Corrective Maintenance Items; Protective Coating Inspection And Repair - Teledyne WORKHORSE Operation Manual

WorkHorse H-ADCP Operation Manual

Corrective Maintenance Items

Protective Coating Inspection and Repair

TRDI uses paint on the housing for identification and corrosion protection. For more protection, the case
and the transducer assembly are first anodized per MIL-A-8625, Type 3, Class 1 and sealed with sodium
dichromate. Do not damage the surface coatings when handling the H-ADCP.
Inspect the end-cap, housing, and transducer assemblies for corrosion, scratches, cracks, abrasions, paint
blisters, exposed metal (silver-colored aluminum), exposed anodize (black or dark green), and exposed
primer (light blue or yellow for 6000 meter systems).
H-ADCP depends on it.
The procedures contained in this section apply to our standard aluminum systems. For systems
made of other materials, contact TRDI. Read all instructions before doing the required actions.
The chemicals used in the following steps can be hazardous to your health. Read all material
safety data sheets and manufacturer's instructions before handling these chemicals.
If there is any damage to the paint near the edges of the urethane transducer cups or the I/O
connector, DO NOT DEPLOY THE H-ADCP. Return the H-ADCP to TRDI for repair.
To repair or touch up the protective paint:
1. Remove all loose paint without damaging the anodizing. Clean and prepare the damaged area us-
ing a fine-grade abrasive cloth. Feather the edges of the paint near the damaged area. Try to have a
smooth transition between the paint and the damaged area. Do not sand the anodized area. If
there is damage to the anodizing, return the H-ADCP to TRDI for repair.
2. Clean the area with alcohol. Do not touch the area after cleaning.
3. Mix the epoxy primer Part A and Part B using a 1:1 mix. Paint one coat of epoxy primer (see note
below). Allow the primer to dry thoroughly before continuing.
4. Mix the colored paint using two parts color and 1 part catalyst. Paint with one coat of colored paint
(see note below).
The catalyst (hardener) will rapidly harden in air. Mix only the amount of paint you need and
work quickly.
TRDI uses two-part epoxy type paint. This paint is manufactured by Sherwin –Williams Proline
Paint Store, 2426 Main St., San Diego, CA, 92113-3613, Telephone: +1 (619) 231-2313.
Primer Manufacturer's part numbers:
F-158 for 6000 meter systems (part A and part B)
3061 for all other systems (part A and part B)
Colored paint Manufacturer's part numbers:
4800HS, Catalyst,
4800-19, Yellow
4800-28, Orange
4800-01, Snow White
4800-25, Bright Blue
Contact the paint manufacturer for preparation and application procedures for this and other
paints. Contacting this company is done with the knowledge that Teledyne RD Instruments is
not recommending them, but only offering this as a source for the paint.
Be critical in your judgment; the useful life of the
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
May 2015
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