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B-81

B-81 Mack Tractor with Crane

B-81 Mack Tractor with Crane

Here is a Mack B-81 I built for the marine contractor on my layout It has a crane mounted behind the cab for loading piling and other heavy timber onto its trailer or another truck. Behind this is a fifth wheel with enough clearance for full turn of a square nose flat trailer with a 24” set back king pin.

Tilt Top Trailer

Tilt Top Trailer

A few manufacturers made tilt top trailers like this that were usually twenty tons capacity. Some were of the tag-a-long type meaning they were hooked on to the dump truck with a pintle hook rather than a fifth wheel like this.

The truck is a Mack B-81 (158” wb) from kit number 95145, the trailer is scratch built, the bulldozer is a Best 60 model from Rio Grande. The Best 60 is from the early 1920s and in this scene would not be a working machine, more likely being an antique being taken to a show.

B-81 Macks Ready to Work

B-81 Macks Ready to Work

Mack B-81 Kit No. 95145 Instructions page 2

Mack B-81 Kit No. 95145 Instructions page 1

New Mack B-81

New Mack B-81

Here's the first look at the B-81, Ralph did a beautiful job as usual, she sits just right on her metal frame with the proper clearance between the top of the 12.00-24 tires and bottom of the fender. The red cab is a B-81X with standard 158” wheelbase. The orange cab is a B-81 SX with a Sheepscot 26288 Marion dump body on a Mack standard 175” wheelbase.

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