JLG G6-42P Service Manual - Manual (Page 322)

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Section 4
Assembly and Installation
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.
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.
Figure 4.23
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 Inches mm
1.
Old shim pack thickness 0.030 0.76
Old PC number, PC+2 (+0.05mm) –0.002 –0.05
Standard shim pack thickness 0.028 0.71
New PC number, PC+5 (+0.13mm) +0.005 +0.13
New shim pack thickness 0.033 0.84
2.
Old shim pack thickness 0.030 0.76
Old PC number, PC–2 (–0.05mm) +0.002 +0.05
Standard shim pack thickness 0.032 0.81
New PC number, PC+5 (+0.13mm) +0.005 +0.13
New shim pack thickness 0.037 0.94
3.
Old shim pack thickness 0.030 0.76
Old PC number, PC+2 (+0.05mm) –0.002 –0.05
Standard shim pack thickness 0.028 0.71
New PC number, PC–5 (–0.13mm) –0.005 –0.13
New shim thickness 0.023 0.58
4.
Old shim pack thickness 0.030 0.76
Old PC number, PC–2 (–0.05mm) +0.002 +0.05
Standard shim pack thickness 0.032 0.81
New PC number, PC–5 (–0.13mm) –0.005 –0.13
New shim pack thickness 0.027 0.68