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PURGING AIR PROCEDURES
5. For pipe fittings, refer to the parts list for the high reach boom.
2. AIR PURGING OF BOOM CYLINDER LOCK VALVE
1. Air purging of pilot hose.
To prevent accidental operation of the boom cylinder, dis-
connect the pilot hose of the control valve at the tee joint
(DOWN side) and adapter (UP side) (position i on diagram -
close to swivel joint).
q Place a blank cap or blind plug on the removed hose connec-
tors, tee joints and adapters.
(1)
#03 (M18, P=1.5) elbow with O ring for pilot P
(2)
R=1/8" hex socket head plug for valve inner drain
(3)
#03 (M18, P=1.5) R=1/4" threaded elbow for pilot T
(4)
Plate can be mounted on either left or right side
q Remove plug 1, set boom control lever to DOWN and wait
until oil flows continuously (until bubbles cease).
WHEN SELECTING THE ABOVE METHOD, WATCH OUT FOR SPURTING OIL AND PREPARE A PROTEC-
TIVE COVER AND OIL PAN TO PREVENT THE AREA FROM BEING POLLUTED BY OIL.)
q Run the engine at half throttle speed.
q Set the boom control lever to DOWN (at full stroke) and keep it at this position for approximately 2 minutes.
Then, move the boom up and down several times.
2. Air purging of boom lock valve.
q Replace plug 1.
7-42
HIGH REACH DEMOLITION EQUIPMENT 27M
WARNING
CAUTION
(1)
(2)
(3)
(4)
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