JLG 680S Service Manual - Manual (Page 79)

SECTION 3 - CHASSIS & TURNTABLE
3121234 – JLG Lift – 3-31
14. Place o-ring (22) into hub counter bore. Use petro-
leum or grease to hold o-ring in place. Slight stretch-
ing of o-ring may be necessary to insure proper
seating.
15. Place carrier assembly on a flat surface with large
gears up and positioned as shown. Find punch
marked tooth on each large gear and locate at 12
o’clock (straight up) from each planet pin. Marked
tooth will be located just under carrier on upper two
gears.
16. With shoulder side of ring gear (21) facing down,
place ring gear over (into mesh with) large gears.
Ensure punch marks remain in correct location dur-
ing ring gear installation.
17. While holding ring gear, input gear, and cluster
gears in mesh, place small side of cluster gears into
mesh with internal gear. On ring gear, locate hole
marked ‘X’ over one of counter bored holes in hub.
NOTE: If gears do not mesh easily or carrier assembly does
not rotate freely, then remove carrier and ring gear
and check cluster gear timing.
18. Install input gear (37) into carrier, meshing with large
diameter cluster gears (18). Counter bore in bore of
input gear must be to outside of carrier assembly.
19. After inserting at least one shoulder bolt in the
proper location, rotate the carrier. Check freedom of
rotation and timing.
20. Install thrust washers and thrust bearing (39, 40) into
carrier counter bore.