Zenit MIXER Serie Manuel D'installation Et D'utilisation page 34

Safety, Installation and Operations Manual – Translation of original instructions
Once every 2 years or 9000
hours, whichever comes
first
Once every 4 years or 25000
hours, whichever comes
first.
Always replace rubber parts (O-rings, gaskets) of disassembled components during inspection
7.4 Cleaning
Remove any debris attached to the mixer's surface, and wash the mixer with tap water. Pay particular attention to the propeller area, and completely
remove any debris from the propeller.
If the mixer will not operated for a long period of time, pull the mixer, wash the mixer, allow it to dry, and store indoors. For reinstallation, be sure to per-
form a trial operation before putting the mixer into operation. If the mixer remains immersed in water, operate it on a regular basis (i.e. once a week).
EN
7.5 Fasteners inspection
Verify that there is no damage, and that the bolts, nuts and screws are properly tightened. Tighten screws with correct tightening torques.
When tigthening, renew the threadlocker if necessary.
For replacement purpose, the fasteners must be Class A2-70, A2-80, A4-70 or A4-80 according to ISO 3506-1.
Tightening torques (Nm)
M4 M5 M6
2.7 5.4 9.0
7.6 Electric cable inspection
Cables and their terminations are particularly prone to damage. They shall be inspected at regular intervals and whenever
is possible. Check that the electric cable is intact with no signs of pulling, cuts or other signs of misuse.
A faulty cable may enable liquids to enter the unit and may cause electrical leakage, short circuit, electrical shock or fire.
Check that the cable gland is intact. Damaged or defective parts shall be replaced immediately.
7.7 Bearings inspection
All bearing are rolling element type grease lubricated for life. Check the shaft for noisy or heavy operation (turn the shaft by hand) and in case,
replace defective ball bearings.
Defective bearings may reduce the -Ex safety.
7.8 Oil inspection
Oil change and mechanical seals (and gearbox for ZMR/ZMXR models) inspection is necessary if the leakage probe detects an
ingress of water into the seal chamber.
Possible excess pressure in the oil chamber: take care when unscrewing the oil plug. Unscrew the plug slowly, covering it with
a rag of suitable size.
caution
The drained oil must be disposed of in accordance with local regulations. Consign it to a specialist disposal centre.
7.8.1 Changing procedure
Place the mixer in a horizontal position on supports, and place a vessel underneath to collect oil.
Mechanical seals oil
1. Remove the oil plug (pos. A);
2. Drain oil into a vessel and leave it there for approx. 15 minutes to check if it contains water. If the oil contains water, a likely cause is defective
mechanical seal, which requires that mixer be disassembled and repaired;
3. Fill mechanical seal chamber with new oil (for quantity see the charts below);
4. Clean and refit the oil plug (pos. A). Use Loctite 243 threadlocker.
caution
Oil type: TOTAL Bio Hydraulic TMP FR46 or equivalent with ISO Viscosity Grade (Kinematic viscosity at 40°C) 40-90 cSt,
Flash point ≥ 240°C.
Gear box oil
1. Remove the oil plug (pos. B).
2. Drain oil into a vessel and leave it there for approx. 15 minutes to check if it contains water. If the oil contains water, a likely cause is defective
mechanical seal, which requires that mixer be disassembled and repaired;
3. Fill oil into the gear box chamber with new oil (for quantity see the charts below);
4. Clean and refit the oil plug (pos. B). Use Loctite 243 threadlocker.
caution
Oil type: CASTROL ALPHA SP 220 or equivalent with ISO Viscosity Grade (Kinematic viscosity at 40°C) ≥ 220 cSt, Flash
point ≥ 200°C.
34
• Changing oil
• Changing the mechanical seal
• Replace rubber parts
Overhaul
The mixer must be overhauled even if appears normal during operation. Especially, the mixer may need to be
overhauled earlier if it is used continuously.
• Changing oil
• Changing the mechanical seal
• Changing bearings
• Replace rubber parts
M8 M10 M12 M16
22 44 76 187
M20 M24 M30
364 629 1240
better together