The Vanguard Combo Unit is a pipelayer attachment for Cat® D6N track type tractors. With the support of Caterpillar® and the engineering expertise of Vanguard Equipment Inc., this system includes winches, boom, mode control, lockout cylinders and attachment frames.

Utilizing substantial research with industry leaders and technicians, Vanguard Equipment, Inc. developed the CPW 125-4 Series 2 welding package. PipeLine Machinery International is proud to be the exclusive distributor of this state-of-the-art unit that will revolutionize the quality and efficiency of on-site pipeline welding.

The Cat® 953D Welding Tractor is based on the construction equipment 953D in production since 2007. With valuable input from our customers and dealers, it has been equipped with the best and reliable components currently used in the pipeline industry to provide the best uptime to your fleet.

Wet Deck Hydraulic Conversion for Pipelayers

Wetdeck Hydraulic Conversion

Vanguard Equipment, Inc.’s Wetdeck package economically converts aging Caterpillar 572E/G, 583H/K, 594G/H pipelayers’ mechanical drawworks into state-of-the-art hydraulic units.


In addition to a complete line of Caterpillar pipelayers, sidebooms, track-type tractors (dozers)excavators and motor graders, PLM is the exclusive distributor of Vanguard Continuously Powered Welding tractors, Wet Decks (hydraulic conversion kits for Caterpillar pipelayers) and Combo tractors (pipelayer attachments on D6 Caterpillar tractors). For more information, please contact your PLM account manager or click here to contact us.