Glossary “digital” Definition:
1). Relating to the technology of computers and data communications where all information is encoded as bits of 1’s or 0’s that represent ON or OFF states. 2). A numerical readout.
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digital computer
Glossary “digital computer” Definition:
A device that manipulates digital data and performs arithmetic and logic operations on such data.
digital device
Glossary “digital device” Definition:
A device that has only two states of operation, on and off.
digital electronic fuel injection
Glossary “digital electronic fuel injection” Definition:
An early Cadillac electronic fuel-injection system.
differential pressure valve
Glossary “differential pressure valve” Definition:
Maintains a constant pressure to fuel injectors.
differential ring gear
Glossary “differential ring gear” Definition:
A large circular hypoid-type gear enmeshed with the hypoid drive pinion gear.
differential side gear
Glossary “differential side gear” Definition:
The gears that are internally splined to the axle shafts, which are driven by the pinion gears.
differential pinion gears
Glossary “differential pinion gears” Definition:
Small, beveled gears located on the differential pinion shaft.
differential pinion shaft
Glossary “differential pinion shaft” Definition:
A short shaft locked to the differential case. This shaft supports the differential pinion gears.
differential pressure
Glossary “differential pressure” Definition:
The pressure difference between two regions, such as between the intake manifold and the atmospheric pressures when the engine is operating.
differential assembly
Glossary “differential assembly” Definition:
The mechanism that relates to front- or rear -driving axles that permits unequal travel distances and speeds between the vehicle’s driving wheels.
differential case
Glossary “differential case” Definition:
The housing of the differential that contains the side and pinion gears and the pinion shaft, and also serves as a mounting place for the ring gear.
differential case spreader
Glossary “differential case spreader” Definition:
Tool that attaches to the differential housing on some differentials. When force is applied to the tool, the case is spread and the differential assembly can be removed. When the force is removed, the case returns to its original position and provides preload to the carrier assembly.
differential drive gear
Glossary “differential drive gear” Definition:
A large, circular helical gear that is driven by the transaxle pinion gear and shaft and that drives the differential assembly.
differential housing
Glossary “differential housing” Definition:
Also known as rear-axle housing. A cast iron or aluminum assembly that houses the differential unit and the drive axles.
differential lock
Glossary “differential lock” Definition:
A toggle or push-pull type air switch that locks together the rear axles of a tractor so they pull as one for off-the-road operation.
dieseling
Glossary “dieseling” Definition:
A condition in which a carbureted engine continues to run after the ignition is shut off.
differential
Glossary “differential” Definition:
The section of the rear-axle assembly that provides three functions: it allows the wheels to revolve at different speeds during turns, provides the final gear reduction and changes the angle of drive 90 degrees.
differential action
Glossary “differential action” Definition:
An operational situation where one driving wheel can rotate at a slower speed than the opposite driving wheel.
diesel injection nozzle tester
Glossary “diesel injection nozzle tester” Definition:
Consists of a reservoir filled with special calibration fluid, high pressure pump, and the adapters neeeded to attach a pressurized line to a nozzle. Used to bench test injector nozzles.