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TP-9579B
Revised 12-09

16579

Page 4

© Copyright Meritor Automotive, Inc., 2009

Printed in the USA

10. Remove the tapered dowels, the axle shafts 

and gaskets (if used). 

Figure 4

11. Remove the remaining axle shaft(s) as 

necessary from the axle(s) that will remain on 
the road when the vehicle is transported 
according to Table A. 

12. Install a cover over the open end of each hub 

where an axle shaft was removed. This will 
prevent dirt from entering the bearing cavity 
and minimize loss of lubricant.  

NOTE: 

If an air supply will be used for the brake 

system of the transported vehicle, continue with 
Steps 13 and 14, otherwise continue with Step 15.  

13. Connect an auxiliary air supply to the brake 

system of the vehicle that is being transported. 
Before moving the vehicle, charge the brake 
system with the correct amount of air pressure 
to operate the brakes. Refer to the instructions 
supplied by the manufacturer of the vehicle for 
procedures and specifications. If an auxiliary 
air supply is not used, continue with Step 15.  

14. When the correct amount of air pressure is in 

the brake system, release the parking brakes of 
the vehicle that is being transported. Step 15 is 
not required.  

WARNING

When you work on a spring chamber, carefully 
follow the service instructions of the chamber 
manufacturer. Sudden release of a compressed 
spring can cause serious personal injury.

15. If there are spring (parking) brakes on the 

axle(s) that will remain on the road when the 
vehicle is transported, and they cannot be 
released by air pressure, manually compress 
and lock each spring so that the brakes are 
released. Refer to the manufacturer’s 
instructions.  

After Towing or 
Drive-Away (Piggybacking)  

WARNING

To prevent serious eye injury, always wear safe eye 
protection when you perform vehicle maintenance 
or service.

WARNING

Engage the parking brake to prevent the vehicle 
from moving before you begin maintenance or 
service procedures that require you to be under 
the vehicle. Serious personal injury can result.

1.

If an auxiliary air supply was used, apply the 
vehicle parking brakes using the switch inside 
the cab of the vehicle. If an auxiliary air supply 
was not used, begin with Step 2.  

WARNING

When you work on a spring chamber, carefully 
follow the service instructions of the chamber 
manufacturer. Sudden release of a compressed 
spring can cause serious personal injury.

2.

Apply the vehicle spring (parking) brakes by 
manually releasing each spring that was 
compressed before transporting started. Refer 
to manufacturer’s instructions.  

3.

Disconnect the auxiliary air supply, if used, 
from the brake system of the vehicle that was 
transported. Connect the vehicle’s air supply to 
the brake system.  

4.

Remove the covers from the hubs.  

NOTE: 

Install the axle shafts indicated in 

Table B

Axle shafts with a DCDL have a double row of 
splines that engage with splines of the side gear 
and of the shift collar in the differential case. 

Figure 7

. Continue with Step 5.  

NOTE: 

Make sure to engage the axle shaft splines 

for the differential side gear and the shift collar. 
They must be fully engaged.

5.

Install the gasket, if used, and axle shaft into 
the axle housing and carrier in the same 
location it was removed from. The gasket and 
flange of the axle shaft must be flat against the 
hub. Rotate the axle shaft and/or the driveline 
as necessary to align the splines and the holes 
in the flange with the studs in the hub. 

Figure 4

6.

Install the dowels, if used, over each stud and 
into the tapered holes of the flange. 

Table B 

Single Axles

Remove both axle shafts. 

Tandem Axles

Forward Axle (Towing from Front):

 

No need to remove axle shafts.

Forward Axle (Towing from Rear):

 

Remove both axle shafts.

Rear Axle (Towing from Front): 

Remove both axle shafts.

Rear Axle (Towing from Rear): 

No need to remove axle shafts.

Summary of Contents for TP-9579

Page 1: ...9579A Axle Preparation Instructions for Vehicle Towing or New Vehicle Drive Away Piggybacking Single axle without DCDL Tandem axle without DCDL with IAD TP 9579B Axle Preparation Instructions for Vehi...

Page 2: ......

Page 3: ...ase gearing and axle shafts together This feature maximizes traction to both wheels The lock position will also protect against spinout damage to the differential The DCDL should not be actuated when...

Page 4: ...n the DCDL is fully locked the vehicle will have an understeer condition when making turns Proceed cautiously over poor road or highway conditions NEVER exceed 25 mph and use good driving judgment Unl...

Page 5: ...trolled 2 The IAD switch should be in the UNLOCK position for normal operating conditions where there is good traction 3 Lock the IAD when approaching or anticipating icy or poor driving conditions to...

Page 6: ...All Rights Reserved 16579 Driver Instructions Locking the IAD When encountering poor road or highway conditions where a decrease in traction is anticipated follow the recommended procedures 1 Let up...

Page 7: ...Drivers may lock BOTH the IAD and the DCDL for maximum traction under icy snowy or poor road conditions However when using both of these traction enhancement devices or the DCDL alone vehicle speed m...

Page 8: ...low speed range to allow the differential to lock 2 Let up momentarily on the accelerator to relieve torque on the gearing allowing the differential to lock 3 When the differential lock is activated...

Page 9: ...ntial lock is deactivated the indicator light will be off or the audible signal will stop 4 Resume driving at normal speed using good driving judgment Unlocking the IAD When poor road or highway condi...

Page 10: ...fect at the time the publication was approved for printing and is subject to change without notice or liability Meritor Heavy Vehicle Systems LLC reserves the right to revise the information presented...

Page 11: ...lowing procedure Before Towing or Drive Away Piggybacking WARNING To prevent serious eye injury always wear safe eye protection when you perform vehicle maintenance or service WARNING Engage the parki...

Page 12: ...ansporting or repair is completed Example Match mark a mating axle shaft and hub 8 Remove the tapered dowels gasket if used and the axle shaft from the axle assembly Figure 1 9 Install a cover over th...

Page 13: ...e hubs NOTE Continue with Steps 5 7 to install all axle shafts 5 Install the gasket if used and axle shaft into the axle housing and carrier in the same location it was removed from The gasket and fla...

Page 14: ...e the publication was approved for printing and is subject to change without notice or liability Meritor Heavy Vehicle Systems LLC reserves the right to revise the information presented or discontinue...

Page 15: ...rive Away Piggybacking WARNING To prevent serious eye injury always wear safe eye protection when you perform vehicle maintenance or service WARNING Engage the parking brake to prevent the vehicle fro...

Page 16: ...are not aligned Damage to the threads of the cylinder and capscrew will result To align the splines continue with Steps e and f d Turn the capscrew to the right until the head is approximately 0 25 to...

Page 17: ...ch 38 1 mm diameter brass hammer can be used as a drift a Hold a 1 5 inch 38 1 mm diameter brass drift against the center of the axle shaft flange INSIDE THE ROUND DRIVING LUGS Figure 5 b Hit the end...

Page 18: ...service WARNING Engage the parking brake to prevent the vehicle from moving before you begin maintenance or service procedures that require you to be under the vehicle Serious personal injury can res...

Page 19: ...EARINGS SHIFT ASSEMBLY SCREW IN STYLE THREADED SHIFT COLLAR AXLE SHAFT SPLINES TAPERED ROLLER BEARING DIFFERENTIAL CASE BEVEL DIFFERENTIAL GEARS HOUSING TAPERED ROLLER BEARING STRAIGHT ROLLER BEARING...

Page 20: ...engaging capscrew from the shift assembly 9 Install the manual engaging capscrew into the storage hole The storage hole of threaded shift assemblies is located in the shift tower of the carrier next...

Page 21: ...Drive Away Piggybacking WARNING To prevent serious eye injury always wear safe eye protection when you perform vehicle maintenance or service WARNING Engage the parking brake to prevent the vehicle fr...

Page 22: ...age to the threads of the cylinder and capscrew will result To align the splines continue with Steps e and f d Turn the capscrew to the right until the head is approximately 0 25 to 0 50 inch 6 4 to 1...

Page 23: ...inch 38 1 mm diameter brass hammer can be used as a drift a Hold a 1 5 inch 38 1 mm diameter brass drift against the center of the axle shaft flange INSIDE THE ROUND DRIVING LUGS Figure 5 b Hit the e...

Page 24: ...or service WARNING Engage the parking brake to prevent the vehicle from moving before you begin maintenance or service procedures that require you to be under the vehicle Serious personal injury can...

Page 25: ...AFT DOUBLE ROW OF SPLINES SHIFT COLLAR AND DIFF CASE SPLINES ENGAGED LOCKED SIDE GEAR DIFFERENTIAL CASE SINGLE AXLE OR REAR AXLE OFTANDEM Shown with bolted on shift assembly Shown in the locked engage...

Page 26: ...Install the manual engaging capscrew into the storage hole The storage hole of bolted on shift assemblies is located in the top side of the shift cylinder cover Tighten to 15 25 Ib ft 20 35 N m Figur...

Page 27: ...ssembly are locked together When the carrier operates with the differential lock ENGAGED there is no differential action between the wheels of the axle When the carrier is operated with the differenti...

Page 28: ...plunger must be the type that is held in by air pressure and automatically releases when the air pressure is discontinued Use a Midland valve KNZ 0031 KNZ 0033 or equivalent 5 Connect an air line from...

Page 29: ...4 5 7 8 6 REAR REAR TANDEM AXLE DCDL INSTALLATION FUSE INDICATOR LIGHT 12 V ELECTRIC DRIVER CONTROL PLUNGER AIR SUPPLY TANK TRANSMISSION 1 4 AIR SERVICE TRANS LOW RANGE CONTROL VALVE 1 4 AIR CONTROL D...

Page 30: ...e the publication was approved for printing and is subject to change without notice or liability Meritor Heavy Vehicle Systems LLC reserves the right to revise the information presented or to disconti...

Page 31: ......

Page 32: ...ffect at the time the publication was approved for printing and is subject to change without notice or liability Meritor Heavy Vehicle Systems LLC reserves the right to revise the information presente...

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