JLG M4069 ANSI Service Manual - Manual (Page 94)

SECTION 4 - HYDRAULICS
4-22 – JLG Lift – 3121122
Assembly
1. With the hub shaft sub-assembly resting on the shaft
install internal gear. The spline of the internal gear.
bore will mesh with the spline of the output shaft.
2. Thrust washer is installed on the face of the output
shaft. Sufficient grease or petroleum jelly should be
used to hold thrust washer in place.
3. Place o-ring into hub counterbore. Use petroleum
jelly to hold in place. Locate and mark the four coun-
ter beamed holes in the face of the housing. This is
for identification later in the assembly.
4. Thrust spacer is installed into the bore of the output
shaft. This should be a slip fit and the thrust spacer
should rotate in this location.
5. Place carrier assembly on a flat surface with the gear
cluster up. Find the punch marked tooth on each
large gear and locate at 12 o’clock (straight up) from
each planet pin.
6. With shoulder side of ring gear facing down, place
ring gear over (into mesh with) cluster gear. Be sure
that punch marks remain in correct location during
installation. The side of the ring gear with an “X”
stamped on it should be up.
7. While holding ring gear and cluster gear in mesh,
place small side of cluster gear into mesh with the
internal gear and sun gear. On the ring gear, locate
the hole marked “X” over one of the marked coun-
terbored holes in hub.
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.
8. Sun gear is installed, meshing with the teeth of the
large diameter cluster gear. The counterbore on the
sun gear locates on the shoulder of the input spacer.
This is to be a slip fit and should operate freely.
9. Thrust washer is installed onto the sun gear and
should locate on the gear teeth shoulder.
10. Thrust washer is installed into the counterbore of the
carrier.
11. Place o-ring into input cover counterbore. Use petro-
leum jelly to hold o-ring in place.
12. The input cover is now installed on this assembly.
Taking care to correctly align pipe plug hole with
those in the hub, usually 90° to one another, locate
the four counterbore holes in housing, marked in
step (3) and install four shoulder bolts. A tap with a
hammer may be necessary to align shoulder bolt
with hub counterbore.
13. Install bolts into remaining holes.
14. Pipe plugs are to be installed into input cover using
a lubricant seal.
15. Torque bolts to 23 - 27 ft lbs (31- 36 NM).
16. Fill unit one-half full with EP90 lubricant.