- Excavator:
- M313D (S/N: K3D1-UP)
- Thumb:
- THUMB (S/N: THC1-UP)
Introduction
Do not perform any procedure that is outlined in this publication. Do not order any parts until you understand the information that is contained in this document.
ReferenceRefer to your host machine Operation and Maintenance Manual prior to performing this installation.
ReferenceService Guide, SEBD0512, "Caterpillar Service Welding Guide"
ReferenceSpecial Instruction, REHS1841, "General Welding Procedures"
Safety Section
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Do not operate or work on this machine unless you have read and understand the instructions and warnings in the Operation and Maintenance Manuals. Failure to follow the instructions or heed the warnings could result in injury or death. Contact your Cat dealer for replacement manuals. Proper care is your responsibility. |
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Personal injury or death can result from sudden work tool movement. Sudden movement of the work tool can cause injury to persons near the work tool. To prevent injury or death, make sure that the area around the work tool is clear of personnel and obstructions before operating the work tool. |
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Personal injury can result from hydraulic oil pressure and hot oil. Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system. Make sure all of the work tools have been lowered to the ground, and the oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand. |
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Personal injury or death can result from improperly checking for a leak. Always use a board or cardboard when checking for a leak. Escaping air or fluid under pressure, even a pin-hole size leak, can penetrate body tissue causing serious injury, and possible death. If fluid is injected into your skin, it must be treated immediately by a doctor familiar with this type of injury. |
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| Illustration 1 | g00104545 |
Attach a "Do Not Operate" warning tag or a similar warning tag to the start switch or to the controls before you service the equipment. These warning tags (Special Instruction, SEHS7332) are available from your Cat dealer.
Welding Requirements
Welding quality is critical to the success of the installation procedures. Welds must be smooth and continuous. Do not undercut the welds. No overlap is allowed. Grind the ends of the welds to a smooth radius.
Prepare the metal for welding according to the next section. Refer to the illustrations in this special instruction for welding symbols and specifications.
Be sure that all electrodes are dried. The electrodes can be dried by heating the electrodes to 300°C (572°F). The electrodes must be dried for at least 30 minutes.
Do not weld in windy conditions. Do not weld when temperatures are below 16°C (60°F).
Penetration characteristics may vary greatly depending on the following conditions:
- Electrode diameter
- Shielding gas
- Welding current
- Plate thickness
The following items also affect the welds:
- Geometry of welded joints
- Surface conditions
- Composition of the base metal and of the electrode
For more welding information, consult the General Welding Procedures, REHS1841.
Preparing the Metal for Welding
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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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Before carrying out arc welding on the machine or on any equipment attached to the machine, disconnect all power and ground leads from the batteries in order to avoid possible damage to electronic components. |
All grease, paint, and foreign objects must be removed before welding. Any of these materials will discharge gas which will cause porosity in the weld deposit. Water and rust will cause hydrogen embrittlement. Hydrogen embrittlement causes cracks in the weld deposit.
Remove foreign objects with a wire brush, a buffer, or a grinder. Shot blasting the appropriate areas will also remove foreign material.
Note: After welding, allow all areas to cool to room temperature. After the areas have cooled, paint the area with primer. After the primer has dried, coat the area with Cat 4C-4200 Yellow Paint .
Required Parts
| 463-9598 Bracket Mounting Gp - 00 | |||
|---|---|---|---|
| Item | Qty | Part Number | Description |
| (1) | 1 | 370-8614 | Bracket As |
| (2) | 1 | 370-8617 | Stop Plate |
| (3) | 1 | 153-8842 | Plate |
| (4) | 1 | 7Y-2522 | Plate |
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| Illustration 2 | g03788062 |
463-9598 Bracket Mounting Gp | |
Installation Procedure
- Prepare the areas to be welded by removing all paint, oil, and debris.
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| Illustration 3 | g03788063 |
(NOTE A) Center brackets on the stick (NOTE B) Run a continuous extension of the root pass and fillet weld to a length of 30 mm (1.18 inch) tapering to a height of 3 mm (0.12 inch) in that distance. Grind the surfaces to flush at each end. (1) 370-8614 Bracket As (2) 370-8617 Stop Plate (3) 153-8842 Plate (4) 7Y-2522 Plate | |
- Locate and weld the components onto the stick as shown.
- Apply a rust prevention coat primer.
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| Illustration 4 | g03788064 |
(1) 370-8614 Bracket As (2) 370-8617 Stop Plate (3) 153-8842 Plate (4) 7Y-2522 Plate | |
- Apply a finish coat of paint.