21000 Manitowoc crane - load chart, specs & dimensions (2005 - 2018)

Operator’s cab

Fully enclosed and insulated steel module is mounted at left front corner of rotating bed on a pivoting frame that permits cab to be repositioned for transportation or tilted for increased upward visibility. Module is equipped with sliding door, large safety glass windows on all sides and roof. Signal horn, cab space heater, front and roof windshield wipers, dome light, sun visor and shade, fire extinguisher, air circulating fan, and air conditioning are standard.

Epic

Manitowoc’s field-proven Electronically Processed Independent Controls (EPIC) system delivers high productivity and precise load control by instantly matching an operator’s commands to the crane function. EPIC’s microprocessor maximizes a Manitowoc crane’s function capability and simplifies servicing by pinpointing any problem in the crane’s engine, power transmission and other operating systems. In addition, EPIC increases versatility by easily tailoring a Manitowoc crane’s operation for specialized applications, with or without attachments. EPIC is a key reason no other crane can match the performance and reliability of Manitowoc.

Hydraulics

Our closed-loop system provides a separate hydraulic circuit to power each crane function and increase productivity. The result is truly independent variable-speed operation of the swing, load hoist, boom hoist and travel functions.

Controls

Modulating electronic-over-hydraulic controls provide infinite speed response directly proportional to control lever movement. Controls include Manitowoc’s exclusive EPIC Electronically Processed Independent Control system providing microprocessor driven control logic, pump control, on-board diagnostics, and service information. Block-up limit control is standard for hoist and auxiliary lines. Integrated Rated Capacity Limiter system (RCL) is standard for main boom. “Function cut-out” or “warning only” operation is selected via a keyed switch on the RCL console. Includes travel and swing alarms.

Hydraulic System

Twelve high-pressure piston pumps, driven by a multi-pump transmission, provide independent closed-loop hydraulic power for the hoisting drums, mast hoist, boom hoist, swing, and crawlers.

Drums

Basic crane is equipped with front and rear hoist drums, each 1 780 mm (65-1/2") wide, 660 mm (26") diameter, and grooved for 32 mm wire rope. The front drum is mounted on the front section of the rotating bed, while the rear drum is mounted on the rear section. Each end of each drum is driven by a variable-displacement hydraulic motor and a planetary reduction gear box equipped with a bi-directional brake. A drum rotation indicator is standard for each drum, and hoists include 32 mm wire rope.

Boom hoist

The independent boom hoist, mounted in the mast butt, has a grooved drum that is 1 397 mm (55") wide and 787 mm (31") in diameter. This drum is powered by two variable-displacement hydraulic motors coupled to integral brakes and planetary reduction gearboxes. Standard features include a ratcheting pawl, rotation indicator, pressure roller, and wire rope for reeving a 20-part boom hoist line.

Swing system

The high strength fabricated steel alloy rotating bed is mounted on a 3.40 m (11’ 2”) diameter triple-row roller bearing. The rotating bed consists of front and rear sections joined with FACT™ alignment, four power-actuated pins, and an H-FACT™ hydraulic quick coupler system. The front section is equipped with a hoist drum and the power plant, while the rear section includes a second hoist drum, gantry, and mast hoist. Independent swing is powered by two swing drives, each composed of a fixed-displacement hydraulic motor coupled to a planetary reduction gearbox with an internal brake. A 360° positive swing lock is standard, and the swing system has a maximum speed of 1.0 rpm.

Boom support system

The 8.5 m (28’) long retractable gantry provides the geometry to raise the stationary mast. The gantry top is connected to the mast-hoist equalizer by 12-part reeving, and the equalizer is connected to the mast top by high-strength steel straps. Additionally, the gantry’s telescoping backhitch is equipped with power actuated locking pins.

Max-er®

The MAX-ER® attachment boosts the 21000’s maximum capacity to 907 metric tons (1,000 tons). Its components include: One 12.2 m (40') No. 81 insert, added to increase mast length to 42.7 m (140'). Two additional swing drives (for a total of four) mounted on the rotating module, with each swing drive powered by a fixed-displacement hydraulic motor coupled to a planetary reduction gearbox and internal brake. A wheeled or hanging MAX-ER counterweight assembly attached to the top of the mast by steel straps and to the rear of the upperworks by shear-frame inserts. The hanging MAX-ER counterweight is 17.9 m (58' 9") or 22.1 m (72' 6") behind the crane’s centerline of rotation, while the wheeled MAX-ER counterweight is 18.0 m (59' 0") or 22.0 m (72' 0") behind the crane’s centerline of rotation. The wheeled counterweight uses large off-road tires, which can be positioned for traveling, crabbing, or swinging, and it also includes hydraulic support jacks and pads.

Carbody

The carbody connects the rotating bed and crawler assemblies. The fabricated steel rotating module is mounted to the carbody module by a 3.4 m (11' 2") diameter triple-row roller bearing. This module is equipped with FACT connectors and powered pins. For a 9.1 m (30') “narrow” stance, crawler beams attach directly to the carbody module, while for the standard 14.5 m (47' 6") “wide” stance, two transverse carbody beams mount to the carbody module, and the crawler beams are then mounted to the transverse beams.