Welcome to Princeton Delivery Systems,
the leading manufacturer of truck mounted
forklift products and the home of the

General Building Materials

The Princeton PiggyBack® Delivery System is a proven method for delivering general building materials that has revolutionized customer service and delivery efficiency.

The Concept

The Princeton PiggyBack® Delivery System is a proven method for job site delivery. It has revolutionized customer service and delivery efficiency throughout the US building supply industry. Historically, materials were delivered to the edge of a site by a truck-mounted crane, dump bed or simply unloaded by hand. The customer, or your stocking crew, then had to move the materials to where the work was being done. The truck-mounted forklift enables your driver to deliver materials wherever your customer or crew wants them – fast, safe over even the roughest ground. A PiggyBack® also comes in handy for pickups or correcting misplacement of products on the job site. It will also save money by reducing delivery related product damage. Princeton's truck-mounted forklifts are available in many different models and can be mounted behind almost any truck or trailer.

A wide range of available lift heights, capacities up to 8,000 lbs and other features allow the Princeton unit to be configured to your exact delivery requirements.

If you currently use towed or trailer carried forklifts, you already recognize the benefits of having a portable unloading unit with your delivery vehicle. The Princeton PiggyBack® Delivery System provides all these benefits in a highly efficient package that eliminates the complications of towed vehicles. Princeton also offers a low profile unit designed for deliveries in height restricted areas.

The Machine

Princeton offers models tailored towards the demanding needs of the building supply industry.


The 5,500 lb capacity PB55+ is the hands down favorite choice of the general building materials industries. It's rugged design, center seating make it ideal for most construction site delivery applications. The PB55+ offers high horsepower, excellent ground clearance and Princeton’s exclusive Trac-Loc traction control system to tackle the roughest job sites. An optional brick & block package makes handling cubed products easier on a job site.


The 5,500 lb. capacity PB55X+ is the first unit in the industry equipped with a standard "Double Reach" feature. This unique feature, which adds an extending scissors reach system to the standard moving mast, doubles the length of the reach of the PB55X+ across the bed. With the PB55X+, your driver now can unload an entire truck or trailer from one side, even from positions where tanks or tandems are located.


The PB70+ Princeton PiggyBack® Delivery System is the most stable, reliable and powerful unit of its kind the industry. It is also the only unit that has 7,000 lb capacity, rated by rough terrain standards. Anti-stall hydraulics, 31" pneumatic sealed tires, center seating, a 56 HP diesel engine and excellent stability make this the most flexible truck mounted forklift for rough terrain deliveries. This unit can deliver a variety of materials faster and safer…almost anywhere on a job site.


The 8,000 lb. capacity PB80+ is designed for those who handle heavy products, or just simply need to handle more product at one time. As with the PB55+, a drywall handling package is optional. This package features load support arms that provide added support a wide loads when traveling on rough terrain. Also, like the PB55+, the PB80+ offers center seating to assure that your operator has a clear view of not only the load but also both front tires. This enables the operator to both position the load more accurately anywhere on the job site and minimize the chance of running over unforeseen obstacles.



The PiggyBack® PB45 is one of the most stable and reliable three wheel-drive 4,500 lb. capacity machine on the market. The machine comes standard with a powerful and reliable 48 HP diesel engine, anti-stall hydraulics, 29" tires, center seating and Trac-Loc for added traction on rugged terrain. The machine is available with either a moving mast or scissors mast. In addition, in the Lo-Pro configuration, the machine is able to deliver a variety of materials to areas previously inaccessible – as low as 81"!

PB55+ 4-Way

The 5,500 lb. capacity PiggyBack® PB55+ 4-Way offers the most versatility in truck-mounted forklifts. It has the lift capacity and power of a PB55+, but adds four directional steering. With the flip-of-a-switch the PB55+ 4-Way  converts into side-directional mode permitting the unit to be driven sideways in the direction of the load. driving the unit “sideways” in the direction of the load. Ideal for delivering extra long loads in those hard to negotiate, highly congested areas previously inaccessible at most construction job sites. Nothing can outmaneuver or outperform the versatile PiggyBack®  PB55+ 4-Way.

All Princeton units exceed ANSI stability standards for rough terrain forklifts.