Portable Electric Jacks – Macton portable jacks deliver maximum floor space flexibility, transforming any location that can support substantial floor loading into a potential maintenance or repair area. Not only can a portable system be moved anywhere in the shop, but the individual jacking units in the system can also be independently positioned to adjust easily to a variety of support points on a railcar. Macton portable locomotive jacks operate individually or as a set for lifting locomotives or transit cars. When used as a set, the jacks are synchronized to assure safety and uniform travel among the jacks at all times. The electrically powered, machine screw drive system in the Macton jack is continuously self-locking to provide maximum security during lift operation. Locomotive jacks are complete with rubber-tired wheels and are easily moved and positioned under the vehicle. Jacks are available in capacities from 10 to 50 tons per jack with lifting heights to suit customer requirements. Control systems utilize a programmable controller for integration of safety interlocks and warning systems. Electrical features include upper and lower limit switches, load sensors on the jacking pad, motion control, group, pair and individual operation, and remote control operation.

KEY BENEFITS INCLUDE:

  • The screw on the Macton portable jack is housed inside of the steel column so that it is protected from damage in the shop environment. The front opening is covered with a protection band on the top and the bottom to keep the dirt and debris off of the lifting screw. Our competitors screw is outside of the column and is only protected by a bellow on the top of the screw.

  • The lifting carriage guide rollers on the Macton jack are housed inside the steel column, protecting them from damage.

  • The Macton portable jack bronze lifting nut is followed by a steel safety nut that will hold the load in the event of a bronze nut failure. A nut wear switch monitors the wear of the bronze load nut and will prevent the jack from raising if the bronze nut has worn past the allowable limit.

  • A Human Machine Interface LCD Screen on the primary panel provides troubleshooting information in the event of a system fault. In normal operation mode, this panel may be used to gain information about the lifting system including schematic and program information. If the system faults, the Screen will show an error message to indicate what component has caused the fault.

  • Paired Operation A set of four jacks can operate as a set of four, in pairs or individually by turning a selector switch on the Master control box.

For a full list of features and benefits, click on the tabs below.

Maximum Capacity

35 tons per jack or 140 tons (127 metric tons) per set of 4 jacks 

Minimum Lifting Height

2’-3” (27”) measured from the finished floor up to the top of lifting pad

Maximum Lifting Height

8’-4” (100”) (other ranges available upon request – see below)

Lifting Stroke

6’-1” (73”) (other ranges available upon request – see below)

Lifting/Lowering Speed

9” per minute

Ease of Portability

Wheels at the base are lowered when the jack is in the full down position, to allow an operator to position the jacks manually using the rear wheel with attached handle bar to steer

Jacks may also be moved with a crane using the main lifting lug at the top of each jack and by a fork truck using slots in the base of the jacks

Safety Features

Self-Locking Lifting Nuts – Self-locking screw jacks with bronze nuts are used – the system is designed to be fail-safe so as to support the load in the event of power or mechanical failure (they require power to raise or lower)

Steel Safety Nuts – Screw jacks include a steel follower safety nut, to support the load in the event that the bronze lifting nut fails

VFD with Encoder Counts – Each jack unit has a variable frequency drive and an absolute multi-turn encoder mounted directly on the motor to maintain synchronous lifting and lowering heights of all of the hoist motors in the system.  

Absolute Height Position Sensing – In addition to the encoder system referred to above, upward and downward motion of the lift is also monitored and controlled using an absolute height position sensor with a steel measuring cable that monitors the travel and position of each guide cylinder throughout the entire hoist lifting operation (as well as lowering).

Controls – Mushroom-type emergency stop button shuts down control system when activated; also, “dead-man” type controls make sure the controls require constant pressure to operate; in addition, electrical interlocking of motors exists so that the breakdown of one automatically shuts down power to the other jack motors

Screw Protection

Screw protected by the steel structure surrounding it (eliminates the need for separate protective boots)

Rugged Construction

Heavy duty steel structure coated with one coat of rust inhibiting primer followed by a top coat of yellow industrial grade polyurethane enamel

Dimensions

Jack Height is 10’-9” (129”)

Jack Width is 3’-4.5” (40.5”)

Jack Depth is 5’-3” (63”)

Lifting pad dimension is 6” deep and 8” wide

Clearance distance from the forward-most point on the jack lifting pad to lifting carriage is 13”, and another 5” (18” total) to the main jack column

Weight

Approx. 5,000 lbs per jack

Power Required

480V, 3 phase, 60Hz (other voltages available upon request) Customer to provide matching power receptacle for jacks to plug in to

Motor

7.5 horsepower, NEMA D, 1750 RPM with electromechanical brake

Control System

Each set of four jacks has one master jack and three secondary jacks Control box enclosures are NEMA 12 rated

Master Control Box

Green pilot light to indicate when the control system is on

Dead man type UP and DOWN push buttons 

Two position selector switch to operate the jacks either INDIVIDUALLY or in SYSTEM mode

Two position selector switch to enable PAIR mode operation

EMERGENCY stop push button

Operator Interface panel

Receptacles for control cables and remote control

35-foot power cable

Secondary Control Box

Green Pilot light to indicate when the control system is on

Dead man type UP and DOWN push buttons 

EMERGENCY stop push button

50 or 85 foot interconnecting cables with quick disconnects and an oil resistant jacket are supplied to connect  the secondary jacks to the master jack

Remote Pendant

One (1) NEMA 12 push button pendant with UP/DOWN control is supplied; the pendant plugs into the master jack control panel; individual control of each jack is disabled when the pendant is engaged

Warranty Period

5 years – the most extensive warranty in the industry, demonstrating how

confident we are in the performance and durability of this equipment

O&M Manual

Operation & Maintenance manual in English provided in electronic format

Quality Procedures

All materials and work done on the system are carefully monitored under an ISO 9001:2008 certified program and 100% designed and built in our facility in the United States (we don’t reassemble systems built in other countries); all welding is performed in accordance with ANSI/AWS Structural Welding Code D1.1 standards and is inspected and approved by a Certified Welding Inspector qualified under AWS Section 6.1

Pre-Shipment Factory Testing

Equipment is fully assembled and operationally tested at the factory prior to shipment – at this time, the owner’s representative may, at their option, inspect and dimensionally check the equipment prior to shipment to confirm the owner’s needs are met

Longer Cable Lengths

Added lengths on power or control cables (e.g., 85-foot lengths between jacks)

Onsite Startup & Training

Factory-trained technician provided for onsite startup and training at no added cost (all field labor and travel costs included in equipment price) 

Changes in Lifting Stroke or Overall Jack Height

Changes can be made upon request in either the lifting stroke or the jack height (if the facility has height restrictions, such as an overhead platform) 

Position Encoders

Synchronizes the lifting carriages of all 4 jacks, to ensure that all lifting carriages move at the same speed

Diagnostic Message Display

LED display advises if certain faults have been tripped on the jacks

Warning Lights / Horns

Warning lights and/or horns to advise that equipment is in operation

Lubrication

Automatic grease cup provides screw/nut and lower needle bearing lubrication.  Also includes a sight glass on the gear motor to easily check the lubrication level.

Gearbox Oil for Temperature Extremes

Mobil SHC 630 premium synthetic oil (or its equivalent) used to protect the gearbox from extremes in outside temperature (cold or hot weather)

Heating System

Heating elements in the control box if equipment is used or stored in a cold environment

Control Box Enclosure

NEMA 4 rated box if equipment used or stored in an outside environment

Support Stands

Support stands to allow multiple vehicles to be worked on at one time

Removable Jack Extension

Weldment that temporarily drops onto existing portable jack lifting pad to increase the lifting height of the jacks (i.e., to accommodate rail vehicles with higher jacking pad locations)