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28.7 FIRST ATTACHMENT WITH CLAM-SHELL OPTION
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Machines fitted with a single attachment circuit can also be supplied with clam-shell grab piping or can have
such piping fitted at a later time.
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The clam-shell open/close function uses the bucket cylinder circuit with the bucket cylinder disable by the two
arm mounted stop valves (Left hand side exemple shown below).
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The first attachment circuit (right hand cab pedal) can be used to rotate grabs with a rotary function with the
revo-frame mounted 3-way valve set to 2-way flow (see section 11.6)
Fine control of rotation can be achieved by adjusting the maximum output of the first attachment using the
righthand panel mounted 10 position switch (see section 11.5).
5-12-1
5-13
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