19 of 29New Hydraulic Systems Systems Operation
Tilt Spool
IN
“
A
”
to tank
“
B
”
blocked
By-pass open
CENTER
“
A
”
and
“
B
”
blocked
By-pass open
OUT Pressure to
“
A
”
“
B
”
blocked
By-pass blocked
Tilt spool - a counterbalance spool normally used to
control the tilt function of a lift truck.
The counterbalance feature prevents the forks from
tilting forward faster than the pump can supply oil,
preventing tilt.
IDCS012B
Auxiliary Spool
IN Pressure to
“
B
”
“
A
”
to tank
By-pass blocked
CENTER
“
A
”
and
“
B
”
blocked
By-pass open
OUT Pressure to
“
A
”
“
B
”
to tank
By-pass blocked
Auxiliary spool - directs flow to either end of a double
acting cylinder. Flow from the end that is not under
pressure is returned to tank via internal coring of the
valve section.
IDCS010B
IDCS011B
IDCS013B
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