Alfa Laval Toftejorg TZ-67, Инструкция по эксплуатации

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7 Trouble shooting guide
TZ-67
Slow rotation or failure of machine to rotate
Possible Causes Action
No or insufficient liquid flow
a). Check if supply valve is fully open
b). Check if inlet pressure to machine is correct
c). Check supply line and filter for restriction/clogging
d). Remove Nozzles and check for clogging. If blocked, carefully clean Nozzle
without damaging stream straighteners and Nozzle tip.
e). Remove Flange/Nipple, Guide and Impeller (see page 20) and check for
clogging in Impeller area.
If large particles repeatedly get jammed in the machine, install filter or reduce
mesh size of installed filter in supply line.
Foreign material or material build-up
Insert hex Screwdriver in Screw in top of Turbine shaft and easily turn Turbine
shaft clockwise. If any resistance is recognised, disassemble machine in order
to localise the cause.
a). Impeller jammed Remove Guide and Impeller (see page 20) and remove foreign material.
b). Turbine shaft sluggish in Main bush Remove Turbine shaft (see page 22) and clean Main bush.
c). Bevel gears jammed Remove Flange/Nipple and Hub Subassembly (see page 24). Clean teeth on
Stem and Bevel gear.
d). Stem jammed/sluggish Remove Gear Subassembly (see page 28). Check free rotation of Stem.
Remove Stem (see page 26). Remove foreign material/material build-up on
Stem and inside Main collars. Clean Ball races and Ball retainer with balls.
Also clean main bush.
e). Gearbox jammed/sluggish Remove foreign material from Gearbox. Check rotation of shafts. If restriction is
recognized, disassemble gearbox (see page 28) and remove material build up,
especially on 2. Stage Worm wheel and mating Collar bushes.
f). Hub jammed/sluggish Disassemble Hub Subassembly (see page 24). Remove foreign material inside
Hub. Clean Ball races and Ball retainer with balls. Also clean nose of Body.
Wear
a) Slide bearings See page 19.
b) Main bush See page 19.
c) Worm wheels See page 19.
d) Collar bushes See page 19.
e) Turbine shaft Check clearance in Main bush and in Slide bearing. Transverse movement
should not exceed 0.5 mm. Also inspect Worm wheel for wear.
f) Horizontal shaft Check clearance in Collar bushes. Transverse movement should not exceed
0.5 mm. Also inspect worm for wear.
Mechanical defects
a). Worm wheels. Teeth broken Replace Worm wheel.
b). Worm wheel can rotate on Horizontal
shaft/Pinion due to damaged driver faces.
Replace Worm wheel.
c). Damaged teeth on gear Inspect teeth on Stem and Bevel gear for deformation. Mount Bevel gear and
Stem in Body (see page 24 and 26). Hold Body in upside down position and
rotate Hub to check that Bevel gears can work together. If damaged: Replace
Stem and/or Bevel gear.
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