- Track-Type Tractor:
- D3K (S/N: JTD1-UP; FFF1-UP; LLL1-UP)
- D4K (S/N: MMM1-UP; RRR1-UP)
- D5K (S/N: JLF1-UP; WWW1-UP; YYY1-UP)
- D4K (S/N: MMM1-UP; RRR1-UP)
Introduction
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| Illustration 1 | g02334598 |
Blade Rack (1) 369-8754 Rack | |
This Special Instruction is for the installation of the 369-8754 Blade Rack As . Contact your local Cat dealer if you require more information regarding the installation of the blade rake.
Do not perform any procedure or 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"
ReferenceTorque Specifications, SENR3130, "Torque Specifications for All Caterpillar Products"
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.
All electrodes must be dried completely. 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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| NOTICE |
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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.
Remove any oil or grease with a Caterpillar approved solvent.
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 Caterpillar 4C-4200 Yellow Paint .
Safety Section
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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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Required Parts
| Parts List for 369-8754 Blade Rack | ||
| Item | Qty | Part Number |
| (1) | 1 | 369-8754 Rack As. |
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| Illustration 2 | g02336218 |
Installation Procedure
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| Illustration 3 | g00104545 |
Prevent the machine from movement. Park the machine on a level surface. Block the tires.
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 Caterpillar dealer.
This procedure will require the use of a suitable lifting device or devices to position the parts safely.
- Using a grinder or other suitable method, remove the paint from the upper back side of the blade.
- Using a suitable lifting device, lift rack assembly (1) into position on blade group according to illustration 4. Rack assembly (1) weighs approximately 93.5 kg (206 lb).
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| Illustration 4 | g02336226 |
Blade Rack location (1) 369-8754 Rack (A) 178mm (7in.) (B) 453.3mm +-3mm (17.84in.+-0.12in.) (W1) 6mm (0.24in.) Fillet Weld, X to Y (eight places) with 1.5mm (0.06in.) penetration. | |
- When rack (1) is properly positioned, tack weld in place using E7018 welding electrode or equivalent wire. Check for proper position.
- Using E7018 electrode or equivalent wire, weld rack (1) in place with a 6mm (0.24in.) fillet weld, maintaining 1.5mm (0.06in.) root pass penetration.
- Weld both sides of all eight uprights of rack (1) from "X" to "Y".
- Allow the welded area to cool.
- Prepare the welded area for paint.
- Apply the rust prevention coat and the finish coat to the work area that has been completed.