HOSE AS 9U3472 - Caterpillar

Check Chain Tension
Note: To check the chain tension, one wheel must be secured so that the wheel will not rotate. No extra precautions should be taken when you check the chain that connects the drive axle and the center axle. The parking brake keeps the drive axle stationary. Wheel chocks should be used on the center wheel when you check the chain tension between the center axle and the free axle. There are two chains in each chain case.
Thoroughly clean the wheels and the chain cases.
Illustration 1 g00748667
Wrap a sling around the wheel. Pull the sling and rotate the wheel in the clockwise direction as far as possible.
Make a mark (CW) on the outside of the steel rim. Make a reference mark on the surface or ground directly below the mark on the tire.
Rotate the wheel as far as possible in the counterclockwise direction. Make a second mark (CCW) on the steel rim above the reference mark.
Measure the distance between the two marks. This is a linear measurement.
If the measurement is more than 190.50 mm (7.5 inch) adjust the chain tension.
Repeat Step 1 through Step 6 for the other side of the machine.
If the chain tension is correct, lift the machine and remove the wood blocks.Removing a Link
Table 1
Required Tools    
Tool     Part Number     Part Description     Qty    
(5)     5P-2706     Clamp     1    
Drain the oil from the chain case. Refer to Operation and Maintenance Manual, "Chain Case Oil Level - Change" for more information.
Remove the drive shaft from the final drive. Refer to Operation and Maintenance Manual, "Towing the Machine" for more information.
Illustration 2 g00748845
(1) Bolt (2) Access cover
Remove bolts (1) from access cover (2) and remove the access cover. The cover is located on the side of the machine and between the wheels.
Rotate the wheels until the master link is visible through the access hole.
Illustration 3 g00748846
(5) Tooling (3) Spring pin (4) Master pin
Remove spring pins (3) from the master link.
Remove master link (4) . Use tool (5 ) to remove pressure from the master link.
Perform all service to the chain on the outside of the chain case in order to prevent contamination.
Cover the openings of the chain case in order to block grinding debris.Note: The chain pins are peened. The ends of the pins must be ground in order to allow removal of the pins.
Remove the area that is peened. Grind the end of the pin. Grind both pins of a link.
Use a brass drift and a hammer to remove the pins and the link.
Remove the link bar.
Wipe the chain and wipe the chain case in order to remove all of the debris from grinding. Ensure that all metal is removed.
Install the new link. Install the pin that holds the link in place.
Place a heavy metal object behind the pin. Use a ball peen hammer and deform the other end of the pin by peening.Note: The end of the rivet must be peened enough to bear the load.