BAR 5448016 - Caterpillar

Preparing the Metal for Welding
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.
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.Required Part for Installation
Table 2
Common Parts for All Grapples    
Part Number    Description    Qty    
320-6359     Keeper     2    
7X-2553     Bolt     1    
251-1414     Washer     1    
Table 3
Model Number of the Grapple and Part Number of the Pin Assembly    
Model    Part Number    Description    Qty    
G112B     325-8331     Pin As     1    
G115B     325-8331     Pin As     1    
G120B     325-8331     Pin As     1    
G125B     320-7417     Pin As     1    
G130B     320-7417     Pin As     1    
G145B     320-6391     Pin As     1    
G165B     320-6391     Pin As     1    
G185B     320-6391     Pin As     1    Repair Procedure
Illustration 1 g01626674
Typical drawing of a Grapple and related accessories (1) Mounting bracket assembly (2) Pin (3) Flag Retainer and bolt (hardware)
Illustration 2 g01626722
Mounting bracket assembly
Drill or machine pin retention holes (4) in mounting bracket (5) to 32 mm (1.26 inch).
Illustration 3 g01630778
View of mounting bracket assembly (Section A-A) (B) 6 mm (0.23 inch) fillet weld (2 Places). (C) Boss must protrude 12.5 + 2 - 0.5 mm (0.4921 + 0.078 - 0.02 inch) from the face of the mounting bracket.
Insert each boss (6) into each hole that has been enlarged.
Weld each boss (6) according to weld specifications.
Replace existing pin with the new pin and secure the pin with supplied hardware.