GEAR ASSEM. (34T.) 7M1842 - Caterpillar

Note: 138-0007 Retainer CAN NOT be reused if the retainer measures less than 97 mm (3.82 inch).50 Series of the Mechanically Attached Wear Plate System for the 994 Wheel Loaders, for the 5230 Excavators, and for Other Similarly Sized Machines
Note: The minimum radius for the 50 Series of the Mechanically Attached Wear Plate System is 1200 mm (47.2 inch).
Table 7
50 Series of the Mechanically Attached Wear Plate System    
Part Number     Description     Dimension    
138-0050     Base Plate    
29 mm (1.14 inch) Thick    
138-0052     Wear Plate    
300 X 250 X 75 mm (11.8 X 9.8 X 2.9 inch)    
138-0053     Wear Plate (Heavy Duty)    
300 X 250 X 100 mm (11.8 X 9.8 X 3.9 inch)    
138-0007     Retainer        Note: 138-0007 Retainer CAN NOT be reused if the retainer measures less than 97 mm (3.82 inch).Installation Instructions
Locate the area that will be protected. Clean the area free of dirt, of paint, and of debris. Be sure to leave a minimum of 50.8 mm (2 inch) clearance from adjacent objects for removal and for installation of the wear plate.
Illustration 1 g00830781
Typical base plate for the Mechanically Attached Wear Plate System
Illustration 2 g00830782
Bottom view of the base plate for the 50 seriesNote the J-Groove at locations "B" and "C".
Position the base plate in the desired location. Weld the base plate in position at the locations "A" and "B". Location "C" is used only for the base plate of the 50 Series. Make one pass at a time in each location in order to avoid excess heat buildup. The base plate will require several passes at each location in order to ensure that the proper strength is achieved. Use Table 8 in order to determine the sizes of the fillet welds and the J-groove welds and the number of passes for the base plate of each series. Note: The gaps between the base material and the base plate should be minimized. If necessary, tack welds can be used.Note: Do not weld along the sides of the base plate. The wear plate will slide over the base plate and any welds in these locations may interfere with the installation of the wear plate.
Table 8
The Sizes of Welds and The Number of Required Passes    
Series of Base Plate     Fillet And/Or J-Groove Weld     Passes     Location of Welds    
20 Series    
15 mm (0.6 inch)     3     A & B    
30 Series    
15 mm (0.6 inch)     3     A & B    
40 Series    
18 mm (0.7 inch)     6     A & B    
50 Series    
20 mm (0.8 inch)     8     A, B, & C    
Illustration 3 g00830783
Installation of the wear plate on the base plate
Position the wear plate over the base plate. Slide the wear plate onto the base plate.
Illustration 4 g00830784
Bottom view of the wear plate that