Start the machine, rotate the boom to the track side where the pin is broken, and support the track off the ground. 2. Turn around and walk, and turn the broken pin to the front of the guide wheel. 3. Find a long screwdriver and knock out the bolt from one end with a hammer. 4. Put down the boom and let the crawler land. 5. On the lower frame, there is a small rectangular iron cover fixed with four screws (see figure). Unscrew the screw, and there is a telescopic cylinder to adjust the tightness of the track. Take off the cover and you will see a grease nozzle check valve. Tighten the screw on the check valve with a wrench (do not loosen it completely, there is pressure). 6. Start the machine, press the guide wheel to a proper position directly behind the machine with a bucket (the purpose is to release the butter in the tensioning cylinder, so that the crawler can be loosened, so as to replace the new crawler pin), and aim at the pin hole of the disconnected crawler position. 7. Replace the new pin 8 and lock the butter check valve. 9. Inject butter into the tensioning cylinder with a grease gun, and tension the crawler to a proper tension. 10 finished ~ ~

* * * Note * * If the crawler falls off, find an experienced operator who can hang the crawler to operate. If the track is loose, there is no need to remove the one-way valve to put the butter. Just put the number on it without much effort. Just turn the broken pin to the guide wheel and knock it off, replace it with a new one, check the tightness and fill it up with oil. I really can't knock it out. Looking for oxygen welding and blowing ~