Fluid Management 53PD Blendorama User Manual - Manual (Page 36)

34 | Blendorama Dispenser
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1
Replacement of the inner piston
a. Undo the knurled nut holding the cylinder end
cap and remove the plunger assembly from the
cylinder. Remove both gauges from the plunger
assembly, withdraw the inner plunger assembly
from the hollow outer plunger shaft and clean all
colorant from both plunger assemblies.
b. Using two pairs of pliers, grip the inner end of
the piston with one and the piston shaft with the
other. Unscrew the piston (using a little heat if
difficult) and discard.
c. Apply Loctite 262 to the internal thread of
the piston shaft, then screw the new piston
assembly in fully. Slide sleeve up onto the shaft,
tighten the piston with pliers and replace the
sleeve over the piston.
2
Replacement of the outer piston
a. Remove nut holding existing piston seal, then
remove seal. Fit new piston seal with retainer
to the shaft. Replace front nut using a drop
of Loctite on thread. Tighten nut only until the
piston seal can no longer be rotated by hand.
b. Lightly oil the top inside edge of cylinder
and position the tool containing the plunger
assembly on its rim. Gently push the outer piston
into the cylinder, then remove the screw from the
tool and remove it from the out piston shaft
c. Refit the end cap onto the top of the cylinder and
tighten the knurled nut. Remove sleeve from the
inner piston and discard. Lightly oil top inside
edge of hollow outer piston shaft, gently ease
piston inside. Refit all gauges. Ensure black pin
on RHS when tightened.
General Maintenance
Piston seal replacement - Model 53 PD