Switching Off And Storage; Precautions Against Freezing; Maintenance; Routine Maintenance - UDOR ZETA 70 Manuel D'utilisation Et Entretien

8.4

SWITCHING OFF AND STORAGE

After use or if the Pump is to be put away in storage, wash it internally. You can do this by running
the Pump for several minutes with clean water, then disconnect the supply line and leave the Pump
to run for approximately 15 seconds so that all the water inside the pump is drained.
A few minutes devoted to the internal washing of the pump brings considerable benefits in terms of
the pump's lifetime.
Never leave liquid inside the pump. Damage to the diaphragms or to other components is often
caused by liquid that is left inside the pump for a long time.
Do not wash the Pump externally: water could get into the Pump crankcase, for example
through the seal rings of the crankshaft.
Do not throw the liquid used to wash the Pump outdoors but observe current standards.
8.5

PRECAUTIONS AGAINST FREEZING

If shutdown during winter or in the case of places and seasons subject to frost, once the Pump has
finished working, run it for the time required to Pump an emulsion of 50% of clean water and 50% of
antifreeze fluid through it in order to prevent freezing and damage to the Pump.
The Pump must not be used to Pump antifreeze fluid that is not mixed with water.
In the presence of ice or very cold temperatures at the workplace, the Pump must never
be started, otherwise the Pump could be seriously damaged. To start the system, the whole
circuit must be completely defrosted.
9.

MAINTENANCE

9.1

ROUTINE MAINTENANCE

If the Pump is used for light-duty purposes, the following routine maintenance jobs are advised:
- After the first 50 hours: Oil change (see section 9.2 - Lubrication)
- Every 500 hours: Oil change - Replace the diaphragms (see instructions below)
- Every 1000 hours: Replace the valves
For heavy-duty purposes, carry out the maintenance jobs more often.
Install this assembly to the piston (Q). Use Loctite 243 thread locker o equivalent on the diaphragm
bolt (L). Then torque to the recommended specifications (see page 19). Now rotate crankshaft (N) to
bring the piston (Q) and diaphragm (O) to the bottom of its stroke. Then seat the outside edge of
- DIAPHRAGM REPLACEMENT INSTRUCTIONS -
1. DRAIN CRANKCASE OIL: Drain Pump crankcase by
removing the oil drain plug (T) located at the bottom of the
Pump, also remove the oil fill cap (F) or plug (R).
2. EXTERNAL MANIFOLD REMOVAL: If your Pump has
external manifolds ( I ), these must be removed prior to
heads (B) removal.
3. HEAD REMOVAL: Do repairs one head (B) at a time.
Remove the head bolts (A), then remove the Pump head
(B) which may require some "light" prying.
4. DIAPHRAGM REMOVAL: Turn crankshaft (N) to bring
piston (Q) up to the top of its stroke, remove the
diaphragm bolt (L) and washer (M), then remove the
diaphragm (O). If necessary, take off one sleeve (P) and
wash well the internal components using diesel fuel. The
sleeve (P) must be re-mounted in the same position as
before.
5. INSTALLING NEW DIAPHRAGMS: Clean well the
threaded hole of the piston (Q). Install the diaphragm bolt
(L) and washer (M) into the new diaphragm (O).
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