557-7669
18″ Dia. Purple Derail Target, UPRR STD DWG 2100
An 18-inch purple, double-sided derail target identified by Aldon for Union Pacific Standard Drawing 2100 and part number 557-7669.
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Aldon equipment
One-Way “Left Throw” Hinged Derail with Manual Lift Sign Holder
Model / part 4014-01
A one-way left-throw hinged derail for freight cars and four- or six-axle locomotives.
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A one-way left-throw hinged derail for freight cars and four- or six-axle locomotives. The derail block is raised onto the rail to direct an approaching wheel off the track in an emergency protection application. The blue sign is raised and lowered separately by hand. A compatible lifting lever can assist with moving the derail block.
Features and application limits
- Maximum operating speed: 10 mph.
- For exposed rail, 90–141 lb/yd, on wooden ties.
- Size the derail to the actual rail height, including the tie plate.
- Six screw spikes are supplied for anchoring.
- Listed height above rail: 2-3/4 in.
Use the current manufacturer instructions and your facility’s procedures for installation, inspection and operation. Ask us to confirm the selected model against your application.
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