Airmar Shorty™ with Valve—S300 - Manual (Page 4)

4
1. Inspect the O-rings on the blanking plug (replace if necessary)
and lubricate them with the silicone lubricant supplied or
petroleum jelly (Vaseline®) (see Figure 3). The O-rings must be
intact and well lubricated for a watertight seal.
2. Remove the safety wire from the cap nut (see Figure 2).
3. To remove the paddlewheel insert from the housing, unscrew the
cap nut. This will jack the insert out of the housing. Do not unscrew
the screws. Replace the paddlewheel insert with the blanking plug.
Seat it into place with a pushing twisting motion until the key fits
into the notch in the housing. Screw the cap nut in place and hand
tighten only. Do not over tighten (see Figure 5).
NOTE: If the flap valves do not move freely and block the
blanking plug from being inserted, clean the valve assembly so
the flap valves move freely and rest against the valve housing.
In the unlikely event that the flap valves cannot be freed, you
may need to push the flap valves down or break them off.
4. Reattach the safety wire to the cap nut to prevent the insert
from backing out in the unlikely event that the cap nut fails or is
screwed on incorrectly (see Figure 2).
Winterizing
After the boat has been hauled for winter storage, remove the
blanking plug to let the water drain away before re-inserting it.
This will prevent any water from freezing around the blanking plug
and possibly cracking it.
Servicing the Paddlewheel Insert
Aquatic growth can impede or freeze the paddlewheel’s rotation
and must be removed. Clean the surface using a Scotch-Brite®
scour pad and mild household detergent. If fouling is severe, push
out the paddlewheel shaft using a spare shaft or a 4D finish nail
with a flattened point. Then, lightly wet sand the surface with fine
grade wet/dry paper.
The water lubricated paddlewheel bearings have a life of up to 5
years on low-speed boats [less than 10kn (11MPH)] and 1 year
on high-speed vessels. Paddlewheels can fracture and shafts can
bend due to impact with water borne objects and mishandling in
boat yards. O-rings must be free of abrasions and cuts to ensure
a watertight seal. A replacement Paddlewheel Kit 33-350-01 is
available.
1. Using the new paddlewheel shaft, push the old shaft out about
6mm (1/4"). With pliers, remove the old shaft (see Figure 5).
2. Place the new paddlewheel in the cavity with the flat side of the
blade facing the same direction as the arrow on the insert top.
3. Tap in the new shaft until the ends are flush with the insert.
4. Install one large and one small O-ring.
5. Place the remaining two O-rings in similar positions on the
blanking plug.
Sensor Replacement & Parts
The information needed to order a replacement Airmar 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.
Lost, broken, and worn parts should be replaced immediately.
Part Airmar Part Number
Blanking Plug 20-288-01
Paddlewheel Kit 33-350-01
Cap Nut 04-011
Hull Nut 04-004
Housing (P371), Valve, and Hull Nut Kit 33-361-01
Obtain parts from your instrument manufacturer or marine dealer.
Gemeco Tel: 803.693.0777
(USA) Fax: 803.693.0477
Email: [email protected]
Airmar EMEA Tel: +33.(0)2.23.52.06.48
(Europe, Middle East, Africa) Fax: +33.(0)2.23.52.06.49
Email: [email protected]
Figure 5. Maintenance
paddlewheel
small
housing
insert
O-ring
blanking
plug
cap nut
paddlewheel
paddlewheel
flap valves
with valve
assembly
(flat side
of blade
faces bow)
notch
large
O-ring
detail
detail
key
shaft
small
O-ring
AIRMAR
®
TECHNOLOGY CORPORATION
35 Meadowbrook Drive, Milford, New Hampshire 03055-4613, USA
www.airmar.com
Copyright © 2004 - 2011 Airmar Technology Corp. All rights reserved.
Copyright © 2000 Airmar Technology Corp.