Understanding truck chassis

October 06, 2020
Pat Lucas – Field Sales Manager

When gathering information on a truck, start by identifying the truck manufacturer class and gross vehicle weight rating (GVWR); this information may be found in the truck model number. We can then ask what engine and transmission the chassis will have.

The next step is determining the engine size and transmission options. For example, in a Class 3 through Class 8 chassis, the engine size options span from 5-liter 7-liter, 9-liter, 11-liter, 13-liter, and even up to 15- or 16-liter. It is worth noting that Class 1 and Class 2 trucks are generally pickup trucks, and do not offer an opening for a power take-off (PTO).

Engine size and placement in the chassis will affect where the transmission will be and this will address the opening available for the PTO. This opening can be affected by cross members, spring hangers, air tanks, battery boxes set back front axle or set forward axle, and, with new emission standards, the Diesel Particulate Filter (DPF) and Selective Catalytic Reduction (SCR). This can also determine which opening is available to use on the transmission.

Next, we determine transmission manufacturer and available PTO openings. At this time, we look at the actual PTO application and determine horsepower and torque requirements if it involves a pump or a driveline. We may need to change the arrangement, add an adapter, or add a shaft extension because of interference issues this is all determined by the truck chassis and transmission manufacturer.

With this information we can then start building a system for that chassis to include a combination of PTO, pump, valve assembly, hydraulic hose assemblies, and or a cylinder.

Muncie Power Products has a dedicated team of customer service managers to help with any application needs. Customer service has been a priority since day one at Muncie Power, so rest assured the team has a wealth of knowledge and experience to share.