Chevrolet 10 1971 Series Chassis Service Manual page 399

If old cable is broken it will be neces­
NOTE:
sary to remove lower piece from transmission
end of casing.
3. Lubricate the lower 3/4 length of cable with speedo­
meter cable lubricant and feed the cable into the
conduit. DO NOT KINK SPEEDO CABLE CASING.
4. Connect the upper end of cable to the speedometer
head, and road test the truck for proper speedometer-
odometer operation.
FUEL GAUGE REPLACEMENT (Fig. 8, 11, 12)
All Except (02) Flat Face Cowl
1. Remove instrument cluster assembly as previously
described.
2. Remove instrument cluster bulb holders, ground
screws, nuts and washers retaining laminated circuit
to fuel gauge rear cover.
3. Remove (3) screws retaining fuel gauge rear cluster
cover.
4. Lift gauge away from laminated circuit and rear
cluster cover.
5. To install, reverse removal steps 1-4 and check
operation of fuel gauge.
Mount insulator strip on fuel gauge studs
NOTE:
first, then resistor, then a nut on each stud, next
the laminated circuit, then a plain washer on each
of two studs holding laminated circuit and finally
a nut on back of the studs that have a washer and
laminated circuit.
Flatface Cowl Models (Fig. 10)
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.
TEMPERATURE INDICATOR LIGHT
10-30 Conventional Cab Models
The temperature indicator circuit consists of two re-
remotely located units, indicator light and sender unit.
The lamp unit is a single red light which indicates an
overheated engine condition.
TEMPERATURE GAUGE REPLACEMENT
Conventional Cab Models (Figs. 8, 11, 12)
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
assembly 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 (Fig. 10)
1. Remove instrument cluster assembly as previously
described in this section.
2. Uncrimp bezel (7 places) and remove bezel.
ELECTRICAL— BODY AND CHASSIS 12-13
3. Remove 2 nuts securing temperature gauge to cluster
case and remove gauge.
4. To install, reverse removal procedure and check
operation of unit.
TEMPERATURE SENDER UNIT REPLACEMENT
All Models
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.
Coolant must have at least 0° F. freeze
NOTE:
protection for temperature sending unit to func­
tion properly.
OIL PRESSURE INDICATOR LIGHT
10-30 Conventional 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 the engine is started, one or more of the following
conditions is indicated:
Low oil pressure
Defective wiring or sender unit
Defective bulb
High engine temperature
OIL GAUGE REPLACEMENT
Conventional Cab Models (Figs. 11, 12)
1. Disconnect battery ground cable.
2. Disconnect oil pressure and air pressure (if so
equipped) gauge feed pipes.
Oil pressure line conn, may leak oil
NOTE:
when opened; wrap with cloth.
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 relaced and remove gauge from cover.
Installation
1. Install gauge to cover with retaining nut and pipe
fitting.
2. Reinstall gauge in instrument cluster housing. Install
retaining screws.
Make sure printed circuit edge is not
NOTE:
pinched between cover and cluster housing.
3. Reconnect feed lines to gauge(s). Connect battery
ground cable.
Flatface Cowl Models
1. Remove instrument cluster assembly as previously
described in this section.
2. Uncrimp bezel (7 places) and remove bezel.
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
10-30 CHEVROLET TRUCK SERVICE MANUAL