BELLOW AS 1534045 - Caterpillar

Check Chain Wear
Remove the drive chain from the motor grader.Reference: Refer to Disassembly and Assembly, "Drive Chain - Remove".
Inspect the chains. Replace the chains for the following conditions:
cracks
broken components
deformationNote: If the chain does not pass the inspection you must replace the entire chain. Always replace both chains in a tandem housing at the same time. Do not splice a new section of chain on a worn section of chain. Worn chains will not engage the sprockets properly and increased damage to the sprocket may occur.
Personal injury or death can result from improper lifting or blocking.When a hoist or jack is used to lift any part or component, stand clear of the area. Be sure the hoist or jack has the correct capacity to lift a component. Install blocks or stands before performance of any work under a heavy component.Approximate weights of the components are shown. Clean all surfaces where parts are to be installed.
Suspend the chain from the hoist.
Hang a suitable scale from the chain. The scale must be able to measure the chain tension that is listed in Table 1.
Fix the free end of the scale to the motor grader. Reference: Refer to the Operation and Maintenance Manual, "Lifting and Tying Down the Machine" for the proper lifting locations for a motor grader.
Apply the proper amount of chain tension. Refer to Table 1. Ensure that all of the slack is out of the chain before a measurement is taken.
Measure the number of chain links that are listed in Table 1.
The elongation of the chain must be less than the specification in Table 1. Note: If the elongation of the chain is not within specifications, you must replace the chain. Replace the entire chain. Always replace both chains in a tandem housing at the same time. Do not splice a new section of chain on a worn section of chain. Worn chains will not engage the sprockets properly and increased damage to the sprocket may occur.
You may reuse the old chain if the chain passed the checks for chain wear. Otherwise install a new chain.Reference: Refer to Disassembly and Assembly, "Drive Chain - Install".Refer to the following table for the limits for chain wear.
Table 1
Limits for Wear of the Chain    
Model    Chain Pitch    Number of Chain Links    New Measurement     Measurement of Maximum Wear    Chain Tension (1)    
120H
135H    
44.5 mm (1.75 inch)     14    
622.3 mm (24.50 inch)    
641.1 mm (25.24 inch)    
173 kg (381 lb)    
12H, 140H, 143H, 160H, 163H    
50.8 mm (2.00 inch)     12    
609.6 mm (24.00 inch)    
628.7 mm (24.72 inch)    
277 kg (610 lb)    
14H    
57.2 mm (2.25 inch)     11    
628.7 mm (24.75 inch)    
647.7 mm (25.50 inch)    
286 kg (630 lb)    
16H    
63.5 mm (2.50 inch)     10    
635 mm (25 inch)    
654.1 mm (25.75 inch)    
354 kg (780 lb)    
24H (2)    
76.2