300 Ton Used LS818 Crawler Crane

General Specifications

Mounting — crawler

Lower frame

All-welded, precision machined surfaces for turntable bearing and cover plates.

Turntable bearing

Ball bearing type; outer race with external swing (ring) gear bolted to lower frame. Inner race provides “Quick Disconnect” capability for mounting revolving superstructure.

Crawler side frames

All-welded, precision machined. Positioned on cross axles by dowels and held in place with two patented, adjustable wedgepackings per side frame. Optional quick disconnect fittings on travel motor hydraulic lines provided to facilitate removal of side frames. Optional — two hydraulic cylinders on lower frame provided to extend/retract, or assist in removing, side frames.

Track drive sprockets

Cast steel, heat treated; one per side frame. Track drive sprocket assembly involute splined to shaft, mounted on anti-friction bearings. Each track drive sprocket is powered by a hydraulic motor through double reduction gear drive.

Track idler wheels

Cast steel, heat treated. Mounted on two bronze bushings.

Track carrier slide rails

Tracks slide on rails; on top of each side frame.

Track rollers

Thirteen double flange, heat treated rollers per side frame; each mounted on two bronze bushings.

Tracks

Heat treated, self-cleaning, multiple hinged track shoes joined by close-fitting full floating pins. 55 shoes per side frame. Standard — 50” (1.27 m) wide; optional — 60” (1.52 m) wide shoes.

Track adjustment

Idler wheel adjusted by means of hydraulic cylinder and hand pump. Idler wheel shaft held in position with shims after adjustment is made.

Independent hydraulic travel/steering

Power transmitted from hydraulic motors through gear reduction unit into track drive sprocket.

Travel motors

An axial piston motor is bolted to a speed reducer at inner drive end of each crawler side frame. Power is transmitted through the speed reducer to a final drive planetary. Output of final planetary is splined to track drive sprocket.

Travel / Steering

One variable displacement axial piston pump delivers power to each travel motor.

Steering is provided through the travel motors which can be powered simultaneously or individually for straight-line travel (forward or reverse), pivot or differential turns, or the tracks can be counter rotated to spin turns.

Travel speeds — 0.5 m.p.h. (0.80 km/h).

Parking brake — Multiple disc type brakes; one located between each individual travel motor and the speed reducer input. Spring applied, hydraulically released; brakes are automatically set when both travel levers are in neutral or when engine is shut down.

Gradeability — 30% permissible based on efficient engine/gear box lubrication.