Components of the Undercarriage
Check crawler shoe adjustment.
- With the shovel on a level surface propel the machine so that the slack in the crawler shoe belt is at the top of the Crawler Frame.
- Set brakes and lock out the shovel .
- Clean material from the track adjustment area on the front idler.
- Remove shim retainer bars.
- Install jacks to remove slack from in the crawler shoe belt.
- Remove shims from in front of idler.
- Pressure up the jacks as the idler moves forward
- install shim behind the idler blocks. (Use equal number shims on each side of crawler frame)
- Once the desired track tension is achieved and shims and shim retainers are in place. Remove jacks.
- Repeat on the on the other crawler shoe belt.
Re-torque Crawler Frames
- Remove Supernut covers.
- UT the tensioning rods prior to retorquing crawler frames.
- Re torque Supernuts to 246ft lbs. using the circular torque pattern.
- Repeat step 3 until all jack screws stabilize with less than 20 degrees of rotation.
- Once torqueing is complete reinstall Supernut covers
Inspect Lubrication
- Cycle the lower lube system. Check for leaks, Check for broken lube lines, and check injectors for functionality.
- Look for grease (Load Rollers, Rear Idler, Front Idler, and Final drive areas).
