TM 55-1930-209-14&P-17
2-10.5 Bilge pump switches and indicators. Controls for two bilge pumps are on the workboat instrument panel. Each
bilge pump has a fuse container. A three-way bilge pump switch mounted on the dashboard controls both pump
functions. Switch positions are MAN (manual ON) to the right, OFF in the middle, and AUTO (automatic) to the left. The
three-way switch is spring loaded to OFF and must be held to the right (MAN) to keep the pumps working in this mode.
Normal switch position is AUTO. The three-way switch will remain in AUTO position unless turned to OFF. A red warning
light indicates when the bilge pumps are operating.
Bilge pump switches bypass the master switch and are connected with the battery select switch located in the
engine compartment. This allows the bilge pumps to work on the AUTO switch setting when bilge float switches activate
them and all other electrical power on the workboat has been shut off.
The automatic switch system assures the workboat bilge is always pumped out, even when unattended. It also
extends the life of the bilge pumps and workboat battery by automatically shutting the pumps off when the water has been
pumped out from the bilge.
2-10.6 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 this 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.
2-10.7 Magnetic compass. A four-inch, fully gimballed, compass is mounted on the top center of the dashboard. The
compass is equipped with 45-degree lubber lines, night lighting, and built-in magnetic compensator. Disassembly and
troubleshooting instructions are contained in Appendix B, Manufacturers' Service Manuals/ Instructions.
2-10.8 Steering pump filler. Filler for hydraulic steering is on top of wheel housing behind wheel. See paragraph 2-22 a.
for servicing.
2-10.9 Engine hourmeter. Mounted on dashboard, meter records and indicates hours of engine operation and is used
as basis for workboat maintenance program.
2-10.10 Fuel gauge. Mounted on the dashboard, fuel gauge is electrical and is turned on when master switch is turned
on. Indicates E for empty on left, F for full on right and 1/4,1/2, and 3/4 markings in between. Gauge does not
have a warning light for low fuel condition.
2-10.11 Volvo engine instrument panel. This panel, on the dashboard, displays a coolant temperature gauge, oil
pressure gauge, voltmeter, tachometer, instrument warning light cluster, alarm buzzer test button, and instrument
light and light switch (Figure 2-4).
a.
Temperature gauge, in upper left corner of engine instrument panel, shows closed circuit coolant temperature.
Normal coolant temperature should be between 165 and 195°F. When coolant temperature exceeds 195°F, left
light in warning light cluster shows red and portrays international symbol for 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 symbol for an oil can. Instrument panel alarm buzzer also sounds.
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