Shibaura ST460, Operator'S Manual

Page: 54 / 126

SECTION 2 – OPERATION
2-29
DRATFT CONTROL
When operating in draft control, the draft control
lever
② used to adjust sensitivity to draft loads.
Once the lever is positioned, the hydraulic lift
system will automatically adjust the depth of the
equipment to maintain an even load on the
tractor as soil conditions vary. The hydraulic
system senses draft changes through changes in
upper link compression. The operation of the
upper link draft sensing system is described in
the following paragraph.
Upper Link Compression Loads: As the
equipment is pulled through the soil, the draft
caused by changes in soil resistance cause the
draft to increase, the compression force on the
upper link will also increase. These changes in
upper link compression, signal the hydraulic
system through internal linkage, to raise the
equipment slightly to maintain uniform draft.
NOTE: Remove lock pin
①
, for draft control
linkage to be operative.
WARNING
Always lower the hydraulic lift and other
hydraulic equipment before stopping the
tractor.
2