Glossary “low spot” Definition:
Also called a dent, it is an area that is recessed below the surrounding surface.
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low side pressure
Glossary “low side pressure” Definition:
Pressure in the low side of an A/C system, from the evaporator inlet to the compressor inlet, as may be noted on the low-side pressure gauge.
low side service valve
Glossary “low side service valve” Definition:
Valve located on the suction side of the A/C system that allows the technician to check low-side pressures or perform other necessary service operations.
low speed
Glossary “low speed” Definition:
The gearing that produces the highest torque and the lowest vehicle speed.
low pressure side
Glossary “low pressure side” Definition:
1). Usually refers to the return side of a fluid or air system having a low pressure. 2). Often referred to as suction side.
low pressure switch
Glossary “low pressure switch” Definition:
Switch that is actuated due to a drop in system pressure.
low pressure vapor line
Glossary “low pressure vapor line” Definition:
Term used for suction line of a A/C system.
low side
Glossary “low side” Definition:
Term used for suction side.
low pedal
Glossary “low pedal” Definition:
1). Condition where excessive clearance, at some point in the braking system, or a low fluid level, causes almost full pedal movement for the application of the brakes. 2). The clutch pedal position of a Model T when engaged in low gear.
low pressure
Glossary “low pressure” Definition:
Relative term to describe below normal pressure in the low side of an A/C system.
low pressure control
Glossary “low pressure control” Definition:
Electrical or mechanical device used to control pressure in the low side of a system.
low pressure cutoff switch
Glossary “low pressure cutoff switch” Definition:
Electrical switch that is activated by a predetermined low pressure, to open a circuit during certain low-pressure periods.
low pressure line
Glossary “low pressure line” Definition:
Hose or line used to carry low pressure vapor, liquid, or air.
low maintenance battery
Glossary “low maintenance battery” Definition:
A conventional, vented lead-acid battery that requires periodic maintenance.
low mounted coil spring suspension
Glossary “low mounted coil spring suspension” Definition:
Type of suspension having a coil spring located above the lower control arm, with the top end of the spring contacting the car frame, found primarily on vehicles having a separate sub-frame or stub frame.
low force compression valve spring
Glossary “low force compression valve spring” Definition:
Type of valve spring that needs less force to compress the spring and open the valve. Usually found on engines with low lift camshafts and used to keep friction losses to a minimum.
low gear
Glossary “low gear” Definition:
Speed obtained from a planetary gear set when the internal gear is held and power is applied to the sun gear, producing an increase in torque.
low gearing
Glossary “low gearing” Definition:
A drive ratio that provides maximum output at a low road speed.
low head pressure
Glossary “low head pressure” Definition:
High side pressure that is lower than expected for a given condition.
low impedance
Glossary “low impedance” Definition:
Refers to low resistance in electrical test meters. Low impedance meters should NEVER be used on electronic circuits.