Chevrolet 70 1969 Series, Shop Manual

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LUBRICATION 0-10
after engine has been stopped for a few minutes.
Remove dipstick, wipe clean with cloth, reinsert
and remove again. The upper mark on dipstick is
" F U L L , " the lower " A D D ." Keep level as close as
possible to " F U L L " mark without overfilling. Do
not operate with level below " A D D ” mark.
On gasoline engines the dipstick is on right
side and engine can be filled at right filler on
valve rocker cover after removing filler cap
(fig. 7).
On tilt cab models, accessibility is through
door behind passenger seat. On other models, dip­
stick and oil filler are accessible when hood is
raised.
ENGINE OIL FILTER
Oil filter element changing periods are closely
related to crankcase oil changing periods, the qual­
ity of oil used, or the severity of the trucks service.
It is recommended that element be changed initially
at first oil change and thereafter at intervals indi­
cated under "Engine Oil Recommendations" for
respective engine.
Location of oil filter is at right rear of crank­
case on 6V-53 Diesel models and at left rear on
gasoline models (fig. 8).
E L E M E N T T Y P E
1. Remove plug in filter shell to drain oil
from filter.
2. Back out center stud and withdraw shell and
stud as an assembly.
3. Withdraw element from adapter or base
and discard.
4. Clean old oil from filter adapter and shell.
5. If filter element spring, retainer or washer
require replacing, remove retainer ring from stud
and withdraw parts. After assembling new parts,
install ring in groove of center stud.
6. Replace old filter housing gasket.
7. Position new filter element carefully on
center stud within the housing and place housing,
element and stud in place on base or adapter.
8. Torque center stud 40 to 50 ft. lbs., being
careful not to damage gaskets. Install drain plug.
DISPOSABLE T Y PE
1. Turn filter from mounting on engine, then
discard assembly.
2. Thoroughly clean mounting at gasket area.
VISCOSITY CHART
r cold w eather, **iec» viscosity b ate d on low est a n ticip ate d temperature,
r ho i w eather, select visco sity bcised o n h igh e st tem perature expected d u rin g
» day.
Figure 5— Gasoline Engine Oil Viscosity Chart
Figure 6 — Diesel Engine Oil Viscosity Chart
CHEVROLET SERIES 70 -80 H EAVY DUTY TRUCK S H O P M A N U A L