Red and Blue airlines connect the tractor air brake system to the trailer. Red is emergency brakes and applies system air pressure to the...

Republished due to content error - rail treatments are applied AFTER the holes are punched or drilled to ensure protection inside the...

Today’s engines are designed to deliver maximum torque at low RPM. This provides for good fuel economy with proper gearing Torque curves...

Inverters convert 12V Direct Current (aka: battery power) into 120V Alternating Current (aka: 60HZ outlet power) for appliances such as TVs,

Vocational Information includes intended service, commodity, and body or trailer type. Why would the OE care, and what do they do with the i

When it comes to rear discharge mixer trucks, they are basically two classifications. Bridge formula and Standard. Each has a unique...

A Air dryers are something we give little thought to until something goes wrong. Most of us understand that dryer sizing is related to...

Here is a topic of conversation. And when I say conversation, at times more like a heated debate. It could also be phrased as: Which axles d

Power Take-Off units, or PTOs, are used to deliver power to auxiliary equipment. Most vocational trucks will utilize one or more of these un

A SCAAN is a full analysis of the projected vehicle operation. It is needed to verify that the correct torque converter is selected, and tha

Typically, a 9ALL transmission is used for pouring curbs, a mixer application. It is the only transmission that is geared low enough to cree

Fixed pins are tied in o the front frame structure, and are singular, centered in the bumper. They are typically capable to 80,000 lbs. of

Minimum lift axle spacing can be tricky. Suppliers have become really good at packaging their products so more axles can go under a...

Wheel slip occurs when power is routed to any one outer end of drive axles due to an extreme low coefficient of rolling resistance within...

Stinger-steered log trailers consist of a tractor with a log bunk mounted over the fifth wheel. This log bunk is capable of rotating on...

The grade to slope numbers have been translated for your use below, since they represent such a small area of the ‘protractor’ image. Just b

Fasteners come in all styles. When you are talking about frame mounted components on trucks it is narrowed down to two styles, huck bolts...

If the objective is merely a haul a few pounds more on each load, then the ROI may not be present.

Did you ever think that there is more to clear than just the trailer to cab or sleeper?

or 2021 Cummins will release new engines. All of the Efficiency Series engines will achieve peak torque at 950 rpm. Downspeeding is one of t