DESCRIPTION
Term
Definition
ORB
O-ring boss: a
style o f fitting commonly used in port opening on manifolds, pumps
and motors.
ORFS
O-ring face seal: a style of fitting commonly used for connecting hoses and tubes.
This style o f fitting is also commonly called ORS, which stands for O-ring seal.
PTO Power Take-Off.
RoHS (Reduc
tion of
Hazardous
Substances)
Adirective
by the European Union to restrict the use of certain hazardous
substanc e
s (such as hexavalent chromium used in some yellow zinc platings).
SAE Society Of Automotive Engineers.
Screw
A headed and externally threaded fastener that threads into preformed threads or
forms its own thread in one of the mating parts.
Self-Pr
opelled (SP)
Windrow
er
Self-pr
opelled machine consisting of a power unit with a header.
Soft joint
A joint made with th e u se of a fastener w here the joining materials are compre ssible
or experience relaxation over a p eriod of time.
spm
Strokes per minute.
Tractor Agricultural type tractor.
Truck
A four-wheel highway/road vehicle weighing no less than 7500 lbs (3400 kg).
Tension
Axia
l load placed on a bolt or screw, usually measured in pounds (lb) or Newtons (N).
TFFT
Turns from finger tight.
Tor qu e
The product of a force X lever arm length, usually measured in foot-pounds (ft·lbf)
or Newton-mete rs (N·m).
Torque angle
At
ightening procedure where the fitting is assembled to a p re co ndition (finger
ti
ght) and then the nut is turned further a number of degrees or a number of flats to
ac
hieve its final position.
Torque-tension
The relationship between the assembly torque applied to a piece of hardware and
the axial load it induces in the bolt or screw.
UCA
Upper cross auger.
Washer
A thin cylinder with a hole or s lot located in the center and is to be used as a spacer,
load distribution element, or a locking mechanism.
Windrower
Power unit of a self-propelled header.
WCM Windrower control module.
169890 28 Revision A
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