DMF RW-1016, Parts & Service Manual

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DIVERSIFIED METAL FABRICATORS, INC. RW-1016
© 2017 DMF, Inc. All Rights Reserved. 5-7
5.1.5 Emergency Hand Pump
The emergency pump is provided to allow a malfunctioning vehicle to be removed from the rail
in the event of an electrical fault or pump failure. The emergency hand pump can only be used
to raise the Railgear. It is not designed or intended to deploy the Railgear.
Location
Location of the emergency hand pump is an important consideration. The mounting location for
the emergency hand pump should meet the following requirements.
 The hand pump should be readily accessible and offer enough room to install and
operate the included handle.
 The hand pump should be securely mounted to a part of the vehicle that will withstand
vigorous pumping. Common locations include bumper brackets, cargo boxes, etc.
 Hand pump and selector switch should be installed within easy reach of each other, as
they must be operated simultaneously.
 If the hand pump is mounted far away from the primary hydraulic pump, longer hoses to
connect the two may need to be fabricated, and wiring on the selector switch extended.
 Verify the handle for the hand pump is stowed in a location where it will be readily
accessible and not discarded.
Assembly & Priming
Assemble the hand pump units as shown in Figure 5.1.1 below. The emergency hand pump
must be primed and tested after initial installation. It must be re-primed and tested after any
components of the hydraulic system are removed or replaced. Failure to do so may render the
hand pump inoperable. The following procedure is one method of priming that DMF has found
to be quick and effective.
Loosen the hose connected to emergency hand pump inlet port (port 1) slightly, such that air
can bleed from the line. Activate the hydraulic pump and cycle the Railgear cylinders. There is
sufficient back pressure in the tank return line to force air out of the hand pump inlet line.
When oil begins to escape from the connection stop activation of the cylinders, and re-tighten.
Check operation of the emergency hand pump. You may have to cycle the hand pump several
times before the pump will work throughout its full range.
Figure 5.1.1 Emergency Hand Pump