STEERING-HYDROGEAR
59
Rebuilding the steering gear box
There are two different gear boxes available for the
I-series tractors that are equipped with HydroGear
transmissions.
• The 618-04430 steering gear box was used until
the end of the 2007 model year.
• The 618-04634 steering gear box was used in
2008 through current production.
The procedures to rebuild both gear boxes are sim-
ilar. Where there are differences, they will be called out
in the text.
To take the steering gear box apart:
1. Remove the steering gear box by following the
procedures described in the previous section of
this chapter.
2. Identify the gearbox assembly using the serial
number tag located on the return to neutral
bracket. See Figure 6A.30.
Figure 6A.30
Model number
3. Remove the return to neutral bracket using a
3/8” wrench. See Figure 6A.31.
4. Remove the six remaining case screws using a
3/8” wrench. See Figure 6A.32.
Figure 6A.31
Remove these
screws
Figure 6A.32
Remove
these
screws
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