DETROIT DIESEL
Engine Equipment
WARNER MARINE GEAR
may be made at any speed; however, it is advisable to
The Warner hydraulic marine gear assembly consists
shift at low speeds, below 1000 engine rpm, to avoid
of a hydraulically operated multiple disc clutch in
damage to the engine, reverse gear or shaft.
combination with a hydraulically actuated reversing
gear train, an oil pressure regulator, an oil sump
The marine reverse and reduction gear is lubricated by
independent of the engine oil system and an oil cooler
pressure and splash. The quantity of oil in the marine
mounted on the engine.
gear will vary with the inclination of the engine and
must be properly maintained to the full mark on the
Oil pressure for the operation of the marine gear is
dipstick to ensure satisfactory operation,
provided by an oil pump incorporated within the gear
housing and driven continuously while the engine is
It is recommended that vessels utilizing a marine gear
running. The oil is delivered under pressure from the
have a suitable locking device or brake to prevent
pump to a combination marine gear control valve and
rotation of the propeller shaft when the vessel is not
pressure regulator valve.
under direct propulsion. If the marine gear is not in
operation and the forward motion of the vessel causes
The pressure regulator valve maintains constant
the propeller shaft to rotate, lubricating oil will not be
pressure over a wide speed range and the control valve
circulated through the gear because the oil pump is
directs the oil under pressure to either the forward or
not in operation. Overheating and damage to the
reverse piston cylinder. The operating oil pressure
marine gear may result unless rotation of the propeller
range for the marine gear at operating speed is 120 to
140 psi (827 to 965 kPa) and the maximum oil
shaft is prevented.
temperature is 225 F (107" C). Minimum oil pressure
Consult an authorized Detroit Died Allison Service
is 100 psi (689 kPa) at idle speed (600 rpm).
Outlet for major repairs or reconditioning of the
Shifting from forward to reverse drive through neutral
marine gear.
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