Mercedes-Benz Sprinter / Dodge Sprinter. Manual — part 449
OPERATION
The input clutches (Fig. 80) produce a non-positive
locking connection between two elements of a plane-
tary gear set or between one element from each of
two planetary gear sets in order to transmit the drive
torque.
If the piston (20) on multi-plate clutch K1 (1) is
subjected to oil pressure, it presses the internal and
external discs of the disc set together. The sun gear
(17) is locked with the planetary carrier (15) via the
externally toothed disc carrier (19) and the internally
toothed disc carrier (18). The front planetary gear set
is thus locked and turns as a closed unit.
If the multi-plate clutch K2 (2) is actuated via the
piston (14), the piston compresses the disc set. The
annulus gear (16) of the front planetary gear set is
locked with the annulus gear (11) of the center plan-
etary gear set via the externally toothed disc carrier
(13) and the center planetary carrier (10) on which
the internally toothed discs are seated. Annulus gear
(16) and annulus gear (11) turn at the same speed as
the input shaft (21)
If the multi-plate clutch K3 (5) is actuated via the
piston (7), the piston compresses the disc set. The
sun gear (12) of the center planetary gear set is
locked with the sun gear (9) of the rear planetary
gear set via the externally toothed disc carrier (6)
and the internally toothed disc carrier (8). Sun gear
(12) and sun gear (9) turn at the same speed.
Fig. 80 Input Clutches
1 - K1 CLUTCH
12 - CENTER PLANETARY GEARSET SUN GEAR
2 - K2 CLUTCH
13 - K2 CLUTCH EXTERNALLY TOOTHED DISC CARRIER
3 - EXTERNALLY TOOTHED DISC
14 - K2 CLUTCH PISTON
4 - INTERNALLY TOOTHED DISC
15 - FRONT PLANETARY GEARSET PLANETARY CARRIER
5 - K3 CLUTCH
16 - FRONT PLANETARY GEARSET ANNULUS GEAR
6 - K3 CLUTCH EXTERNALLY TOOTHED DISC CARRIER
17 - FRONT PLANETARY GEARSET SUN GEAR
7 - K3 CLUTCH PISTON
18 - K1 CLUTCH INTERNALLY TOOTHED DISC CARRIER
8 - K3 CLUTCH INTERNALLY TOOTHED DISC CARRIER
19 - K1 CLUTCH EXTERNALLY TOOTHED DISC CARRIER
9 - REAR PLANETARY GEARSET SUN GEAR
20 - K1 CLUTCH PISTON
10 - CENTER PLANETARY GEARSET PLANETARY CARRIER
21 - DRIVE SHAFT
11 - CENTER PLANETARY GEARSET ANNULUS GEAR
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AUTOMATIC TRANSMISSION NAG1 - SERVICE INFORMATION
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INPUT CLUTCH K1
DISASSEMBLY
(1) Remove snap-ring (11) (Fig. 81) from outer
multiple-disc carrier (6).
(2) Take multiple-disc pack (12) out of outer mul-
tiple-disc carrier (6). Note which clutch disc is
removed just prior to the spring plate (8) for re-as-
sembly. If the clutch discs are re-used, this disc must
be returned to its original position on top of the
spring plate.
Fig. 81 Input Clutch K1 Components
1 - K1 OUTER DISC CARRIER
7 - DISC SPRING
2 - FREEWHEELING CLUTCH F1
8 - SPRING PLATE
3 - SNAP-RING
9 - SPRING PLATE SEALING RING
4 - OUTER DISC CARRIER SEALING RING
10 - SNAP-RING
5 - PISTON SEALING RING
11 - SNAP-RING
6 - PISTON
12 - MULTIPLE DISC PACK - REFER TO TEXT FOR CORRECT
ASSEMBLY ORDER
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AUTOMATIC TRANSMISSION NAG1 - SERVICE INFORMATION
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(3) Place Multi-use Spring Compressor 8900 (2)
(Fig. 82) on the spring plate and compress the spring
until the snap-ring (1) is exposed.
(4) Remove snap-ring (1).
(5) Take out disc spring (7) and remove piston (6)
by carefully blowing compressed air into the drilled
oil feed passage.
(6) Remove snap-ring (3) and take out front free-
wheeling clutch F1 (2). Take care when removing the
F1 clutch to prevent the clutch sprags from falling
out. If this occurs, the clutch must be replaced.
Fig. 82 Compress the Disc Spring
1 - SNAP-RING
2 - MULTI-USE SPRING COMPRESSOR 8900
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ASSEMBLY
(1) Install piston (6) (Fig. 83) in the outer multi-
ple-disc carrier (1). Check sealing rings (4 and 5),
replace if necessary. The rounded off edges of the
sealing rings must point outwards.
(2) Insert disc spring (7) (Fig. 83). Insert disc
spring with the curvature towards the piston.
(3) Insert spring plate (8). Insert spring plate with
the curvature towards the sun gear. Check sealing
ring (9), replace if necessary.
Fig. 83 Input Clutch K1 Components
1 - K1 OUTER DISC CARRIER
7 - DISC SPRING
2 - FREEWHEELING CLUTCH F1
8 - SPRING PLATE
3 - SNAP-RING
9 - SPRING PLATE SEALING RING
4 - OUTER DISC CARRIER SEALING RING
10 - SNAP-RING
5 - PISTON SEALING RING
11 - SNAP-RING
6 - PISTON
12 - MULTIPLE DISC PACK - REFER TO TEXT FOR CORRECT
ASSEMBLY ORDER
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AUTOMATIC TRANSMISSION NAG1 - SERVICE INFORMATION
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