If the pressure does not drop to very nearly the same neutral pressure as measured when placing the control in
neutral deliberately, a binding control shaft or dirt between the spool and sleeve of the control valve can be the
cause of difficulty.
If the recentering characteristic as measured above is erratic and if the control feels slightly sticky through most
of the travel, apply the pressure gauge in the OUT line of the Orbitrol. This return line pressure should be
below 30 psi during all periods of normal operation. Check this downstream line to insure that no fittings are
obstructed. If the system uses a return line filter, as in many common power steering pump-tank units, a higher
return line pressure may indicate that the filter needs cleaning.
If you need or wish to accomplish repairs within the unit, use the following procedure for disassembly,
inspection and reassembly.