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 691 of 894
TRUCK SERVICE MANUAL
DESCRIPTION AND OPERATION
piston.
Six are internal-splined clutch plates and seven
are external-tanged clutch plates.
The external-tanged
plates are held stationary by the adapter housing, while
the internal splined plates are free to rotate.
The piston
for each model is positioned in its respective bore and
retained there by 28 piston return springs, the return
spring retainer, four retainer rings and a snapring.
c. Operation (A, foldout 15)
(1)
When the low clutch is released, internal-
splined clutch plates 15 are free to rotate.
Since low
planetary ring gear 14 is splined to internal plates 15, it
will also rotate freely.
(2)
When hydraulic pressure is directed to the
back side of low piston 6 (A, foldout 15), the piston c o m
presses clutch plates 15 and 16 together.
This locks
rotating internal-splined plate 15 to stationary external-
tanged plate 16, preventing ring gear 14 from rotating.
(3)
With the application of the forward or
fourth clutch in conjunction wit h the low clutch, a
reaction within the planetary gearing will produce either
forward or reverse rotation, respectively, at the output
shaft.
2-17.
PLANETARY GEARING
a. Description (A, foldout 13)
(1)
The planetary gearing i s composed of a
gear unit and main shaft assembly (A, foldout 13), the
low planetary carrier assembly 18 (A, foldout 15) and its
sun gear and ring gear.
(2)
The gear unit and main shaft assembly (A,
foldout 13) contains three planetaries called front, center
and rear, so designated because of their location i n
relation to each other in the gear unit.
(3)
Each of the three planetaries has a sun
gear and a ring gear, which are interconnected by the
main transmission shaft and a connecting drum.
(4)
The low planetary gear set is located
behind the gear unit and main shaft assembly.
Re f e r
to figure 2-9.
It contains a sun gear, a carrier assembly,
and a ring gear.
The sun gear is splined to the main
shaft, and the rear carrier is splined to the low ring gear,
thereby interconnecting the four planetary systems.
(5)
This interconnection of the planetary input,
reaction, and output elements and connections with the
forward and fourth clutches produces five forward
speeds and one reverse speed.
b. Operation (A, foldout 13)
(1)
The front planetary assembly 5, used in
conjunction with the center planetary assembly 16,
produces third gear when the forward and second
clutches are applied (fig.
2-11).
(2)
The center planetary is active in third,
fourth, fifth and reverse gears.
(3)
The rear planetary carrier assembly 38, is
required in second, third, fourth and fifth gears.
In
second gear, with the application of forward and first
clutches, it singularly transmits torque, at a reduction,
through the low carrier to the output shaft (fig.
2-10).
In
third, fourth and fifth gears its only function is in the
transmitting of torque through the low carrier to the
output shaft.
(4)
The low planetary carrier assembly 18 (A,
foldout 15), is used in all gears.
In first gear, torque is
transmitted through the main shaft to low sun gear and
then to the low carrier assembly.
With the application of
the forward and low clutches, the torque is then
transmitted by the carrier, at a reduction, to the output
shaft.
In reverse gear, torque is transmitted through the
fourth clutch housing, sun gear shaft assembly 23 (A,
foldout 13), center carrier assembly 16 and main shaft
assembly 34 to the low sun gear and carrier.
With the
application of fourth and low clutches, the torque is then
transmitted by the carrier, at a reduction, to the output
shaft (fig.
2-14).
NOTE
In fifth gear, because both the forward
and fourth clutches are engaged, all four
planetaries rotate as a unit.
This gives
direct drive through the transmission.
684
TRANSMISSION
Back to Top
