SECTION 3 - BASE COMPONENTS
31215825
3-17
Main Gear Box Sub-Assembly
Figure 3-17. Main Gear Box Sub-Assembly
1.
Inspect seal surface of Spindle Sub-Assembly. Remove
any debris or burrs that may be present.
2.
Apply a coating of grease to the Lip Seal (not shown) in
the Hub Sub-Assembly.
3.
Place Spindle (G1) Sub-Assembly on table with carrier
side up.
4.
Carefully install the Hub Subassembly (seal side down)
onto the Spindle Sub-Assembly. This installation should
be a slip fit and takes place in 3 stages.
Stage 1
: The hub slides together until the gear teeth of
the hub hit the gear teeth of the 3 Output Planet Gears
(G9).
Stage 2
: Find the Output Planet Gear (G9) that is tight
and turn it until you feel it go into mesh with the hub
gear teeth, apply slight downward pressure to the hub
and then find the next gear that is tight and do the
same.
Stage 3
: Once all the Output Planet Gears (G9) are in
mesh apply pressure to the hub, it should push on the
rest of the way.
5.
Install Retaining Ring (G27) into the groove on the OD of
the Spindle (G1) carrier. This is a Spiral Retaining Ring so
it will not require pliers. You will need to pull the Retain
-
ing Ring (G27) apart and work it into the groove.
6.
Using the appropriate pressing tool (T-174356), press in
the Input Ring Gear (G3) into the bore of Hub Subassem
-
bly.
NOTE:
Do not use excessive pressing force because it will be
reacted by the main wheel bearings.
7.
Install the Input Carrier Subassembly into mesh. The
Output Sun Gear (G8) portion of the Input Carrier Subas
-
sembly will mesh with the Output Planet Gears (G9) and
the Input Planet Gears (G5) mounted on the Input Car
-
rier Subassembly will mesh with the Input Ring Gear
(G3).
8.
Install the Input Sun Gear (G4) into the area between the
three Input Planet Gears (G5).
9.
Apply a coating of grease to the Cover O-ring (G20) and
install it into the o-ring groove of the Hub Subassembly.
NOTE:
It may be helpful to stretch the o-ring (G20) out prior to
assembly to avoid pinching or shearing when the Cover
(G11) is assembled.
10.
Apply adhesive Compound to Cover Thrust Washer
(G21) and place it in the center counterbore of the Cover
(G11) so that the steel face of the washer is out of the
bore.
NOTE:
Make sure that both the Cover Thrust Washer (G21) and
the Cover (G11) have good clean surfaces for the adhesive
Compound to properly adhere.
11.
Center the Cover (G11) in the hub bore so that the “JLG”
logo is up. Push it into the bore.
12.
Install the Cover Retaining Ring (G19) into the groove of
the Hub Sub-assembly.
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