4
Obtain parts from your instrument manufacturer or marine dealer.
Gemeco Tel: 803-693-0777
(USA) Fax: 803-693-0477
Airmar EMEA Tel: +33.(0)2.23.52.06.48
(Europe, Middle East, Africa) Fax: +33.(0)2.23.52.06.49
Figure 7. 33-105 Figure 8. 33-110
for the S61 for the S63
shear
pin (2)
shaft retainer (2)
shear pins
shaft retainers
Maintenance, Repair & Replacement
CAUTION: Remove the paddlewheel assembly before beaching,
trailering or hauling the boat, since these are the main causes of
speed sensor breakage.
Cleaning
Clean the sensor with a soft cloth and mild household detergent. If
the paddlewheel becomes fouled or inoperable, unsnap the
paddlewheel assembly for cleaning. Severe cases may require
removal of the paddlewheel. Using a small screwdriver, remove
the paddlewheel shaft retainers (see Figures 7 and 8). (If a
retainer is lost, a dab of RTV calk on the end of the shaft will
secure it.)
If necessary, use a stiff brush or putty knife to remove the growth.
Wet sanding is permissible with fine grade wet/dry paper. (If there
is a transducer, be careful to avoid scratching the face.)
Antifouling Paint
Aquatic growth can accumulate rapidly on the sensor’s surface
reducing performance within weeks. Surfaces exposed to salt
water that do not interlock, must be coated with antifouling paint.
Use water-based antifouling paint only. Never use ketone based
paint since ketones can attack many types of plastic. Reapply
paint every 6 months or at the beginning of each boating season.
Sensor Replacement & Parts
The information needed to order a replacement sensor is printed
on the cable tag. Do not remove this tag. When ordering, specify
the part number and date. For convenient reference, record this
information on the top of page one.
Replace broken or worn parts immediately. The water-lubricated
paddlewheel bearings have a life of up to 5 years on low-speed
boats [less than 10kn (11MPH)] and 2 years on high-speed
vessels.
The shear pins on the paddlewheel assembly are designed to
break if excessive force is applied to the speed sensor. For a
replacement S61 snap-in paddlewheel assembly without a cable
(the cable is mounted in the bracket) order part number 33-105
(see Figure 7). For the S63 with the cable mounted in the
paddlewheel assembly, order part number 33-110 (see Figure 8).
Copyright © 1998 2011 Airmar Technology Corp. All rights reserved.
AIRMAR
®
TECHNOLOGY CORPORATION
35 Meadowbrook Drive, Milford, New Hampshire 03055-4613, USA
www.airmar.com
(4 pages)
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