Tread Width; Tire Selection; Feeder Adjustment For Tire Size; Tire Inflation - Hillco JH7020 Operator's Manual

Tread Width

The Model JH7020 & JH9020 Leveling Systems are designed around a main undercarriage length of
122.5". With the final drives mounted directly to the 122.5" undercarriage, the tread spacing is 128"-
188" which allows for the maximum leveling capability of the combine or 27%.

Tire Selection

Model JH7020 & JH9020 Drive & Steer Tire Assemblies – Combines equipped with the Model
JH7020 or JH9020 Leveling System are required to use tires and wheels that meet or exceed
Tire & Rim Association standards for Hillside Combine applications. Contact Hillco for more
information.

Feeder Adjustment For Tire Size

Adjust the feeder adapter to obtain the proper header angle and cutter bar height as shown in the John
Deere® STS Operator's Manual. The chart shown in those manuals will no longer be a correct guide to
adjust the feeder adapter due to the height increase created by the leveling system.

Tire Inflation

Drive (650/75R32) R1 & R3 Tread
Drive (650/65R38) 550 Tread
Steer (28LR-26) R1 & R3 Tread
Steer (28LR-26) 390 Tread
For all other steer tires see the combine's operator's manual for correct pressure
The Calibration number for the 550 tires is 8450777
All Hillside combines are required to follow the Wheel and Tire Association Standards which states
that the tire pressure must be such that the tire has adequate load carrying capability for the maximum
possible weight (counting head weight and full grain tank). Both under-inflation and over-inflation are
detrimental to tire life. Don't reinflate a tire that has been run flat or when there is obvious or suspected
damage to the tire or wheel components. Check the tire pressure weekly or after 50 hours of operation.
WARNING
WARNING
D-180215CMA01C
Tire
When inflating tires, use a clip on air chuck and extension hose long
enough to allow you to stand to one side and NOT in front or over the
tire assembly. Use a safety cage if available.
A tire can explode during inflation and cause serious injury or death.
Never increase air pressure beyond 35 PSI to seat the bead on the rim.
Replace a tire if it has a defect. Replace a wheel rim, which has cracks,
wear or severe rust. Make sure that all the air is removed from a tire
before removing the tire from the rim. Never use force on an inflated
or partially inflated tire. Make sure the tire is correctly seated before
Hillco Technologies, Inc.
50
Load Index
175A8
175A8
173A8
178A8
inflating.
PSI
46
46
36
36
Sept. 2022