Komatsu PC400LC-5 Operation & Maintenance Manual page 179

24. SERVICE PROCEDURE
If the track tension is not at the standard value, adjust it in the
following manner.
Adjustment
A
WARNING
Grease inside the adjusting mechanism is under high pressure.
Grease coming from plug @ under pressure can penetrate the
body causing injury or death. For this reason, do not loosen plug
@ more than one turn. Do not loosen any part other than plug
0. Furthermore, do not bring your face in front of the plug 0.
If the track tension is not relieved by this procedure, please
contact your Komatsu distributor.
When increasing tension
Prepare a grease gun.
Pump in grease through grease fitting @ with a grease gun.
To check that the correct tension has been achieved, move the
machine backwards and forwards.
Check the track tension again, and if the tension is not correct,
adjust it again.
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.
AE098540
3-35