MacDon CA25 OM - Manual (Page 20)

SECTION 4. DEFINITIONS
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4 DEFINITIONS
The following terms/abbreviations may be used in this manual:
TERM DEFINITION
AHHC Automatic Header Height Control
API American Petroleum Institute
ASTM American Society Of Testing and Materials
Center-link
A hydraulic cylinder or turnbuckle type link between the header and the
machine that tilts the header
DK Double Knife
GSL Ground Speed Lever
Header
A machine that cuts and lays crop into a windrow, and is attached to a
self-propelled windrower or combine
rpm Revolutions per minute
SAE Society Of Automotive Engineers
SK Single Knife
spm Strokes per minute
Tractor Agricultural type tractor
Truck
A four-wheel highway/road vehicle weighing no less than
7500 lb. (3400 kg)