Cascade Viewmast II 30C Triple Installation Instructions Manual page 7

The sequenctng of the horst cylrnder IS controlled by an
Internal sequence valve. If the plungers do not sequence
properly.
then adjust the sequence valve as follows-
CAUTION
Before proceeding, make sure the cylinder is fully lowered.
i
a. Remove the bleed fitting at the top of the slave plunger.
b.
Insert a 3/l 6-inch, long-handle, hex socket wrench (66261 1)
into the bleed hole and engage the adjusting nut.
C. Turn the adjusting nut counterclockwtse until it bottoms.
The nut IS crimped slightly to prevent free-turning so it
may be a little stiff. Don't force the nut after it bottoms.
See Figure 8.
CROSSHEAD ASSEMBLY
HEX SOCKET WRENCH
Figure 8. Turning the Adjuettng Nut CounterclockwIa
d.
Turn the adjusting nut clockwtse two full turns to provrde
an rnrtral adjustment. Remove the wrench and Install the
bleed flttlng.
e. Operate the cyhnder wrth about a half-capactty load to
check for proper sequencrng. If the slave plunger extends
fast and the master plunger does not extend at all, the
sequence valve is not opening. Turn the adjusting nut
clockwise one turn only. Reinstall the bleed fitting and
retest, Continue this process until the cylinder sequences
properly. See Figure 7.
f.
As soon as the cyltnder sequences properly, turn the adjust-
ing nut clockwise one more turn only to assure a posittve
adjustment.
g. Extend and retract the cylinder completely. If it does not
operate smoothly or if it appears to be "spongy", bleed air
from the cylinder as specified in paragraph 1, "Bleeding
the Cylinder".
3. Crosshead Adjustment
The sum total clearance between the tire shoulders and the
Mast I-Beam must be ,060" as shown in Figure 9 or 10. If one
tire is touching the I-Beam (which is acceptable) the other tire
should have .060" clearance.
Adjust the Crosshead to attain the clearance as follows.
a
Triple Lift: Loosen the setscrew. See Figure 9. Quad Lift:
Loosen the hex locking nut. See Figure 10.
b.
Triple Lift: Use an open end wrench to turn the hex nut to
attain the clearance shown .in Figure 9. Quad Lift: Use a
hex socket wrench to turn the shaft to attain the clearance
shown in Figure 10.
C. Triple Lift: Tighten the setscrew. Quad Lift: Tighten the
hex locking nut.
CAUTION
Insufficient tightening can result in the tire loosening and
the crosshead jamming between the I-Beams.
AST I-BEAM FLANGE
MAST I-BEAM FLANGE
\
TIRE
The tire should never touch the guide at these points.
Figure 9. Triple Lift Crosshead Adjustment
MAST I-BEAM FLANGE
/
I
.060' '
MAST I-BEAM FLANGE,
.I I
The tire should never tou;h-tha z Tha
CROSSHEAD
NUTS
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nts.
I I rcs9 IGUIDE
'
Figure 10. Qued Lift Crossheed Adjustment
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