John Baxter

Down to a science

A precise report that reveals exactly how much of a certain metal is in your oil is nearly useless unless the lab knows exactly what mod...

Read More

Royal flush

The most important single part of maintaining the liquid portion of the cooling system is using the same type of coolant, with the same ...

Read More

Diesel’s competitors

A Norcal Waste Systems truck is refueled with liquid natural gas. LNG also can be used in medium-duty trucks, though less exotic spark i...

Read More

ABCs of APUs

The unit has a main engine and generator (left) and a climate control unit (right), as well as a condenser unit that has already been un...

Read More

Sharpening the knife

Caterpillar C15 Today's truck engines have parts that fit better, expand and contract less, and have smoother surfac...

Read More

In search of shine

While chrome additions would seem to be just frills, they're a lot like the rest of the truck - they do their job b...

Read More

Winter green

This illustration shows how an anti-gel can keep fuel in a liquid state. Both test tubes were chilled to the same frigid temperature....

Read More

Perfect engagement

How the wear indicator on a Solo clutch looks when it needs to be replaced. The clutch has two jobs - allowing smooth...

Read More

From cabover to conventional

A classic cabover design with this International Transtar, made from 1968-78. In the 1970s, it seemed as if everybody...

Read More

Trading tanks

Replacing a damaged fuel tank is a simple, do-it-yourself job. Road detritus can take a toll on your fuel tank. We'v...

Read More