Arnold Company

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Railcar Opener Accessories

Drive Bit - Hopper Gate Opener Accessory
Drive Bits

Part #: ARN-AD06
Price (ea): $196

Will fit most models of door openers including our line of Door Demons. The ARN-AD06 drive bit has a total length of 6″. The width goes from 1″ to 1 1/2″ at a depth of 4″. This is important as many cars only allow a 4″ insertion. This bit has retaining holes on both axes to accommodate all makes of door openers that use the 1 1/2″ square drive.

Extension Shaft - Hopper Gate Opener Accessory
Extension Shafts

Part #: DD 26″, DD 36″, DD-CUSTOM
Prices Starting at: $320

We can manufacture a custom length shaft for your Door Demon®. Standard lengths of 26″ and 36″ are $320.  Any custom length (less than 26″ or more than 36″) are $400.  The maximum length we recommend is 48 inches (4 feet).

If you need a custom-length shaft, use the contact us form and indicate (in the comments field) the length you require. See above graphic for instruction on how to ascertain the shaft length you require or call us today.

Capstan Socket - Hopper Gate Opener Accessory
Capstan Sockets

Part #: ARN-0072
Price (ea): $245

Our replacement capstan socket has a square drive hole perfect for all types of door openers, not only the Door Demon®. The capstan socket is used when the square drive on the railcar is worn to the point at which a square tool will no longer open the door. The socket slides over the capstan and is pinned in place with a 1-inch pin to transfer the opening torque. The over-sized tube design and square drive hole make the socket usable on almost any door and opener combination on the market.

Hydraulic Pressure Testing Kit - Hopper Gate Opener Accessory
Pressure Testing Kit

Part #: ARN-0273
Price (ea): $180

This Hydraulic Pressure Tester Kit will allow you to easily check the pressure of your Door Demon railcar opener. This is important when diagnosing performance issues or setting pressure after replacing key hydraulic components such as the hydraulic pump. The kit comes completely assembled and is designed to easily plumb up to existing Door Demon fittings and hoses.
Protective Cover - Hopper Gate Opener Accessory
Protective Cover
for Two-Wheel Openers

Part #: ARN-0226
Price (ea): $75

Our all-weather Door Demon® cover helps protect your hopper gate opener from environmental damage while the unit is not in use. It is made of durable canvas and features reinforced seams for added protection. This cover is fit for use with any of our two wheeled hopper gate openers (with or without the side-shifting wheels option).

Hatch Key Pry Bar
“Hopper Popper” Pry Bar
(heavy-duty model)

Part #: ARN-0326
Price (ea): $296

Save your back and your fingers. Stubborn hatch covers yield to the leverage in our specially shaped bar.

Worker should be secured to fall protection cable while using our “Hopper Popper” Pry Bar.

Air Line Filter - Accessory
Air Line Filter

Part #: ARN-0197
Price (ea): $193
Lead Time: In Stock/Ready to Ship

Filtering the air removes dust and other contaminants from the supply line.  This auto-drain, 5 micron filter, when combined with a lubricator, extends the operational lifetime of the tool, unit, or vibrator while maintaining its performance parameters.  Works with our Rhino Railcar Vibrator Lifter as well as our pneumatic (air) powered hopper gate railcar openers.

Air Line Filter - Accessory
Air Line Lubricator

Part #: ARN-0003
Price (ea): $165.50
Lead Time: In Stock/Ready to Ship

Lubricating the air line limits the chance of the internal parts from seizing inside the body of our pneumatic units and vibrators. A lubricator, when combined with a filter, extends the operational lifetime of the tool, unit, or vibrator while maintaining its performance parameters.