TM-5-3805-254-14-P-2
TRUCK, DUMP, 20 TON, 6X4, ON-OFF HIGHWAY 71,000 GVW, IHC MODEL F-5070 (CCE)
TECHNICAL MANUAL; OPERATOR’S, ORGANIZATIONAL, DIRECT SUPPORT, GENERAL SUPPORT AND DEPT MAINTENANCE MANUAL (INCLUDING REPAIR PARTS INFORMATION AND SUPPLEMENTAL MAINTENANCE INSTRUCTIONS)
JUNE 1980
TM-5-3805-254-14-P-2 - Page 48 of 894
TRUCK SERVICE MANUAL
AXLE-REAR
the same manner as the axle housings.
Completely
drain the lubricant while the unit is warm.
Flush well with
clean flushing oil and thoroughly drain.
Whenever the
inter-axle differential housing has been drained, always
add an additional 2 U.S.
pints of specified lubricant
directly to the inter-axle differential housing.
Some newer model axles have a smaller tapped and
plugged hole located near and below the housing
lubricant level hole.
This smaller hole has been provided
for the use of a lubricant temperature indicator only and
should not be used as a fill or level hole.
Jack up all four wheels of the assembly and run at 25
MP.H.
in high transmission gear for five minutes to
thoroughly circulate the lubricant throughout the
assembly. Be sure brakes are fully released.
TIRES
Measure the rolling radii of all tires.
The tires of all
wheels must be matched to within 1/8" of the same
rolling radius ("’ of the same rolling circumference).
The
4 largest tires should not be installed on one driving axle
and the four smallest tires on the other driving axle of
thruadrive type tandems.
Such tire mounting will cause
inter-axle
"fight,"
unusually
high
axle
lubricant
temperatures
that
result
in
premature
lubricant
breakdown and possible costly axle service.
In addition to matching individual tire rolling radii or rolling
circumference, we recommend matching, as nearly as
possible, the total tire circumference of one driving axle
to the total tire circumference of the other driving axle.
This will usually result in satisfactory tandem axle
lubricant temperatures that lengthen drive unit service
with higher tire mileage.
HOW TO MATCH TANDEM TIRES
The vehicle should be on a level floor, carrying a
correctly distributed rated capacity load.
Be sure all tires
are the same size.
Measure new tires to be sure they
will be correctly matched.
A.
Inflate all tires to the same pressure.
B.
Carefully measure the rolling circumference of each
tire with a steel tape.’
C.
Mark the size on each tire with chalk and arrange
them in order of size, largest to smallest.
D.
Mount the two largest tires on one side of one axle
and mount the two smallest on the opposite side of the
same axle.
E.
Mount the four other tires on the other axle in the
same manner.
F.
Test run the vehicle to get accurate rear axle lubricant
temperature readings on the two axle lubricant
temperature gauges.
G. Vary tire air pressure within the tire manufacturer’s
recommended range, so the lubricant temperatures r
both axles are within 30°F of each other and not i,
excess of 2200F.
This will usually result in uniform tire
loading and good tire life
.
46
Back to Top
