Chevrolet LIGHT DUTY TRUCK (SERIES 10-35) Service Manual page 17

0B-10 MAINTENANCE AND LUBRICATION
Oil Change
(Interval-Miles)
24.000 Normal On-Off Road
12.000 Heavy Duty Work, Trailer Towing, Snowplowing, etc,
1,000 Severe Usage; Heavy Mud, Mining, Sand Dunes, etc.
Severe Usage w ith Transfer Case Submerged.
Daily
Fig. 0B -9~Transfer Case Lube Interval
Front Axle
The front axle should be checked at the interval and
refilled with SAE 80W-90 GL-5 gear lubricant when
necessary. With the differential at operating temperature fill
to the level of filler plug hole. If differential is cold, fill to
level of 1/2 inch below the filler plug hole.
Propeller Shaft Slip Joints
Propeller shaft slip joints should be lubricated at the
interval with water resistant EP Chassis lubricant which
meets General Motors Specification G M 6031M.
Constant Velocity (C/V Joint)
A C/V joint (Fig. OB-10) is located at the transfer case
end of the front propshaft and must be lubricated at the
interval with water resistant EP Chassis lubricant which
meets General Motors Specification G M 6041M. See the
illustration showing how the fitting may be lubricated from
above the C/V joint, with a special adapter on the end of
a flex hose.
A-6 Oil Filter
Refer to item A-3 for oil filter recommendations.
A-7 Tires
Inspection and Rotation
Front and rear tires perform different jobs and can
wear differently depending on the types of roads driven,
driving habits, etc. To obtain maximum tire life inspect and
rotate tires regularly. (Fig. OB-11) If the truck is equipped
with tires having different load ratings between the front
and the rear, the tires should not be rotated front to rear.
Vehicle handling could be adversely affected and the tires
having the lower load rating could be overloaded.
CAUTION: Before
LUBE FITTING
(K -1 0 & 2 0 M O D E L S )
Fig. 0 B -1 0 -C /V J o in t Lube Fitting
LIG H T D U TY T R U C K SERVICE M ANUAL
Type of Operation
installing wheels.
(K -3 0 M O D E L S )
0 0 r0
0 [ E R f r ,
4 W H EEL
RO T A T IO N
R O T A T IO N - B IA S
A N D B IA S - B EL T E D
"Do not include "temporary use on ly" spare tire in rotation.
Fig. OB-1 1-T ire Rotation
remove any build up of corrosion on the
wheel mounting surface and brake drum
or disc mounting surface by scraping and
wire brushing. Installing wheel without
good metal-to-metal
mounting surfaces can cause the wheel
nuts to loosen, which can later allow a
wheel to come off while the vehicle is
moving, possibly causing loss of control.
Dual Tire Operation
The outer tire of a pair on dual wheel installations
generally wears faster than the inner tire, if this occurs,
reverse position of the tires to equalize wear and achieve
optimum tire life.
In addition, when trucks are driven continuously on
high crown roads, an increase in air pressure of from 5 psi
(35 kPa) to 10 psi (70 kPa) in the outside tire of each dual
produces maximum tire life. Be sure not to exceed the
inflation pressure limits shown in the Load and Inflation
Charts in Section 3E.
Wheel Nut Torque
Caution:
Trucks W ith Single W heels:
As soon as possible after installing a wheel-
and at the intervals shown on the chart in the
Maintenance Schedule
nuts with a torque wrench to the correct torque listed on
the chart which follows.
Trucks W ith D u al Wheels:
Have a mechanic tighten wheel nuts with a
torque wrench as stated above for single wheels
, for both front and rear wheels.
truck, or wheel, or fasteners are new, also have the torque
set at the first 100, 1,000, and 6,000 miles (160, 1 600, and
9 600 kilometres). This precaution is necessary because the
clamping system used on this type of wheel in some cases
needs to seat before the fasteners will hold a uniform clamp
load and remain fully tightened.
Refer to Section 3Efor both single and dual wheel nuts
torque.
L g J L g j 1 0
4 W H EEL
RO T A T IO N
R O T A T IO N - R A D IA L
contact at the
have a mechanic tighten wheel
, when the
In addition