Chevrolet Light Operator's Manual page 92

Hydrovac
The Hydrovac unit is equipped with a lubrication
plug in
the closed end of the shell approximately
:Ih"
from the bottom
of the cylinder. One ounce of Bendix Vacuum Cylinder Oil
or Delco shock absorber fluid should
be added at 10,000 mile
intervals or each six month period, especially prior
to
the start
of cold weather.
This oil is necessary to facilitate oiling of the vacuum piston
leather. Oiling of the leather is necessary
to
prevent piston
drag and possible bending of the piston rod.
Steering Gear Lubrication
The
steering
gear is filled at the factory with
an
all-season
gear lubricant. Seasonal change of this
lubricant is unneces-
sary and the housing should not be drained. Whenever re-
quired, additions should be made
using
steering gear lubri-
cants marketed by many oil companies, "Multi-Purpose" gear
lubricants
as
recommended for rear axle and transmission may
be
used. •
The pipe plug
is installed
at
this point
to
prevent over-
lubrication, generally occasioned by the use of a pressure gun.
Over-lubrication of this unit might result in forcing lubri-
cant up the steering gear
tube
to
the hom button and steer-
ing
wheel.
Steering Column Manual Shift Mechanism
Ih Ton and
3,4
Ton Models
This mechanism,
lubricated
at the factory, is well
pro-
tected and shoulCi not require further lubrication.
However, should the shifting effort become noticeably
greater, remove the cap on the gearshift control box
and fill
box with a soft smooth grease.
General Note
Cab-Over-Engine trucks are provided
with
removable Boor
pans and Forward Control units have a removable engine com-
partment lid for easy access to the engine compartment.
To lubricate the C.O.E. generator front and rear bearm' g s,
standpipes are provided which are readily accessible after
raising the hood.
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