Chevrolet 70 1969 Series, Shop Manual

Page: 26 / 913

LUBRICATION 0-19
HIGH TEMPERATURE GREASE (SPECIAL)
(SYMBOL “S27” ON CHARTS)
The lubricant indicated by the symbol "S27"
on charts should be a short fiber, non-fluid, sod­
ium soap grease having a high melting point
(500°F.) and having a #3 N .L .G .I. consistency.
MULTI-PURPOSE GEAR LUBRICANT
(SYMBOL “MP” ON CHARTS)
N O T E : The following describes the latest
" M P " lubrication specification.
Multi-Purpose Gear Lubricant, meeting U.S.
Army Ord. Specification MIL-L-2105B and indicat­
ed by the Symbol " M P ” on charts, must satisfac­
torily lubricate heavy duty truck hypoid or bevel
axles, and transmissions, under maximum torque
and speed conditions. It must provide necessary
and suitable load-carrying characteristics to pre­
vent scoring and wear, good stability in storage
and service, and give good resistance to corrosion.
Suppliers should assure these characteristics, and
be responsible for the quality and satisfactory per­
formance of their products.
C L U T C H R E L E A S E BEARING
Mileage interval shown on charts may be al­
tered to meet type of service or driving conditions.
Stop and go (city) driving requires more frequent
use of clutch release mechanism, and consequently
should be serviced at more frequent intervals than
a vehicle which is operating in highway service.
Use extreme caution not to over-lubricate the
bearing, although the interval of application should
not exceed 6,000 miles. Use caution, when applying
lubricant, not to overlubricate or use excessive
pressure, as excess grease may reach clutch fac­
ings and result in serious clutch problems.
Clutch release bearing fitting is accessible by
removing the flywheel or clutch housing inspection
cover. Some vehicles use a grease cup which is
accessible at side of clutch housing.
HIGH TEMPERATURE GREASE (SPECIAL)
(SYMBOL “S28” O N CHARTS)
The lubricant indicated by the symbol "S 28"
must be a water-proof, non-soap, smooth fibre
grease having a #1 N .L .G .I. stable consistency,
and must withstand extended high (500°F.) tem­
peratures. A grease containing Bentonite or equiv­
alent should be satisfactory.
S T O P M A S T E R B R A KE UNIT
At time of assembly after overhaul apply
above lubricant to areas indicated in "A IR B R A K E S "
(SEC. 5B) of this manual.
IM P O R T A N T
The use of proper engine oils and oil
change intervals are your best assurance of
continued reliability and performance from
your Chevrolet engine.
CHEVROLET SERIES 7 0 8 0 H EAVY DUTY TRUCK SH O P M A N U A L