Tapping into the Tank Line
There are two ways to run the oil back to tank. Perkins does not suggest allowing the return oil to get
pushed back into the packer control valve, because this generates back pressure and heat.
Recommended Method: Locate the return line coming off the packer control valve and find a suitable
large fitting as shown in the photo below. Remove this fitting and drill and tap into it to fit an adapter
(or tee for a double installation) to allow the oil to flow back into the return line.
Be sure to clean the fitting of metal shavings before returning it to the system.
Alternative Method: On some trucks, it is not possible to tap into a return line fitting. It some instances,
everything is hard-piped and there are no fittings to tap into. If this is the case, the return lines may be
feed into the “T” port of the Perkins Diverter Valve. This tends to create some backpressure in the
system, but otherwise does work.
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