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Service Rating

1. A designation that indicates the type engine an oil is suited for. 2. The temperature and/or load rating of a tire.

Service Representative

A manufacturer's agent who works in the local area to provide direct and immediate service to the dealership relative to customer service.

Service Station Dealers Of America (SSDA)

A national federation of service station owners.

Service Technician

One actively involved in troubleshooting, maintenance, and repair of the vehicle.

Service Valves

Special manually operated or Schrader-type valves that allow connecting gauge hoses to a pressurized system during servicing procedures.

Service Writer

One who writes work orders.

Servo

1. A device that converts hydraulic pressure to mechanical movement, such as a brake-wheel cylinder. 2. A vacuum operated unit that attaches to the throttle linkage to move the throttle on a cruse control system.

Servo Action

A method of brake construction in which a primary shoe pushes a secondary shoe to generate self-energization.

Servo Brake

A drum brake in which brake shoes are linked, so that the braking force of one shoe amplifies the input of the other shoe.

SES

Service engine soon.

Set Screw

A type of screw having a point that fits into the matching recess of a shaft to secure a pulley or gear.

Setback

A difference in wheelbase from one side of a vehicle to the other.

Setup

The engine transmission/drivetrain and chassis combination that offers improved performance.

Severe Ring

A piston ring that exerts a high amount of pressure against the cylinder wall, often used in an engine with sever cylinder-wall wear.

Sevomotor

An electrical motor that produces rotation of less than a full turn.

Sewing Machine

A small, foreign car.

SFE

Society of Fuse Engineers.

SFI

[1] Sequential Multiport Fuel Injection.

Shackle

A swinging support for the rear end of a spring that permits it to vary in length as it deflects.

Shackle Assembly

This assembly is attached to the front spring eye and bushing an is then mounted through a shackle bushing to the frame allowing the leaf spring to pivot up and down.