wheel MERCEDES-BENZ SPRINTER 2006 Service Manual

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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(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
VAAUTOMATIC TRANSMISSION NAG1 - SERVICE INFORMATION 21 - 93

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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(0.118-0.134 in.) for four disc versions, 3.3-3.7 mm
(0.130-0.146 in.) for five disc versions, and 3.6-4.0
mm (0.142-0.158 in.) for six disc versions.
(13) Adjust with snap-ring (5), if necessary. Snap-
rings are available in thicknesses of 2.6 mm (0.102
in.), 2.9 mm (0.114 in.), 3.2 mm (0.126 in.), 3.5 mm
(0.138 in.), 3.8 mm (0.150 in.), and 4.1 mm (0.162
in.).
(14) Insert front freewheeling clutch F1 (2) and fit
snap-ring (3). The freewheeling clutch F1 (2) must be
installed in the direction of the arrow.
(15) For transmissions using single sided friction
discs, use a feeler gauge to determine the play ªLº
(Fig. 87) at three points between the snap-ring (4)
and outer multiple-disc (2).
(16) During the measurement the snap-ring (4)
must contact the upper bearing surface of the groove
in the outer multiple-disc carrier (3).
(17) The correct clutch clearance for transmissions
with single sided friction discs is 2.4-2.8 mm (0.095-
0.110 in.) for six friction disc versions, 2.6-3.0 mm
(0.102-0.118 in.) for eight disc versions, 2.8-3.2 mm
(0.110-0.126 in.) for ten disc versions, and 2.9-3.3 mm
(0.114-0.130 in.) for twelve disc versions.
(18) Adjust with snap-ring (4), if necessary. Snap-
rings are available in thicknesses of 2.6 mm (0.102
in.), 2.9 mm (0.114 in.), 3.2 mm (0.126 in.), 3.5 mm
(0.138 in.), 3.8 mm (0.150 in.), and 4.1 mm (0.162
in.).
(19) Insert front freewheeling clutch F1 (2) and fit
snap-ring (3). The freewheeling clutch F1 (2) must be
installed in the direction of the arrow.
Fig. 87 Input Clutch K1 Stack-up - Single Sided
Discs
1 - OUTER MULTIPLE DISCS
2 - OUTER MULTIPLE DISC - 4.0MM (0.158 IN.)
3 - K1 OUTER DISC CARRIER
4 - SNAP-RING
5 - INNER MULTIPLE DISCS
6 - DISC SPRING
7 - PISTON
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(11) During the measurement the snap-ring (6)
must contact the upper bearing surface of the groove
in the outer multiple-disc carrier.
(12) The correct clutch clearance is 2.3-2.7 mm
(0.091-0.106 in.) for three friction disc versions, 2.4-
2.8 mm (0.095-0.110 in.) for four disc versions, 2.5-2.9
mm (0.099-0.114 in.) for five disc versions, and 2.7-
3.1 mm (0.106-0.122 in.) for six disc versions.
(13) Adjust with snap-ring (6), if necessary. Snap-
rings are available in thicknesses of 2.3 mm (0.091
in.), 2.6 mm (0.102 in.), 2.9 mm (0.114 in.), 3.2 mm
(0.126 in.), 3.5 mm (0.138 in.), and 3.8 mm (0.150
in.).
(14) Insert axial needle bearing (3) into K1 inner
multiple-disk carrier. Insert axial needle bearing (3)
with a little grease to prevent it slipping.
(15) Install input shaft in K1 inner multiple-disc
carrier with integrated front gear set (2).
(16) Fit internally-geared wheel (18) and install
snap-ring (19). Pay attention to installation position.
VAAUTOMATIC TRANSMISSION NAG1 - SERVICE INFORMATION 21 - 101

(14) Remove the transmission oil filter (1) and
o-ring from the electrohydraulic control unit.
(15) Clean the inside of the oil pan (3) of any
debris. Inspect the oil pan gasket (2) and replace if
necessary.
(16) Install a new oil filter (1) and o-ring into the
electrohydraulic control unit.
(17) Install the oil pan (3) and gasket (2) onto the
transmission.
(18) Install the oil pan bolts (5) and retainers (4).
Torque the bolts to 8 N´m (70 in.lbs.).
(19) Lower the vehicle and add 7.0 L (7.4 qts.) of
transmission fluid to the transmission.
(20) Check the oil level (Refer to 21 - TRANSMIS-
SION/AUTOMATIC - NAG1/FLUID AND FILTER -
STANDARD PROCEDURE - CHECK OIL LEVEL).
FREEWHEELING CLUTCH
DESCRIPTION
Freewheeling clutches (Fig. 154) are installed in
the front planetary gear set between the sun gear
and the stator shaft, and in the rear planetary gear
set between the sun gear and the intermediate shaft.
The freewheel consists of an outer race (4), an
inner race (7), a number of locking elements (3) and
a cage (6) for these locking elements.
OPERATION
The freewheeling clutch (Fig. 155) optimizes indi-
vidual gearshifts. They lock individual elements of a
planetary gear set together or against the transmis-
sion housing in one direction of rotation to allow the
torque to be transmitted.
If the inner race (7) of the freewheeling clutch is
locked and the outer race (4) turns counter-clockwise
(1), the locking elements (3) adopt a diagonal position
on account of their special contours, allowing the
freewheel function. The inner race (4) slides under
the locking elements (3) with minimal friction. If the
rotation of the outer race (4) changes to clockwise (2),
the locking elements (3) stand up and lock the outer
and inner races (4, 7) together.
Fig. 154 Freewheeling Clutch
1 - ROTATION DIRECTION ªA9
2 - ROTATION DIRECTION ªB9
3 - LOCKING ELEMENTS
4 - OUTER RACE
5 - FRONT OR REAR SUN GEAR
6 - LOCKING ELEMENT CAGE
7 - INNER RACE
Fig. 155 Freewheeling Clutch
1 - ROTATION DIRECTION ªA9
2 - ROTATION DIRECTION ªB9
3 - LOCKING ELEMENTS
4 - OUTER RACE
5 - FRONT OR REAR SUN GEAR
6 - LOCKING ELEMENT CAGE
7 - INNER RACE
VAAUTOMATIC TRANSMISSION NAG1 - SERVICE INFORMATION 21 - 135

DISASSEMBLY
(1) Remove retaining ring (5) (Fig. 156) from hol-
low shaft (1).
(2) Remove rear sun gear (4) with the K3 inter-
nally toothed disk carrier and rear freewheeling
clutch F2 (3).
(3) Remove snap-ring (2) (Fig. 156) for freewheel.
(4) Press freewheeling clutch (3) out of sun gear.
(5) Check O-rings (6), replace if necessary.
Fig. 156 Freewheeling Clutch F2
1 - HOLLOW SHAFT 4 - K3 INNER DISC CARRIER AND REAR PLANETARY SUN
GEAR
2 - F2 CLUTCH SNAP-RING 5 - RETAINING RING
3 - FREEWHEELING CLUTCH F2 6 - O-RINGS
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(6) Check the anti-friction bearing (2) (Fig. 157) in
the rear planetary sun gear for damage. Replace as
necessary.
Fig. 157 Freewheeling Clutch F2 Anti-Friction
Bearing
1 - K3 INNER DISC CARRIER AND REAR PLANETARY SUN
GEAR
2 - ANTI-FRICTION BEARING
3 - FREEWHEELING CLUTCH F2
VAAUTOMATIC TRANSMISSION NAG1 - SERVICE INFORMATION 21 - 137

ASSEMBLY
NOTE: The side of the freewheeling clutch F2 (3)
with the markings (directional arrow, part number,
etc.) must be up when the clutch is installed in the
sun gear (4).
(1) Press freewheeling clutch F2 (3) (Fig. 158) into
sun gear (4).
(2) Install snap-ring (2) for freewheeling clutch.
(3) Check O-rings (6) (Fig. 158) on hollow shaft,
replace if necessary.
(4) Install rear sun gear (4) with K3 internally
toothed disc carrier and rear freewheeling clutch (3)
onto the hollow shaft.
(5) Verify proper operation of the freewheeling
clutch F2. When the assembly is held with the F2clutch snap-ring upward, it should be possible to
rotate the hollow shaft counter-clockwise.
(6) Install retaining ring (5) onto hollow shaft (1).
GEARSHIFT CABLE
DIAGNOSIS AND TESTING
GEARSHIFT CABLE
(1) The floor shifter lever and gate positions
should be in alignment with all transmission PARK,
NEUTRAL, and gear detent positions.
(2) Engine starts must be possible with floor shift
lever in PARK or NEUTRAL gate positions only.
Fig. 158 Freewheeling Clutch F2
1 - HOLLOW SHAFT 4 - K3 INNER DISC CARRIER AND REAR PLANETARY SUN
GEAR
2 - F2 CLUTCH SNAP-RING 5 - RETAINING RING
3 - FREEWHEELING CLUTCH F2 6 - O-RINGS
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OPERATION
Signals from the input speed sensors (6, 8) (Fig.
183) are recorded in the transmission control module
(TCM) together with the wheel and engine speeds
and other information and are processed into an
input signal for electronic control.
Input speed sensor N2 (6) records the speed of the
front sun gear via the externally toothed disc carrier
of the multiple-disc clutch K1 (10) and input speed
sensor N3 (8) records the speed of the front planet
carrier via the internally toothed disc carrier of mul-
tiple-disc clutch K1 (3).
OIL PUMP
DESCRIPTION
The oil pump (2) (Fig. 184) (crescent-type pump) is
installed in the bellhousing behind the torque con-
verter and is driven by the drive flange of the torque
converter. The pump creates the oil pressure required
for the hydraulic procedures.
OPERATION
When the engine is running, the oil (Fig. 185) is
pumped through the inlet chamber (5) along the
Fig. 183 Input Speed Sensors
1 - DRIVING CLUTCH K1
2 - TRANSMISSION HOUSING
3 - DRIVING CLUTCH K1 INTERNALLY TOOTHED DISC
4 - EXCITER RING
5 - VALVE HOUSING OF SHIFT PLATE
6 - N2 INPUT SPEED SENSOR
7 - SPRING
8 - N3 INPUT SPEED SENSOR
9 - EXCITER RING
10 - DRIVING CLUTCH K1 EXTERNALLY TOOTHED DISC
Fig. 184 Oil Pump
1 - CRESCENT
2 - OIL PUMP
3 - EXTERNAL GEAR
4 - INTERNAL GEAR
5 - INLET CHAMBER
6 - PRESSURE CHAMBER
Fig. 185 Oil Pump
1 - CRESCENT
2 - OIL PUMP
3 - EXTERNAL GEAR
4 - INTERNAL GEAR
5 - INLET CHAMBER
6 - PRESSURE CHAMBER
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