Alfalaval Toftejorg TZ-67 User manual

Covering:
Standard machines
Machines delivered with ATEX/IECEx Certification in accordance with Directive 2014/34/EU
First published: January 1, 1988
ESE01796-EN13 2019-07
Original manual
Instruction Manual
Alfa Laval ToftejorgTM TZ-67

Table of contents
The information herein is correct at the time of issue but may be subject to change without prior notice
1. EC/EU Declaration of Conformity .................................................................. 5
2. Safety .................................................................................................... 6
2.1. Important information ............................................................................. 6
2.2. Warning signs ..................................................................................... 6
3. Introduction ............................................................................................ 7
3.1. Introduction ........................................................................................ 7
3.2. Intended use ...................................................................................... 7
3.3. Patents and trademarks ......................................................................... 7
3.4. Marking ............................................................................................ 8
3.5. ATEX/IECEx marking ............................................................................. 8
3.6. ATEX/IECEx temperature class and code ...................................................... 9
3.7. Quality system .................................................................................... 9
4. Installation .............................................................................................. 10
4.1. General description ............................................................................... 10
4.2. Functioning ........................................................................................ 10
4.3. General safety and installation instructions ..................................................... 11
4.4. Specific conditions for safe use in accordance with ATEX/IECEx certification .............. 13
5. Operation ............................................................................................... 16
5.1. Normal operation ................................................................................. 16
5.2. Safety precautions ................................................................................ 17
6. Maintenance ........................................................................................... 18
6.1. Service and repair of ATEX/IECEx certified machines ......................................... 18
6.2. Preventive maintenance .......................................................................... 19
6.3. Top assembly ..................................................................................... 20
6.4. Bottom assembly ................................................................................. 22
6.5. Hub Assembly ..................................................................................... 24
6.6. Stem Assembly ................................................................................... 26
6.7. Gear Subassembly ............................................................................... 28
6.8. Replacement of collar bushes ................................................................... 30
6.9. Replacement of ball races ....................................................................... 31
6.10.Replacement of main collars .................................................................... 32
7. Trouble shooting guide ............................................................................... 33
8. Technical data ......................................................................................... 34
9. Product programme .................................................................................. 38
9.1. Standard configurations .......................................................................... 38
9.2. Standard options ................................................................................. 39
9.3. Available add-ons ................................................................................. 39
10. Parts list and drawing, service kits and tools .................................................... 40
10.1.Alfa Laval Toftejorg TZ-67 ........................................................................ 40
10.2.Service kits ........................................................................................ 42
10.3.Tools ............................................................................................... 43
11. General information ................................................................................... 45
11.1.Service and repair ................................................................................ 45
3

Table of contents
The information herein is correct at the time of issue but may be subject to change without prior notice
11.2.How to order spare parts ........................................................................ 45
11.3.How to Contact Alfa Laval Kolding A/S ........................................................ 45
4

1 EC/EU Declaration of Conformity
The Designated Company
Alfa Laval Kolding A/S
Company Name
Albuen 31, DK-6000 Kolding, Denmark
Address
[phone]
Phone No.
hereby declare that
Tank Cleaning Machine
Designation
Alfa Laval Toftejorg TZ-67
Type
From serial number 2019-0001 to 2030-99999
is in conformity with Machinery Directive 2006/42/EC and the following harmonized standard is used:
DS/EN ISO 12100:2011 Safety of Machinery - Risk Assessment
is in conformity with (Ex / ATEX) Directive 2014/34/EU and the following harmonized standards are used:
EN ISO 80079-36:2016, EN ISO 80079-37:2016, DS/EN ISO/IEC 80079-34:2011, Annex A, paragraph A.5.3 Rotating machines
EC Type Examination Certificate no. Baseefa10ATEX0188X and IECEx BAS xx.xxxxX
II 1G Ex h IIC 85ºC... 175ºCGa
Marking: II 1D Ex h IIIC T85ºC... T140ºCDa
The QAN (Quality Assurance Notification) is carried out by SGS Fimko Oy, Särkiniementie 3, Helsinki 00211, Finland. Notified Body No. 0598.
EU Type Examination Certification is carried out by SGS Fimko Oy, Särkiniementie 3, Helsinki 00211, Finland. Notified Body no. 0598.
IECEx Certificate of Conformity is carried out by Baseefa Ltd., Rockhead Business Park, Staden Lane, Buxton, Derbyshire SK17 9RZ, United
Kingdom. IECEx Accepted Certification Body (ExCB).
The person authorised to compile the technical file is the signer of this document.
Global Product Quality Manager
Pumps, Valves, Fittings and Tank Equipment Lars Kruse Andersen
Title Name Signature
Kolding 2019-07-01
Place Date (YYYY-MM-DD)
This Declaration of Conformity replaces Declaration of Conformity dated 2018-10-01
5

2 Safety
Unsafe practices and other important information are emphasized in this manual.
Warnings are emphasized by means of special signs.
Always read the manual before using the tank cleaning machine!
2.1 Important information
WARNING
Indicates that special procedures must be followed to avoid serious personal injury.
CAUTION
Indicates that special procedures must be followed to avoid damage to the tank cleaning machine
NOTE
Indicates important information to simplify or clarify procedures.
2.2 Warning signs
General warning:
ATEX/IECEx warning:
6

3 Introduction
TZ-67
3.1 Introduction
This manual has been prepared as a guide for installing, operating and maintaining your Alfa Laval Toftejorg tank cleaning
machine. Should you require further assistance, our Technical Sales Support department and worldwide net of sales offices will
be pleased to help you. Please quote the type, article and serial numbers with all of your enquiries; this helps us to help you. The
type and serial number are placed on the gear house of the tank cleaning machine.
Get the best and most economical performance from your tank cleaning machine. Insufficient preventive maintenance means
poor performance, unscheduled stops, shorter lifetime and extra costs. On the contrary, good preventive maintenance means
good performance, no unscheduled stops and superior total economy
Warning: Before installing the machine and setting it into operation, carefully read the General safety and installation
instructions (page 11) and the specific conditions for safe use in accordance with ATEX/IECEx Directive
2014/34/EU (page 13) and take all necessary precautions according to your application and local
regulations.
NOTE
The illustrations and specifications contained in this manual were effective at the date of printing. However, as continuous
improvements are our policy, we reserve the right to alter or modify any unit specification on any product without prior notice or
any obligation.
The English version of the instruction manual is the original manual. We make reservations in regard to possible mistranslations in
language versions of the instruction manual. In case of doubt, the English version of the instruction manual applies.
3.2 Intended use
The end-user should verify:
- that the tank cleaning machine is in conformity with respect to tank, vessel or container size in which it is used.
- that the construction materials (both metallic and non-metallic) are compatibility with product, flushing media, cleaning
media, temperatures and pressure under the intended use.
The tank cleaning machine is intended for use in closed tank, vessel or container. If used in open environment see 4.3 General
safety and installation instructions.
To ensure the self cleanability and drainability the machine must be installed in vertical position.
3.3 Patents and trademarks
This Instruction Manual is published by Alfa Laval without any warranty. Improvements and changes to this Instruction Manual
may at any time be made by Alfa Laval without prior notice. Such changes will, however, be incorporated in new editions
of this Instruction Manual.
Alfa Laval Kolding A/S. All rights reserved.
The Alfa Laval logotype is a trademark or a registered trademark of Alfa Laval Corporate AB. "Toftejorg" is a trademark or
registered trademark of Alfa Laval. Other products or company names mentioned herein may be the trademarks of their
respective owners. Any rights not expressly granted herein are reserved.
7

3 Introduction
TZ-67
3.4 Marking
Alfa Laval tank cleaning machines are all marked to allow for recognition of type of machine, machine name, serial number and
manufacturing address. The marking is placed on the gear house of the tank cleaning machine.
“TZ-xx”: TZ machine type
Serial number explanation:
Machines supplied with or without standard documentation:
yyyy-xxxxx: serial number
yyyy: year
xxxxx: 5 digit sequential number
3.5 ATEX/IECEx marking
The Alfa Laval Toftejorg TZ-67 is certified as category I component. The ATEX certification is carried out by the Notified Body
SGS Fimko Oy, who has issued the certificate no. Baseefa10ATEX0188X.
The IECEx certification is carried out by the Certification Body SGS Baseefa Ltd., who has issued the certificate no. IECEx BAS
xx.xxxxX.
Note
Explosion protection type is constructional safety “c”.
The marking on the ATEX/IECEx certified Alfa Laval Toftejorg TZ-67 is as follows:
“TZ-xx”: TZ machine type
Serial number explanation:
Machines supplied with or without standard documentation:
yyyy-xxxxx: serial number
yyyy: year
xxxxx: 5 digit sequential number
8

3 Introduction
TZ-67
3.6 ATEX/IECEx temperature class and code
The maximum surface temperature depends mainly on operating conditions which are the temperature of the cleaning fluid and
the ambient temperature.
Group II EPL Ga
The gas temperature class is corrected with a safety margin of 80% due to a requirement for Group ll EPL Ga equipment.
The gas temperature class depends on the cleaning fluid temperature or the ambient temperature, whichever of the two is
the highest.
Table for determining temperature class (gas atmospheres)
Temperature Class Cleaning fluid Temperature,
Tp(°C)
Ambient temperature,
Tamb (°C)
85°C (T6) ≤+68°C ≤+68°C
100°C (T5) ≤+80°C ≤+80°C
135°C (T4) ≤+108°C ≤+108°C
175°C ≤+140°C ≤+140°C
Group III EPL Da
The dust temperature class depends on the cleaning fluid temperature or the ambient temperature, whichever of the two is
the highest.
No dust layer is considered.
Table for determining temperature class (dust atmospheres)
Temperature code Cleaning fluid temperature,
Tp(°C)
Ambient temperature,
Tamb (°C)
T85°C ≤+85°C ≤+85°C
T100°C ≤+100°C ≤+100°C
T135°C ≤+135°C ≤+135°C
T140°C ≤+140°C ≤+140°C
Example of gas class determination
Cleaning fluid temperature is 67°C and ambient temperature is 75°C.
Gas class = T5
ATEX/IECEx marking on the equipment:
II 1G Ex h IIC 85°C…175°C Ga
II 1D Ex h IIIC T85°C…T140°C Da
3.7 Quality system
The Alfa Laval Toftejorg tank cleaning machines are produced according to Alfa Laval Kolding´s ISO 9001 international
Standard certified quality system.
9

4 Installation
TZ-67
4.1 General description
The Toftejorg TZ-67 is a media driven and media lubricated tank cleaning machine. As it is self lubricating, there is no lubricating
substances such as oil grease etc. in the machine which needs to be regularly changed.
For use in explosive hazard zones the ATEX/IECEx version can be used, provided it is installed according to safety instructions
in local regulations.
4.2 Functioning
The flow of the cleaning fluid passes through a guide and a turbine, which accordingly is set into rotation. The turbine
rotation is through a gearbox transformed into a combined horizontal rotation of the machine body and a vertical rotation of
the nozzles.
The combined motion of the machine body and the nozzles ensures a fully indexed tank cleaning coverage. After 5 5/8
revolutions of the Hub with nozzles (5 3/8 revolutions of the machine body) one coarse cleaning pattern is laid out on the
tank surface. During the following rounds, this pattern is repeated 7 times, each of which is displaced 1/8 of the mesh in
the pattern. After a total of 45 revolutions of Hub with nozzles (43 revolutions of the machine body), a complete cleaning
pattern has been laid out, and the first pattern is repeated.
First cycle Full pattern
The speed of rotation of the turbine depends on the flow rate through the machine. The higher the flow rate the higher the
speed of rotation will be. In order to control the RPM of the machine for a wide range of flow rates, the efficiency of the
turbine can be changed (100% and 0% Turbine/Inlet guide).
Apart from the jet flow through the nozzles, fluid is leaking through the top of the machine, at the hub and through the bottom
cover. The leakage between the moving parts at the top and at the hub are cleaning the gabs and thus preventing build-up
of material that might cause the friction. The flow through the bottom cover is due to the fact that the machine is media
lubricated and that accordingly a flow through the gearbox is needed.
10

4 Installation
TZ-67
4.3 General safety and installation instructions
The tank cleaning machine should be installed in a vertical position (upright or upside down). It is recommended to install a filter
with mesh size of max. 3 mm in the supply line in order to avoid large particles to clog inside the machine. Before connecting the
machine into the system, all supply lines and valves should be flushed to remove foreign matter.
NOTE
The machine shall be installed in accordance with national regulations for safety and other relevant regulations and standards. In
EU-countries the complete system must fulfil the EU-machine Directive and depending of application, the EU-Pressure Equipment
Directive, the EU-ATEX/IECEx Directive and other relevant Directives and shall be CE-marked before it is set into operation.
Warning: Precautions shall be made to prevent starting of the cleaning operation, while personnel are inside the
tank or otherwise can be hit by jets from the nozzles.
For information on use in potential explosive atmospheres see paragraph 4.4 Specific conditions for safe use in accordance with
ATEX/IECEx certification page 13.
To protect your tank coating it is recommended to mount bumpers on the tank cleaning machine.
The machine as delivered has been tested at the factory before shipping. For transportation reasons, the nozzles have been
screwed off after the test. In order to secure the nozzles against falling off due to vibrations and other external strains it is
important that the nozzles are tightened properly after mounting. If not, the nozzles may be blown off during tank cleaning and
cause severe damage on tank, valves and pump. This is especially important if machines are fixed installed in tanks and vessels
within the transportation sector in trucks, railcars and onboard ships.
Normally, it is sufficient to tighten the nozzles with the specified torque. However, depending on the application and local
policies an extra securing may be preferred.
Subject to the intended use, environment and any inhouse user requirements or policies, a liquid threadlocker such as Loctite
No. 243 or equivalent could be used. Other methods could be acceptable and subject to customer preference. For detailed
instruction on pre-cleaning and application of the product carefully follow the instruction on the used locking system.
11

4 Installation
TZ-67
1. Clamp machine firmly in a vice. Protect machine with rubber pad under the machine and use rubber jaws on the vice. Mount
jaws upside down to ensure firm grip on the machine. Set torque wrench at the specified tightening torque.
2. Hold one nozzle with flat spanner to counteract while tightening the opposite nozzle with the torque wrench.
Rubber jaw mounted upside down
Protect with rubber pad
Recommended tightening torque: 40 Nm
3. Check that the machine is in operating condition by inserting 3/16" hex Screwdriver (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.
12

4 Installation
TZ-67
4.4 Specific conditions for safe use in accordance with ATEX/IECEx certification
Directive 2014/34/EU
NOTE
Explosion protection type is constructional safety “c”.
Warning: Operated in a hazardous area
The unit my be operated in a hazardous area only when completely filled with cleaning fluid/steam.
If a medium other than the cleaning fluid/steam is passed through the equipment the flow must not be high
enough to cause the equipment to operate.
Warning: Operating guidance
The unit shall be operated in line with guidance provided by IEC/TS 60079-32-1 for tank cleaning.
Warning: Temperature class and ambient temperature range
The maximum surface temperature depends mainly on operating conditions which are the temperature of the
cleaning fluid and ambient temperature.
The temperature class and ambient temperature range are shown in paragraph 3.6 ATEX/IECEx temperature
class and code, page 9.
Warning: Max. permitted temperature
When working:
The maximum permitted cleaning fluid temperature and ambient temperature is 95°C.
When not working:
The maximum permitted ambient temperature is 140°C.
Warning: Draining using compressed air
Draining using compressed air must not be done in ex classified zone.
Draining using compressed air is possible in non ex classified zones (see page 17).
Warning: Earthing
All metal and other conductive or dissipative material should be connected to earth with the exception of very
small items.
For further information see IEC/TS 60079-32-1:2013 Explosive atmospheres – Part 32-1: Electrostatic hazards,
guidance. With focus on clause 6.2.3, 7.2.1, 7.3, 7.9.2, 13.
Warning: Earthed when in use
The unit must be effectively earthed at all times when in use.
13

4 Installation
TZ-67
4.4 Specific conditions for safe use in accordance with ATEX/IECEx certification
Warning: Max. permitted steaming temperature
The maximum permitted steam temperature through the machine and ambient temperature is 140°C.
Warning: Steaming tanks larger than 100 m³
Tanks with capacities larger than 100 m³ that could contain a flammable atmosphere should not be steam
cleaned, as steam cleaning tanks produces an electrostatically charged mist. Tanks smaller than 100 m³ may
be steam cleaned.
For further information see IEC/TS 60079-32-1:2013 Explosive atmospheres – Part 32-1: Electrostatic hazards,
guidance. With focus on clause 7.10 and 8.5.
Tank size information
The tank cleaning machine has been certified by accredited notified body and can operate in tanks having an enclosed volume
up to 100 m³ as long as all ATEX/IECEx warnings in the instruction manual are complied with.
General guidelines for tanks larger than 100 m3:
Tanks larger than 100 m³ must not be steam cleaned – See guide IEC/TS 60079-32-1:2013 clause 7.10.5 and 8.5
To use the unit in tanks larger than 100m³ is possible under certain conditions.
It is necessary to know the current factors such as tank size, cleaning solvent and product.
Additives can be used in the cleaning solvent, or, for example, the tank can be filled with nitrogen. The basic guidelines are
described in the guide IEC/TS 60079-32-1:2013.
It must be ensured that the equipollently bonding of all conductive metal objects is in accordance with national regulations
for use.
The cleaning fluid conductivity must correspond to the products in the group “High conductivity”, cf. IEC/TS 60079-32-1:2013
clause 7.1 and 7.2.
High conductivity >10000pS/m
Medium conductivity between 25 × εr pS/m and 10 000 pS/m
Low conductivity <25×εrpS/m
For liquids with a dielectric constant of around 2, (e.g. hydrocarbons), these classifications reduce to:
High conductivity >10000pS/m
Medium conductivity between 50 pS/m and 10 000 pS/m
Low conductivity <50pS/m
Following a guidance document such as IEC/TS 60079-32-1:2013 to establish safe use of machinery and process is the users
own responsibility and is not covered by the ATEX/IECEx certification for this unit except for tanks up to 100 m3.Forfurther
information see IEC/TS 60079-32-1:2013 Explosive atmospheres – Part 32-1: Electrostatic hazards, guidance with focus on
clause 7.1.3, 7.1.4, 7.2.1, 7.2.4.
14

4 Installation
TZ-67
4.4 Specific conditions for safe use in accordance with ATEX/IECEx certification
Warning: Process generated electrostatic
The user must address the electrostatic hazards generated from the process of the equipment in accordance
with guidance document IEC/TS 60079-32-1:2013.
Warning: Electrostatically charged liquid
Liquids can become electrostatically charged when they move relative to contacting solids or the spraying of
liquids can also create a highly charged mist or spray. The liquid must be made electrically conductive by
additives or otherwise.
For further information see IEC/TS 60079-32-1:2013 Explosive atmospheres – Part 32-1: Electrostatic hazards,
guidance. With focus on clause 7.1.3, 7.1.4, 7.2.1, 7.2.4.
Warning: Appropriate cleaning fluid
The cleaning fluid should be appropriate for the application (e.g. so no chemical reaction can take place between
the cleaning fluid and the residue of process fluid/powder/compound which can generate heat or a hybrid mixture).
Chemical reactions in Zone 20 - Hybrid mixtures:
End-user must ensure that the cleaning fluid used does not create a hybrid mixture according to IEC
60079-10-1:2015 Annex I.1 in connection with powder / dust residues in the tank in zone 20.
This should ensure that the atmosphere does not change to a classification that lies outside the machine’s
certified scope. When the machine is used for cleaning tanks containing potentially flammable dust atmospheres,
and a potentially flammable fluid is used as the cleaning fluid then an assessment of the hybrid mixture shall be
undertaken by the user, prior to operation.
For further information see IEC 60079-10-1:2015 Explosive atmospheres – Part 10-1: Classification of areas –
Explosive gas atmospheres. With focus on clause 3.6.6 and Annex I – Hybrid mixtures.
Warning: Fluid pressure
The maximum permitted cleaning fluid pressure is 12 bar.
In addition to the above mentioned precautions relating to Directive 2014/34/EU, the Safety Precautions on page 16 must
be observed.
15

5Operation
TZ-67
5.1 Normal operation
Cleaning Media
Use only cleaning media compatible with stainless steel AISI 316/AISI 316L, PFA, A4, ACO212CF and PEEK. Please note
that PEEK is not resistant to concentrated sulfuric acid. Normal detergents, moderate solutions of acids and alkalics will be
acceptable. Aggressive chemicals, excessive concentrations of chemicals at elevated temperatures as well as hydrochlorides
should be avoided. If you are in doubt, contact your local Alfa Laval sales office.
Pressure
Avoid hydraulic shocks. Increase pressure gradually. Do not exceed 12 bar inlet pressure. Recommended inlet pressure
appears from Technical Data (page 34). High pressure in combination with high flow rate increase consumption of wear parts.
High pressure also reduces the cleaning effect.
Draining using compressed air
If the machine is drained using compressed air, then the compressed air pressure must not cause the machine body rotation to
exceed 1.5 rpm (corresponding to approx. 40 sec. per rev of the body) in order to avoid risk of machine breakdown.
Draining should always be done inside the tank.
See paragraph 4.4 Specific conditions for safe use in accordance with ATEX/IECEx certification (page 13).
Steam cleaning
If stream cleaning is done through the machine, the steam pressure must not cause the machine body rotation to exceed 15
rpm (corresponding to approx. 4 sec. per rev of the body) in order to avoid risk of machine breakdown. See paragraph 4.4
Specific conditions for safe use in accordance with ATEX/IECEx certification (page 13).
Temperature
The maximum recommended cleaning fluid is 95oC. The maximum recommended steam temperature is 140oC. The maximum
ambient temperature is 140oC.
See paragraph 4.4 Specific conditions for safe use in accordance with ATEX/IECEx certification (page 13).
After use cleaning
After use flush the machine with fresh water. Cleaning media should never allow to dry or settle in the system due to possible
"salting out" or "scaling" of the cleaning media. If cleaning media contains volatile chloride solvents, it is recommended not to
flush with water after use, as this might create hydrochloric acid.
16

5Operation
TZ-67
5.2 Safety precautions
The machine is intended for use inside a tank only. As peak velocity of main jets reaches 40 m/sec., the Alfa Laval Toftejorg TZ-67
mustnotbeoperatedinopenairorwhentankisopen.
Warning: Hot chemicals and steam under pressure may be used for cleaning and sterilising. Protect against scalding
and burning. Never tamper with or try to open clamps or other connections while system is in operation.
Make sure that system is depressurised and drained before disassembly.
The cleaning jets impinging the tank surface are a source of noise. Depending on pressure and distance to the tank walls, noise
level may reach up to 85 dB.
Warning: Tanks may contain poisonous/hazardous products or products which represent an environmental or
safety risk. Never open tank and dismount the machine without checking previous tank contents and
necessary precautions.
See also 3.6 ATEX/IECEx temperature class and code, page 9.
17

6 Maintenance
TZ-67
6.1 Service and repair of ATEX/IECEx certified machines
All service and repair of ATEX/IECEx certified machines can be performed by Alfa Laval Kolding A/S, Denmark,
or by an Alfa Laval service center approved by Alfa Laval Kolding A/S.
Changes to the machine are not allowed without approval by the person responsible for the ATEX/IECEx
certification at Alfa Laval. If changes are made – or spare parts other than Alfa Laval original spare parts are used
- the EC Type Examination certification (the ATEX/IECEx Directive) is no longer valid.
In order to ensure compliance with the ATEX/IECEx regulations and keep the machine ATEX/IECEx certification
valid, the service or repair must be performed by an authorized person with knowledge of the ATEX/IECEx
requirements and regulations. All spare parts must be original Alfa Laval spare parts and the repair or service
must be done according to the instructions in this manual.
Warning:
If a customer wishes to carry out service or repair himself, it is the responsibility of the repair shop to ensure that
the ATEX/IECEx requirements are met in any way possible. After performing service or repair, the repair shop
thus carries the full responsibility for traceability of all relevant documents in order to ensuring the retention of the
ATEX/IECEx certification of the machine.
18

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=1.5mm
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.
19

6 Maintenance
TZ-67
6.3 Top assembly
Disassembly
1. Remove Screws (15). Loosen with Key (tool No. TE134) and unscrew with Screwdriver (tool No. TE134A).
2. Lift off Nipple (1).
3. Remove Guide/Guide ring (2). The Guide has a groove in the outer diameter. The Guide is easily lifted out of the Stem by
means of two ordinary Screwdrivers inserted into the groove.
4. Remove Screw (15), Spring washer (16) and Washer (13). To secure Impeller against rotation, insert carefully Screwdriver (tool
no. TE134A), through Impeller (4) into a hole in the Stem.
5. Pull off Impeller (4).
Reassembly
1. Reinstall Impeller (4). Make sure that Impeller is correctly rotated to be pushed onto Turbine shaft. Do not try to hammer
Impeller in position, as this will damage Slide bearing under Turbine shaft.
2. Mount Washer (13), Spring washer (16) and Screw (15) and tighten. To secure Impeller against rotation insert carefully
Screwdriver (tool No. TE134A) through Impeller (4) into a hole in the Stem.
3. Reinstall Guide /Guide ring (2).
4. MountNipple(1).MakesurethatitisincorrectpositionoverGuide/Guidering(2).RotateNippletoalignholesinNippleand
Stem.
5. Mount Screws (15) with Screwdriver (tool No. TE134A). Tighten with Key (tool No. TE134).
20