Service Rainman Watermaker

Parts / Tools
  • Engine oil: SAE 10W30. Most usefully in a 1l container with an integral spout.
  • Spark plug: NGK CR5HSB, gapped to 60-70 micron.
  • Primary filter: Shield 5 Micron Pleated Sediment Filter Cartridges 10" x 2.5".
  • Primary filter wrench.
  • Pickle: Food-grade Sodium Metabisulphite - made up to 50g / 10l in fresh water.
Method
  • Clean the case with a rag.
  • Check the cover seals. Fix any damage.
  • Clean the strainer with a brush in fresh water.
  • Change the engine oil:
    • Remove the cap / dipstick.
    • Wrap the filler with a rag, place a cup under the filler, and tip the entire unit forward until all of the oil has drained out.
    • Pour in oil until at the top of the dipstick range.
  • Replace spark plug with one that has been cleaned.
  • Primary filter:
    • Remove filter bowl, discard the filter element, and clean the bowl and fittings.
    • Replace filter element and replace bowl.
  • Tighten loose screws.
  • Clean the gauge assembly in fresh water. Wire brush any corroded areas.
  • Pickle the membrane:
  • Flushing prior to pickling.
    • Assemble the water maker and run with fresh water for 10 minutes to flush.
    • Make up 10l of pickle.
    • Run pickle through membrane until bucked almost empty.
    • Cap 3 membrane ports; high-pressure inlet, gauge connection point, product outlet. Use small plastic bags, doubled, and secure with cable ties.

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Service Rainman Watermaker

Parts / Tools Engine oil: SAE 10W30. Most usefully in a 1l container with an integral spout. Spark plug: NGK CR5HSB, gapped to 60-70 micr...