JLG 740AJ, Service And Maintenance Manual

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SECTION 3 - CHASSIS & TURNTABLE
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3. Place O-ring (5) into Hub counterbore. Use petroleum
jelly to hold o-ring in place.
BEWARE OF SHARP EDGES OF THE COUNTERBORE WHILE SEATING THIS O-
RING.
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.
4. Thrust Spacer (9) is installed into the bore of the Output
Shaft (1A). This should be a slip fit and the 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
o’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.