TM 55-1930-209-14&P-1
10-6.5 Bilge pump switches and indicators. Controls for two bilge pumps are on operator's dash. Each pump has a
fuse container, a light Indicating when pumps are working and a three-way pump switch that operates. MAN (manual on)
to the right, OFF in the middle, and AUTO to the left. The three-way switch Is spring loaded to OFF and must be held to
the right to keep pumps working The switch stays In the AUTO position until turned back to OFF. Normal position is
AUTO. Bilge switches bypass master switch so when all electricals are turned off, except battery select switch in engine
compartment, bilge pumps work when automatic float switches activate them. Red warning light glows whenever bilge
pumps are operating.
10-6.6 Outboard drive controls. Two panels on operator's dash indicate and control status of outboard drive. Red
warning light on panel comes on when outboard drive is in TILT range. A series of small green lights indicates position of
outboard drive A toggle switch and a pushbutton control the outboard position.
a.
Push black rubber-covered toggle switch UP to move outboard drive up.
b.
Push that same switch DOWN to move outboard drive down.
c.
Push in on black rubber covered button and then push up on black toggle switch to move outboard drive to TILT
position. Red position light will come on.
10-6.7 Magnetic compass. A four inch, fully gimballed, lighted compass with built-in magnetic compensators Is
mounted in top center of dashboard. An internal compass light comes on when cabin dome light is turned on. Magnetic
deviation set in compass should be verified when boat is moved more than 100 miles east or west of previous location.
10-6.8 Steering pump filler. Filler for hydraulic steering is on top of wheel housing behind wheel. See
TM 55-1930-209-14&P-17, for servicing.
10-6.9 Engine hourmeter. Mounted on the dashboard, the hourmeter records and indicates hours of engine operation.
This data Is used as basis for workboat maintenance program.
10-6.10 Fuel gauge. Mounted on operator's dashboard, the fuel gauge is electrically powered and is turned on when
master switch is turned on. The gauge indicates E for empty on left, F for full on right, and 1/4, 1/2, and 3/4th markings In
between. Gauge does not have a warning light for low fuel condition.
10-6.11 Volvo engine instrument panel. This panel, on operator's dashboard, displays a coolant temperature gauge,
oil pressure gauge, voltmeter, tachometer, instrument warning light cluster, alarm buzzer test button, instrument light, and
light switch.
a.
Temperature gauge, in upper left corner of engine instrument panel, shows closed circuit coolant temperature.
Normal coolant temperature should be between 165 and 195F. When coolant temperature exceeds 195F, left
light in warning light cluster shows red and portrays international sign of a thermometer. Instrument panel alarm
buzzer also sounds.
b.
Oil pressure gauge is in center of three gauges across top of engine instrument panel. Gauge markings indicate
from 0 on the left to 120 psi on the right, with Intermediate marks for 30, 60, 80, and 100 psi. Lower arc of
numbers is for metric measurement of oil pressure. Normal operating temperature for a warm engine should be
between 30 and 100 psi When oil pressure drops too low, second light from left on warning light cluster shows red
with the international sign of an oil can. Instrument panel alarm buzzer also sounds.
c.
Voltmeter gauge is in right corner of engine instrument panel and indicates amount of charging from alternator
into battery or batteries selected with battery selector switch on aft edge of engine compartment. When alternator
ceases to provide a charge to the batteries, third light from the left in instrument warning light cluster glows red
and shows a battery.
d.
Tachometer is in lower left corner of engine instrument panel and indicates engine rpm in 100's Tachometer
indicates up to 5000 rpm and does not show a redline. Warmup Idle speed is normally between 900-1200 rpm.
Normal idle speed is about 600 rpm Normal operating range, depending on load, sea conditions, and propeller, is
between 1000 and 3800 rpm.
10-7
