MAINTENANCE MANUAL Edition october/11Differential axles TandemMT 46-145MT 50-168
9IntroductionMAINTENANCE MANUALInter Axle Differential (IAD)The Meritor inter-axle differential (IAD) is a driv-er controlled,Air actuated traction de
99LubricationMAINTENANCE MANUALSpecicationsFor complete information on lubricating drive axles and differentials, refer to Maintenance Manual 1, Lub
Lubrication100 MAINTENANCE MANUALOil Capacity Axle Model Axle ModelDifferentialPints LitersRT-34-140Forward 26,0 12,3Rear 35,0 16,6RT-34-145Forward 2
101Information on Fasteners and its TorquesMAINTENANCE MANUALOnly Models:RT- 40- 160RT- 40- 169RT- 46- 160RT- 46- 164EHRT- 46- 169RT- 46- 16HEHRADIAL
Information on Fasteners and its Torques102 MAINTENANCE MANUALÍtem Description Axle Application SizeTorque ValueLb-Ft N.m1 Output Fork Nut See the Ta
103Information on Fasteners and its TorquesMAINTENANCE MANUALTabelaQ:GeneralTorquesSpecications(Continuation)Ítem Description Axle Application
Information on Fasteners and its Torques104 MAINTENANCE MANUALTabela S: Mounted on Tandem Axles (Track)Axle ModelsRT - 140RT - 145RT - 149RT - 160RT
105SpecicationsAdjustmentsMAINTENANCE MANUALTable U: Drive Pinion Bearings — Preload (See to Section 5)Specication New bearings5-45 lb-in (0.56-5
SpecicationsAdjustments106 MAINTENANCE MANUALTable Z: utput Bearing — Clearance and Preload (See to Section 5)Clearance input axle 0.050-0.200 mm (
107Special ToolsMAINTENANCE MANUALSpecifcationsMounting Bracket to Differential Repairs1 - PLATES 8” (203,2 mm) Long X 3/4”(19,05 mm) THICK X 1-1/4”
Special Tools108 MAINTENANCE MANUALHow to Make a Fork Tool to Detencion1. Measure dimensions A and B of the fork you are servicing. Figure 10.1.2. Cal
Introduction10 MAINTENANCE MANUALAxle Design Variation: Indicates axle design level or variation, (e.g., RS-23-161 has a thicker wall housing than
109Special ToolsMAINTENANCE MANUALSingle Models Tandem ModelsUnitilized Pinion SealSeal poSition Seal toolSDiameter Seat Sealer in the ForkMX-21-160 R
Vehicle Towing Instructions110 MAINTENANCE MANUALHazard Alert MessagesRead and observe all Warning and Caution hazard alert messages in this publicati
111Vehicle Towing InstructionsMAINTENANCE MANUAL7. Release conical washers, if used, of the angeoftheaxleshaf.Figure.FIGURE11.1.8. Identify e
Vehicle Towing Instructions112 MAINTENANCE MANUAL2. Apply the vehicle spring or parking brakes by manually releasing each spring that was compressed b
113Vehicle Towing InstructionsMAINTENANCE MANUALPrevious Tandem Axle, with Driver-Con-trolled Main Differential Lock (DCDL — Bolt-On DCDL Shift Assem
Vehicle Towing Instructions114 MAINTENANCE MANUALBOLT ON SHIFT ASSEMBLYTOP STORAGE HOLE FOR MANUAL ENGAGING CAPSCREWWIREAIR LINEMANUAL ENGAGING CAPSCR
115Vehicle Towing InstructionsMAINTENANCE MANUAL14. Lock or engaged the main differential Cage using the manual engaging methoid.A. Install the manua
Vehicle Towing Instructions116 MAINTENANCE MANUALNote:Install the axle shaft(s) indicated in Table AJ. Axle shafts with a DCDL have a double row of sp
117Vehicle Towing InstructionsMAINTENANCE MANUAL8. Identify each axle shaft that is removed from the axle assembly so they can be installed in the sa
MAINTENANCE MANUALAlways use the Technical Manuals from...
11Removal and DisassemblyMAINTENANCE MANUALHazard Alert MessagesRead and observe all Warning and Caution hazard alert messages in this publication. Th
Always use original parts For more details, see the Spare Parts Catalog Customer service 55 11 3684.674155 11 3684.6867Purchase the CD-ROM failure ana
Removal and Disassembly12 MAINTENANCE MANUAL8.Disconnectthedrivelineuniversaljointfromthepinioninputyokeorangeonthediffer-ential. Figu
13Removal and DisassemblyMAINTENANCE MANUALAir Hammer Vibration Method WARNINGWear safe eye protection when using an air ham-mer. When using power too
Removal and Disassembly14 MAINTENANCE MANUAL5. Remove the output shaft bearing cage cap-screws and washers.6. Pull the bearing cage, bearings and shaf
15Removal and DisassemblyMAINTENANCE MANUALDisasssembly Output Shaft and Bea-ring Cage Assembly1. Remove and discard the original oil seal. Use a new
Removal and Disassembly16 MAINTENANCE MANUAL4. If necessary, remove the output shaft and the bearing cones as an assembly from the output bearing cag
17Removal and DisassemblyMAINTENANCE MANUAL3. Press the output shaft through the bearing cones. Discard the used bearing cones.Bearing Puller Method1.
Removal and Disassembly18 MAINTENANCE MANUAL3.Usethecorrecttooltoholdtheforkorangeof the input shaft. Loosen, but do not remove, the drive
MAINTENANCE MANUALIndex1 - Exploded Views ...042 - I
19Removal and DisassemblyMAINTENANCE MANUALB. For 160 Series differential and 145 Series differential manufactured after September 1998, slowly lift
Removal and Disassembly20 MAINTENANCE MANUAL12. Use a brass drift and hammer to remove the cup of the rear side gear cone from the cage of differentia
21Removal and DisassemblyMAINTENANCE MANUALNOTE:Disassemble the bolted inter-axle differen-tial and inspect the components. The weld-ed inter-axle dif
Removal and Disassembly22 MAINTENANCE MANUALB. Place the assembly on a press so that ex-traction tool it rests on the differential. Figure 3.34.C. Pla
23Removal and DisassemblyMAINTENANCE MANUALRemoval Inter-Axle Differential Lock IAD Shift UnitAir Applied and Spring Release Models, Standard.1. Remov
Removal and Disassembly24 MAINTENANCE MANUALRemoval Driver-Controlled Main Diffe-rential Lock system (DCDL)If the axle is equipped with a driver-contr
25Removal and DisassemblyMAINTENANCE MANUAL7. Use an appropriate lifting device to remove the main differential case and ring gear assembly from the c
Removal and Disassembly26 MAINTENANCE MANUALRemoval Ring Gear from the Differen-tial CaseNOTE:If ring gear needs replaced use the follow-ing procedure
27Removal and DisassemblyMAINTENANCE MANUAL2. Remove the drive pinion from the Cage of differential.A. Place the differential carrier into a press s
Prepare Parts for Reassembly28 MAINTENANCE MANUALHazard Alert MessagesRead and observe all Warning and Caution hazard alert messages in this publicati
29Prepare Parts for ReassemblyMAINTENANCE MANUALClean Ground and Polished Parts1. Use a cleaning solvent, kerosene or diesel fuel to clean ground or p
Prepare Parts for Reassembly30 MAINTENANCE MANUAL CAUTIONA DRIVE PINION AND RING GEAR ARE MA-CHINED AS A MATCHED SET. WHEN YOU REPLACE EITHER A DRIVE
31Prepare Parts for ReassemblyMAINTENANCE MANUAL CAUTIONA THRUST WASHER, DIFFERENTIAL SIDE GEAR AND PINION GEAR ARE MACHINED AS A MATCHED SET. WHEN YO
Prepare Parts for Reassembly32 MAINTENANCE MANUALWelding on Axle Housings WARNINGWear safe clothing and eye protection when you use welding equipment.
33Prepare Parts for ReassemblyMAINTENANCE MANUALDo Not Bend or Straighten a Damaged Drive Axle Housing WARNINGReplace damaged or out-of specicati
Prepare Parts for Reassembly34 MAINTENANCE MANUAL1. Clean the oil and dirt from the outer diameters of the bearing cups and bearing bores in the diffe
35Prepare Parts for ReassemblyMAINTENANCE MANUAL11. Install two long studs in the differential to guide the differential into the housing.12. Immediat
Prepare Parts for Reassembly36 MAINTENANCE MANUALNOTE: Meritor drive pinions and ring gears are only available as matched sets. Each gear in a set has
37Prepare Parts for ReassemblyMAINTENANCE MANUALHypoid Gear Set Ratios Listed on theIdenticationTags1.Locatethe identicationtags rivetedtoth
Prepare Parts for Reassembly38 MAINTENANCE MANUAL• If the positions of the tire marks are morethan3.6 degrees from each other: Check to the
3 MAINTENANCE MANUALNotesAbout This ManualThis manual provides maintenance and service information for theMeritor forward tandem drive axles, includin
39Prepare Parts for ReassemblyMAINTENANCE MANUAL• Iftheaxleratiosshownontheidenticationtags are not within one percent of each oth-er: See t
Prepare Parts for Reassembly40 MAINTENANCE MANUAL2. Use a correct yoke installation tool to install the yoke.3. As you install the fork, you should de
41Assembly and InstallationMAINTENANCE MANUALHazard Alert Messages Read and observe all Warning and Caution hazard alert messages in this publication.
Assembly and Installation42 MAINTENANCE MANUAL3.Ifyoucan’tndthePCnumberorit’sunread-able, install a new shim pack of the same thickness tha
43Assembly and InstallationMAINTENANCE MANUALThe preload of the bearings on the drive pin-ion is controlled by a spacer between the outer bearing cone
Assembly and Installation44 MAINTENANCE MANUAL5. If removed, install the outer bearing cap for the drive pinion.A. Place the differential caser in the
45Assembly and InstallationMAINTENANCE MANUAL1. Place the differential case in the press so that the threaded end of the pinion is UP. Place supports
Assembly and Installation46 MAINTENANCE MANUAL6. Place a protector in the head of the drive pinion. Use a press to install the pinion into the differe
47Assembly and InstallationMAINTENANCE MANUAL14. Use a press and a sleeve to press the shaft of the drive pinion out of the outer bearing cone. Do not
Assembly and Installation48 MAINTENANCE MANUAL22. Install the washer and the nut the drive pin-ion. Prevent the drive pinion assembly from rotating by
Exploded Views4 MAINTENANCE MANUALINPUT WITHOIL PUMP PARTSOIL PUMP PARTSSTANDARD DIFFERENTIAL WITHOUT DIFFERENTIAL LOCK AND WITHOUT OIL PUMPLEFT. SID
49Assembly and InstallationMAINTENANCE MANUAL4. Measure the outer diameter of the washer under the drive pinion. Divide the outer diam-eter of the was
Assembly and Installation50 MAINTENANCE MANUAL1. Expand the ring gear by heating the gear in a tank of water to 160-180°F (71-82°C) for 10 to 15 minut
51Assembly and InstallationMAINTENANCE MANUAL9. Apply axle oil lubricant on the inside surfaces of both case halves, spider or cross, thrust washers,
Assembly and Installation52 MAINTENANCE MANUALA. Install four capscrews and washers or bolts, nuts and washers into the case halves. The distance bet
53Assembly and InstallationMAINTENANCE MANUALInstallation Case Halves and Ring Gear In the Differential 1. If the bearing cones on the main differenti
Assembly and Installation54 MAINTENANCE MANUALFigure 5.34 CAUTIONTHE BEARING CAPS MUST BE CORRECT-LY INSTALLED OR THE ADJUSTING RINGS WILL BE DAMAGED
55Assembly and InstallationMAINTENANCE MANUALNOTE: The roll pins for the adjusting rings are in-stalled after the tooth contact pattern is checked.Dia
Assembly and Installation56 MAINTENANCE MANUALLarge Micrometer Method 1.Hand-tighten the adjusting rings against themain differential bearings.
57Assembly and InstallationMAINTENANCE MANUALRing Gear Runout 1. Attach a dial indicator in the differential case mountingange.Figure5.42.2.Adjus
Assembly and Installation58 MAINTENANCE MANUALAfter checking the tooth contact patterns, the backlashcanbeadjustedwithinthespecica-tion limits,
5Exploded ViewsMAINTENANCE MANUAL01 Nut - Input Fork01A Washer - Input Fork02 Input Fork03 Deector04 Capscrew - Cage-to-Differential Input Sh
59Assembly and InstallationMAINTENANCE MANUALAlways check the tooth contact patterns on the drive side of the gear teeth. Figure 5.49.ExamplesThe foll
Assembly and Installation60 MAINTENANCE MANUAL4. Look at the contact patterns on the ring gear teeth. Compare the patterns to Figure 5.51, Figure 5.52
61Assembly and InstallationMAINTENANCE MANUAL5. Change the thickness of the shim pack be-tween the pinion inner bearing cap and the differential case
Assembly and Installation62 MAINTENANCE MANUALIf the differential has cotter pins or cap-screws, lock the adjusting rings only with cotter pins or cap
63Assembly and InstallationMAINTENANCE MANUAL5.Tightenthejamnut,ifequipped,tothecor-rect torque value against the differential case. See the
Assembly and Installation64 MAINTENANCE MANUAL2. Inspect the shift shaft for damage. If neces-sary, replace the shift shaft.3. If removed, install ne
65Assembly and InstallationMAINTENANCE MANUALA. Apply axle lubricant to the inner bore of the bearing cage or the outer diameter of the new oil seal.
Assembly and Installation66 MAINTENANCE MANUAL CAUTIONON EARLY DESIGN FORWARD DIFFEREN-TIAL , VERIFY THAT THE DRIVE FLATS IN THE BORE OF THE PUMP ARE
67Assembly and InstallationMAINTENANCE MANUALE. Install the input bearing cage over the input shaft on the oil pump.• Ifdowelpinsareused,verify
Assembly and Installation68 MAINTENANCE MANUAL10. If disassembled, assemble the inter-axle differential.A. Apply axle lubricant to all of the inter-a
Exploded Views6 MAINTENANCE MANUALITEM Description ITEM Description65 Nut — Ring Gear (145 and 160 Series)66 Sensor Switch — Main Differential L
69Assembly and InstallationMAINTENANCE MANUALNOTE: The shim pack under the input bear-ing cage is installed after the clearanceof the input bearing is
Assembly and Installation70 MAINTENANCE MANUAL1.Install the capscrews, but not the washers, that fasten the input shaft bearing cage to the differenti
71Assembly and InstallationMAINTENANCE MANUALFigure 5.86Figure 5.879. Inspect the clearance operation of the input shaft assembly.A. Rotate the input
Assembly and Installation72 MAINTENANCE MANUALFigure 5.88Figure 5.89Figure 5.90Figure 5.91Installation Driver-Controlled Main Diffe-rential Lock See t
73Assembly and InstallationMAINTENANCE MANUALInspection Adjust of the clearance of the Output shaft BearingsThe clearance the output shaft bearing is
Assembly and Installation74 MAINTENANCE MANUAL CAUTIONINSPECT THE AXLE BREATHER FOR CON-TAMINANTS, SUCH AS DIRT, LUBRICATION OR DEBRIS, WHICH CAN CAUS
75Assembly and InstallationMAINTENANCE MANUAL6. Position the installation tool and seal. Figure 5.95.• IfyouusetheR4422401tooltoinstallafor-
Assembly and Installation76 MAINTENANCE MANUALNOTE: The unitized seal features a rubber inner sleeve that is designed to seal and ro-tate with the for
77Assembly and InstallationMAINTENANCE MANUALTight Fit Forks and POSE™ Seal .1. Apply axle lubricant to the hub of the fork or ange.Figure5.98.2. V
Assembly and Installation78 MAINTENANCE MANUALOutput Flange fork or Oil Sealer Box Output Shaft Bearings. CAUTIONHOLD THE SEAL ONLY ON THE OUTER DIAME
7Exploded ViewsMAINTENANCE MANUALCURRENT DCDLNO SPIN® ASSEMBLYANTERIOR DESIGN DCDLOIL PUMPRIGHT. SIDEMAIN DIFFERENTIAL CASEMLAIN DIFFFERENTIALWITHOUT
79Assembly and InstallationMAINTENANCE MANUAL CAUTIONUSE A PRESS AND A SLEEVE OR FORK IN-STALLATION TOOL TO INSTALL THE FORK. DO NOT USE A HAMMER OR M
Assembly and Installation80 MAINTENANCE MANUAL6. On an axle with a driver-controlled main dif-ferential lock, shift the lock into and hold the lock in
81Assembly and InstallationMAINTENANCE MANUAL14.Adjusttheshiftforkfortheinter-axlediffer-ential lock. The movement of the shift fork is contr
Assembly and Installation82 MAINTENANCE MANUAL18.If removed, install the oil lter adapter ofthe differential housing. Use Meritor adhe-sive
83Assembly and InstallationMAINTENANCE MANUAL5. Iftheaxleshaftangehavecylindricalholeforscrew mounting, install the screws and wash-ers in
Assembly and Installation84 MAINTENANCE MANUALCylindrical Holes, Nuts and Washers 1. Clean the mounting surfaces of the axle shaft and wheel hub.2. If
85Assembly and InstallationMAINTENANCE MANUALFill the Axle with Lubricant NOTE: For additional lubrication information, See the Maintenance Manual 1,
Driver-Controlled Main Differential Lock86 MAINTENANCE MANUALHazard Alert MessagesRead and observe all Warning and Caution hazard alert messages in th
87Driver-Controlled Main Differential LockMAINTENANCE MANUALEngagement or Lockout of the DCDL WARNINGDuring DCDL disassembly or differential re-mov
Driver-Controlled Main Differential Lock88 MAINTENANCE MANUAL10.Install the manual engaging capscrew into the threaded hole in the center of the cylin
Introduction8 MAINTENANCE MANUALRT-160 SERIES SHOWNIntroductionDescriptionForward Tandem AxleThe inter axle differential (IAD) is located be-hind the
89Driver-Controlled Main Differential LockMAINTENANCE MANUALDifferential and Gear Assembly and Main Differential LockThreaded DCDL Shift AssemblyThe c
Driver-Controlled Main Differential Lock90 MAINTENANCE MANUAL9. Pull the shift shaft from the fork and out of the differential. Figure 6.10.10. Remove
91Driver-Controlled Main Differential LockMAINTENANCE MANUALNOTE:Some models use silastic seal instead of theatwasherinStepE.Also,arollpini
Driver-Controlled Main Differential Lock92 MAINTENANCE MANUAL2. Compress the shift shaft spring as required and install it between the back of the for
93Driver-Controlled Main Differential LockMAINTENANCE MANUAL10. Engage the splines of the collar with the splines of the main differential case. Inser
Driver-Controlled Main Differential Lock94 MAINTENANCE MANUAL1. On differential models with shift fork roll pins, install the two roll pins into the
95Driver-Controlled Main Differential LockMAINTENANCE MANUAL9. Lubricate the O-ring with axle lubricant. Install the O-ring into its groove on the pi
Driver-Controlled Main Differential Lock96 MAINTENANCE MANUAL16. Connect a volt-ohm meter to the sensor switch. Select ohms on the meter. Rotate the s
97Driver-Controlled Main Differential LockMAINTENANCE MANUAL5. Install the differential into the housing. See the Section 5.6. Install and tighten t
Driver-Controlled Main Differential Lock98 MAINTENANCE MANUAL7. Install the differential as s embl y into the housing. See the Section 5.8. Install
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