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Low Head

A term used for low-head suspension.

Low Maintenance Battery

A conventional, vented lead-acid battery that requires periodic maintenance.

Low Pedal

1. A 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

A relative term to describe below normal pressure in the low side of an air conditioner system.

Low Rider

A vehicle with small wheels so that it has been lowered as much as possible.

Low Risers

Standard-height cylinder heads developed in the 1960's by Ford for 406, 427, and 428 cid engines.

Low Side

A term used for suction side.

Low-head Fuel

A gasoline that contains less that 0.018 ounces (0.5 grams) per gallon (3.785 liter) of tetraethyl lead, no longer sold in this country due to the environmental impact.

Low-head Pressure

The high-side pressure that is lower than expected for a given condition.

Low-loss Fitting

A fitting designed to close automatically or manually to prevent fluid or vapor loss when used at connecting points between hoses, service valves, vacuum pumps, recovery or recycle machines.

Low-mounted Coil Spring Suspension

A 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 or stub frame.

Low-pressure Control

An electrical or mechanical device used to control pressure in the low side of a system.

Low-pressure Cutoff Switch

An electrical switch that is activated by a predetermined low pressure to open a circuit during certain low-pressure periods.

Low-pressure Line

A hose or line used to carry low pressure vapor, liquid, or air.

Low-pressure Side

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

A switch that is actuated due to a fall in pressure.

Low-pressure Vapor Line

A term used for suction line.

Low-side Pressure

The pressure in the low side of an air conditioning system, from the evaporator inlet to the compressor inlet, as may be noted on the low-side pressure gauge.

Low-side Service Valve

A device located on the suction side of the system that allows the service technician to check low-side pressures or perform other necessary service operations.

Low-speed System

A circuit in the carburetor that provides fuel to the air passing through it during part-throttle, low-speed operation.