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Huka Skwirrel II Service Manual

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Skwirrel II
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Summary of Contents for Huka Skwirrel II

  • Page 1 Skwirrel II...

  • Page 2: Step

    Welcome to the first edition of the service manual for Skwirrel II. This manual is meant to be a guideline for repairing and servicing the wheelchair in the most efficient way. Good preventive maintenance and fast service provides optimal mobility for our wheelchair users. As Huka we think this is the key factor for happy wheelchair drivers.

  • Page 3: Table Of Contents

    11.2 the intelligent seating module 11.3 the power module safety inhibits of the wheelchair 12.1 inhibits input 12.2 Skwirrel II inhibits system errors programming 14.1 setting up the programming 14.2 programming the driving profiles 14.3 setting the speeds parameters system tests 15.1...

  • Page 4: Taking The Covers Off

    1. Taking the covers off. 1.1 taking the top cover off step 1. Loosen the knob at the back end of the top cover. step 2. Loosen up both knobs at the front of the top cover. step 3. Lift up the rear end of the top cover so the thread pin comes out of the frame tube.

  • Page 5: Taking The Side Panel Covers Off

    1.2 taking the side covers off step 1. Loosen up the bolt in on the front side. step 2. loosen up the screw on the rear end. step 3. take away slowly and carefully the side cover. NOTE: The mounting of the covers will take place in reverse order.

  • Page 6: 2.1 Placing Or Replacing The Batteries

    2.1 Placing or replacing the batteries step 1. Put the seat in its highest position, so it is easier to reach the batteries. Should this be not possible, leave the seat in the position. step 2. Take the top cover of as explained in chapter 1, page 4. loosen the two knobs in the front and the one in the rear and lift the top cover of the chassis.
  • Page 7 step 5. Lift the used batteries out of their boxes using the grip handle on the battery. step 6. If you lift the battery, some rubber buffers will come off. Collect them, because they are needed to secure the new batteries.
  • Page 8 step 9. Connect the cables back on to the battery. WARNING: Make sure you connect the rights poles in to the right cables. Wrong connections lead to short circuit! The information about connecting the batteries is shown on the battery box sticker. step 10.

  • Page 9: Replacing The Main Fuse

    2.2 replacing the main fuse WARNING: If the main fuse is broken, it means there is a serious short circuit or overload of the electronic system. Check the system before replacing the main fuse. step 1. take the main covers off step 2.

  • Page 10: Replacing The Wheels And Tyres

    3. Replacing the wheels and tyres 3.1 replacing the front tyres step 1. First, lift the wheelchair chassis up and place a block underneath the chassis. This way the front wheels are lifted and free from the ground. Make sure the parking brake is still on.
  • Page 11 step 5. Take the wheel of the wheel hub. step 6. Remove the plastic bolt covers of the bolts. step 7. Mark the bolts on the rim. This is important when assembling the rim again. If these bolts are mounted on to the wrong hole, the wheel covers will not fit.
  • Page 12 step 9. Loosen the five bolts which keep the two rim parts together. step 10. Split the rim and remove the tyre and tube. step 11. Put the new tyre and tube on to the rim and bolt the rim back together again.
  • Page 13 step 13. Tighten all five bolts now. step 14. Fill the tyre with air up to 2,5 Bar pressure. step 15. Put the plastic bolt covers on to the five bolts. These bolt covers fixate the plastic wheel cover and prevent it from vibrating during driving.

  • Page 14: Replacing The Rear Tyres

    step 17. Place the wheel cover over the plastic bolt covers. step 18. Tighten the central wheel cover bolt. 3.2 replacing the rear tyres step 1. Lift the rear end of the wheelchair and put a support under the rear axle so the rear wheels are free of the ground. step 2.
  • Page 15 step 3. Loosen the M8 central wheel bolt. step 4. Pull the wheel of the rear axle. step 5. Loosen all five bolts of the rim. step 6. Carefully split the two rim half parts by splitting it with a flat screw driver.
  • Page 16 step 7. Replace the tyre and tube (or the solid tyre). step 8. Place both rim parts back on to the tyre. Make sure you line out the valve opening of the rim. step 9. Tighten the five bolts on the rim. After doing this pump up the tyre up to 2,5 Bar pressure.

  • Page 17: Re-Adjusting The Parking Brake

    step 11. Put the central wheel cover bat in to the hole of the rim. 4. Re-adjusting the parking brake brake lever switched on parking brake released position adjustment tubes close up adjustment tube The parking is using two Bowden cables running from each drive motor to the parking brake lever at the rear end of the chassis.
  • Page 18 step 1. Make sure the Bowden cable is tightened well at the parking brake lever. step 2. Adjust each adjustment tube separately. First loosen the fixation nut of the adjustment tube. Turn the adjustment tube clockwise to decrease the tension of the Bowden cable. Turn the adjustment tube counter clockwise to increase the tension of the Bowden cable.

  • Page 19: Adjusting The Front Suspension

    5. Adjusting the front suspension. The front suspension is by default adjusted to the maximum user weight of 50 kg. Should it be required to change the setting of the suspension take notice of the following steps: step 1. Each spring damper unit has a nut underneath the spring. This nut needs to be moved to change the spring load.

  • Page 20: Replacing Electronic Components

    6. Replacing electronic components of the wheelchair. 6.1 replacing the side steering joystick module. step 1. Switch off the wheelchair and disconnect the cable of the joystick module. step 2. loosen the two bolts underneath the mounting plate. step 3. Replace the unit by a new one.

  • Page 21: Replacing The Desktop Steering Joystick Module

    6.2 replacing the desktop steering joystick module. step1. Disconnect the connector of the joystick module. step 2. Use a flat screwdriver to loosen the bolt of the joystick module guide on one side. step 3. Loosen the other bolt of the joystick module and take away the joystick module guide on one side.

  • Page 22: Replacing The Ism Module

    6.3 replacing the ISM module. step 1. Remove the top cover of the chassis as mentioned on page 4. step 2. Remove the cable connections of the left battery as mentioned on page 6 WARNING: Make sure you isolate the contact of the cables to prevent short circuit errors.

  • Page 23: Replacing The Pm Module

    step 5. Lift the ISM module. Disconnect the cables and replace the module. NOTE: The mounting of the new part will take place in reverse order. After installing the new part, restart the wheelchair so the system can start calibration. After a few seconds the system will tell you to shut down and restart the wheelchair.
  • Page 24 step 4. Loosen the four bolt which hold the ISM on to the battery box. step 5. Lift the ISM module and put it aside so the battery box can be removed. step 6. Loosen the two screws of the plastic side covers. step 6.
  • Page 25 step 7. Lift the battery box out of the frame. step 8. Disconnect the cables from the power module. step 9. Loosen the top bolt of the power module. This bolt works like a lock and holds the power module in place. step 10.

  • Page 26: Replacing Cables

    step 11. Remove the power module from the mounting plate and replace it. NOTE: The mounting of the new part will take place in reverse order. After installing the new power module you need to load the right software program in to the power module using the dongle and the PC program.
  • Page 27 step 4. put the new cable in place and make sure you lead the cable in the exact same way as it was. This is very important. WARNING: Make sure you lead the cable like the old cable. Leading the cable through another way might damage the cable and cause an error step 5.

  • Page 28: Replacing The Cable From The Ism To The Pm

    7.2 replacing the cable from the ISM to the PM. step 1. Remove the cover from the chassis as mentioned on page 4. step 2. Disconnect the cable fro mthe ISM module. step 3. Disconnect the cable from the PM module. step 4.

  • Page 29: Replacing The Lighting Cable Of The Chassis

    7.3 replacing the lighting cable of the chassis. step 1. Remove the cover from the chassis as mentioned on page 4. step 2. Disconnect the rear light left and the rear light on the right side. step 3. Cut the cable ties on the lighting cable in the front of the wheelchair.

  • Page 30: Replacing The Drive Motors

    step 5. Place the new cable into the chassis and connect the cable to the lights. WARNING: The front left and front right lights use different connectors. Make sure the right cable part end up at the right connector. The front left connector is 3-pin, front right connector is 4-pin.
  • Page 31 step 2. Loosen the two bolts of the motor cover. step 3. Take off the motor cover. step 4. Use a multiple pliers to press both lever parts towards each other. Now the Bowden cable can be released from the braking lever.
  • Page 32 step 6. Loosen the central bolt of the wheel cover. step 7. Remove the wheel cover by lifting it with a flat screw driver. step 8. Loosen the five wheel nuts and take the wheel off. step 9. Loosen the 4 bolts of the motor frame.
  • Page 33 step 10. Take the top cover of the chassis as mentioned on page 4. step 11. Disconnect the left battery and lift it out of the battery box. WARNING: Make sure you isolate the contact of the cables to prevent short circuit errors. step 12.
  • Page 34 step 14. Loosen the two screws of the plastic covers on the side of the battery box. step 15. Now place the ISM outside the frame and lift the battery box out of the chassis. step 16. Disconnect the drive motor connector from the power module. step 17.

  • Page 35: Replacing The Actuators

    9. Replacing actuators. 9.1 replacing the seat lift up actuator step 1. Remove the top cover of the chassis. step 2. Loosen the two nuts of the mounting bolt and remove them. step 3. Remove the washers of the bolt. step 4.
  • Page 36 step 5. Push the pin out so the actuator head is released from the lift arm. WARNING: If the seat lift arm is in its lowest position, you can take the pin out without any problem. Should the seat lift NOT be in its lowest position, the actuator is still lifting the seat lift.

  • Page 37: Replacing The Seat Lift Down Actuator

    9.2 replacing the seat lift down actuator. step 1. Remove the top cover of the chassis. step 2. Removed the split pen form the actuator head at the front of the actuator. step 3. Loosen the nuts at from the mounting bolt at the rear end of the actuator.
  • Page 38 step 5. Disconnect the two connectors of the actuator from the ISM module. step 6. Remove the pin out of the actuator head in the front part of the actuator. WARNING: If the seat lift arm is in its highest position, you can take the pin out without any problem.

  • Page 39: Replacing The Seat Tilt Actuator

    9.3 replacing the seat tilt actuator. step 1. Remove the top cover of the chassis. step 2. Move the seat in a position where is easy to reach the rear end mounting bolt of the seat tilt actuator. step 3. Disconnect the actuator from the ISM module.
  • Page 40 step 5. Check also the way the cable has been lead through this area. Make sure you lead the cable back the same way. step 6. Loosen up the adjustment screw of the legrest parallel bar. step 7. Loosen the legrest tube as well. Now you can remove the legrest.
  • Page 41 step 9. Loosen the bolt from the other side and remove it. WARNING: If this bolt is taken out, the seat will drop backwards. Make sure you hold the seat with one hand when you remove top bolt. Now you can slowly tilt the seat backwards.

  • Page 42: Replacing The Seat Tilt Switch

    9.4 replacing the seat tilt switch. step 1. Remove the top cover of the chassis. step 2. Remove the connector of the seat tilt switch from the power module. step 3. cut the cable ties and remove the cable from the seat elevator. WARNING: Make sure you keep in mind how the cable was lead through the wheelchair.
  • Page 43 step 5. Loosen the two bolts which hold the switch mounting plate. step 6. Take out the switch from the seat frame. Now cut the cable ties to release the switch from the mounting plate. step 7. replace the switch and mount a new one to the mounting plate. NOTE: The mounting of the new part will take place in reverse order.

  • Page 44: Lights And Indicators

    10. Lights and indicators 10.1 replacing the head light bulb. step 1. Loosen the screw on the rear side of the headlight. step 2. Rotate the head light glass counter clockwise for around 60 degrees. Now the bayonet locking opens up. step 3.

  • Page 45: Replacing The Indicator Bulb

    10.2 replacing the indicator light bulb. step 1. Remove the upper and lower screw from the indicator glass. NOTE: To remove the lower screw you should use a short screw driver. To reach this lower screw it is also possible to bend the light frame a bit. step 2.
  • Page 46 step 2. Pull the rear light tube out of its socket. step 3. Replace the broken bulb by a new one. step 4. Push the glass back into the fitting and press it until you hear of feel a soft click.

  • Page 47: The Electronic System

    11. The electronic system. The electronic system of the Skwirrel II is based on the R-net system of PGDT. The system is based on three units; The JSM the JoyStick Module, the ISM Intelligent Seat Module and the PM Power Module.

  • Page 48: The Power Module

    11.3 the Power Module. The PM (Power Module), this unit controls and checks the drive motors of the wheelchair. PM module The powermodule (PM) executes the drive commands which come from the JSM module. The unit also receives feedback from the motors. These two kinds of data are checked with each other to make sure the wheelchair does exactly what the user is telling him to do.

  • Page 49: Safety Inhibits Of The Wheelchair

    12. Safety inhibits of the wheelchair. The R-net system uses so called inhibits. These are kinds of safety features which can activate, reduce or block functions of the wheelchair. There are speed reducing inhibits, drive inhibits and seat function inhibits. The inhibits are programmed inside the software of the R-net system.

  • Page 50: Skwirrel Ii Inhibits

    12.2 Skwirrel II inhibits. The following inhibits are installed in the Skwirrel II system: 1. Charge inhibit (bridge inside the charger plug)(message in the display) This inhibit is activated if the charger is connected. It blocks the driving. 2. Flip over joystick module inhibit. (mercury switch inside the JSM module) This inhibit will be activated as soon as the desktop JSM module is flipped over.

  • Page 51: System Errors

    This way you know all previous information is gone. The registration of actual errors will not be “coloured” by old information. NOTE: Should there occur an error message, which is not mentioned on the PGDT.com website, please contact Huka B.V. immediately.

  • Page 52: Programming

    14. Programming. The electronic system of the Skwirrel II can be programmed to fulfil the requirements and needs of the wheelchair user. Programming can be done inv three ways: 1. Onboard programming The programming is done directly on the joystick module. By pushing a certain code using the JSM buttons it is possible to enter the set up mode of the electronic system.

  • Page 53: Programming The Driving Profiles

    14.2 Programming the driving profiles. step 1. The main programming feature is the setting of the driving characteristics of the wheelchair. First, connect the dongle to the R-net system and the PC or laptop. Start up the software program and start up the wheelchair.
  • Page 54 step 3. now we can select one of the parameter groups to program. Click on the + sign left of Profile management...
  • Page 55 step 4. When the group opens up you’ll see there are two standard profiles already programmed. step 5. To add a profile, double click on the field “profile name” of next empty profile column.
  • Page 56 step 6. Give the new profile a name. Double click on the box “profile enable” and select “yes” to activate the new profile. Now the new profile is activated. The next step will to set the driving parameters. step 7. Click on the + sign at the word “speeds”...

  • Page 57: Setting The Speeds Parameters

    NOTE: Detailed information can be found in the programming manual of the R-net system. If there is any hesitation or question about the programming, please contact Huka B.V. 14.3 setting the Speeds parameters. Maximum Forward Speed - (Fwd Speed Max) Sets the forward driving speed of the wheelchair when the joystick is deflected full ahead and the speed setting is at maximum (all 5 bars illuminated).
  • Page 58 Minimum Forward Acceleration - (Fwd Accel Min) Sets the acceleration rate of the wheelchair in the forward direction when the speed setting is at minimum (just 1 bar illuminated). Programmable range is 0 to Maximum Forward Acceleration in steps of 1%. If the Maximum Forward Acceleration is set to a value less than the current value of this parameter, then it will automatically be adjusted to the same as Maximum Forward Acceleration.
  • Page 59 Minimum Reverse Deceleration - (Rev Decel Min) Sets the deceleration rate of the wheelchair in the reverse direction when the speed setting is at minimum (just 1 bar illuminated). Programmable range is 0 to Maximum Reverse Deceleration in steps of 1%. If the Maximum Reverse Deceleration is set to a value less than the current value of this parameter, then it will automatically be adjusted to the same as Maximum Reverse Deceleration.
  • Page 60 If the value is set lower than the Forward Deceleration value, then the latter value will be used. NOTE: More detailed information can be found in the programming manual of the R-net system. If there is any hesitation or question about the programming, please contact Huka B.V.

  • Page 61: System Tests

    Click tools, system test and select PM, status, ISM status, JSM status and Joystick status. NOTE: More detailed information can be found in the programming manual of the R-net system. If there is any hesitation or question about the programming, please contact Huka B.V.

  • Page 62: Pm Status

    15.1 PM status Here you can find important information about the power module (PM). The PM status gives you direct information about: - the communication - battery status - battery voltage - battery current - voltage of M1 (left motor) - current of M1 (left motor) - voltage of M2 (right motor) - current of M2 (right motor)

  • Page 63: Ism Status

    It is very easy to check here first to find out if all the functions are working properly. NOTE: More detailed information can be found in the programming manual of the R-net system. If there is any hesitation or question about the programming, please contact Huka B.V.

  • Page 64: Jsm Status

    By pushing the buttons on the joystick module you can see on the system test of the value of this button is changing. NOTE: More detailed information can be found in the programming manual of the R-net system. If there is any hesitation or question about the programming, please contact Huka B.V.

  • Page 65: Joystick Status

    Let the joystick go and the system will show you that the joystick had returned into the neutral position. NOTE: More detailed information can be found in the programming manual of the R-net system. If there is any hesitation or question about the programming, please contact Huka B.V.

  • Page 66: System Logs

    15.5 system logs R-net is also logging data about errors which occurred during the use of the wheelchair. These data logs are stored in the Joystick Module (JSM), the Intelligent Seating Module (ISM) or the Power Module (PM). Click “tools”, “system logs Now we can click on “read logs”...
  • Page 67 Now we can see al logged information from each module. With these information’s it is much easier to set the right diagnostics for repair. After solving the problem it is best to erase the old logs. This way there is no more old information inside the system and all new messages will be stored again.
  • Page 68 Click “check all” at the system log clear window. Now click on OK. The memory will be cleared. NOTE: More detailed information can be found in the programming manual of the R-net system. If there is any hesitation or question about the programming, please contact Huka B.V.

  • Page 69: Drawings

    16. Drawings...
  • Page 74 NOTES: Huka B.V. Munsterstraat 13 7575 ED Oldenzaal The Netherlands tel. +31 (0) 541 - 572 472 fax. +31 (0) 541 - 520 415 mail: info@huka.nl www.huka.nl...

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