Chevrolet 70 1969 Series, Shop Manual

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6V-53 DIESEL ENGINE 6C-8
erly hooked; i.e., one end hooked around the con­
trol tube lever and other end hooked around ad­
jacent control tube bracket. Tighten bracket to
head bolts with universal socket and torque to 10
to 12 foot-pounds.
8. Try operating the injector control tube to
determine if return spring rotates tube back to
"No-Fuel" position after tube is manually moved to
"Full-Fuel" position. If there is binding present,
strike the control tube brackets lightly with soft
hammer to correct any misalignment of tube
bearings.
9. Referring to figures 6 and 7, install fuel
rod through opening in top of governor housing;
pass rod through hoses, clamps, and tubular cover
(used at left-hand head). Attach fuel rod to governor
lever with screw (3, fig. 7) inside governor hous­
ing. Install governor housing cover with new gas­
ket. Assemble hose and clamps to secure fuel rod
cover.
10. Install fuel link between fuel rod and lever
on control tube. Link is pinned to lever and se­
cured to rod by nut (fig. 6).
11. Connect fuel line at fitting at rear of left-
hand cylinder head.
12. Use new gasket and mount thermostat
housing on front of cylinder head.
13. Use new gasket and install exhaust mani­
fold. Tighten manifold stud nuts to 25 to 40 foot­
pounds.
14. Connect exhaust pipe. Fill cooling system
and check for leaks.
15. Refer to "Engine Tune-up" covered pre­
viously in this section and adjust exhaust valve
clearance. Referring to pertinent portion of E N ­
GIN E F U E L S Y S T E M (SEC. 6M) for instructions,
set injector timing.
16. Start engine and operate until normal
operating temperature is reached, then recheck
cylinder head bolt torque and make final check of
exhaust valve clearance.
17. Install rocker arm cover on cylinder head,
using new gasket.
ENGINE OIL PAN REPLACEMENT
The oil pan, attached to the bottom of the en­
gine, is made of pressed steel. A one-piece oil pan
gasket is used.
1. Remove the drain plug and drain the engine
lubricating oil.
2. Detach the oil pan; take precautions to avoid
damaging the oil pump inlet pipe and screen. If
desired the inlet pipe assembly and gasket can be
readily replaced.
3. Remove the oil pan gasket completely, then
clean flange surfaces.
4. Clean the oil pan with a suitable solvent;
dry the oil pan.
5. Inspect the oil pan for large dents or breaks
in the metal which may necessitate its repair or
replacement. Check for misaligned flanges or rais­
ed surfaces surrounding bolt holes by placing the
pan on a surface plate or other large flat surface.
6. When replacing the pan, use a new gasket
and tighten the bolts evenly to avoid damaging the
gasket or springing the pan.
7. Install the oil drain plug. Replenish crank­
case lubricating oil.
CRANKSHAFT PULLEY AN D FRONT
OIL SEAL REPLACEMENT
R E M O V A L
1. Remove the radiator core with attached
radiator shell assembly as directed in S H E E T
M E T A L (SEC. 11).
2. Remove drive belts from crankshaft pulley,
then remove pulley attaching bolt and flat washer.
3. Remove pulley from crankshaft as follows:
a. Reinstall the pulley attaching bolt only.
Make sure bolt is tightened firmly.
b. Using puller tool J-4794-01 or equivalent,
pull the pulley from crankshaft. N O T E : Two
tapped puller holes are provided in the pulley for
this purpose.
4. Using a small bit, drill two diametrically
opposite holes in the oil seal casing.
5. Thread two sheet metal screws with a flat
washer on each one into holes in seal, then using
two small pry bars under the washers, force the
seal assembly outward from front cover.
IM P O R T A N T : Be careful not to damage the
seal surface on crankshaft.
IN S T A L L A T IO N
1. Carefully clean any old sealant from bore
in front cover.
2. Apply thin coat of sealant to outer diameter
of new seal assembly. Also, apply a coat of clean
grease to lip of oil seal.
3. With the lip of seal pointed toward engine,
start seal assembly into bore of front cover. Using
a hollow tube as a driving tool against outer diam­
eter of seal, tap the seal assembly evenly until
flush with the outer face of front cover.
4. Start the pulley straight and true on crank­
shaft.
N O T E : A special installer tool No. J-7773-1
and 2 can be used to install pulley or an improvis­
ed tool consisting of a 3/4"-16 x 4 " bolt and a flat
piece of bar stock with a center hole can be used.
Bar stock length should be slightly longer than
diameter of pulley.
5. After pressing pulley on crankshaft, in­
stall attaching bolt with flat washer to 200 to 220
foot-pounds torque.
6. Install belts, radiator and sheet metal.
CHEVROLET SERIES 70-80 HEAVY DUTY TRUCK SH O P MANUAL