General Cleaning Procedure - Sherwood Scuba OASIS BLIZZARD SECOND STAGE Service Manual

GENERAL CLEANING PROCEDURE

20. Thermoplastic, silicone rubber and anodized aluminum parts, such as diaphragms, accent trim, adjustment
knobs, static O-rings, and thermoplastic housings.
a. Soak in a solution of warm water and ordinary liquid dish detergent. Scrub with a soft nylon bristle brush
to remove deposits.
b. Do not subject thermoplastic or rubber parts to ultrasonic cleaning or vinegar solutions.
c. Rinse with fresh water and blow dry with clean low pressure compressed air.
21. Chrome-plated Brass and Stainless Steel parts –
Use a commercial grade Ultrasonic Cleaner with LFW (Lawrence Factor Wash). LFW could be used diluted but
at no less than 50% cleaner-water ratio to ensure good penetration and mineral build up removal. (Follow
manufacturer's recommendations for your particular ultrasonic cleaner brand).
A heated ultrasonic cleaner will accelerate the cleaning process; most mineral buildup on heavily soiled metallic
parts can be cleaned with a 10-15 minute treatment with LFW diluted at 50% on a heated ultrasonic cleaner.
WARNING – When heavy corrosion has developed, metallic parts will lose their chrome-plating
after time. The use of an ultrasonic cleaner may accelerate such loss and a chrome "peeling"
process will increase. If the parts you are intending to clean present heavy corrosion be cautious.
and continue monitoring the parts immersed in the ultrasonic cleaner periodically. Start the
process by using the ultrasonic cleaner for only 2-3 minutes, extract the part (s) and evaluate the
chrome-plating for peeling.
If in doubt clean using just warm water, soap and brush. If after a preliminary cleaning sealing surfaces present
heavy pitting and substantial damage it is advisable to replace the whole part after the pre-inspection.
Alternatively the use of household vinegar or warm water and a brush could be considered as a method to
clean metallic parts but be mindful that such processes may not go to deeper ends of some metallic parts such
as small inner threads, channels, sealing surfaces, etc, and corrosion build up may remain. The use of an
ultrasonic cleaner proves valuable when sealing or friction surfaces can't be reached easily.
Regardless of the method used, rinse all metallic parts right after the cleaning process thoroughly with fresh
water and blow them dry with compressed air.
22. Hoses -
a. Corrosion or mineral deposits on the metallic fittings on hoses may be cleaned using the procedure
presented above provided that care is taken to just dip only the metal fittings at each the end of the hose
into the cleaning solution. Take care to prevent entrance of the solution into the hose interior.
b. Rinsing should include flushing the interior of the hose with fresh water followed by drying with
compressed air.
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