TM 5-3805-262-20
1-22. LEFT INSTRUMENT PANEL (CONT)
1. INSTRUMENT PANEL CLUSTER.
Includes warning indicators and following gages: CONV
TEMP, AIR PRESS, FUEL LEVEL, and WATER TEMP.
2. BRAKE ENGAGED INDICATOR.
Connected in series with air activated switch mounted
in port of Parking Brake Control. Switch is normally closed applying ground to
indicator light causing it to turn on. Air pressure supplied to parking brake brake
chamber causes switch to open disconnecting ground to indicator light in turn
causing it to turn off. Resistor (40 ohms,
2 w a t t s ) i n c i r c u i t l i m i t s c u r r e nt
through indicator.
3. ALTERNATOR INDICATOR. Not connected.
4. ENGINE OIL PRESSURE INDICATOR.
Connected in series with oil pressure switch
located in engine cylinder block assembly. Switch is normally closed turning
indicator on. Increasing oil pressure causes switch to open turning indicator off.
Resistor (40 ohms, 2 watts) in circuit limits current through indicator.
5. CLUTCH OIL PRESSURE INDICATOR.
Connected in series with oil pressure switch
installed in transmission. Switch is normally closed turning indicator on. Increas -
ing pressure causes switch to open turning indicator off. Resistor (40 ohms, 2
w a t t s ) i n c i r c u i t l i m i t s c u r r e n t t h r o u g h i n d i c a t o r .
6. CONV TEMP GAGE.
Connected in series with 24 Vdc and temperature sender installed
in transmission. Temperature sender acts as variable resistor varying voltage across
gage . At high temperatures, resistance decreases; at low temperatures, resistance
increases .
7. AIR PRESS GAGE.
Connected in series with air pressure sender installed in air
reservoir port. Air pressure sender acts as variable resistor varying voltage across
gage. At low air pressure resistance is low;
at high pressure resistance is high.
8. FUEL LEVEL GAGE.
Connected in series with fuel level sender installed in fuel
tank. Sender acts as variable resistor varying voltage across gage. When fuel level
is low, resistance is low; resistance increases with quantity of fuel in fuel tank.
9. WATER TEMP GAGE.
Connected in series with engine water temperature sender
installed in engine water manifold. Sender acts as variable resistor varying voltage
across gage. When water temperature is high, resistance is low; low temperature,
r e s i s t a n c e i s h i g h .
10. AUXILIARY STEERING BUZZER AND INDICATOR.
Buzzer and indicator connected across
auxiliary steering motor and pump solenoid. Buzzer sounds warning operator that
primary hydraulic pump is not operating and indicator turns on indicating that
auxiliary steering motor and pump is operating.
11. VOLTMETER.
Connected across ignition key switch accessory terminal and ground.
I n d i c a t e s v o l t a g e o f b a t t e r i e s.
12. WINDSHIELD WASHER CONTROL.
Part of pneumatic system. Pushing control inward
applies compressed air to washer pressure reservoir, which in turn, forces washer
solvent via hoses from washer nozzle mounted in front of windshield.
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