24. SERVICE PROCEDURE If the track tension is not the standard value, adjust in the following manner. Adjustment When increasing tension Prepare a grease gun. 1. Pump in grease through grease fitting b with a grease gun. 2. To check that the correct tension has been achieved, move the machine backwards and forwards. 3. Check the track tension again, and if the tension is not correct, adjust it again. 4. Continue to pump in grease until S becomes 0 mm. If the tension is still loose, the pin and bushing are excessively worn. so they must be either turned or replaced. Please contact your Komatsu distributor When loosening tension. 1. Loosen plug y gradually to release the grease. 2.
Turn plug y a maximum of one turn. 3. If the grease does not come out smoothly, move the machine back- wards and forwards a short distance. 4. Tighten plug y 5. To check that the correct tension has been achieved, move the machine backwards and forwards. 6. Check the track tension again., and if the tension is not correct, adjust it again. PC450-ENG 3-34 WARNING Grease inside the adjusting mechanism is under high pressure. Grease coming from plug a under pressure can penetrate the body causing injury or death. For this reason, do not loosen any part other than the plug a more than one turn. Do not bring your face in front of the plug a.
If the track tension is not relieved by this procedure, please contact your Komatsu distributor. WARNING It is extremely dangerous to release the grease by any method except the procedure given below. If the track tension is not relieved by this procedure, please contact your komatsu distributor.