Peterbilt Motors Co. (Denton, TX), a division of PACCAR Inc. (Bellevue, WA), manufactures trucks for the over-the-road, construction, municipal and medium-duty markets.

In the past the company would experience problems on its assembly lines because the anaerobic sealing compounds that it used during preassembly did not offer the pliability necessary for part adjustment during final assembly.

To solve this problem, the company began using Powerseal 932 sealing adhesive from Hernon Manufacturing Inc. (Sanford, FL). Peterbilt Motors chose the material because it offered the necessary pliability while still maintaining a consistent seal in an environment that includes exposure to hydraulic fluid and motor oil.

Like the entire Powerseal line, Powerseal 932 is a single-component, nonhardening pipe sealant that lubricates and seals threaded pipe connections and O-rings. It is unaffected by exposure to water, oil, ammonia, glycerin, steam and exhaust fumes. Because it remains pliable, it can withstand severe vibration without crumbling, cracking or shrinking. It is safe to use on a wide range of substrates, including plastics and metals, unlike many anaerobic sealants that can cause stress cracking on threaded plastic components.

To further speed up the assembly process and reduce sealant waste, Peterbilt Motors implemented the Autosealer 2600 sealant dispensing system, also from Hernon Manufacturing. The Autosealer 2600 is a low-cost, portable system for dispensing paste sealants directly onto threaded components.

Ultimately, both the Powerseal 932 adhesive and Autosealer 2600 dispensing system proved effective enough that they have since been approved for use throughout all of PACCAR's manufacturing divisions, including Kenworth Truck Co. (Kirkland, WA), and DAF Trucks (Eindhoven, The Netherlands).

The company has also approved the use of the Dripstop line of anaerobic sealants, also manufacturing by Hernon.

For more on anaerobic sealants and dispensers, call 800-527-0004, visit www.hernonmfg.com or eInquiry 3.

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