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Newage PRM
Marine Transmissions - PRM150 |
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PRM150 |
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The
PRM150 marine gearbox is purpose built for
use with both pleasure craft and commercial
boats. |
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PRM150 Nominal Power Ratings |
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Pleasure:
2.1 BHP (1.6kW) per 100
rev/min operating speed. |
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Commercial:
1.5 BHP (1.1kW) per 100
rev/min operating speed. |
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Maximum input speed : 5000 rev/min intermittent,
4500 rev/min continuous |
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Note: These
powers have been measured at the engine
flywheel. Ratings have been established to
ensure the long trouble free life of the
gearbox which should not, therefore be used
at powers in excess of those shown. |
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PRM150 -
Full Hydraulic Operation - Lightweight,
Compact & Rugged |
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The PRM150 marine gearbox is
purpose built for use with
both pleasure craft and
commercial boats; its twin
countershaft design provides
separate oil-operated
multi-disc clutches (which
need no adjustment) for
ahead or astern drive
allowing full rated power to
be transmitted continuously
in either direction.
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The reduction ratios offered
(1.53:1. 2.09:1 and 2.82:1)
are all available for
left-hand or right-hand
propeller rotation in
"ahead", making PRM150
particularly well suited to
twin engine installations.
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The heavy duty aluminum
alloy gearcase is internally
ribbed for rigidity and
strength and consists of two
separate halves to
facilitate servicing.
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The hydraulic operating
system functions on normal
multigrade engine oil,
avoiding the need to use
automatic transmission
fluid, and ensures rapid
response to movements of the
operating lever for good
boat handling. The operating
lever has a positive neutral
detent and is suitable for
use with proprietary single
lever remote control
operating systems.
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Robust and reliable, the
hydraulic system is
nevertheless provided with a
mechanical lock up device
for added security, so that
in the unlikely event of a
hydraulic failure the boat
can be brought safely back
to port. Access to this
device is via the detachable
manifold on the rear of the
gearcase which also houses
the hydraulic control valve.
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PRM150 -
Service Classification Definitions -
Pleasure |
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Limited to craft used
exclusively for pleasure
boating; operation at full
engine throttle should not
exceed 5% of total time,
with balance of usage at 90%
of full throttle engine
speed, or less. Maximum
operation 500 hours per
year. The selection of
PRM150 according to this
classification for any
commercial boat is not
approved by PRM Marine Ltd.
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PRM150 -
Service Classification Definitions -
Commercial |
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PRM Marine Ltd recommends
that when considering the
PRM150 in boats of whatever
hull form used in commercial
applications, and
semi-displacement hull boats
for pleasure applications,
these boats should be
classed as commercial duty
and the gearbox selected
accordingly
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Important to
Note: |
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It is essential for the
engine, transmission model,
reduction ratio and
propeller size to be
correctly matched so that
the engine can attain its
rated speed appropriate to
the relevant service
classification without
labouring.
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It is also necessary to
ensure the torsional
compatibility of the
complete propulsion system
from engine through to
propeller, since
disregarding this may result
in gear noise, particularly
at low speed operation, and
may even result in damage to
the engine as well as the
transmission components.
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Trans Atlantic Diesels will
provide all possible
information and assistance
to help find solutions to
potential torsional
problems, but it is the
ultimate responsibility of
the person assembling the
drive and driven equipment
to ensure that they are
torsionally compatible.
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Back to
Newage PRM Marine Transmissions |
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