jcb JS300 Service Manual page 863

Tracked excavators - tier 4i isuzu engine

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Install the pivot pin and retaining bolt and nuts.

Metal Splinters

You can be injured by flying metal splinters when

driving metal pins in or out. Use a soft faced hammer

or copper pin to remove and fit metal pins. Always

wear safety glasses.

Note: When checking or refitting JS machine pivot pins,

the retaining nuts and bolts should not be fastened up tight

to the pivot boss but must have approximately 3mm of play

so that the pin is free from tension.

Once the installation is complete, start the engine and

raise the boom fully. Under no load conditions, expel

any trapped air by operating the ram to full stroke in

both directions several times. Check for oil leaks.

Section E - Hydraulics

Hydraulic Rams

Removal and Replacement

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