clutch MERCEDES-BENZ SPRINTER 2006 Manual PDF

DIAGNOSIS AND TESTING
AUTOMATIC TRANSMISSION
CAUTION: Before attempting any repair on a NAG1
automatic transmission, check for Diagnostic Trou-
ble Codes with the appropriate scan tool.
Transmission malfunctions may be caused by these
general conditions:
²Poor engine performance.
²Improper adjustments.
²Hydraulic malfunctions.
²Mechanical malfunctions.
²Electronic malfunctions.
²Transfer case performance (if equipped).
Diagnosis of these problems should always begin
by checking the easily accessible variables: fluid level
and condition, gearshift cable adjustment. Then per-
form a road test to determine if the problem has been
corrected or if more diagnosis is necessary.
PRELIMINARY
Two basic procedures are required. One procedure
for vehicles that are drivable and an alternate proce-
dure for disabled vehicles (will not back up or move
forward).
VEHICLE IS DRIVABLE
(1) Check for transmission fault codes using the
appropriate scan tool.
(2) Check fluid level and condition.
(3) Adjust gearshift cable if complaint was based
on delayed, erratic, or harsh shifts.
(4) Road test and note how transmission upshifts,
downshifts, and engages.
VEHICLE IS DISABLED
(1) Check fluid level and condition.(2) Check for broken or disconnected gearshift
cable.
(3) Check for cracked, leaking cooler lines, or loose
or missing pressure-port plugs.
(4) Raise and support vehicle on safety stands,
start engine, shift transmission into gear, and note
following:
(a) If propeller shaft turns but wheels do not,
problem is with differential or axle shafts.
(b) If propeller shaft does not turn and transmis-
sion is noisy, stop engine. Remove oil pan, and
check for debris. If pan is clear, remove transmis-
sion and check for damaged driveplate, converter,
oil pump, or input shaft.
(c) If propeller shaft does not turn and transmis-
sion is not noisy, perform hydraulic-pressure test to
determine if problem is hydraulic or mechanical.
ROAD TESTING
Before road testing, be sure the fluid level and con-
trol cable adjustments have been checked and
adjusted if necessary. Verify that all diagnostic trou-
ble codes have been resolved.
Observe engine performance during the road test.
A poorly tuned engine will not allow accurate analy-
sis of transmission operation.
Operate the transmission in all gear ranges. Check
for shift variations and engine flare which indicates
slippage. Note if shifts are harsh, spongy, delayed,
early, or if part throttle downshifts are sensitive.
Slippage indicated by engine flare, usually means
clutch, overrunning clutch, or line pressure problems.
A slipping clutch can often be determined by com-
paring which internal units are applied in the vari-
ous gear ranges. The Clutch Application chart
CLUTCH APPLICATION provides a basis for analyz-
ing road test results.
CLUTCH APPLICATION
GEAR RATIO B1 B2 B3 K1 K2 K3 F1 F2
1 3.59 X* X X* X X
2 2.19 X X X* X
3 1.41 X X X
4 1.00 X X X
5 0.83 X X X X*
N N/A X X
R 3.16 X* X X X
R - Limp In 1.93 X X X
* = The shift components required during coast.
VAAUTOMATIC TRANSMISSION NAG1 - SERVICE INFORMATION 21 - 39

AUTOMATIC TRANSMISSION
CONDITION POSSIBLE CAUSES CORRECTION
MAXIMUM SPEED 30
km/h1. Speed Control 30 Actuated. 1. Instruct Customer.
ENGINE DIES WHEN
TRANSMISSION IS SHIFT-
ED INTO GEAR, ALSO
NOISES IN N AND/OR P1. PWM Valve Blocked. 1. Replace Valve.
2. Torque Converter Lock Up Con-
trol Valve Locked.2. Enable Movement of Valve,
Remove Particle.
LEVER IN ªPº POSITION
BLOCKED (BRAKE ACTI-
VATED)1. No Vacuum Brake Booster After
Long Immobilization, Brake Pedal
Not Fully Applied/Hard Pedal.1. Check Vacuum/ Tightness of
Brake Booster.
2. No Stoplamp Switch Signal (no
DTC IN ECM).2. Check Contact to Stoplamp
Switch. Replace Switch if Nec-
essary.
GRUMBLING, DRONING,
JERKING WHEN TCC IS
ENGAGED1. Slip Speed TCC to Low. 1. Switch Off Torque Converter
Lock Up Using DRBT. If Com-
plaint Is Not Reproduced After-
wards, Replace PWM Valve,
Set Adaption Values to Zero.
HOWLING, HUMMING
ABOVE 4000 RPM IN
EACH GEAR1. Oil Filter Blocked. 1. Replace Oil Filter.
2. Oil Pump. 2. Replace Oil Pump.
WHINING, SINGING 1. Gear Set Noises in 1st, 2nd, 5th
Gear.1. Replace Transmission..
2. Intermediate Bearing Of The
Drive Shaft At 0 km/h, Only When
Cold.2. Replace Intermediate Bear-
ing of the Drive Shaft.
9CLACKº NOISE FROM
CENTER SHIFT AREA
WHEN STOPPING OR
STARTING1. Park Lock Solenoid. 1. Replace Shift Lever Assem-
bly.
CRACKING NOISE WHEN
LOAD CYCLE1. Stick - Slip Between Joint Flange
and Collar Nut.1. Install Zinc Coated Collar
Nut Together With Washer.
CHATTERING IN CENTER
CONSOLE SHIFT WHILE
ACCELERATING1. Bushing Shift Shaft Has Too
Much Clearance.1. Replace Shifter Lever and
Cover Plate.
HARD 2-3 UPSHIFT
WHEN STEPPING OFF
THE ACCELERATOR PED-
AL1. Response Characteristic Control
Loop.1. Install K2 Disc Spring.
UPSHIFT 2-3, 3-4 SLIP-
PING1. Spring of Regulating Valve Pres-
sure control Valve Broken.1. Replace Spring.
HARD 2-1 DOWNSHIFT
WHEN COMING TO A
STOP1. Transmission (2-1 downshift) Not
Adapted.1. Re-adapt Transmission.
2. TCM Software Data. 2. Flash TCM.
3. Free Wheeling Clutch F1 Defec-
tive.Replace Free Wheeling Clutch
F1.
21 - 40 AUTOMATIC TRANSMISSION NAG1 - SERVICE INFORMATIONVA

CONDITION POSSIBLE CAUSES CORRECTION
HARD 3-2 DOWNSHIFT
WHEN DECELERATION
EVEN AFTER READAP-
TION1. K3 Idles. 1. Install TCM And/Or Electro-
hydraulic Control Unit.
NO RESP. DELAYED UP-
SHIFT, NO DTC1. Different Tire Sizes Are Mounted
On The Front Axle.1. Mount Uniform Tire Sizes
On The Front Axle.
NO UPSHIFT 3-4, 4-5 AF-
TER FAST OFF (ACCEL-
ERATOR)1. Upshift Prevention To Realize Dy-
namical Drivestyle.1. Instruct Customer.
NO UPSHIFT OF 1ST
GEAR BELOW 5000 RPM1. Gear Recognition Switch. 1. Replace Gear Recognition
Switch.
NO UPSHIFT INTO 5TH
GEAR WHEN FULL
THROTTLE OR KICK
DOWN ACTIVATION1. The Upshift 4-5 At Full Throttle or
Kick Down Never Occurs Until
Reaching Cut Off Speed. Under
These Conditions, The High Pow-
ered Vehicle Will Never Shift Into
5th Gear Below 250 km/h.1. Instruct Customer.
NO KICK DOWN SHIFT-
ING1. Accelerator Pedal Value < 95%. 1. Check Engine Control. Ad-
just As Necessary.
Engine Turns Up While 2-3
Upshift and/or Hard 3-2
Downshift1. Oil Level Too Low. 1. Check Oil Level. Add if Nec-
essary.
2. Oil Filter Not Installed. 2. Install Oil Filter.
3. Free Wheeling Clutch F2 Defec-
tive.3. Replace Free Wheeling
Clutch F2, Hollow Shaft, and
Rear Sun Gear/Inner Disc Car-
rier K3.
GRABBING 2-3 COAST-
ING UPSHIFT AND/OR
BRAKE DOWNSHIFT1. Oil Level Too Low. 1. Check Oil Level. Add if Nec-
essary.
2. Oil Filter Not Installed. 2. Install Oil Filter.
3. Control shift or Command Valve
Blocked.3. Check Each Slide Valve For
Base Position and Ease Of
Movement, Remove Particle.
4. K3 Disc Burnt, Hot Spots or
Rubbed Down.4. Replace Inner and Outer
Disc Carrier K3 And Control
Valve.
DELAYED ENGAGEMENT,
NO TRANSFER OF POW-
ER IN R AND/OR D, ALSO
AT TIMES1. Oil Level Too Low. 1. Check Oil Level. Add if Nec-
essary.
2. Recognition Switch - Selector Le-
ver Position.2. Replace Recognition Switch
Only When Intermediate Posi-
tion or Fault is Indicated.
3. Oil Filter Not Installed. 3. Install Oil Filter.
4. AEV, Delayed Pressure Build Up
On Piston B2/B3.4. Install New Shifting Proce-
dure (TCM, electrohydraulic
control unit or repair set).
5. Wrong Combination TCM/Electro-
hydraulic Control Unit.5. Check Combination TCM/
Electrohydraulic Control Unit.
Replace TCM Resp. Electrohy-
draulic Control Unit, if neces-
sary.
VAAUTOMATIC TRANSMISSION NAG1 - SERVICE INFORMATION 21 - 41

(17) Remove the bolts holding the transmission
housing to the converter housing from inside the con-
verter housing.
(18) Stand the transmission upright on the con-
verter housing. Be sure to use suitable spacers
between the bench surface and the converter housing
since the input shaft protrudes past the front surface
of the housing.
(19) Remove the remaining bolts holding the
transmission housing to the converter housing.
(20) Remove the transmission housing from the
converter housing.
(21) Remove output shaft with center and rear
gear set and clutch K3 (3) (Fig. 45).
(22) Remove thrust needle bearing (4) and thrust
washer (5) (Fig. 45).
(23) Remove input shaft with clutch K2 and front
gear set (6).
(24) Remove clutch K1 (1).
Fig. 45 Remove K1, K2, and K3 Clutches
1 - DRIVING CLUTCH K1 5 - THRUST WASHER
2 - SUN GEAR OF FRONT PLANETARY GEAR SET 6 - FRONT PLANETARY GEAR SET, DRIVING CLUTCH K2, AND
INPUT SHAFT
3 - DRIVING CLUTCH K3, OUTPUT SHAFT, AND CENTER AND
REAR PLANETARY GEAR SETS7 - SEALING RINGS
4 - THRUST NEEDLE BEARING
VAAUTOMATIC TRANSMISSION NAG1 - SERVICE INFORMATION 21 - 49

(25) Unscrew Torx socket bolts (4) (Fig. 46) and
remove oil pump (6). Screw two opposed bolts into
the oil pump housing and press the oil pump out of
the converter housing by applying light blows with a
plastic hammer.
(26) Remove and discard the torque converter hub
seal and the oil pump outer o-ring seal from the oil
pump.
(27) Unscrew Torx socket bolts (1) (Fig. 46) and
remove multiple-disc holding clutch B1 (5) from con-
verter housing. Screw two opposed bolts into the
multiple-disc holding clutch B1 (5) and separate from
the converter housing by applying light blows with a
plastic hammer.
(28) Detach intermediate plate (3) (Fig. 46) from
converter housing (2).
Fig. 46 Remove Holding Clutch B1 and Oil Pump
1 - BOLTS - M6X32 4 - BOLTS - M8X35
2 - CONVERTER HOUSING 5 - HOLDING CLUTCH B1
3 - INTERMEDIATE PLATE 6 - OIL PUMP
21 - 50 AUTOMATIC TRANSMISSION NAG1 - SERVICE INFORMATIONVA

(29) Remove multiple-disc pack B3 (2) (Fig. 47)
and spring washer (3) by removing snap-ring (1) in
transmission housing. To facilitate removal of the
snap-ring (1), compress the multiple-disc pack B3 (2).
Note which clutch disc is removed just prior to the
spring washer (3) for re-assembly. If the clutch discs
are re-used, this disc must be returned to its original
position on top of the spring washer.
(30) Unscrew Torx socket bolts (7) (Fig. 47).
(31) Remove multiple-disc holding clutch B2 (4)
(Fig. 47) from transmission housing. The externally
toothed disc carrier for multiple-disc holding clutch
B2 is also the piston for multiple-disc holding clutch
B3.
(32) Remove parking lock gear (5) (Fig. 47).
Fig. 47 Remove B2, B3, and Parking Gear
1 - SNAP-RING 5 - PARK GEAR
2 - HOLDING CLUTCH B3 DISCS 6 - TRANSMISSION HOUSING
3 - SPRING WASHER 7 - BOLTS - M8X60
4 - HOLDING CLUTCH B2
VAAUTOMATIC TRANSMISSION NAG1 - SERVICE INFORMATION 21 - 51

ASSEMBLY
(1) Insert parking lock gear (5) (Fig. 48).
(2) Install multiple-disc holding clutch B2 (4) in
transmission housing (6) (Fig. 48).
(3) Screw in both Torx socket bolts (7). Tighten the
bolts to 16 N´m (141 in.lbs.).
Fig. 48 Install B2, B3, and Parking Gear
1 - SNAP-RING 5 - PARK GEAR
2 - HOLDING CLUTCH B3 DISCS 6 - TRANSMISSION HOUSING
3 - SPRING WASHER 7 - BOLTS - M8X60
4 - HOLDING CLUTCH B2
Fig. 49 Measure B3 Clutch Clearance
1 - OUTER DISC - 6.5 MM
(0.256 IN.)5 - PISTON
2 - OUTER DISCS - 1.8 MM
(0.071 IN.)6 - FRICTION DISCS
3 - OUTER DISCS - 1.8 MM
(0.071 IN.)7 - SNAP-RING
4 - SPRING WASHER 8 - B3 DISC CARRIER
21 - 52 AUTOMATIC TRANSMISSION NAG1 - SERVICE INFORMATIONVA

NOTE: During the measurement the snap ring (7)
(Fig. 49) must contact the upper bearing surface of
the groove in the outer multiple-disc carrier (8).
NOTE: Pay attention to sequence of discs. If the
original clutch discs are reused, be sure to return
the disc identified on disassembly as belonging on
top of the spring washer (4) to its original location.
Place new friction multiple-discs in ATF fluid for
one hour before installing.
(4) Insert and measure spring washer (4) (Fig. 49)
and multiple-disc pack B3 (2, 6).
(a) Put multiple-discs for multiple-disc holding
clutch B3 together in the sequence shown in the
illustration and insert individually.
(b)
CAUTION: Apply only light pressure (less than 10 N
(3 lbs.) of force) to the clutch pack when measuring
the clutch clearance with the feeler gauge. Applying
excessive force to the clutch will give an incorrect
reading and lead to a transmission failure.Using a
feeler gauge, determine the play ªLº at three points
between the snap ring (7) and outer multiple-disc
(1). B3 clutch clearance should be 1.0-1.4 mm
(0.039-0.055 in.). Adjust the clearance as necessary.
(c) Adjust with snap-ring (7), if necessary. Snap-
rings are available in thicknesses of 3.2 mm (0.126
in.), 3.5 mm (0.138 in.), 3.8 mm (0.150 in.), 4.1 mm
(0.162 in.), 4.4 mm (0.173 in.), and 4.7 mm (0.185
in.).
(5) Check that the K1 clutch feed hole (1) (Fig. 50)
in the inner hub of clutch B1 is free before installing
clutch B1.
Fig. 50 Check K1 Feed Hole
1 - K1 CLUTCH FEED HOLE
VAAUTOMATIC TRANSMISSION NAG1 - SERVICE INFORMATION 21 - 53

(6) Place intermediate plate (3) on converter hous-
ing (2) and align.
NOTE: The intermediate plate can generally be used
several times. The plate must not be coated with
sealant
(7) Install the holding clutch B1 (5) (Fig. 51) onto
the converter housing and intermediate plate.
Installed position of clutch B1 in relation to converter
housing is specified by a plain dowel pin in clutch B1
(arrow).
(8) Install the bolts to hold clutch B1 (5) (Fig. 51)
to the converter housing.
(9) Securely tighten multiple-disc holding clutch
B1 (5) on converter housing (2) to 10 N´m (88.5
in.lbs.).
(10) Install new torque converter hub seal (1) (Fig.
52) into the oil pump using Seal Installer 8902A.
(11) Install new oil pump outer o-ring seal onto oil
pump (Fig. 52).
Fig. 51 Install Holding Clutch B1 and Oil Pump
1 - BOLTS - M6X32 4 - BOLTS - M8X35
2 - CONVERTER HOUSING 5 - HOLDING CLUTCH B1
3 - INTERMEDIATE PLATE 6 - OIL PUMP
Fig. 52 Install New Oil Pump Seals
1 - INNER OIL SEAL
2 - OUTER OIL SEAL
21 - 54 AUTOMATIC TRANSMISSION NAG1 - SERVICE INFORMATIONVA

(13) Using grease, insert sealing rings (7) (Fig. 53)
in the groove so that the joint remains together.
(14) Install the K1 (1) clutch onto the B1 clutch
(Fig. 53).
(15) Install input shaft with clutch K2 (6) and
front gear set (1) (Fig. 53).
(16) Install front washer (5) and thrust needle
bearing (4) (Fig. 53).
(17) Install output shaft with center and rear gear
set and clutch K3 (3) (Fig. 53).
Fig. 53 Install K1, K2, and K3 Clutches
1 - DRIVING CLUTCH K1 5 - THRUST WASHER
2 - SUN GEAR OF FRONT PLANETARY GEAR SET 6 - FRONT PLANETARY GEAR SET, DRIVING CLUTCH K2, AND
INPUT SHAFT
3 - DRIVING CLUTCH K3, OUTPUT SHAFT, AND CENTER AND
REAR PLANETARY GEAR SETS7 - SEALING RINGS
4 - THRUST NEEDLE BEARING
Fig. 54 Measure From Transmission Housing to
Park Gear
1 - GAUGE BAR 6311
2 - PARK GEAR
21 - 56 AUTOMATIC TRANSMISSION NAG1 - SERVICE INFORMATIONVA