A boom assembly for a pipelayer includes a boom member having a first end and a second end. The boom assembly includes a first boom block adapted to be removably coupled to the second end of the boom member. The boom assembly includes a second boom block adapted to be removably coupled to a chassis of the pipelayer. The boom assembly includes a first hook block adapted to be removably coupled to the second end of the boom member. The boom assembly includes a second hook block adapted to be operably coupled to the first hook block. The boom assembly also includes a first lifting connector disposed on the first boom block and a second lifting connector disposed on the first hook block. Each of the first lifting connector and the second lifting connector is adapted to removably receive a lifting strap therethrough.

A boom assembly for a pipelayer includes a boom member having a first end and a second end. The boom assembly includes a first boom block adapted to be removably coupled to the second end of the boom member. The boom assembly includes a second boom block adapted to be removably coupled to a chassis of the pipelayer. The boom assembly includes a first hook block adapted to be removably coupled to the second end of the boom member. The boom assembly includes a second hook block adapted to be operably coupled to the first hook block. The boom assembly also includes a first lifting connector disposed on the first boom block and a second lifting connector disposed on the first hook block. Each of the first lifting connector and the second lifting connector is adapted to removably receive a lifting strap therethrough.

Embodiments for a trailer mounted log loader are described. The trailer mounted log loader includes an A-frame made of square beams which have a connection plate attached at one end forming an apex of the A-frame. A hollow connection adapter is positioned between and connected to the connection plates of the A-frame. An extendable boom arm is situated within the hollow connection adapter. The extendable boom arm has an attachment point at a distal end opposite from the hollow connection adapter where an attachable attachment is connectable to the extendable boom arm. A pair of pivot arms are connected to a base of the A-frame. The A-frame pivot arms are in turn pivotally connect to a pair of uprights . . . . The ability to remove the uprights from the support posts allows the trailer mounted log loader to be mounted to any trailer or truck bed or stored when not in use.

A tracked vehicle, such as tracked carrier to carry and enable use of work equipment on various terrains, is provided. The tracked vehicle may comprise a frame comprising an equipment mounting area for mounting work equipment above the frame. The frame may comprise a pair of side rails that have a spacing in a widthwise direction of the tracked vehicle which corresponds to a standard truck frame side rail spacing. An operator cabin comprises a seating area which may comprise a single seat for an operator or a first seat for the operator and a second seat for a second person next to the operator. At least part of a power plant of the tracked vehicle may be mounted above the frame and behind the operator cabin. The tracked vehicle comprises a plurality of track assemblies for traction of the tracked vehicle.

A tracked vehicle, such as tracked carrier to carry and enable use of work equipment on various terrains, is provided. The tracked vehicle may comprise a frame comprising an equipment mounting area for mounting work equipment above the frame. The frame may comprise a pair of side rails that have a spacing in a widthwise direction of the tracked vehicle which corresponds to a standard truck frame side rail spacing. An operator cabin comprises a seating area which may comprise a single seat for an operator or a first seat for the operator and a second seat for a second person next to the operator. At least part of a power plant of the tracked vehicle may be mounted above the frame and behind the operator cabin. The tracked vehicle comprises a plurality of track assemblies for traction of the tracked vehicle.

Embodiments for a trailer mounted log loader are described. The trailer mounted log loader includes an A-frame made of square beams which have a connection plate attached at one end forming an apex of the A-frame. A hollow connection adapter is positioned between and connected to the connection plates of the A-frame. An extendable boom arm is situated within the hollow connection adapter. The extendable boom arm has an attachment point at a distal end opposite from the hollow connection adapter where an attachable attachment is connectable to the extendable boom arm. A pair of pivot arms are connected to a base of the A-frame. The A-frame pivot arms are in turn pivotally connect to a pair of uprights . . . . The ability to remove the uprights from the support posts allows the trailer mounted log loader to be mounted to any trailer or truck bed or stored when not in use.

Embodiments for a trailer mounted log loader are described. The trailer mounted log loader includes an A-frame made of square beams which have a connection plate attached at one end forming an apex of the A-frame. A hollow connection adapter is positioned between and connected to the connection plates of the A-frame. An extendable boom arm is situated within the hollow connection adapter. The extendable boom arm has an attachment point at a distal end opposite from the hollow connection adapter where an attachable attachment is connectable to the extendable boom arm. A pair of pivot arms are connected to a base of the A-frame. The A-frame pivot arms are in turn pivotally connect to a pair of uprights . . . . The ability to remove the uprights from the support posts allows the trailer mounted log loader to be mounted to any trailer or truck bed or stored when not in use.

A self-propelled trailer is provided and includes a frame, a pair of rear drive wheels, a steerable wheel, a drive system, a platform and a lifting device. The frame forms an undercarriage chassis upon which the pair of rear drive wheels and steerable wheel secured to an undercarriage chassis along opposite ends thereof. The drive system includes a power system connected to the pair of rear drive wheels and a control system connected to the steerable wheel. The platform is positioned above and secured to the undercarriage chassis, and includes a planar deck and a subframe extending upward from the undercarriage chassis and spacing the planar deck therefrom. The lifting device is secured to the undercarriage chassis and positioned between the steerable wheel and the pair of rear drive wheels with respect to a length of the frame, and includes a crane extending upward from the frame.

Methods and apparatus to power a crane on a work truck using an engine-powered service pack are disclosed. An example auxiliary power system for a vehicle includes an engine, a generator configured to convert mechanical energy from the engine to electrical energy, and power conversion circuitry configured to provide electrical power to a crane to enable the crane to lift at least a portion of a rated load, and configured to convert the electrical energy from the generator to output DC power.

Methods and apparatus to power a crane on a work truck using an engine-powered service pack are disclosed. An example auxiliary power system for a vehicle includes an engine, a generator configured to convert mechanical energy from the engine to electrical energy, and power conversion circuitry configured to provide electrical power to a crane to enable the crane to lift at least a portion of a rated load, and configured to convert the electrical energy from the generator to output DC power.