ARMY TM 9-2815-259-24
AIR FORCE TO 38G1-125-2
MARINE CORPS 09249A/09246A-24
Make sure oil hole in bushing (16, Figure 5-61) is aligned with oil passage in
block for proper bushing and journal lubrication.
If removed, use balancer shaft bushing driver (JD249) to drive new bushings (16, Figure 5-61) into
Adequate bushing-to-balancer shaft clearance exists, if shaft can be rotated
by hand with a slight-to-moderate drag. It is not necessary to hone bushing
to obtain specified oil clearance. Excessive clearance can result in shaft
If gear (11 or 12) was removed, install as follows:
Install key (15) in slot on shaft.
Position balancer shaft (13 or 14) in balancer shaft holding tool.
Install thrust plate (9 or 10) and gear (11 and 12) on balancer shaft. Be sure timing mark on
gear faces away from balancer shaft.
Press gear onto shaft with a tube-type driver and arbor press. Press gear until a clearance of
0.002 to 0.008 inch (0.005 and 0.20 mm) exists between thrust plate and gear/shoulder.
Make sure engine is at TDC (refer to paragraph 4.7.2) (No. 1 piston on compression stroke), with
timing pin engage in flywheel.
Apply a liberal amount of clean engine lubricating oil, MIL-L-2104, to bushings (16) in engine
block and to balancer shaft (13 and 14) journals.
Do not intermix shafts (13 and 14) or gears (11 and 12) in location from
which they were removed. Shafts are lapped for one direction of rotation,
and exchanging locations could cause premature wear of shafts and
bushings. If doubt exists as to which shaft is left- or right-hand, always
replace the balancer shaft bushings (16).
Install balancer shafts (13 and 14) and thrust plates (9 and 10).
Secure each thrust plate (9 and 10) with two capscrews (7) and new lockwashers (8). Tighten
capscrews to 26 lb-ft (35 Nm).