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Newage PRM
Trolling Valve |
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PRM
Trolling Valve |
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The Trolling Valve Kit
Comprises:
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Trolling valve
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Operating lever
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Connecting electrical cables
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Mounting brackets
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Pipework
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ON/OFF switch and filter
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The trolling
valve enables low propeller speeds to be
obtained by the use of an electrically
controlled pressure reducing valve in the
clutch pressure operating circuit. It also
avoids the use of special oils for the
gearbox when fitting the trolling valve.
All
PRM units except PRM120/150 can be supplied
with a factory fitted trolling valve, also a
kit containing all necessary parts for
operation and control is available for
retro-fitting. |
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The trolling
valve block is of aluminum alloy housing the
on/off and pressure reducing solenoid
valves. The solenoid valves are hermetically
sealed and supplied with DIN 43650 type
connectors. (Figure 1 of the circuits and
assembly diagrams shows the basic circuit
diagram - this is available to download at
the bottom of this page).
When
using the trolling valve it will be
necessary to change the control valve spool
MT4656 with MT1538, This is provided in the
kit.
The operating lever is a Morse type NB unit
with locking handle. The housing contains
the electrical circuits for operating the
trolling valve which again are encapsulated
to provide a waterproof seal. The lever is
complete with: |
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P3 meters 6 core cable to
provide the solenoid and
interlock switch connection
via a multipin plug;
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2 meters 2 core cable to
provide the 12V or 24V
supply;
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1 meter cable with spade end
connections to the on/off
switch.
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An ON/OFF switch and two
meters of multicore cable
with DIN 43650 solenoid and
6 pin plug to connect to
lever cable. Additional
three meter lengths of
cables can be supplied if a
longer run is required.
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Pipework, brackets and
in-line filter are also
provided to enable
connections to be made to
the gearbox
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The trolling valve is connected
as shown in figure 1 of the
circuits and assembly diagrams
(available for download at the
bottom of this page) and
operates as follows:
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Depressing the ON/OFF switch
causes the hydraulic oil to
flow through the pressure
reducing valve and by
varying the position of the
control lever the clutch
pressure is increased or
decreased with an associated
increase or decrease in
clutch slip.
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Movement of the control
lever only affects clutch
pressure when the ON/OFF
switch is activated and
ensures the unit is failsafe
in the event of an
electrical failure.
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During trolling the head of
the switch is illuminated to
give a visual indication of
the valve status.
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The ON/OFF solenoid is
equipped with a manual
operation which can move the
valve spool in the event of
a mechanical failure.
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An interlock facility is
provided in the form of an
electrical connection which
can be wired to a
microswitch on the fuel rack
to switch off the trolling
circuit if the engine speed
rise above 1200 r.p.m.
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Back to
Newage PRM Marine Transmissions |
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