- Wheel Skidders:
- 515 (S/N: 4LR1-UP)
- 525 (S/N: 1DN1-UP)
- 525B (S/N: 3KZ1-UP)
- 535B (S/N: AAE1-UP)
- 545 (S/N: 2FZ1-UP)
- 525 (S/N: 1DN1-UP)
- Wheeled Feller Bunchers:
- 533 (S/N: CDR1-UP)
- 543 (S/N: ASJ1-UP)
Introduction
The following information lists the dimensions of the hitch bore and the dimensions of the bore for the steering cylinders. The part numbers of the bushings are also listed.
This special instruction provides information for repairing frames for the articulated hitch. Worn pin bores and elongated pin bores can be welded and machined to original dimensions. Successful repair depends on the extent of required repair, repair methods and repair quality.
Illustrations in this publication may look different from your machine. While the illustrations are typical, the dimensions are actual.
Note: All dimensions listed are dimensions for manufacturing and assembling a new machine. Do not perform any procedure that is outlined in this publication and do not order any parts until you read and understand this information.
Reference: Refer to Special Instructions, SEHS9595 for additional information on rebuilding the articulated hitch for 518, 518 Series II, 518C, 528, 528B and 530B Wheel Skidders.
Cleaning Procedure
All foreign material (oil, grease, water, paint, rust, dirt and scale) must be removed before any welding operation. These materials displace hydrogen gas when in contact with severe heat. The gas causes weld porosity and weld deposit cracking.
Remove oil and grease with solvent and allow to dry. Remove paint, rust, dirt and scale.
Inspection
Pin bores must be inspected prior to any weld repair. Crack inspection is necessary to prevent any further failure following salvage. Cracking will occur at the thinner sections surrounding the pin bores.
If external cracks are suspected, the part should be inspected using dye penetrant or magnetic particle. Inspection surfaces should be clean and any surface irregularities removed. Surface irregularities can mask indications of unacceptable defects.
Repairable defects should be cut or ground out 6 mm (.24 inch) deeper than the original defect and repaired with weld material.
Machining Elongated Bores
Metal to metal contact of the pin to any frame member can result in material deformation. Deformed material can contain cracks and should be removed. Premachining provides for a concentric bore with a stable base material for weld build-up.
Preheat
If the surrounding temperature is less than 16 °C (61 °F), the bores and adjacent area should be preheated to 95 °C (203 °F)prior to welding to prevent cracking. If the welding process is completed in a reasonable time, no additional preheating should be required. To ensure good weld deposits, the material around the weld area should be 95° ± 10°C (203° ± 18°F)during the welding process.
Welding Process
The 1U-9600 Welding Group is a recommended tool for pin bore weld build-up. Automated welding results in clean and even metal deposition. Weld quality is improved over SMAW and semi-automated GMAW. The recommended weld consumables are shown in the above chart. If the 1U-9600 Welding Group is not utilized, the bores may be built up to size using E7018 SMAW 3.18 mm (.125 inch) diameter electrode, or by the GMAW process. Use the recommended consumables for the bore welder for semi-automatic welding.
Welding Procedure
- Pin bores must be free of all contaminants.
- The bores should be preheated to 95 °C (203 °F).
- Allow the welds to cool slowly after welding the bores.
- Outline the repair area (A) and (B). Make transverse welds (C) in order to complete the buildup.
 | |
| Illustration 1 | g00917924 |
Hitch Dimensions and Steering Cylinder Bracket Dimensions for Wheel Skidders
| Bore | 515(S/N: 4LR) | 525(S/N: 1DN) | 525B(S/N: 3KZ) | 535B(S/N: AAE) | 545(S/N: 2FZ) |
| Bracket for the Head End of the Steering Cylinder | 44.53 ± .04 mm (1.7531 ± .002 inch) |
44.53 ± .04 mm (1.7531 ± .002 inch) |
44.56 ± .05 mm (1.7543 ± .002 inch) |
44.56 ± .05 mm (1.7543 ± .002 inch) |
50.86 ± .04 mm (2.002 ± .002 inch) |
| Bracket for the Rod End of the Steering Cylinder | 44.55 ± .05 mm (1.754 ± .002 inch) (1) |
44.55 ± .05 mm (1.754 ± .002 inch) (1) |
57.047 ± .025 mm (2.246 ± .001 inch) (2) |
57.047 ± .025 mm (2.246 ± .001 inch) (2) |
50.86 ± .05 mm (2.0024 ± 0.0020 inch) |
| Upper Hitch of the Rear Frame | 76.20 ± .03 mm (3.000 ± .001 inch) |
76.20 ± .03 mm (3.000 ± .001 inch) |
76.20 ± .03 mm (3.000 ± .001 inch) |
76.20 ± .03 mm (3.000 ± .001 inch) |
98.45 ± .03 mm (3.876 ± .001 inch) |
| Upper Hitch of the Engine Frame | 82.575 ± .025 mm (3.251 ± .001 inch) |
82.575 ± .025 mm (3.251 ± .001 inch) |
82.575 ± .025 mm (3.251 ± .001 inch) |
82.575 ± .025 mm (3.251 ± .001 inch) |
101.613 ± .025 mm (4.000 ± .001 inch) |
| Lower Hitch of the Rear Frame | 112.662 ± .025 mm (4.435 ± .001 inch) |
112.662 ± .025 mm (4.435 ± .001 inch) |
112.662 ± .025 mm (4.435 ± .001 inch) |
112.662 ± .025 mm (4.435 ± .001 inch) |
139.96 ± .04 mm (5.510 ± .002 inch) |
| Lower Hitch of the Engine Frame (Upper Flange) | 57.18 ± .08 mm (2.251 ± .003 inch) |
57.18 ± .08 mm (2.251 ± .003 inch) |
57.18 ± .08 mm (2.251 ± .003 inch) |
57.18 ± .08 mm (2.251 ± .003 inch) |
98.45 ± .05 mm (3.876 ± .002 inch) |
| Lower Hitch of the Engine Frame (Lower Flange) | 76.23 ± .03 mm (3.001 ± .001 inch) |
76.23 ± .03 mm (3.001 ± .001 inch) |
76.23 ± .03 mm (3.001 ± .001 inch) |
76.23 ± .03 mm (3.001 ± .001 inch) |
98.45 ± .05 mm (3.876 ± .002 inch) |
| Bushing for Rod End of Steering Cylinder | 8J-0278 | 8J-0278 | 8J-0278 | 8J-0278 | 3G-4704 |
| Bushing for Head End of Steering Cylinder | 111-7477 | 111-7477 | 111-7477 | 111-7477 | 3G-4704 |
| Bushing for Upper Hitch of Rear Frame | 6K-2697 | 6K-2697 | 6K-2697 | 6K-2697 | 4K-8659 |
| Bushing for Upper Hitch of Engine Frame | 7K-5192 | 7K-5192 | 7K-5192 | 7K-5192 | 5K-0894 |
| Bushing for the Pin Bore of the Steering Cylinder of the Rear Frame | 6K-6044 (1) | 6K-6044 (1) | 6K-6044 (2) | 6K-6044 (2) | N/A |
| ( 1 ) | The 515 Wheel Skidder and the 525 Wheel Skidder did not use the 6K-6044 Sleeve Bearing in production. The 156-4368 Bracket Assembly are serviceable. The brackets may be line bored to a diameter of 57.047 ± .025 mm (2.246 ± .001 inch). The 6K-6044 Sleeve Bearing can then be installed. |
| ( 2 ) | The 525B (S/N: 3KZ1-474) Wheel Skidder and the 535B (S/N: AAE1-527)Wheel Skidder did not use the 6K-6044 Sleeve Bearing in production. The steering brackets are serviceable. The brackets may be line bored to a diameter of 57.047 ± .025 mm (2.246 ± .001 inch). The 6K-6044 Sleeve Bearing can then be installed. |
Locations of the Bores in the Frame for the Steering Cylinders for Wheel Skidders
 | |
| Illustration 2 | g00917995 |
| Location of the Bore for the Steering Cylinder | 515(S/N: 4LR) | 525(S/N: 1DN) | 525B(S/N: 3KZ) | 535B(S/N: AAE) | 545(S/N: 2FZ) |
| A | 508.5 mm (20.019 inch) |
508.5 mm (20.019 inch) |
556.3 mm (21.902 inch) |
556.3 mm (21.902 inch) |
556 mm (21.889 inch) |
| B | 869.5 mm (34.232 inch) |
869.5 mm (34.232 inch) |
853 mm (33.583 inch) |
853 mm (33.583 inch) |
854.5 mm (33.641 inch) |
| C | 84.9 mm (3.342 inch) |
84.9 mm (3.342 inch) |
82.6 mm (3.252 inch) |
82.6 mm (3.252 inch) |
75.3 mm (2.965 inch) |
| D | 277.8 mm (10.937 inch) |
277.8 mm (10.937 inch) |
280.7 mm (11.0512 inch) |
280.7 mm (11.051 inch) |
277.8 mm (10.937 inch) |
Hitch Dimensions and Steering Cylinder Bracket Dimensions for Feller Bunchers
| Bore | 533 | 543 |
| Bracket for the Steering Cylinder on the Engine End of the Frame | 50.86 ± .04 mm (2.0024 ± 0.0016 inch) |
50.86 ± .04 mm (2.0024 ± 0.0016 inch) |
| Bracket for the Steering Cylinder on the Front Frame | 50.86 ± .04 mm (2.0024 ± 0.0016 inch) |
50.86 ± .04 mm (2.0024 ± 0.0016 inch) |
| Upper Hitch of the Engine End of the Frame | 101.613 ± .025 mm (4.0005 ± 0.0010 inch) |
101.613 ± .025 mm (4.0005 ± 0.0010 inch) |
| Upper Hitch of the Front Frame | 98.45 ± .05 mm (3.8760 ± 0.0020 inch) |
98.45 ± .05 mm (3.8760 ± 0.0020 inch) |
| Lower Hitch of the Engine End of the Frame | 98.45 ± .05 mm (3.8760 ± 0.0020 inch) |
98.45 ± .05 mm (3.8760 ± 0.0020 inch) |
| Lower Hitch of the Front Frame | 139.96 ± .04 mm (5.5102 ± 0.0016 inch) |
139.96 ± .04 mm (5.5102 ± 0.0016 inch) |
Locations of the Bores in the Frame for the Steering Cylinders for Feller Bunchers
 | |
| Illustration 3 | g00923485 |
| Location of the Bore for the Steering Cylinders | 533 | 543 |
| A | 953.9 mm (37.5550 inch) |
953.9 mm (37.5550 inch) |
| B | 163.24 mm (6.4268 inch) |
163.24 mm (6.4268 inch) |
| C | 294.5 mm (11.5945 inch) |
294.5 mm (11.5945 inch) |