Columbus JACK/Regent
2222 S. Third St., Columbus, Ohio 43207-2402 USA
MODEL 179D1100-56
50 TON ALLIGATOR AXLE JACK
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1.0 Introduction
This manual is issued as a basic service and maintenance manual covering the Model 179D1100-56, 50
Ton Alligator Axle Jack manufactured by ColumbusJACK/Regent Corporation, 2222 So. Third St.,
Columbus, Ohio 43207, U.S.A., phone number (614) 443-7492, FAX (614) 445-3981.
To derive maximum service, it is recommended that personnel have an understanding of the equipment
before attempting to operate the jack. It is mandatory that the operating procedures herein be followed.
2.0 Specifications
Capacity 50
Tons
Minimum Height
7.0 Inches
Hydraulic Lift
12.0 Inches
Screw Extension
3.5 Inches
Maximum Height
22.5 Inches
Working Pressure
9,690 PSI
Net Weight (Approx.)
450 Lbs
3.0 Features
ColumbusJACK/Regent’s Model 179D1100-56 is a 50 ton axle jack capable of jacking an aircraft using an
air operated pump or a hand pump. A rain hat is provided to protect the cylinder assembly from the envi-
ronment. An “Evac-U-Tract” air assisted ram retraction system is provided to assist in the retraction of the
cylinder rams when the single release valve is opened. An automatic safety valve is provided to bypass
hydraulic oil from either pump back to the reservoir at 110% of rated vertical capacity. The towbar allows
the jack to be towed at a maximum of 5 mph. All ColumbusJACK/Regent aircraft jacks are engineered to
provide optimum operational and maintenance qualities. Our jacks are designed to withstand hard usage
while the weight is kept at a minimum to facilitate ease of handling.
4.0 Safety
Information
Make sure all personnel involved with this jack read and understand these instructions before
using.
WARNING:
The jack is designed to lift only vertical loads with a maximum weight of 50
tons (100,000 pounds). Do not use jack for lifts exceeding the weight or
design limits. Failure to comply can result in injury or death to personnel
and/or severe damage to the jack and aircraft.
