2007/12/03 Caterpillar

Wheel Tractor-Scraper:

613CSeries II (S/N: KEH1-UP; 8LJ1-UP; 93X1-UP; TJK1-UP)

Service Magazine SEPD0917, 03 December 2007, "New Hardware for Bolted Joint on the Lower Elevator". Disregard this article. See the article that follows.

Description of Change: The service life of the bolted joint at each end of the roller shaft on certain 613C Wheel Tractor-Scrapers is increased with new hardware. The improved joint will minimize the loosening of the joint bolts which will ensure that the hub will be secure.

Adaptable To: The new hardware is adaptable to the following machines:

• 613C Series II (S/N: 8LJ1-3446) Wheel Tractor

• 613C Series II (S/N: 93X2906-5669) Wheel Scraper

The new hardware is effective with the following machines:

• 613C Series II (S/N: 8LJ3447-UP) Wheel Tractor

• 613C Series II (S/N: 93X5670-UP) Wheel Scraper

The new hardware is effective with the following machines:

• 613C Series II (S/N: KEH281-UP) Wheel Tractor

• 613C Series II (S/N: TJK187-UP) Wheel Scraper

Note: The Wheel Tractor serial numbers are listed for reference only. The new hardware applies only to Wheel Scrapers with the elevators that use the 8I-1098 Shaft.

Table 1

Required Tools
Callout	Description	Qty
A	Linear Caliper	1

Table 2

Parts List
Callout	New Part	Description	Former Part	Qty
1	9S-1366	Bolt	0S-1587	6
2	2M-0849	Hard Washer		12
3	312-3594	Special Washer	7J-5279	2
4	312-3593	Shim Pack		2
5	4C-4030	Thread Lock Compound		1

Procedure for Installing the New Hardware

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Illustration 1	g01434214
(6) Locations for supports

1. Support the elevator frame in the middle of the lower portion of the frame (6) in order to free the hubs of external forces.

   Note: Perform the steps below on one side at a time.

2. At the end of the lower roller shaft, remove the existing parts: Bolts (1), Hard Washers (2) and Special Washers (3) .

3. Install the following new parts: Bolts (1), Hard Washers (2) and Special Washers (3). Hold the hub parallel to the ground while you torque the bolts. Torque the bolts to 67 N·m (50 lb ft). Torque the bolts as many cycles as required until the full torque value is achieved.

4. Remove the hardware that was just installed without disturbing the hub.

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Illustration 2	g01434212
View A-A (B) Hub surface to surface of shaft

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Illustration 3	g01435632
View B-B (C) Measure depth (B) here.

5. Perform the following procedure to find the number of shims that are required from the Shim Pack (4). Take the depth from each hub surface to the surface of the shaft. Refer to Illustration 3. Measure Depth (C) with the Linear Caliper (A). Find the average of the three measurements in millimeters. Subtract your answer from 10 mm (0.4 inch). The 10 mm (0.4 inch) value accommodates the depth of the washer set and the setting gap.

6. The difference represents the thickness of shims that are needed from a Shim Pack (4) for the bolted joint on one end of the elevator shaft. The Shim Pack (4) consists of many shims of different thicknesses. Remove shims from the Shim Pack (4) in order to acquire the desired thickness.

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Illustration 4	g01434203
View A-A (1) Bolt (2) Hard washer (3) Special washer (4) Shim pack

7. Place the shims in the bolted joint. Install the following new parts in the bolted joint: Bolts (1), Hard Washers (2) and Special Washers (3). Use Thread Lock Compound (5) on the bolts. Torque the bolts to 105 ± 20 N·m (75 ± 15 lb ft). Torque the bolts as many cycles as required until full torque is achieved and the hub is properly seated on the shaft.