Specifications

39
Prepare Parts for Reassembly
MAINTENANCE MANUAL
• Iftheaxleratiosshownontheidentication
tags are not within one percent of each oth-
er: See the vehiclemanufacturer for further
information.
2. Install the inter-axle driveshaft. Refer to the
vehicle manufacturer’s procedures.
3. Install the pinion cover. See the vehicle
manufacturer’s procedures.
4. Remove the safety stands and lower the ve-
hicle.
Verify the Actual Hypoid Gear Set Ratios
You can check the actual hypoid gear set ratios
when you remove the differential assemcbly
from the axle housings for maintenance or re-
pair. See the following procedure to calculate
the actual gear set ratios.
1. Count the number of ring gear teeth. Figure 4.21.
2. Count the number of pinion gear teeth.
Figure 4.21.
3. Divide the number of ring gear teeth by the num-
ber of pinion gear teeth to determine the actual
hypoid gear set ratio for each axle. Figure 4.21.
4. Calculate the percentage difference be-
tween the hypoid gear set ratios using the
equation in Table E. All ratios must match
within one percent.
• If the actual hypoid gear set ratios are not
within one percent of each other: See the
vehicle manufacture for further information.
Inspection Fork General U-Joint
All current Meritor axles feature helical splines
at the fork interface. This feature provides a
tighttbetweentheforkandinputshaft,output
shaft and pinion shaft. For the axle to operate
correctly, the input shaft, output shaft and pin-
ion shaft must t tightly to the corresponding
fork.
Check for Fork Wear
WARNING
Park the vehicle on a level surface. Block the
wheels to prevent the vehicle from moving.
Support the vehicle with safety stands. Do not
workunderavehiclesupportedonlybyjacks.
Jacks can slip and fall over. Serious personal
injuryanddamagetocomponentscanresult.
1. Park the vehicle on a level surface. Block the
wheels to prevent the vehicle from moving.
2.Use a jack to raise the vehicle so that the
wheels to be serviced are off the ground.
Support the vehicle with safety stands.
3. Remove the driveline.
4. Remove the input, output or pinion shaft nut.
5. Attempt to remove the fork by hand.
• Ifyoucanremovetheforkbyhand:Thefork
is worn.Replace the fork e
6. Use a correct fork puller tool to remove the
fork.
Check for a adjustment Condition
NOTE:
Youcancheckforaadjustmenttcondition
when you install any serviceable fork
1. Attempt to install the fork by hand.
• Iftheyokebottomsoutagainsttheadjacent
bearing:Replace the yoke.
Figure 4.21
RING GEAR TEETH
=
PINION GEAR TEETH
ACTUAL HYPOID
GEAR SET RATIO
PINION GEAR TEETH
RING GEAR TEETH