Piston
Apply"Locktight#638".
Slide pipe
Pressure Oil
To Ta nk
Seletor valve ass ’y
Check valve 2
Rod
Check
valve
Bolt
Tele2
Check valve 1
Spool
Tele1
Tele2
Tele3
Pipe for cord reel
Counter-balance
valve
How oil flows when tele1 is extended
Pressure oil opens the check valve in the counter-balance valve to
enter the cylinder rod of tele1 and flows through the slide pipe to reach the
check valve 1 of selector valve ass ’y.
The tele2 has been fully retracted at the time and the bolt opens the
check valve 1 of selector valve ass ’y via spool which leads the pressure oil to
the extension side.
Simultaneously , oil in the retraction side of tele1 flows through the
dual cylinder in the rod to return to the tank.
This allows the tele1 to extend.
Since the check valve 2 of selector valve ass ’y is closed at the time,
pressure oil will not flows in the tele2.
Also, oil in the retraction side of tele2 will not flows in the tele1 as
the tele2 has been fully retracted so that the tele2 will not be actuated.
And the tele3 also will not be actuated according to the same
reasons as in the tele2.
After the set-screw is tightened
with Lock Tight #2701 applied hit
with a punch at 2 places on the
circumference and leave it as
it is for 1 hour .
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