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Specific Procedure For How To Fit Undercarriage Rubber Tracks
You got to start up with removal of existing track. Lift a side off the ground using jack. Procedure to loosen out mounted track is to pull back the idler after releasing track adjuster valve, fixed up in front side of machine.  This loosens out the existing track for taking out. For mounting the new one, first of all you should secure the track over sprocket in way that the spikes of sprocket come between the lugs of track. Now you need to glide the track to pass over front idler ensuring alignment of lugs with idler guide and the rollers. Now remaining work is checking and adjusting the tension. Adjustment of track tension to correct state is done following manufacturers recommendations depending upon type of machine, which is done by assessing slackness of track at the middle roller, for some the second roller. Adding grease to the track fitting loosens up the track and for tightening the grease needs to be removed using a specific adjustment instrument.
The track adjustment tool is set up on side of track frame and fixing ratchet wrench over it with nuts and bolts carefully ensuring no dropping of nuts and bolts since retrieving back is tedious. The ratchet wrench is usually kept detached for compaction purpose.  Ratchet wrench releases pressure from top idler mechanism.  This provides enough ease to put the mounting bolt to next hole that pulls the track to get tightened up. Now, having completed the tension adjustment, you have to remove the track tension adjustment instrument but before preparing to uninstall the instrument, make yourself doubly assured if the reset tension is all right. Next, you have to take out track-adjusting instrument from undercarriage of the machine and place it back in its original location.
After completing adjustments, you got to securely place back covers and take out lifting jacks to lower back the machine to the ground. Finally, remove the hookup supports unlocking the boom. Finally a test run and maintaining correct tension remains to be your finishing and subsequent tasks. Test running is done following prescribed instructions.  For on-ground testing drive with caution on rocky grounds or a testing area full of protruding sharp objects to avoid damage to the track; also try to avoid ramming into kerbs. Sharp projections on ground and on the kerbs may damage mounted new track rubber and the steel cords.