6 Maintenance
TZ-67
6.2
Preventive maintenance
In order to keep your tank cleaning machine servicing you as an efficient tool in your tank cleaning operations, it is essential to
maintain its high performance by following a simple preventive maintenance programme, which will always keep your tank
cleaning machine in good condition.
Good maintenance is careful and regular attention!
The following recommended preventive maintenance is based on tank cleaning machines working in average conditions.
However, you will appreciate that a tank cleaning machine, which has a rough and dirty job to do, will need more frequent
attention than one working in ideal conditions. We trust that you will adjust your maintenance programme to suit.
Always use only proper tools. Use Toftejorg TZ-67 standard tool kit. Never force, hammer or pry components together or
apart. Always perform all assembly/disassembly steps in the order described in this manual.
Never assemble components without previous cleaning. This is especially important at all mating surfaces. Work in a
clear well lighted work area.
Note: Recommended tightening torque for all screws: 4-5 Nm.
Every 300 working hours
1. Disassemble machine as described on the following pages.
2. Clean material build-up and deposits from internal parts with Scotch-brite, S-Ultrafine, eventually chemical cleaner and
fine abrasive cloth.
3. Check Slide bearings (position 28 on the cross sectional drawing, page 40) for wear. If hole is worn oval to max. diameter
more than 10.4 mm, Slide bearings should be replaced. If end face of Slide bearing is worn more than x mm into Slide
bearing, it should be replaced.
Under Turbine shaft:
x = 1.5 mm
At Horizontal shaft:
x = 0.5 mm
4. Check Collar bushes (10) in Gear frame. If holes are worn oval to max. diameter more than 13.4 mm, Collar bush should be
replaced. How to replace Collar bushes, see page 30.
Note: Timely replacement of Slide bearings and Collar bushes will prevent costly damage to the gear box.
5. Check Worm wheels (11 and 33). If extremely worn, they should be replaced.
6. Check Main bush (5). If worn it should be replaced.
7. Assemble machines as described in the following pages.
8. Check that the machine is in operating condition by inserting Hex Screw-driver (tool No. TE134A) in screw in top of Turbine
shaft and easily turn Turbine shaft clockwise. If any resistance is recognised, the machine should be disassembled to
localise the cause.
Apart from the parts specifically mentioned above, all the remaining wear parts should regularly be inspected for wear. Which
parts that are wear parts appear from Reference Lists of Parts, page 40.
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