１４－３
Slide pipe
To tank
Pressure Oil
(3) When Telescoping Cylinder2 extends
Rod
Check
valve
Counterbalance
valve
Bolt
Tele2
Check valve 2
Check valve 2
Selector valve ass’y
Selector
valve ass’y
Piston
Piston
Bolt
Tele3
Spool
Check valve 1
Check valve 1
Slide pipe
After the set-screw is tightened with LOCTITE #2701
applied,hit with a punch at 2 places on the
circumference and leave it as it is for 1 hour.
Apply "LOCTITE #638".
Rod
Tele3
Tele2
Tele1
Pipe for cord reel
How oil flows when tele2 is extended
Pressure oil opens the check valve in the counter-balance valve to
enter the cylinder rod of tele1 and ows through the slide pipe to
reach thecheck valve 2 of selector valve ass'y
Since the slide pipe of tele1 is pulled by piston immediately before the
tele1 is fully extended which in turn opens the check valve 2 of selector
valve ass'y to lead the pressure oil to the extension side of tele2.
Simultaneously,oil in the retraction side of tele2 ows through the
dual cylinder in the cylinder rod of tele2 and through the dual cylinder in
This allows the tele2 to extend.
Since the check valve 1 of selector valve ass'y y of tele1 is closed at this
stage, the passage on extension side for tele1 is shut o.
The tele1 will not be actuated because no oil is remained in the
retraction side of tele1 as the tele1 is fully extended.
In addition, the tele3 will not be actuated because the check valve 2
of selector valve ass'y for tele2 is closed which in turn shuts o the passage
to extension side of tele3.
Courtesy of Machine.Market
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