Katadyn Group

Gas stoves 

Gas stoves as stoves don’t need as much maintenance as liquid fuel stoves do. The gas is very clean and easy to use and will almost not leave any soot on the stove or pots. But it is always good to look after your stove.

Regular maintenance include: Cleaning the stove. Make a habit of always keeping the stove clean. Dust and other dirt components will make the stoves life shorter. Use a cloth and if necessary, some methylated alcohol/spirits for cleaning. Regardless of what stove you use you should always check for damages and fuel leaks before lighting the stove.

Liquid fuel stoves 

Every liquid fuel stove demands some maintenance. When the fuel vaporizes there will always some of the fuels additives left in the stove that may eventually clog the burner. In the long run the fuel and heat also wears the o-rings and packings out. Some fuels tend to clog the burner fast while others don’t. Preferably run your stove on the fuel recommended in the manual. With the included multi tool maintenance of Optimus products are simple.

Regular maintenance include:

  • Cleaning the stove. Make a habit of always keeping the stove clean. Dust and other dirt components will make the stoves life shorter. Use a cloth and if necessary, some methylated alcohol/spirits for cleaning. - Replacing wear parts. Some parts in the stoves are wear parts that will finally wear out and must be replaced. Typical ware parts are; nozzle, cleaning needle, o-rings, pump leather cup, filters etc.
  • Cleaning of the fuel ways. As mentioned the burner may get clogged. In Optimus stoves the built in cleaning needle will take care of much but if the stove begins to burn with less power than normal something has probably clogged the nozzle, filter or fuel ways. Clean it carefully with methylated alcohol/spirits.
  • Maintaining o-rings and packings. O-rings and rubber packings need lubricants to work properly. Periodically check for cracks or if they are dry. Use mineral oil or regular car engine oil to lubricate. The pump leather cup may get dry and cause pump malfunction. This is noticed by lack of resistant and pressure build-up when pumping. Use mineral oil and carefully stretch the leather cup to soften it.

Replacing spare parts 

There are ready-made spare parts kits for Optimus stoves. All burner spares can be replaced by using the multi key/burner control key to your stove as a tool. The Optimus stoves are designed to be field maintainable. A good understanding of how an Optimus stove works will provide a good background to maintenance and repair operations. Therefore, please be advised to study the section ’How does an Optimus stove work?’ prior to disassembling your burner unit.

For Optimus Hiker 111C, Optimus Hunter 8R and Optimus Svea 123R:

  1. Make sure the stove has cooled off. Empty the fuel tank.
  2. Unscrew the outer cap (burner head on gasoline stoves).
  3. Using the multi key, unscrew the jet.
  4. Attach multi key to the spindle and turn it to the left until the cleaning needle is released. Lift out (w. a pair of tweezers) or shake out the cleaning needle.
  5. Unscrew the stuffing box by using the cap key of the multi key.
  6. Turn the spindle to the left until it is released from its threading. Pull out the spindle with graphite packing and spindle washer.
  7. Fit new spindle washer and graphite packing on spindle. The conical groove of the washer should face the graphite packing. Screw in the new spindle fully into the burner.
  8. Fit the new stuffing box.
  9. Turn the spindle fully to the right.
  10. Attach the new cleaning needle at the end of a match (or similar) and slide it down through the burner air tube to its position. Make sure the teeth of the needle are facing the teeth of the spindle.
  11. Very gently press the cleaning needle against the spindle while simultaneously turning the spindle slowly appr. 1/2 of a rev. to the left (during this operation, the needle should ‘skip’ 4-5 teeth of the spindle).
  12. With multi key attached to the spindle, turn it fully to the right to make sure the cleaning needle is retracted into the burner.
  13. Fit a new jet tightly and refit the outer cap (burner head for gasoline stoves). Make sure the outer cap is secured (bayonet joint).
  14. Turn the multi key/spindle fully to the left and ensure that the cleaning needle rises through the jet. Turn the spindle to a full right again. Make sure that the valve is fully closed by, for example, pumping up a good pressure in the tank - no air should escape through the jet. If air escapes, the position of the cleaning needle must be readjusted. Follow paragraph 11 above but reduce the number of teeth to ‘skip’ by one.

For Nova:

  1. Make sure the stove has cooled off. Disconnect the fuel bottle.
  2. Flip the burner plate loose using the multi key.
  3. Using the multi key, unscrew the jet.
  4. Turn the stove upside down to shake the magnetic cleaning needle out.
  5. Unscrew the nut for the spindle.
  6. Turn the spindle to the left until it is released from its threading. Pull out the regulator complete with spindle, o-rings and control handle.
  7. Fit new spindle o-rings on spindle. Screw in the new spindle fully into the burner and be careful not to hurt the new o- rings.
  8. Retighten the valve spindle nut and make sure there are no leaks.
  9. Turn the spindle fully to the right.
  10. Put the new cleaning needle in position and refit and tighten the jet. Make sure not to tighten the jet to hard. This may make it very had to unscrew later.
  11. Unscrew the fuel hose wit the multi key and shake the fuel filter out.
  12. Unscrew the nut in the bottom of the burner cup. Pull the burner out of the burner cup and replace the priming wick. Put the burner back and rescrew the nut.
  13. Put the new filter in and fasten the fuel hose. Make sure there are no leaks.
  14. Unscrew the lid on the pump and pull out the complete pump rod. Use the multi key to unscrew the nut holding the pump leather cup. Change the leather cup and fit and tighten the nut.
  15. Using the multi key, unscrew the pump valve with packing. Replace and tighten the valve and make sure there are no leaks.
  16. Put some mineral oil on the pump leather cup, turn it inside out and back a few times and then carefully mount it back in the pump and tighten the lid.
  17. Clip the new burner plate back.

For Optimus Crux:

  1. Make sure the stove has cooled off. Disconnect the fuel canister.
  2. Remove the bad o-ring from the stove base with a small, pin-shaped object. Do not use any sharp object that may damage the stove base or o-ring.
  3. Carefully push the new o-ring into position in the base. Do not use any tool that may damage the o-ring during installation.

Spare parts kits for maintaining Optimus stoves 

Art. No. For Stove Contains 8500 Optimus Nova, Burner plate, pump valve, jet, 2 x O-rings for spindle, cleaning needle, fuel filter, priming wick, pump seal packing, pump leather cup and rubber o-ring for quick coupling. 2914 Optimus Svea, Optimus Hunter, Tank lid packing, Graphite packing, valve spindle, metal ring, stuffing box, cleaning needle.

No. 99 and No. 1000 and jet
2817 Optimus Hiker and No. 10
, Tank lid packing, graphite packing, stainer, valve spindle, metal ring, stuffing box, and pump leather cup, cleaning needle, alcohol jet, multi fuel jet and priming wick. 2907 Optimus Explorer Pump seal packing, graphite packing, rubber o-ring for quick coupling, valve spindle, metal ring, stuffing box, pump leather cup, pump o-ring, cleaning needle, alcohol jet, multi fuel jet, gasoline jet and priming wick.