPT TO MOVE CAMSHAFT DRIVE GEAR (6) BY
. ,
HAND.
Gear
lash.
met.
WHEN
WATCH DIAL INDICATOR POINTER. IF THERE IS ZERO LASH, POINTER WILL NOT MOVE.
NOTE
lash reading obtained on cam/idler lash pedestal is one-half actual gear
Reading on dial indicator must be doubled to determine if specification is
ZERO LASH IS OBTAINED, TURN ADJUSTING SCREW (9) APPROXIMATELY 1-1/2 TURNS
COUNTERCLOCKWISE OR UNTIL CORRECT GEAR LASH IS OBTAINED.
BAR ENGINE TO CHECK ADJUSTABLE IDLER GEAR LASH ON CAMSHAFT DRIVE GEAR (6) AT
3, 6, 9, AND 12 O’CLOCK POSITIONS.
WHEN GEAR LASH IS 0.002-0.007 IN. (0.051-0.178 mm) AT ALL FOUR POSITIONS, TiGHTEN TWO
TOP NUTS (1) TO 42-49 LB-FT (57-67 N.m).
12-104
