Hydraulic Diaphragm Liquid End (Tzha) - ProMinent Makro TZ Operating Instructions Manual

Repair
Page 34
11.2

Hydraulic diaphragm liquid end (TZHa)

Set stroke adjustment knob to 0 %
Unfasten union nuts and/or flange on valves and detach lines
Empty liquid end and rinse is necessary
Place an oil trough underneath the liquid end and hydraulic end
Drain out the hydraulic oil from the hydraulic end via the acrylic glass stopper (3) (see Fig.)
Lightly screw in the acrylic glass stopper (3)
Unscrew the orange cover from the diaphragm rupture warning system (see Fig.)
Untighten the 6 nuts (1) on the liquid end (oil trough?)
Carefully remove the liquid end from the stud bolts
NOTICE
Contaminants must never be allowed to enter the hydraulic end.
Remove the diaphragm (3) (oil trough?)
Clean the sealing surfaces on the liquid end and the hydraulic end (using a suitable cleaning
agent if necessary)
Place the new diaphragm (3) with the light grey coating facing outwards onto the hydraulic
end
Tighten the orange cover for the diaphragm rupture warning system until the diaphragm is
loosely held in position
push the liquid end over the stud bolts onto the hydraulic end (is the cut-out on the side of
the liquid end located on the side of the diaphragm rupture warning system?)
Check that the diaphragm contact is resting easily in the diaphragm rupture warning system
housing
Tighten the 6 nuts (1) on the liquid end to 30 Nm (torque wrench! )
Screw the orange cover onto the diaphragm rupture warning system
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