2011/05/05 Caterpillar

Telehandler:

TH62 (S/N: 4TM1-UP; 3LN1-UP)

TH63 (S/N: 5WM1-UP; 3NN1-UP)

TH82 (S/N: 3JN1-UP; 3KN1-UP)

TH83 (S/N: 3RN1-UP)

Service Magazine SEPD1276, 5 September 2011, "Updated Ring And Pinion Gear Sets For Improved Service Life". Disregard the existing article. Refer to the following information.

Description of Change: The ring and pinion gears have been updated in the telehandlers. The following charts clarify the machines that must be serviced with a specific gear set.

Table 1

Original Factory Configuration
Factory	PIN: No.	Front Axle	Gear Set	Rear Axle	Ratio (Diff.) Gear Set	(F/drive)
Original Axles	S/N:3LN1-652	119-0676 S/N:4TM1-912	137-2542	119-0677	137-2542	7:36 4:25

Note: There have been many changes to the serial number ranges in the following chart. Identify the bevel sets that are needed for the update. Check your gear ratio and use the chart in order to identify the bevel gear set that matches the ratio.

Table 2

The Bevel Pinion Gear Sets are Direct Replacements for the Specific Ratios
PIN: Numbers of TH82 Machines	Ratio	Front Axle Bevel Set	Rear Axle Bevel Set
S/N:3LN1-652 S/N:4TM1-912	8:41	146-4091	146-4090
	7:31	161-6479	161-6481

Note: The installation of the new bevel gear groups to the front differential and the rear differential will ensure that the proper gear ratio's is matched.

Note: Field replacement for the following machines can use the bevel sets identified as a direct replacement.

Table 3

The Bevel Sets in this Chart are the Direct Replacement Parts in Order to Satisfy the Update to the Following Machines
Machine	PIN: Number	Front Axle Bevel Set	Rear Axle Bevel Set
TH62	S/N:3LN653-UP S/N:4TM913-UP	161-6479	161-6481
TH63	S/N:3NN1-UP S/N:5WM1-UP
TH82	S/N:3KN1-UP S/N:3JN1-UP
TH83	S/N:3RN1-UP