JLG 660SJ Service Manual - Manual (Page 62)

SECTION 3 - CHASSIS & TURNTABLE
3-12 – JLG Lift – 3121202
Input Carrier Sub-Assembly
1. Apply a liberal coat of grease to the bore of one
Input Planet Gear (3F).
2. Line the inside of the Planet Gear (3F) with 14 Nee-
dle Rollers (3C).
NOTE: The last roller installed must be installed end wise.
That is, the end of the last roller must be placed in
between the ends of the two rollers which form the
space, and then slid, parallel to the other rollers, into
place.
3. Set Carrier (3A) in an upright position.
4. Insert a Planet Shaft (3E) into the planet shaft hole in
the end of the Carrier (3A) opposite the splined end.
The end of the planet shaft that does NOT have the
roll pin hole should be inserted into the carrier
FIRST.
5. Place one Thrust Washer (3B) onto the end of Planet
Shaft (3E). Make sure the flat faces towards the
inside of the carrier and make sure the button fits in
the pocket on the inside of the Carrier (3A) towards
the OD.
6. Following the thrust washer, place Planet Gear (3F)
with needle rollers, onto Planet Shaft (3E).
7. Following the planet gear, place one more Thrust
Washer (3B) onto Planet Shaft (3E). Align the Thrust
Washer (3B) in the same manner described in Step
5.
8. Now insert Planet Shaft (3E) through the opposite
planet shaft hole on Carrier (3A). Use an alignment
punch or similar tool to align the roll pin holes on
Carrier (3A) and Planet Shaft (3E).
NOTE: Be sure not to hit the Planet Gears (3F) when driving
in the Roll Pins (4G).
9. Drive Roll Pin (4G) down into the aligned roll pin
holes. Pin should be flush with the flat of carrier.
10. Repeat Steps 1-9 for the installation of the two
remaining Planet Gears (3F).
NOTE: Some grease may need to be applied to the Thrust
Washers (3B) to hold them in place while installing
the planet gears.
Output Planet Gear Sub-Assembly
1. Apply a liberal coat of grease to the bore of one Out-
put Planet Gear (4F).
2. Line the inside of the Planet Gear (4F) with 14 Nee-
dle Rollers (4C).
NOTE: The last roller installed must be installed end wise.
That is, the end of the last roller must be placed in
between the ends of the two rollers which form the
space, and then slid, parallel to the other rollers, into
place.
3. Place Spacer (4D) into the bore of the Output Planet
(4F).
4. Repeat Step 2 to put in second roll of Needle Rollers
(4C).
5. Apply grease to hold two Thrust Washers (4B)
together and onto Output Planet Gear (4F) counter-
bore. Do the same to the other side.
6. Repeat Steps 1-5 to finish the assembly of the two
remaining Output Planet Gears (4F).
Spindle - Brake Sub-Assembly
1. Place Spindle (1A) such that the flange side is up.
2. Place Stator (8K) into the Spindle (1A) scallop cuts.
3. Place Rotor (8J) on top of Stator (8K).
4. Repeat steps 2 & 3 until there are a total of 9 Stators
(8K) and 8 Rotors (8J) installed.
5. Place Piston (8A) such that the smaller O.D. end is
facing upward. Grease the two O-Rings and the two
Backup Rings.
6. Install large Backup Ring (8E) in the large-diameter
groove at the bottom of the Piston (8A).
7. Install large O-Ring (8D) in the large-diameter
groove at the bottom of the Piston (8A), on top of the
large Backup Ring (8E).
8. Install small O-Ring (8F) in the small-diameter
groove near the top of the Piston (8A). Make sure
the O-Ring is seated on the bottom of the groove.