JLG GRADALL 522D Owner's/Operator's Manual page 120

Se c t ion 4
Asse m bly a nd I nst a lla t ion
2. Record the pinion cone (PC) variation number on
the old drive pinion that is being replaced. If the
PC variation number cannot be located, assemble
the gear set with the shim pack found in step 1.
Figure 4.23.
Figure 4.23
NOTE
The pinion cone number (PC) can be either
1,000ths of an inch (0.000 inch) or 100ths of a
millimeter (0.00 mm). Examples:
PC+3, PC–3, +3 OR -3 = .003 inch (.076 mm)
PC+.03, PC–.03MM , + .03 OR –.03 = .03 mm
•
To change inches to millimeters, multiply
inches by 25.40
•
To change millimeters to inches, multiply
millimeters by 0.039.
3. If the old pinion cone number is a plus (+),
subtract the number from the old shim pack
thickness that was measured in step 2.
4. If the old pinion cone number is a minus (–), add
the number to the old shim pack thickness that
was measured in step 2.
NOTE
The value calculated in step 3 or 4 is the thick-
ness of the standard shim pack without a
variation.
5. Look at the pinion cone (PC) variation number on
the new drive pinion that will be installed. Record
the number for later use.
6. If the new pinion cone number is a plus (+), add
the number to the standard shim pack thickness
that was calculated in step 3 or 4.
30
7. If the new pinion cone number is a minus (–),
subtract the number from the standard shim pack
thickness that was calculated in step 3 or 4.
NOTE
The value calculated in step 6 or 7 is the thick-
ness of a new shim pack that will be installed.
EXAMPLES
1.
Old shim pack thickness
Old PC number, PC+2 (+0.05mm) –0.002
Standard shim pack thickness
New PC number, PC+5 (+0.13mm) +0.005
New shim pack thickness
2.
Old shim pack thickness
Old PC number, PC–2 (–0.05mm) +0.002
Standard shim pack thickness
New PC number, PC+5 (+0.13mm) +0.005
New shim pack thickness
3.
Old shim pack thickness
Old PC number, PC+2 (+0.05mm) –0.002
Standard shim pack thickness
New PC number, PC–5 (–0.13mm) –0.005
New shim thickness
4.
Old shim pack thickness
Old PC number, PC–2 (–0.05mm) +0.002
Standard shim pack thickness
New PC number, PC–5 (–0.13mm) –0.005
New shim pack thickness
Inches mm
0.030 0.76
–0.05
0.028 0.71
+0.13
0.033 0.84
0.030 0.76
+0.05
0.032 0.81
+0.13
0.037 0.94
0.030 0.76
–0.05
0.028 0.71
–0.13
0.023 0.58
0.030 0.76
+0.05
0.032 0.81
–0.13
0.027 0.68
Courtesy of Crane.Market