Komatsu PC350LC-8, Operation & Maintenance Manual

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INSTALLATION AND REMOVAL
HIGH REACH DEMOLITION MANUAL
7-42
CAUTION
Take care to ensure all equipment is kept clean.
6. Operate the arm cylinder and boom raise so that the bore in
the arm cylinder top matches the bore in the arm end. Check
that the bores and pins are in good condition, cleaned and
freshly greased before refitting.
7. Insert the arm cylinder pin (from left to right), to make the con-
nection between the arm cylinder and the arm. Apply shims
to ensure that the dig boom and the arm are a correct fit (a
maximum of 0.5 mm tolerance is allowed). Shims should be
fitted to the right hand end of the pin.
8. Lock pin in place with plate (left side of work equipment).
CAUTION
Before reconnecting each hose check that there are no for-
eign particles in the hydraulic lines and that all connections
are clean.
9. Remove plugs from the hydraulic lines and reconnect.
WARNING
Take care to reconnect the hydraulic lines in the correct
order. Improper operation of the machine will occur if hoses
are connected incorrectly.
10. Reconnect the grease lines.
11. Purge the hydraulic circuits of air by following the steps in
PURGING AIR PROCEDURES (7-42)
PURGING AIR PROCEDURES 7
PURGING PROCEDURE TO REMOVE AIR FROM HYDRAULIC CYLINDER LINES.
NOTICE
Follow this procedure whenever hydraulic circuits have been
disconnected and reconnected.
1. Run the engine at low idle speed to extend and retract the cylinder 4 to 5 times. For both extension and
retraction, stop the cylinder approximately 100 mm before the end of the stroke.
2. In addition extend and retract the cylinder to the stroke ends 3 to 4 times.
3. Again extend and retract the cylinder 4 to 5 times to the stroke ends to completely purge air from the hydraulic
circuit.
4. On completing these operations, run the engine at normal speed.