Meritor MS1913X - Dry Fit Drive Pinion Assembly

5 Assembly and Installation
25
Meritor Maintenance Manual MM-15103 (Issued 07-17)
Figure 5.2
2. Find the pinion cone (PC) variation number on the drive pinion
you’ll replace. Record the number. Figure 5.3. The pinion cone
number can be one of the following formats.
앫 PC +6, PC –6, +6 or –6 = 0.006-inch
앫 PC +.15, PC 0.15 mm, +0.15 mm or –0.15 = 0.15 mm
Figure 5.3
3. If you can’t find the PC number or it’s unreadable, install a new
shim pack of the same thickness that you measured in Step 1.
4. If the old pinion cone number is a plus (+), ADD the cone
number to the old shim pack thickness that was measured in
Step 1.
5. If the old pinion cone number is a minus (–), SUBTRACT the
cone number from the old shim pack thickness that was
measured in Step 1.
6. Find the pinion cone variation number on the new drive pinion
that will be installed. Record the number.
7. If the new pinion cone number is a plus (+), SUBTRACT the
number from the standard shim pack thickness that was
calculated in Step 4 or Step 5. Use new shims to make a shim
pack to the determined thickness. Refer to Table A.
8. If the new pinion cone number is a minus (–), ADD the number
to the standard shim pack thickness that was calculated in
Step 4 or Step 5. Use new shims to make a shim pack to the
determined thickness. Refer to Table A.
Table A:
Assembly
“Dry Fit”Assembly of the Drive Pinion to
Verify Shim Pack
NOTE: For initial assembly to verify the shim pack, the spacers are
not installed. For final assembly, the spacers are installed and
preload must be established.
Figure 5.2
Figure 5.3
1002764a
PINION CONE
VARIATION
NUMBER
1003032d
Examples Inches mm
1. Old Shim Pack Thickness
Old PC Number, PC +2
Standard Shim Pack Thickness
New PC Number, PC +5
New Shim Pack Thickness
0.030
+ 0.002
= 0.032
– 0.005
= 0.027
0.760
+ 0.050
= 0.810
– 0.120
= 0.690
2. Old Shim Pack Thickness
Old PC Number, PC –2
Standard Shim Pack Thickness
New PC Number, PC +5
New Shim Pack Thickness
0.030
– 0.002
= 0.028
– 0.005
= 0.023
0.760
– 0.050
= 0.710
– 0.120
= 0.590
3. Old Shim Pack Thickness
Old PC Number, PC +2
Standard Shim Pack Thickness
New PC Number, PC –5
New Shim Pack Thickness
0.030
+ 0.002
= 0.032
+ 0.005
= 0.037
0.760
+ 0.050
= 0.810
+ 0.120
= 0.930
4. Old Shim Pack Thickness
Old PC Number, PC –2
Standard Shim Pack Thickness
New PC Number, PC –5
New Shim Pack Thickness
0.030
– 0.002
= 0.028
+ 0.005
= 0.033
0.760
– 0.050
= 0.710
+ 0.120
= 0.830