Driving Clutches - Mercedes-Benz 2005 Sprinter Service Manual

21 - 72 AUTOMATIC TRANSMISSION - NAG1

DRIVING CLUTCHES

DESCRIPTION
Three multi-plate driving clutches (Fig. 73), the
front, middle and rear multi-plate clutches K1, K2
and K3, are located in the planetary gear sets in the
transmission housing.
A multi-plate driving clutch consists of a number of
internally toothed discs (4) on an internally toothed
disc carrier and externally toothed discs (3) on an
externally toothed disc carrier.
1 - K1 CLUTCH
2 - K2 CLUTCH
3 - EXTERNALLY TOOTHED DISC
4 - INTERNALLY TOOTHED DISC
5 - K3 CLUTCH
6 - K3 CLUTCH EXTERNALLY TOOTHED DISC CARRIER
7 - K3 CLUTCH PISTON
8 - K3 CLUTCH INTERNALLY TOOTHED DISC CARRIER
9 - REAR PLANETARY GEARSET SUN GEAR
10 - CENTER PLANETARY GEARSET PLANETARY CARRIER
11 - CENTER PLANETARY GEARSET ANNULUS GEAR
OPERATION
The driving clutches (Fig. 74) produce a non-posi-
tive locking connection between two elements of a
planetary 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.
Fig. 73 Driving Clutches
12 - CENTER PLANETARY GEARSET SUN GEAR
13 - K2 CLUTCH EXTERNALLY TOOTHED DISC CARRIER
14 - K2 CLUTCH PISTON
15 - FRONT PLANETARY GEARSET PLANETARY CARRIER
16 - FRONT PLANETARY GEARSET ANNULUS GEAR
17 - FRONT PLANETARY GEARSET SUN GEAR
18 - K1 CLUTCH INTERNALLY TOOTHED DISC CARRIER
19 - K1 CLUTCH EXTERNALLY TOOTHED DISC CARRIER
20 - K1 CLUTCH PISTON
21 - DRIVE SHAFT
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