MacDon A40-D, Operator'S Manual

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Revision A
Term Definition
North American header Header configuration typical in North America
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
RoHS (Reduction of
Hazardous Substances) A directive by the European Union to restrict use of certain hazardous substances
(such as hexavalent chromium used in some yellow zinc platings)
rpm
Revolutions per minute
SAE Society of Automotive Engineers
Screw
A headed and externally threaded fastener that threads into preformed threads or
forms its own thread into a mating part
Self-Propelled (SP)
Windrower
Self-propelled machine consisting of a power unit with a header
SKD Single-knife drive
Soft joint
A joint made with use of a fastener where joining materials are compressible or
experience relaxation over a period of time
spm
Strokes per minute
Tension
Axial load placed on a bolt or screw, usually measured in Newtons (N) or
pounds (lb.)
TFFT Turns from finger tight
Timed knife drive
Synchronized motion applied at cutterbar to two separately driven knives from a
single hydraulic motor
Torque
The product of a force X lever arm length, usually measured in Newton-meters (Nm)
or foot-pounds (lbf
∙
ft)
Torque angle
A tightening procedure where fitting is assembled to a precondition (finger tight) and
then nut is turned farther a number of degrees to achieve its final position
Torque-tension
The relationship between assembly torque applied to a piece of hardware and axial
load it induces in bolt or screw
Washer
A thin cylinder with a hole or slot located in the center that is to be used as a spacer,
load distribution element, or locking mechanism
WCM Windrower control module
Windrower Power unit of a self-propelled header
WOT Wide open throttle
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