GUARD GP-DRIVE SHAFT 2179672 - Caterpillar

Before service work is begun, park the machine on a hard, level surface. Block the wheels of the machine so unexpected movement will not occur. Unexpected movement of the machine can cause personal injury or death.
1. Move the ejector to the forward position.2. Remove the 2T-1988 Cover Assembly from the rear of the push frame.3. Move the ejector back to the desired extreme rearward position.4. Measure the amount of rod travel remaining at the ejector cylinder. This will determine the thickness of the spacer to be fabricated in Step 7. The measurement of rod travel should be within the thickness range specified in Step 7.5. Move the ejector to the forward position.
Illustration 1. Location of mounting brackets.6. Cut the cylinder mounting brackets (1) free of the frame. Refer to Illustration 1. Properly support the cylinder before cutting the cylinder mounting brackets free of the frame.
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 kill.
Read and understand the manufacturer's instructions and your employer's safety practices. Keep your head out of the fumes. Use ventilation, exhaust at the arc, or both, to keep fumes and gases from your breathing zone and general area. Wear correct eye, ear, and body protection. Do not touch live electrical parts.
See American National Standard Z49.1 "Safety in Welding and Cutting" published by the American Welding Society, 2501 N.W. 7th Street, Miami, Florida 33125: OSHA Safety and Health Standards, 29 CRF 1910, available from U.S. Dept. of Labor, Washington, D.C. 20408.
Welding operator personal protection should be provided to assure that total weld fume in the operators breathing zone does not exceed OSHA limits.All repair welding operators must be qualified for groove and fillet welding, as outlined the current ANSI/AWS D14.3, or Caterpillar Manufacturing Practices MC1000-105. The qualification will be for the SMAW (Shielded Metal Arc Welding) process in the vertical welding positions. The welding operator must also have used this welding process during the last six months or be re-certified for this process before welding. Documentation must be maintained of the weld operators qualifications. The alternate process for this repair could be FCAW (Flux Cored Arc Welding).
The area to be welded and the surrounding area must be at a minimum temperature of 16° C (60° F) before and during welding.
Since weld distortion is a possibility, minimizing the heat into the casting is important.The SMAW process shall be used with E7018 (ANSI/AWS A5.5) welding electrode. The weld deposited by these electrodes will have the following minimum mechanical properties:500 MPa (72 KSI) Tensile Strength 420 MPa (60 KSI) Yield Strength22% elongation in 50 mm (2 in)27 J (20 ft lb) Notch Toughness at -29° C (-20° F)
These are low hydrogen electrodes and must be stored in an electrode oven at 121° C (250° F) when not in use. If the electrodes get damp, scrap or recondition them to the manufacturer's specifications.
The following chart relates