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Officials of brake manufacturer Bendix Commercial Vehicle Systems said they are wrestling with the challenge of manufacturing and distributing replacement parts for a defective valve that could cause braking problems, which prompted federal and heavy-duty truck manufacturer recalls.

Trailer manufacturers may be facing an embarrassment of riches: too much business.

LISLE, Ill. — Navistar Inc. has formally submitted to the Environmental Protection Agency a 13-liter heavy-duty engine model that it says meets current federal emissions standards.

Trailer makers experienced robust ordering activity to end 2011 and early this year, according to ACT Research Co. and interviews with manufacturers.

The 2010 technology power plants and the new emissions systems represented such a dramatic break from the past that only technicians certified by original equipment manufacturers have been able to work on them while they are still under warranty, truck dealers said.

Commercial vehicle component supplier Accuride Corp. will invest $75 million this year to increase output, quality and reliability; upgrade its manufacturing processes and improve customer service.

WASHINGTON — The Federal Motor Carrier Safety Administration will move forward with a host of developing rules and regulations regarding trucking this year, Administrator Anne Ferro said Tuesday.

To keep their customers’ equipment up and running, truck dealers are increasingly relying on complex algorithms and predictive modeling to maintain inventory levels that will ensure they have the parts truckers need right when they need them, according to dealers and manufacturers.

Manufacturing activity in the Philadelphia region expanded at a faster pace in January, the Federal Reserve Bank of Philadelphia said.