St. Denis Station, Maryland
A look at the movements and states of operation of the air brake relay.
Relays are fitted to an air braking system for larger vehicles to speed up the application and release of the brakes, minimising brake lag, which is the time it takes between the driver operating the controls (park brake/foot brake valve) and the action actually happening at the brakes.
For a bit more background before watching this video, take a look at our “introduction to air brakes”
For the full video, with narration and a full explanation of the video, see here:
If you like what you see hit the like button, and if you would like to see more subscribe to Educational Mechanics here:
Visit our website for a larger collection at:
Another Way by Psykick (c) 2016 Licensed under a Creative Commons Attribution (3.0) license.
This is a quick and easy way to check if your fuel pump is really gone or if its just a relay.Im not saying this is going to fix all fuel pump problems but its a great place to start before spending hundreds on someone putting in a new fuel pump for you or spending hours of labor and a few hundred on materials you may not need. AS ALWAYS ALL REPAIRS ARE AT YOUR OWN RISK I AM NOT TELLING YOU WHAT TO DO JUST GIVING YA A HINT AT WHAT MAY BE WRONG
This is a quick intro to a full air suspension conversion kit for a leaf spring vehicle. We supply these in various different kits available at www.airride.co.uk/air/shop
Full air for the rear axle means that the air suspension is the sole means of suspension and support. This gives full control and means that the vehicle can be lowered as well as lifted. It also means that the ride is better. This is a far more costly and involved conversion but if the budget supports it then this is the absolute best air suspension available for a leaf spring vehicle. It gives the best ride, the best handling and complete control of ride height.
Here’s what’s inside the fuel pump and how it works on your car.
The fuel pump, or fuel sender unit, is responsible for sending pressurized fuel to the fuel rail on the engine. It is normally situated inside the gas tank, cooled by surrounding fuel.
The fuel pump assembly consists of an electric DC motor with a paddle, a pickup screen, float, tank level sensing unit, filter, pressure regulator as well as the empty level sensor.
The DC motor drawings fuel through a turning paddle in through the housing of the motor, past the rotors and brushes out the top.
Fuel then saturates the filter, where it can then make its way up the top to the fuel line leading to the engine. Excess pressure built up in the filter is bled off through a pressure regulator valve at the bottom of the assembly, where the fuel is returned to the tank.
The tank float attaches to an arm that attaches to a metal head. The head moves in a semi circular pattern against a circuit board with printed resistors. The measured resistance values are relayed back to the instrument cluster to determine fuel amount.
The empty level sensor is a device that looks like a resistor. When submerged in fluid, it reads 2K ohms. When dry, it reads an open circuit and turns the light on the dashboard warning of low fuel in the tank.
Assembly of these components are held together by plastic pieces which are clipped together. Often these require disassembly when replacing defective pump units, as only the motor needs to be replaced.
The fuel pump in this video was removed from a 2001 Toyota Corolla.
Link to Etsy shop where you can purchase speedkar99’s brother’s socks, t-shirts or hoodies:
Check out the speedkar99 Facebook page:
Check out the speedkar99 Linkedin page:
Follow speedkar9 on Instagram for behind the scenes coverage:
Subscribe for more videos just like this: