JLG 680S, Service And Maintenance Manual

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SECTION 3 - CHASSIS & TURNTABLE
3121234 3-81
3. Place o-ring (5) into hub counterbore. Use petroleum
jelly to hold o-ring in place. Also at this time locate and
mark the 4 counter beamed holes in the face of the hub
(1G). This is for identification later in the assembly.
BEWARE OF SHARP EDGES OF THE COUNTERBORE WHILE SEATING THIS
O-RING.
4. Thrust spacer (9) is installed into the bore of the output
shaft (1A). This should be a slip fit and thrust spaces
should rotate in this location.
5. Place carrier assembly (3) on a flat surface with the large
gears (3F) up and positioned as shown. Find the punch
marked tooth on each large gear (3F) and locate at 12
0’clock (straight-up) from each planet pin. Marked tooth
will be located just under the carrier (3A) on upper two
gears (3F).
6. With shoulder side of ring gear (4) facing down, place
ring gear over (into mesh with) large gears. Be sure that
punch marks remain in correct location during ring gear
installation. The side of the ring gear with an X stamped
on it should be up.
7. While holding ring gear (4) and cluster gears (3F) in
mesh, place small side of cluster gears (3F) into mesh
with the internal gear (2) and input gear (13). On the
ring gear locate the hole marked “x” over one of the
marked counterbore holes (step 3) in hub (1G).
NOTE: If gears do not mesh easily or carrier assembly does not
rotate freely, then remove the carrier and ring gear and
check the cluster gear timing.