Cat 740 to 745 Bare Chassis specifications

Select the unloading system before comparing truck capacity

The 740, 740 EJ, 745 and 745 bare chassis serve different loading and unloading arrangements. A tipper's heaped volume does not describe an OEM tank, and an ejector's cycle is not a raised-body cycle. Establish whether the job needs tipping, controlled spreading or a specialty body before comparing their engine outputs.

The 740 EJ has a material-size condition

Caterpillar describes on-the-go spreading as an ejector capability, while its assisted-ejection sequence applies the service brakes and selects neutral before moving the blade. Those are different operating descriptions. Have the operator demonstrate the intended method under the machine's operating instructions instead of assuming every assisted cycle occurs while travelling.

The manufacturer also specifies material smaller than its stated rock-diameter limit for the ejector body. That restriction matters when considering coarse blasted material. An ejector suited to spreading a finer load is not automatically the right body for every rock-hauling job.

The 745 tipping sequence finishes in float

On the 745, assisted hoisting applies the brakes, selects neutral and raises the body using the required engine speed. The corresponding lowering sequence puts the lowered body in float. Compare that sequence with the ejector's blade retracting into its body; the two mechanisms have different movements and clearance needs.

The 745 bare frame offers a longer wheelbase

Caterpillar offers both standard and long-wheelbase 745 chassis configurations, with or without hoist cylinders. The longer arrangement is intended to accommodate longer specialty bodies. Body length and cylinder supply must therefore appear in the conversion specification; a bare-frame order cannot be defined solely by the finished tipper's payload or heaped capacity.

The 745 payload is a mass rating; its power rating has a fan condition

The technical specification pairs its metric payload with US tons. The earlier entry below used the metric tonne symbol against the US quantity; its correction keeps both original quantities with explicit units.

The same specification defines advertised net engine power with the fan at minimum speed and gives a separate maximum-fan figure. An engine-output comparison must keep that equipment condition visible. The loaded axle masses are also separate from the payload increments; adding empty and loaded totals would count the truck twice.