Meritor 18X Manuel utilisateur

Maintenance Manual MM-10127

Single Reduction Differential Carrier

18X

Issue September 2017

2Meritor Differential Carrier 18X

Service Notes

Before You Begin

This publication provides installation and maintenance procedures

for the Single Reduction Differential Carrier 18X produced by

MERITOR VS.

The information contained in this publication was current at the

time of printing and is subject to revision without notice or liability.

You must understand all procedures and instructions before you

begin maintenance and service procedures.

You must follow your company's maintenance and

service guidelines.

You must use special tools, when required, to avoid serious

personal injury and damage to components.

Meritor uses the following notations to alert the user of possible

safety issues and to provide information that will help to prevent

damage to equipment and components.

WARNING

A WARN NG indicates a procedure that you must follow

exactly to avoid serious personal injury.

CAUTION

A CAUT ON indicates a procedure that you must follow

exactly to avoid damaging equipment or components.

Serious personal injury can also occur.

NOTE: A note indicates an operational, procedure or instruction

that is important for proper service. A NOTE can also supply

information that will help to make service quicker and easier.

This symbol indicates that you must tighten fasteners to a

specific torque.

Information contained in this publication was in effect at the time the publication

was approved for printing and is subject to change without notice or liability.

Meritor Commercial Vehicle Systems reserves the right to revise the information

presented to discontinue the production of parts described at any time.

Access nformation on Meritor's Web Site

Additional maintenance and service information for Meritor's

commercial vehicle systems component lineup is also available at

www.meritor.com visiting the “Literature on Demand” page.

No part of this publication may be reproduced in any form or by any means or

granted to any third parties without thewritten permission of MERITOR.

MERITOR reserves the right to publish revisions at any time for technical or

commercial purposes. Therefore all material contained in this manual is based on

the latest information available at time of publication approval.

Document No. MM-10127

Edition: September 2017

Meritor Differential Carrier 18X

Contents

05 Section 1: ntroduction

07 Specification & Data

08 Exploded View

09 Exploded View Parts List

10 Section View

11 Section View Parts List

13 Section 2: Maintenance

14 Differential Removal & Installation

14 Checking the Rear Axle ousing

15 Ring Gear & Pinion Adjustment

16 Shim Pack Calculation

18 Carrier Assembly

22 Calculating the Preload Spacer

27 Differential Bearing Assembly

30 Adjust Differential Bearings Preload

33 Tooth Contact Patterns & ypoid Gear Set

38 Installation & Adjustment of the Diff Lock Sensor Switch

41 Section 3: Hypoid Gear Patterns

42 ypoid Gear Pattern Tables

45 Section 4: Pinion Seal Replacement

46 Disassembly

47 Assembly

51 Section 5: Differential Lock Removal

52 Differential Lock Removal

53 Section 6: Tightening Torque Values

& Lubrication

54 Section view

55 Tightening Torque Table

57 Section 7: Troubleshooting

58 Troubleshooting Chart

pg. 59 Section 8: Service Tools

60 MST4209 CT05 Keying Tool - Spigot Bearing

61 MST4210 CT06 Keying Tool Punch -

Spigot Bearing Pinion

62 MST4216 CT12 Wrench - Adjusting Ring

63 MST4400 CT13 Flange lock tool

64 MST4401 CT14 Seal removal tool

65 MST4410 CT26 Fitting tool - Pinion shaft seal

66 MST4707 CT47 Diff. Bearing Cone R/ Tool

67 MST4708 CT48 Diff Lock Spring Compression Tool

68 MST4709 CT49 Diff. Lock Spring Fitting Tool

69 MST4712 CT52 Diff & Crown Wheel lifting Tool

70 MST4713 Wrench - Adjusting Ring L

71 MST4714 Wrench - Adjusting Ring R

72 MST4904 Inner Pinion Bearing Measuring Tool

73 MST4902 Inner Bearing Cup Tool (Pinion)

74 MST4802 Outer Bearing Cup Tool (Pinion)

75 MST4901 Inner Bearing Cone Tool (Pinion)

76 MST4804 Outer Bearing Cone Tool (Pinion)

77 MST4903 Diff. Bearing Cone L/ Tool

78 MST4905 Axle Shaft Punch Tool

79 MST4807 Inner deflector

80 MST4808 Inner ring

81 Section 9: Appendix

82 Available spacers and combination of calculated

spacers

pg.

4Meritor Differential Carrier 18X

Terms used in this manual

Manufacturer:

MERITOR

Manual:

Maintenance manual no. MM-010127

Device:

Single Reduction Differential Carrier 18X

Technician:

Qualified personnel working on the Single Reduction Differential

Carrier maintenance and servicing.

Maintenance and servicing:

Maintenance and servicing refer to periodical checks and/or

replacement of the Differential Carrier or components. It also

refers to the determining of the cause of a malfunction in order to

restore the initial operating conditions.

Operator:

Any person who will use the Single Reduction Differential Carrier

as part of a more complex device.

Warranty

Warranty applies to the Single Reduction Differential Carrier

installed on vehicles for which it was designed. Warranty is void in

the following cases:

• Improper use of the vehicle on which the Single Reduction

Differential Carrier is installed (usage conditions, overloading etc.)

• Tampering with vehicle components that may affect the Single

Reduction Differential Carrier assembly performance.

• Use of non-original spare parts.

• Improper installation, adjustment, repair or modification.

• Poor or improper maintenance (including consumables other

than those specified).

Further information on warranty conditions may be obtained

directly from the manufacturer or by referring to the Meritor web

site www.meritor.com

Meritor Differential Carrier 18X

pg.

ntroduction

07 Specification & Data

08 Exploded View

09 Exploded View Parts List

10 Section View

11 Section View Parts List

6Meritor Differential Carrier 18X

1Introduction

General description

The differential unit is of the single-reduction type featuring a

hypoid gear set. The bevel pinion is mounted on two taper roller

bearings and a third straight roller bearing. The bevel pinion

setting relative to the drive gear can be adjusted by varying the

thickness of the shim pack located between the inner pinion

bearing cup and the carrier bearing shoulder. The differential

assembly drive gear welded is supported on two taper roller

bearings and is adjusted for end play through two threaded ring

nut adjusters.

Specifications and data

Hypoid pinion bearings

2 taper roller and 1 straight roller bearing

Differential unit

Final Drive ypoid Gear Ratio (and bevel set teeth)* 2.47 (15/37): 2.64 (14/37): 2.85 (13/37): 3.08 (12/37):

3.36 (11/37): 3.67 (9/33): 3.40 (10/34): 4.11 (9/37):

4.63 (8/37): 5.29 (7/37): 6.17 (6/37)

Pinion to Drive Gear Backlash 0.21 ÷ 0.50 mm

Pinion to Crown Backlash Adjustment Adjusting Rings

Differential Bearing Cap Divergence 0.15 - 0.33 mm

Differential Bearing Cap Divergence Adjustment using the Ring Nut Adjusters

Thickness Range for the Shims fitted between the

Bevel Pinion Bearing Cage & the Differential Carrier 0.10 - 0.15 - 0.35 - 0.50 mm

Drive Gear runout 0.20 max mm

Pinion Bearing Preload 4 - 8 Nm without Pinion Seal

* Verify with the Engineering reference the range of the ratio in current production because sometimes some ratios could be already

released but not currently in production.

Meritor Differential Carrier 18X

1Introduction

8Meritor Differential Carrier 18X

1Introduction

Exploded view

Fig. 1.1

No Diff Lock OptionPiston (18) and

Shift Shaft (28)

single component.

15B

10b

13 1g

2b 5

1f 1e

10a

15A

Meritor Differential Carrier 18X

1Introduction

Exploded view Parts list

Ref. Description

Diff Carrier & Cap Assembly

1a Diff Carrier

1b Bearing Cap R (Disjoint)

1c Bearing Split Cap L

1d Capscrew - Bearing Cap R

1e Capscrew - Bearing Cap L

1f Bearing Cap Washer

1g Locator Pin

Differential Gear Set Assembly

2a Drive Pinion

2b Diff Assembly & Drive Gear - Welded

Diff Bearing L Side

3a Diff Bearing Cup L

3b Diff Bearing Cone L

Diff Bearing R Side

4a Diff Bearing Cup R

4b Diff Bearing Cone R

Adjusting Ring R Side

Adjusting Ring L Side

Lock - Adjusting Ring

Capscrew - M6 x 20

Outer Pinion Bearing

9a Outer Pinion Bearing Cup

9b Outer Pinion Bearing Cone

Inner Pinion Bearing

10a Inner Pinion Bearing Cup

10b Inner Pinion Bearing Cone

Spacer (Variable)

Shim - Inner Pinion Bearing Cup (0.10mm)

Shim - Inner Pinion Bearing Cup (0.15mm)

Shim - Inner Pinion Bearing Cup (0.35mm)

Shim - Inner Pinion Bearing Cup (0.50mm)

Ref. Description

Spigot Bearing

Pinion Seal

Companion Flange & Deflector Assy

15a - Companion Flange

15b - Deflector

Pinion Nut - M60

Shift Fork

Piston

“O”Ring (40mm diameter)

Shift Shaft Spring

Diff Lock ole Cover

Gasket

ex ead Capscrew - M6 x 20

Identification Plate

Clutch Shift Collar

Lock-Nut - Sensor Switch

Sensor Switch

Shift Shaft

ole-End Plate Cover

Blanking Plug - Sensor Switch ole

Washer Plug

10 Meritor Differential Carrier 18X

1Introduction

Section view

Fig. 1B

Right

Bearing Cap

Left

Bearing Cap

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