Jan 30, 2003 - Reproduction by any means or by any information storage and retrieval system or translation in whole or part is not permitted without written.
These technical training materials are current as of the date noted on the materials, and may be revised or updated without notice. Always check for revised or updated information. To help avoid personal injury to you or others, and to avoid damage to the vehicle on which you are working, you must always refer to the latest Mercedes-Benz Technical Publication and follow all pertinent instructions when testing, diagnosing or making repair. Illustrations and descriptions in this training reference are based on preliminary information and may not correspond to the final US version vehicles. Refer to the official introduction manual and WIS when available. Copyright Mercedes-Benz USA, LLC, 2003
Reproduction by any means or by any information storage and retrieval system or translation in whole or part is not permitted without written authorization from Mercedes-Benz USA, LLC or its successors. Published by Mercedes-Benz USA, LLC Printed in U. S.A.
2
Transfer Case Identification VG 150 E 3W / 2.14
Low Range Ratio
ID tag at rear of Transfer case
3 Shafts Electronic Motor Input Torque (Nm) Transfer Case
Only 1 version / ratio for USA application - High range 1.05 3
Maintenance Rear
Front
Fill Spill
• Every B service check oil level (check cold) • Oil change - 60,000 miles or 5 years since last change • Oil grade - DEAGEAR Synthetic SAE 75W - 90 (sheet # 231.1 car / off road vehicles) 2.8 liters or 2.9 quarts 4
Coupling Flanges Flange position is vital: - mark propeller shaft to flange - mark flange to shaft
Tool for removing coupling flanges
460 589 02 33 00 6
Coupling Flanges Check concentricity of flange – vibration complaint – replacement of coupling flange Specification: ≤ 0.07 mm If there are deviations perform adjustment: • • • •
Offset flange 180º clockwise & recheck If not within specification offset flange 90º clockwise & recheck If not within specification offset flange 180º clockwise & recheck If the specified concentricity value is not achieved, replace flange & recheck
Washer Tapered roller bearing Washer High range gear Spring Synchronizer cone Needle roller bearing Input shaft Sliding sleeve Synchronizer cone Spring Synchronizer ring Needle roller bearing Low range gear Washer Straight pin Tapered roller bearing Spacer nut Nut Washer 9
Input Shaft Input shaft serviceable – use correct tools as described in WIS to disassemble / assemble shaft – when installing new bearings heat bearings to 120ºC Max.
If parts are replaced adjust input shaft axial play
Countershaft • Countershaft gears not serviceable – if damaged, replace assembly • Countershaft bearings serviceable – use correct tools as described in WIS to disassemble / assemble shaft – when installing new bearings heat bearings to 120ºC Max.
If parts are replaced adjust countershaft axial play 13
Axial Play Adjustment Procedure is the same for the input and countershaft. The following example shows input shaft axial play adjustment.
Thrust device #463 589 00 21 00
B = 4.90mm
1) Install thrust device with spacers & tighten compressing bolt to 15Nm 2) Spin input shaft approx. 10 times to position the bearings 3) Measure distance between outer race and intermediate flange - B (example 4.90mm) 14
Axial Play Adjustment 4) Measure depth between intermediate flange cover and bearing seat - A
A = 5.50mm
Calculation example: Depth Distance
A B
5.50 mm 4.90 mm
Difference
0.60 mm
Preload on bearings
0.10 mm
Shims required
0.70 mm
Spec is 0 mm play + preload of (0.1 mm ± 0.05)
5) Install the appropriate shims: available thickness Î 0.1, 0.15, 0.3 & 1.0 mm 15
Center Differential 1. Front tapered roller bearing
Center Differential • Center differential serviceable – use correct tools as described in WIS to disassemble / assemble – when installing new bearings heat bearings to 120ºC Max. • If replace differential bevel gears – check friction torque of differential AR28.50-P-1023-05B • If other parts are replaced – adjust center differential axial play AR28.50-P-1023-04B
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Center Differential Axial Play • • • • •
Remove outer race (2) and shims (3) from axle input shaft bearing cap (4) Install new outer race with a 1.0 mm shim Install axle input shaft cover (4) with 3 equally spaced bolts (5 Nm) Measure gap at bearing cap with feeler gauge - (e.g. 0.80 mm) Calculate correct shim required: Specification = 0.1 mm (+/- 0.05 mm) 0.80 mm - 0.10 = 0.70 mm shim (shims available 0.1, 0.15, 0.3 & 1.0 mm)
• Remove outer race and reinstall with appropriate shims
18
Bearing Cap
Puller 000 589 88 33 00 28 B Drift punch 463 589 00 15 00 28 B – Used with puller arms – 463 589 05 34 00 (26C) – Thrust piece 463 589 01 34 00 (28B) 19
Transfer Case Power Flow
Power Flow
Center differential lock
High N Low
Input shaft
Countershaft
Center differential 21
High Range
High N Low
1.05:1 22
Low Range
High N Low
2.15:1 23
Low Range (Diff Locked)
High N Low
24
Neutral N
High
N
N Low
Input shaft bearings can be damaged if engine runs for extended period of time with transmission not in park. (no oil reaches bearings) 25
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