Pipe for cord reel
ロッド
１４－
(2) When Telescoping Cylinder1 retracts
To tank
Counter balance
Valve
Piston
Apply"LOCTITE#638”
Slide pipe
Check valve 2
Check valve 1
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.
counterbalance
valve
Tele1
Tele2
Tele3
Spool
Bolt
Tele2
Selector valve ass’y
Pressure
Oil
Pilot
Pressure
Spool
Check
valve
How oil flows when tele1 is retracted
Pressure oil ows through the dual cylinder of cylinder rod of tele1
to enter the retraction side of tele1.
At this stage, the bolt opens the check valve 1 of selector valve ass'y
via spool which leads the oil in the extension side to the counter-balance
valve by way of slide pipe.
Although the check valve in the counter-balance valve is closed at
this time, the spool is opened by pilot pressure from the retraction side
allowing the oil in the extension side to return to the tank.
This allows the tele1 to retract.
Although pressure is also applied to the retraction side of tele2 at
this stage, the tele2 will not be actuated because the check valve 1 of selector
valve ass'y for tele1 is closed and the passage to the extension side of tele2 is
shut o so that no oil is to be remained in the extension side of tele2.
And the tele3 also will not be actuated according to the same
reasons as in the tele2.
Courtesy of Machine.Market
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