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 690 of 894
TRUCK SERVICE MANUAL
HT 700D SERIES TRANSMISSIONS
Para 2 -13/2-14
(4)
Thirteen clutch plates are required for the
second clutch.
Six internal-splined plates are attached to
the splined area on the outside diameter of the front
carrier assembly, and are free to rotate.
The seven
external-tanged clutch plates a re anchored to the
transmission housing and cannot rotate.
(5)
The center support assembly is housed in
the transmission and located by an anchor bolt.
This
insures accurate oil passage hole alignment from the
valve body to the second and third piston cavities.
c. Operation of Third Clutch
(A, foldout 12)
(1)
When hydraulic pressure is directed
through the oil passages in the center support to the
back side of clutch piston 10, clutch plates 3 and 4 are
compressed together.
This locks the fourth clutch
housing to the transmission housing, which prevents the
fourth clutch housing and attached components from
rotation.
clutch in conjunction with third clutch, a reaction within
the planetary gearing will produce a forward rotation to
the output shaft.
d. Operation of Second Clutch
(A, foldout 12)
(1)
When hydraulic pressure is directed
through the oil passages in the center support to the
front side of clutch piston 21, clutch plates 26 and 27 are
compressed together.
This locks the front planetary
carrier to the transmission housing, which prevents the
carrier from rotating.
(2)
With the application of the forward clutch
in conjunction with the second clutch, a reaction within
the planetary gearing will produce a forward rotation to
the output shaft.
2-14.
FIRST CLUTCH (B, foldout 14)
a. Function
(2)
The first clutch has a single function.
Engaged with the forward clutch, it produces second
gear.
b. Description.
The first clutch contain thirteen
clutch plates and a piston.
Six are internal-splined clutch
plates and seven are external-tanged clutch plates.
The
external-tanged plates are held stationary by the
transmission 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
return springs and a spring retainer.
d. Operation (B, foldout 14)
(1) WHEN THE FIRST CLUTCH IS RELEASED
INTERNAL-SPLINED PLATES 2 ARE FREE TO
ROTATE.
SINCE REAR PLANETARY RING GEAR 4
IS SPLINED TO THE INTERNAL PLATES, IT WILL
ALSO ROTATE FREELY.
(2)
When hydraulic pressure is directed to the
back side of piston 6 (A, foldout 15), the piston
compresses clutch plates 1 (B, foldout 14) and 2
together.
This locks the rotating internal plates to the
stationary external plates preventing ring gear 4 from
rotating.
(3)
With the application of forward clutch in
conjunction with first clutch (refer to a(2), above), a
reaction within the planetary gearing will produce a
forward rotation at the output shaft.
2-15.
LOW CLUTCH (A, foldout 15)
a. Function
(1)
Only the five-speed transmissions include
the low clutch.
Refer to FOLDOUT 2, ITEM 23, FOR ITS
LOCATION
(2)
The low clutch has a dual function.
When
engaged with the forward clutch, it produces first gear.
When engaged with the fourth clutch, it produces
reverse gear.
b. DESCRIPTION.
THE LOW CLUTCH :ONTAIN
THIRTEEN
CLUTCH
PLATES
AND
A
683
TRANSMISSION
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