A car's handbrake is the lever to a completely mechanical braking system, which will bypass the primary hydraulic system if it fails. When the. Hand brake lever from a Geo Storm. In this photo, the lever mechanism is shown not installed in the car. Brake warning light. ISO symbol used to indicate that the parking brake is applied. In road vehicles, the parking brake, also called hand brake, emergency brake, or e-brake,  ‎Emergency brake · ‎Driving and parking · ‎Large vehicles · ‎Railroad hand brakes. The handbrake acts on the shoes by means of a mechanical system, separate from the hydraulic cylinder, consisting of a lever and arm in the brake drum; they.


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Handbrake mechanism and relay-lever-compensator hand-brake cable linkage layout. Hand-brake Lever Mechanisms Hand-brake lever assemblies are used to apply or release the parking brakes. These assemblies may also be designed to provide additional leverage to the system.

Handbrake Mechanism & Cables - MGB

This mechanism uses a rectangular box section tube bolted to the dashboard. A draw bar is fitted in this tube and it has handbrake mechanism spring loaded pawl and handbrake mechanism actuator strut.

The pawl engages a ratchet made on the underside of the box tube. For applying the parking brake, the driver pulls the handgrip lever out and releases his grip. To release the brakes, the driver pulls the handgrip and squeezes the release lever.

As handbrake mechanism result the push rod forces the actuating strut to clear the pawl from the ratchet teeth.

The handbrake mechanism

The hand palm-grip is then moved forward so that the brakes are released. Pull-squeeze palm-grip and release hand-brake lever. This arrangement uses a handbrake mechanism draw bar with ratchet teeth cut on one side.

Two pawls engage these teeth.

The handbrake mechanism

A peg, inserted near the lower end of the bar, limits the handbrake mechanism twist movement to about 90 degrees. For applying the parking brake, the handgrip is twisted to move the ratchet teeth away from the pawls.


This action causes the pawl edges to come in contact with the smooth surface portion of the draw-bar. When the bar is pulled out Fig. handbrake mechanism


Pull-twist handgrip and release hand-brake lever. This construction, the most popular type at present, uses a hand-lever.

One end of the hand lever is connected directly to the brake cable while the other handbrake mechanism forms the handgrip, handbrake mechanism a release press button.

This lever is pivoted on a ratchet bracket.

Hand Brake or Parking Brake (Automobile)

When the driver pulls up the lever arm, the spring-loaded pawl slides over the ratchet teeth causing maximum cable tension. At this point the lever is released, and the vehicle park-pulls up handbrake mechanism hand lever slightly Fig.


Pull-press-button hand-brake lever handbrake mechanism release light-duty. To release the parking brake, the driver to relax the tension on the pawl, and then presses in the press-button with the thumb, so that handbrake mechanism pawl teeth are rotated clear of the ratchet teeth.

This causes the hand lever to returns fully down to the released position Fig.

Hand Brake or Parking Brake (Automobile)

In this design, the piston-grip hand-lever is pivoted on the ratchet plate. To obtain leverage, the cable is connected relatively close to this handbrake mechanism point.

When the hand lever is pulled, the spring-loaded pawl just slides over the backs of the ratchet teeth providing maximum tension to the cable.

Now the pistol-grip is released, and the slight forward movement pushes the spring-loaded pawl into engagement with the nearest ratchet tooth. To release the handbrake mechanism brake, the release trigger is squeezed and the hand-lever is drawn back slightly.

This makes the pawl free handbrake mechanism it to rotate and clear the ratchet teeth. The lever is then pushed forward fully to the released position Fig.

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