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Secoh SLL-20 Service Manual
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Secoh SLL-20 Service Manual

Air pumps
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SERVICE MANUAL
SECOH AIR PUMPS
Models covered in this manual:
SLL-20, 30, 40 & 50
EL-60, 80-15, 80-17 & 100
EL-120W, 150 & 200
©2007 Parts and Pumps, all rights reserved. No liability is accepted for incorrect application or faulty installation by end user.
www.partsandpumps.co.uk

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Summary of Contents for Secoh SLL-20

  • Page 1 SERVICE MANUAL SECOH AIR PUMPS Models covered in this manual: SLL-20, 30, 40 & 50 EL-60, 80-15, 80-17 & 100 EL-120W, 150 & 200 ©2007 Parts and Pumps, all rights reserved. No liability is accepted for incorrect application or faulty installation by end user.

  • Page 2: Table Of Contents

    Contents Prior to maintenance and Service Maintenance Air filter cleaning / replacement Valve box and diaphragm replacement Resetting auto stopper Magnet replacement Diagnosis of failures Technical Specification Test data (resistance table) Spares Kits and replacement parts ©2007 Parts and Pumps, all rights reserved. No liability is accepted for incorrect application or faulty installation by end user. www.partsandpumps.co.uk...

  • Page 3: Prior To Maintenance And Service

    1. Prior to maintenance and service • Prior to maintenance and service, read and keep this manual carefully. • Follow the safety instructions! • Servicing and maintenance as described in this manual should be carried out by an authorised service facility. •...
  • Page 4 3. Filter element cleaning or replacement a) Undo the truss head screw of the filter cover. b) Remove the filter cover, by firmly pulling it off. c) Remove the filter element and brush off any dust particles by hand. If heavily clogged with dust, wash in a neutral detergent followed by a thorough rinsing in water.

  • Page 5: Valve Box And Diaphragm Replacement

    4. Valve box and diaphragm replacement a) Undo the 4 corner bolts of the overall cover. b) Remove the overall cover. If it is hard to remove, insert a screwdriver in the slot provided. c) Pull out the bushing. d) Remove the shock absorber e) Undo the 4 screws of the holder cover.
  • Page 6 g) Undo the 4 screws of the valve box. h) Slide down the hose clamp, pull off the connecting pipe and remove valve box. i) Undo the nut or bolt and remove the diaphragm (Nut: SLL series & EL-60, 80-15 &...
  • Page 7 l) Install the new valve box and secure into position using the 4 corner screws. m) Replace opposite diaphragm following the above procedure. n) Pull out the magnet support jig. o) Check the magnet is in a central position. Note: The tolerance of the centring of the magnet is within +/- 0.5 mm (see dimension “d”...
  • Page 8 t) Put the shock absorber back into place. u) Insert the power cord bushing into the location notch. Note: It locates into the inner slot! v) Replace the overall cover and secure by using the nuts and bolts. w) Replace filter previously described.
  • Page 9 5. Reset auto stopper (protective switch) Function of auto stopper A running pump with a broken diaphragm may cause a major break down and excessive repair cost. To prevent this from occurring, EL- series pumps are equipped with a protective switch. If the diaphragm is broken, the magnet reciprocates with abnormal amplitude and the projection of the...

  • Page 10: Magnet Replacement

    6. Magnet replacement a) Follow the procedure of section 4 from a) to i). b) Remove diaphragm and pull out opposite diaphragm and magnet from other side. c) Assemble magnet diaphragm with nut or bolt. d) Insert the diaphragm and the magnet between the solenoids.
  • Page 11 Problem Cause Action Pump does not work Power plug is disconnected Plug in and check if electricity is available Cord is broken (Internal wiring Check electrical continuity with damaged) circuit tester Auto stopper activated Open cover to check for damage on diaphragm Excessive noise Valves or diaphragm are...

  • Page 12: Technical Specification

    8. Technical Specifications Model SLL-20 SLL-30 SLL-40 SLL-50 Voltage As shown in the name plate Frequency Applied to 50 Optimal Press. Open Flow L/min Max Power As shown in the name plate Outlet dia. OD 19 mm Weight Standard accessories...
  • Page 13 All parts; magnets, filters, service kits and diaphragms are available from www.partsandpumps.co.uk online site and can be despatched immediately. We also stock a complete range of Secoh pumps for replacement purposes and these can also be used to replace defective pumps of other brands with ease.
  • Page 14 S L L S E R I E S Contents Required kit Part No. Kit Name Parts Code included SLL20 SLL30 SLL40 SLL50 Diaphragm Diaphragm holder Valve box & Diaphragm K-SLL-D valve repair kit EM-0359025 Filter element Filter cover packing Tank base packing...

This manual is also suitable for:

Sll-30Sll-40Sll-50El-60El-80-15El-80-17 ... Show all