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.