Chevrolet 10 Series 1968, Service Manual

Page: 601 / 713

ELECTRICAL-BO DY AND CHASSIS 12-16
FUEL GAUGE REPLACEMENT
10-60 Conventional Cab Models
1. Remove instrument cluster assembly as previously
described in this section.
2. Remove instrument lamps, ground screws and term i­
nal nuts retaining laminated circuit to fuel gauge
section of cluster assembly.
3. Carefully move the laminated circuit from fuel gauge
area and remove three retaining screws, cover and
gauge assembly from cluster housing.
4. Remove attaching nuts and gauge 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 nuts securing fuel gauge to cluster case and
remove gauge.
4. To install, reverse removal procedure and check
operation of unit.
Chevy Van
1. Remove instrument cluster assembly as previously
described in this section.
2. Disconnect electrical connectors and remove nuts
securing gauge to cluster assembly.
3. Remove gauge from cluster opening.
4. To install, reverse removal procedure and check
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 fuel gauge.
4. To install, reverse removal procedure and check
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 Cow l 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.
4. To install, reverse removal procedure and check
operation of unit.
Tilt C a b M odels
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.
4. To install, reverse removal procedure and check
operation of unit.
TEM PERATURE SENDER UNIT REPLACEM EN T
All M odels
1. Relieve coolant system pressure by loosening radia­
tor cap.
2. Remove sender unit (located in the left cylinder head
on V8 engines, and in the cylinder head rear exhaust
port on L-6 engines). Replace with new unit.
3. Check coolant system level and operation of unit.
OIL PRESSURE INDICATOR LIGHT
10-30
Conventional C ab M odels, C h e v y V an, Tilt
C ab M odels
If the light does not come on when the ignition switch is
turned on, or if the light comes on and remains on after
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 AND/OR AIR PRESSURE GAUGE
REPLACEMENT
40-60
Conventional C ab M odels
1. Disconnect battery ground cable.
2. Disconnect oil pressure and air pressure (if so
equipped) gauge feed pipes.
3. Remove three (3) rear cover retaining screws. Tip
cover and gauge assembly and remove from instru­
ment cluster housing.
4. Remove pipe fitting and retaining nut from gauge
being replaced and remove gauge from cover.
Installation
1. Install gauge to cover with retaining nut and pipe
fitting.
2. Reinstall gauge in instrument cluster housing. In­
stall retaining screws.
CHEVROLET TRUCK SERVICE MANUAL