Meritor 18X Manual de usuario
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.
All rights reserved.
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.
Copyright 2013 by MERITOR VS
Document No. MM-10127
Edition: September 2017
3
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
5
Meritor Differential Carrier 18X
pg.
1
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.
7
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.
26
16
15B
14
24
9a
9
1a
12
10b
13 1g
1b
7
8
2b 5
4
3
6
8
1d
1f 1e
1c
17
18
19
28
22
23
11
28
27
22
29
31
30
21
25
7
1
10a
10
4a
4b
3b
3a
9b
9
2a
2
15A
15
20
9
Meritor Differential Carrier 18X
1Introduction
Exploded view Parts list
1
2
3
4
5
6
7
8
9
10
11
12
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)
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
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
2
1
3
5
68
12
17
22
16
14
26
25
9
4
10
11
16
Right
Bearing Cap
Left
Bearing Cap
Tabla de contenidos
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