- Track-Type Tractor:
- D8N (S/N: 9TC1-UP; 1XJ1-UP; 5TJ1-UP; 7TK1-UP)
- D8R Series II (S/N: AKA1213-UP; 6YZ325-329 and 331-UP)
- D8R (S/N: 7XM5094-UP; 9EM1213-UP)
Description of Change: Idler guards are available for the front and the rear idler on the D8R and D8N Track-Type Tractor. Idler guards extend the life of links, rollers, and idlers by reducing the recirculation of dirt in the undercarriage. Idler guards reduce compaction of material in the undercarriage. Less compaction helps maintain proper loose track adjustment. This also reduces the chance of galling of the tracks. Idler guards help the front, the middle and rear rollers to wear more evenly. This reduces the need for the rollers to be rotated between the front position, the rear position, and the middle position.
Adaptable To: Idler guards directly bolt onto the D8R (S/N: AKA1213-UP; 6YZ325-329 and 331-UP; 7XM5094-UP; 9EM1213-UP). Parts are available for retrofitting the rear idler guards on the D8N (S/N: 5TJ1-UP; 1XJ1-UP; 9TC1-UP; 7TK1-UP).
Installation of Idler Guards
The following instructions describe the basic procedure for the installation of idler guards. Make sure that you understand the instruction before you complete this procedure.
Safety
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Personal injury or death can result from improper lifting or blocking. When a hoist or jack is used to lift any part or component, stand clear of the area. Be sure the hoist or jack has the correct capacity to lift a component. Install blocks or stands before performance of any work under a heavy component. Approximate weights of the components are shown. Clean all surfaces where parts are to be installed. |
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Personal injury can result from flame cutting or welding on painted areas. The effect of gasses from burned paint is a hazard to the person doing the cutting or welding. Do not flame cut or weld on painted areas. |
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Personal injury or death can result from fumes, gases and ultraviolet rays from the weld arc. Welding can cause fumes, burn skin and produce ultraviolet rays. Keep your head out of the fumes. Use ventilation, exhaust at the arc, or both, to keep fumes and gases from your breathing area. Wear eye, ear and body protection before working. Protect yourself and others; read and understand this warning. Fumes and gases can be dangerous to your health. Ultraviolet rays from the weld arc can injure eyes and burn skin. Electric shock can cause death. Read and understand the manufacturer's instructions and your employer's safety practices. Do not touch live electrical parts. See "American National Standard Z49.1, Safety in Welding and Cutting" published by the American Welding Society. American Welding Society2501 N.W. 7th Street Miami, Florida 33125 See "OSHA Safety and Health Standards, 29 CFR 1910", available from U.S. Department of Labor. U.S. Department of LaborWashington, D.C. 20210 |
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Necessary parts
| Idler Guards | |||
|---|---|---|---|
| Item | Part Number | Description | Qty |
| 1 | 155-2742 | Guard As | 4 |
| 2 | 163-2415 | Guard As | 2 |
| 3 | 155-2754 | Plate | 2 (1) |
| 4 | 7X-0345 | Bolt | 12 |
| 5 | 8T-4122 | Hard Washer | 18 (2) |
| 6 | 8T-6871 | Bolt | 6 (3) |
| 7 (4) |
163-2415 | Guard As | 2 |
| 8 (5) |
155-2757 | Bar | 4 |
| 9 (5) |
155-2756 | Bar | 2 |
| ( 1 ) | If you are installing the front idler guards on the D8R (S/N: AKA1213-UP; 6YZ325-329 and 331-UP; 7XM5094-UP; 9EM1213-UP), order four plates. |
| ( 2 ) | If you are installing front idler guards on the D8R (S/N: AKA1213-UP; 6YZ325-329 and 331-UP; 7XM5094-UP; 9EM1213-UP), order twenty-four hard washers. |
| ( 3 ) | If you are installing the front idler guards on the D8R (S/N: AKA1213-UP; 6YZ325-329 and 331-UP; 7XM5094-UP; 9EM1213-UP), order twelve bolts. |
| ( 4 ) | Only use the item for installing front idler guards on the D8R (S/N: AKA1213-UP; 6YZ325-329 and 331-UP; 7XM5094-UP; 9EM1213-UP). |
| ( 5 ) | Only use the item for retrofitting the rear guards on the D8N (S/N: 5TJ1-UP; 1XJ1-UP; 9TC1-UP; 7TK1-UP) . |
Installation procedure for Rear Idler Guard
- If your machine does not have bars (8) and (9), weld bars (8) and (9) to roller frame (D). Refer to Illustration 1 and Table 2 for additional information.
Show/hide table
Table 2 Rear Idler Guard Item D8N (S/N: 5TJ1-UP; 1XJ1-UP; 9TC1-UP; 7TK1-UP) A
178 ± 1.5 mm (7.008 ± 0.06 inch)B
91 mm (3.583 inch)C
35 mm (1.38 inch)
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| Illustration 1 | g01018161 |
Note: If you are installing the rear idler guards on the D8N (S/N: 5TJ1-UP; 1XJ1-UP; 9TC1-UP; 7TK1-UP), complete Step 1.
- Install two guards (1) on rear roller frame (D).
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| Illustration 2 | g01018159 |
Note: If your machine is ready for idler guards, complete the remaining steps.
- Install six bolts (4) and washers (5) in order to attach guards (1) to rear roller frame (D) .
- Approximate torque for bolts (4) is 215 ± 40 N·m (160 ± 30 lb ft).
- Install rear guard assembly (2) on rear roller frame (D) .
- Install plate (3) to guard assembly (2) .
- Install three bolt (6) and three washers (5) in order to attach guard assembly (2) and plate (3) to rear roller frame (D) .
- Torque bolts (6) to 115 ± 20 N·m (85 ± 15 lb ft).
- Repeat Steps 2 through Steps 8 on the opposite track roller frame.
Installation Procedure for Front Idler guard
Note: If you are installing idler guards on the D8N (S/N: 5TJ1-UP; 1XJ1-UP; 9TC1-UP; 7TK1-UP), a retrofit kit is not available for the front idler guards. Idler guards may not be installed on the front Idlers.
- Install front guard assembly (7) on front roller frame (E) .
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| Illustration 3 | g01018160 |
- Install plate (3) to guard assembly (7) .
- Install three bolt (6) and three washers (5) in order to attach guard assembly (7) and plate (3) to front roller frame (E) .
- Torque bolts (6) to 115 ± 20 N·m (85 ± 15 lb ft).
- Repeat Steps 1 through 4 on the opposite track roller frame.