Chevrolet 30 Series 1967 Service Manual page 520

ELECTRICAL—BODY AND CHASSIS 12-20
panel assembly and remove bezel.
3. Pull off plastic caps on terminal nuts and remove
terminal nuts; carefully remove fuel gauge.
To install, reverse removal procedure and check
4 .
operation of unit.
TEMPERATURE INDICATOR LIGHT
10-30 Conventional Cab Models, Chevy Van
The temperature indicator circuit consists of two re­
motely located units, indicator light and sender unit. The
lamp unit is a single red light which indicates an over­
heated engine condition.
TEMPERATURE GAUGE REPLACEMENT
40-60 Conventional Cab Models
1. Remove instrument cluster assembly as previously
described in this section.
2. Remove terminal nuts retaining laminated circuit to
gauge unit.
3. Remove three attaching screws, cover and gauge as­
sembly from cluster housing.
4. Remove terminal attaching nuts and gauge unit from
cover plate.
5. To install, reverse removal procedure and check
operation of unit.
Flatface Cowl Models
1. Remove instrument cluster assembly as previously
described in this section.
2. Uncrimp bezel (7 places) and remove bezel.
3. Remove 2 nuts securing temperature gauge to cluster
case and remove gauge.
To install, reverse removal procedure and check
4.
operation of unit.
Tilt Cab Models
1. Remove instrument cluster as previously described
in this section.
2. Remove eight screws securing cluster bezel to back
panel assembly and remove bezel.
3. Pull off plastic caps on terminal nuts and remove
terminal nuts; carefully remove temperature gauge.
To install, reverse removal procedure and check
4.
operation of unit.
TEMPERATURE SENDER UNIT REPLACEMENT
All Models
1. Drain engine cooling system to a level below unit.
2. Remove sender unit (located in the inlet manifold
near water pump housing on V
cylinder head near an exhaust port on L
and replace with new unit.
3. Refill cooling system and check operation of unit.
OIL PRESSURE INDICATOR LIGHT
10-30 Conventional Cab Models, Chevy Van, Tilt
Cab Models
If the light does not come on when the ignition switch is
turned on, or if the light comes on and remains on after
engines and in the
- 8
engines)
- 6
the engine is started, one or more of the following condi­
tions is indicated:
Low oil pressure
Defective wiring or sender unit
Defective bulb
High engine temperature
OIL PRESSURE GAUGE REPLACEMENT
40-60 Conventional Cab Models
1. Remove instrument cluster assembly and laminated
circuit as previously described in this section.
Remove rear cover retaining screws, cover and
2.
gauge assembly from cluster housing.
3. Remove pipe fitting and retaining nut and remove
gauge unit from cover.
4. To install, reverse removal procedure and check
operation of unit.
Flatface Cowl Models
1. Remove instrument cluster assembly as previously
described in this section.
Uncrimp bezel places) and remove bezel.
2. (7
3. Remove nut securing oil pressure gauge to cluster
case and remove gauge.
4. To install, reverse removal procedure and check
operation of unit.
OIL PRESSURE SENDER UNIT REPLACEMENT
All Models
1. Disconnect wiring harness connector from sender
unit terminal (located in block above starter on L
engines and at left front of distributor on V
engines).
Remove sender unit using Tool J -
2.
new unit and check operation.
GENERATOR INDICATOR
10-30 Conventional Cab Models, Chevy Van,
Tilt Cab Models
Ignition on, engine not running and telltale light off:
1. Indicator bulb burned out; replace bulb.
Open circuit or loose connection in the telltale light
2.
circuit.
Telltale light stays on after engine is started; refer to
Charging Systems under Engine Electrical, Section
AMMETER GAUGE REPLACEMENT
40-60 Conventional Cab Models
1. Remove instrument cluster assembly and laminated
circuit as previously described in this section.
Remove terminal nuts retaining printed circuit to
2.
gauge unit.
3. Remove three attaching screws, cover and gauge as­
sembly from cluster housing.
4. Remove terminal attaching nuts and gauge unit from
cover plate.
To install, reverse removal procedure and check
5.
operation of unit.
- 6
- 8
replace with
21757,
Y.
6
CHEVROLET TRUCK SERVICE M ANUAL