Introduction

The wheel unit parts prior to the addendum make:

one set of 3" shaft wheel units - for trucktor
one set of 1-7/8" shaft wheel units - for microtrac or bulldozer
One set of gear reduction units - for Bulldozer. Bulldozer uses 1-7/8" drive and 3" gear reduction.
2 idler wheels for Microtrac

Parts

Note: if Motor Interface Plate is not used in the above graphic, Part 5 must be replaced with a Direct Wheel Motor Mounting Plate for the 45.6 Cu In Hydraulic Motor.

92 parts total - Complete DXFs here - File:Hillparts.zip. Quantities of specific part below:

[4] Part 1 - File:Wheel Mounts Part 1.dxf - 6.26 bolt spacing, 11/16 holes. Also 6.0 bolt spacing and 5/8 holes need to be accounted for - so we have added File:UR 3inch universal.dxf
[6] Part 2 - File:Wheel Mounts Part 2.dxf
[4] Part 3 - File:Wheel Mounts Part 3.dxf. Modified for 6 an 6.26 inch spacing as above: File:3-mwu 3inch universal.dxf
[6] Part 4 - File:Wheel Mounts Part 4.dxf
[8] Part 5 - File:Wheel Mounts Part 5.dxf
[2] Part 6 - File:Wheel Mounts Part 6.dxf
[8] Part 7 - File:Wheel Mounts Part 7.dxf
[12] Part 8 - File:Wheel Mounts Part 8.dxf
[2] Part 9 - File:Wheel Mounts Part 9.dxf
[8] Part 10 - File:Wheel mounts Part 10.dxf
[8] Part 11 - File:Wheel Mounts Part 11.dxf

For geardown from here on, not shown above, see James_Log#Tue_Jun_18.2C_2013) -

Error creating thumbnail: File missing

-

Changes for incorrect hole position

File:Hillparts2.zip - parts 18-32. 100 parts more.

[4] Part 18 - Sprocket - File:45T325bore1by8cut.dxf -
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[8] Part 19 - Hub Plate - File:3hubplate.dxf -
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[4] Part 20 - Microtrac Hub - File:Wheel Hub for MicroTrac.dxf -
Error creating thumbnail: File missing
[4] Part 21 - Trucktor Motor Interface Plate - File:Trucktorinterface.dxf -
Error creating thumbnail: File missing

[8] Part 22 - Bobcat Standard Quick Attach Standard - File:Bobcatstandard.dxf -
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[7] Part 23 - Dozer Rib 1 - File:Drib1.dxf -
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[7] Part 24 - Dozer Rib 2 - File:Drib2.dxf -
[4] Part 25 - Pivot Holder 1 - File:Holder1.dxf -
Error creating thumbnail: File missing
[4] Part 26 - Pivot Holder 2 - File:Holder2.dxf -
Error creating thumbnail: File missing
[2] Part 27 - Pivot - File:Dpivot.dxf -
Error creating thumbnail: File missing
[4] Part 28 - Spacer - File:Pspacer.dxf -
Error creating thumbnail: File missing
[4] Part 29 - Ear - File:Pear.dxf -
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[8] Part 30 - Ironworker Blade Holder - File:Bladeholder.dxf -
Error creating thumbnail: File missing
[16] Part 31 - Small Bonding Plate - File:Stocksmallbond.dxf -
Error creating thumbnail: File missing
[16] Part 32 - Medium Bonding Plate - File:Stockmedbond.dxf -
Error creating thumbnail: File missing

(note: appears there are 4 too many of the 3" hole plates for geardown)