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Revision A
12.5
Definitions
The following terms and acronyms may be used in this instruction:
Term
Definition
AHHC
Automatic Header Height Control
API
American Petroleum Institute
ASTM
American Society of Testing and Materials
Bolt
A headed and externally threaded fastener that is designed to be paired with a nut
Center-link
A hydraulic cylinder link between header and machine used to change header angle
CGVW
Combined gross vehicle weight
D1 Series Header
MacDon D120, D125, D130, D135, D140, and D145 combine draper header
DDD
Double-draper drive
DK
Double knife
DKD
Double-knife drive
DR
Double reel
Export header
Header configuration typical outside North America
FFFT
Flats from finger tight
Finger tight
Finger tight is a reference position where sealing surfaces or components are making
contact with each other, and fitting has been tightened to a point where fitting is no
longer loose
FM100
Float module used with a D1 or FD1 Series header for combining
GSL
Ground speed lever
GVW
Gross vehicle weight
Hard joint
A joint made with use of a fastener where joining materials are highly incompressible
Header
A machine that cuts crop and feeds it into an attached combine
Hex key
A tool of hexagonal cross-section used to drive bolts and screws that have a hexagonal
socket in head (internal-wrenching hexagon drive); also known as an Allen key and various
other synonyms
hp
Horsepower
JIC
Joint Industrial Council: A standards body that developed standard sizing and shape for
original 37° flared fitting
Knife
A cutting device which uses a reciprocating cutter (also called a sickle)
n/a
Not applicable
NPT
National Pipe Thread: A style of fitting used for low-pressure port openings. Threads on
NPT fittings are uniquely tapered for an interference fit
Nut
An internally threaded fastener that is designed to be paired with a bolt
ORB
O-ring boss: A style of fitting commonly used in port openings on manifolds, pumps,
and motors
ORFS
O-ring face seal: A style of fitting commonly used for connecting hoses and tubes. This
style of fitting is also commonly called ORS, which stands for O-ring seal