The MARCO Model 540 Series of Portable Conveyors incorporate an original concept in design called "MARCO ECS", or "Exact Component Selection". This concept requires that each detailed component, regardless of size, be designed and/or selected for its specific function on one particular size machine (width and length). This "Exact Component Selection" eliminates the common questionable practice of "one tire size (for example) for an entire range of machine sizes". Such practice creates, by necessity, "under-design or over-design,", which is either unsatisfactory  or too expensive. The Model 540 Series of Portables, therefore, are specifically designed by unit size of width and length, to provide maximum efficiency at minimum cost. See Table A.

CONVEYOR FRAME

The MARCO Model 540 Heavy Duty Portable Conveyor incorporates the use of MARCO Series 151 and Series 361 Tubular Trusses, combining the correct amount of each, depending on the width and length of a specific unit.  MARCO Series 151 and Series 361 Trusses are 17" and 39" in depth, respectively. Side Frames are "jig-welded" and are assembled into a box truss by bolt connected wind bracing. For additional and complete details of Series 151 and/or Series 361 Tubular Frames, see Spec Sheets:

Model 151

Model 361

HYDRAULIC UNDERSTRUCTURE (Optional )

Constructed of rectangular structural tubing eliminating angles and/or pockets for material "build-up".  Dual hydraulic cylinders are provided in the forward support. Rods are fully protected within the support structure. Machine may be elevated from minimum angle (See Table A)  to maximum angle of 22^o (standard power is provided for 18^o inclination but, as an option, may be increased to satisfy a requirement for higher angle of operation). Rams are designed for restricted "down-flow" (descent) by use of restrictor valves located within cylinder cap for complete protection.

TOWING HITCH

Heavy duty eye bolt is provided as standard. A manual "lifting jack" (mechanical) is incorporated into tail section of conveyor to raise eye bolt to travel height. A king pin for "fifth wheel" towing is available as an option.

WHEEL AND TIRE GROUP

Spindle, hub, wheel and tire sizes have been carefully selected to satisfy maximum speeds of 5 MPH for off-road travel, 20 MPH for highway travel, and 40 MPH for interstate highway travel.


PULLEYS

Heavy duty, all steel welded type, individually turned and crowned to insure true concentricity with the bore. The entire face of the pulley is machined. Pulleys are equipped with Taper-Lock or QD hubs and bushings

DRIVE PULLEY LAGGING

All Drive Pulleys are lagged with 3 ply, Ruff Top Rubber Lagging, installed in multiple widths to ensure conformity to crowned face. Slide Lagging or Vulcanized Lagging is optional.


IDLERS

Belt Widths 18" through 36" - MARCO Series M15-41/2" dia. rolls. with pre-lubricated ball bearings, requiring no further lubrication.Troughing Idlers are spaced on 4'-0" centers with two extra at the loading point. Return Idlers are spaced on 10'-0" centers.

Belt Widths 42" through 48"-CEMA C-5 5" dia., pre-lubricated roller bearing idlers are furnished as standard. Troughing Idlers are spaced on 3'-0" centers on 42" widths. and 3'-O" centers on 48" widths. Return Idlers are spaced on 10'-0" centers


BELT TAKE-UP

Screw type, acid cleaned and plated. providing ample adjustment.


RETURN BELT WIPER (OPTIONAL)

"Plow type", equipped with gum rubber flashing, and  mounted in front of tail pulley to prevent entrance of material between return belt and pulley. The wiper is integral with the screw take-up, providing fixed relationship between wiper and pulley, regardless of take-up setting.

HEAD END BELT WIPER

Equipped with Double Rubber Squeegee and adjustable tension springs providing constant pressure on belt surface. Mounts under head pulley for greatest efficiency.


ASSEMBLY BOLTS

All the field assembly bolts are acid cleaned and plated.


WALKWAY

Not available on this Model but available on Model 541 Portable.


LOADING HOPPER

The loading hopper is 5 ft. long, 8" in depth. and is designed to assist in appropriately centering material on the belt. It is equipped with adjustable gum rubber flashing to prevent leakage. Hopper length can be extended to any dimension, resulting in continuous side skirts.

Drive includes Shaft Mounted Helical Gear Speed Reducer (gears are enclosed and running in oil). driver and driven sheaves and vee belts. All Drive components are selected to adequately transmit horsepower.  Drive is not removed for transporting. AGMA Class II Duty Drive is also  available-consult factory.


BACKSTOP

A Backstop is provided. Mounts in the reducer and runs in oil.


ELECTRIC MOTOR

1800 RPM,TEFC, Nema Design "C,' Hi-Torque, 3 phase, 60 cycle, 230-460 volt. Motor is not removed for transporting.


OSHA-MSHA GUARDS

Protective Guards, constructed of expanded metal are included as standard on all Model 540 Portable Conveyors. Guards furnished are Head Pulley Guard, Tail Pulley Cage and Vee Belt Drive Guard.


GENERAL OPTIONAL SPECIFICATIONS

Any, or all, of the following "General Optional Specifications" are available on Model 540 Portable Conveyors.


PIN-ABLE UNDERSTRUCTURE

A structural Pin-able Understructure is standard. The Pin-able Understructure is constructed of rectangular structural tubing to reduce material "build-up"' and has welded cross braces. Forward and rear supports are pin connected to bottom chord of conveyor truss. Degree of incline adjustment is accomplished by a "telescoping" forward support, locked into position by pins through the "telescope". Various angles of  incline are available, up to a maximum of 22^o  (standard power is provided for 18^o inclination but, as an option, may be increased to satisfy a requirement for higher angle of operation). 


RETRACTABLE AXLE (OPTIONAL)

A retractable axle is available on all machines having an axle overall-width (OAW) of 10' or 12' dimension (See Table 1). This retractability reduces OAW by 2'0" and is accomplished by "telescoping" and re-pinning into travel or operating position. Not available on machines having an 8'-0" OAW.


SWIVEL WHEEL ASSEMBLY (OPTIONAL)

Provides for partial rotation of both wheel assemblies into a radial position for stockpiling of materials and/or bin charging. The swivel wheel assembly requires additional overall-width (OAW) of 2'-0" for trailing. Included with this swivel wheel assembly is a tail pivot assembly, also required to accomplish radial movement. This swivel wheel assembly is not available if machine is equipped with dual tires.


WIDE PROFILE AND DUAL TIRES (OPTIONAL)

Wide Profile Tires are available, as an option, in place of standard single pneumatics. Wide Profiles provide larger bearing areas to improve operational efficiency on loose materials. Dual tires are also available.

POWER PROPELLING MECHANISM
(for radial travel - OPTIONAL)

Drive includes TEFC Motor, and Enclosed Gear Reducer with "soft- start" coupling. Roller chain and sprocket drive and forward-reverse "dead-man" push button is provided. Starter is not included.


POWER RAISING OPTIONAL

Power Raising is available as replacement for pin-able understucture.


ENCLOSED TAIL SECTION

The standard open truss is "plated" to totally enclose the tail section. This enclosure prevents entrance of material into the section, or around the tail pulley.


KING PIN HITCH (OPTIONAL)

A King Pin arrangement is available, as an option, and replaces the standard eye bolt. The King Pin Hitch is designed to work in conjunction with a "fifth wheel" on towing tractor.

OTHER GENERAL/OPTIONAL SPECIFICATIONS AVAILABLE

• Idler Spacing
• Impact and/or Self-Aligning Idlers
• Self-Cleaning Tail Pulley
• Wind Guards
• Alternate Belt Specifications
• Special Voltages (consult factory)
• Conical Hopper
• Charging Hopper
• Return Belt Wiper
• Power Raising
• Retractable Axle
• Swivel Wheel Assembly
• Wide Profile Tires
• King Pin Hitch