Airmar S650 - Manual (Page 4)

Using the Long Blanking Plug
To protect the paddlewheel, use the long blanking plug when the boat will
be kept in salt water for more than a week, the boat will be removed from
the water, or aquatic growth build-up on the paddlewheel is suspected due
to inaccurate readings from the instrument.
1. Inspect the o-rings on the long blanking plug (replace if necessary) and
lubricate them with the silicone lubricant supplied or petroleum jelly
(Vaseline
® ) (see Figure 4). The o-rings must be intact and well
lubricated to make a watertight seal.
2. Remove the paddlewheel insert from the housing by removing the
safety wire, one safety ring, and the retaining pin.
Do not remove the cap nut (see Figure 2).
3. Grasp the pull ring and remove the paddlewheel insert with a slow
pulling motion.
NOTE: In the unlikely event that the paddlewheel insert cannot be
removed, see “Servicing the Valve Assembly” on page 4.
4. Slide the long blanking plug into the housing with the arrows on the top
pointing forward toward the bow. Seat it into place with a pushing
twisting motion until the keys fit into the notches (see Figure 4). Secure
it with the retaining pin, safety rings, and safety wire (see Figure 2).
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 the paddlewheel shaft out
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 33-113 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 4).
2. Place the new paddlewheel in the cavity with the flat side of the blade
facing the same direction as the arrows on the top of the insert.
3. Tap the new shaft into place until the ends are flush with the insert.
4. Install two of the small o-rings.
5. Place the remaining two small o-rings on the long blanking plug.
Servicing the Valve Assembly
Should the valve fail, remove it for servicing. A replacement Paddlewheel
& Valve Kit 33-415 is available.
WARNING: If the insert is caught in the valve assembly trapping the cap
nut, temporarily hold the short emergency plug in place with the safety
wire. Then separate the insert from the valve assembly. If they cannot be
separated and the sensor must be left unattended, cut the cable to free
the cap nut [a minimum of 1m (3') from the insert]. Later, splice the cable
using Airmar’s Junction Box 33-035.
1. Remove the short emergency plug from the safety wire (see Figure 2).
2. Inspect (replace if necessary) and lubricate the o-ring with silicone
lubricant or petroleum jelly (Vaseline®). The o-ring must be intact and
well lubricated to make a watertight seal.
3. Unscrew the cap nut. With the short emergency plug ready in one hand,
remove the paddlewheel insert and valve assembly as one unit by
pulling upward on the pull ring. Rapidly insert the short emergency plug
to minimize the flow of water into the boat.
NOTE: The plug is not secure until the cap nut is in place.
4. To free the cap nut, remove the paddlewheel insert from the valve
assembly by removing one safety ring and the retaining pin. Grasp the
insert by the pull ring and pull slowly upward.
5. Secure the short emergency plug with the cap nut. Hand-tighten only.
Do not overtighten. Reattach the safety wire.
6. Clean, repair, or replace the valve assembly, so the flap valve moves
freely and seats against the valve housing (see Figure 4).
7. To reinstall the valve assembly and paddlewheel insert, inspect
(replace if necessary) and lubricate all the o-rings with silicone lubricant
or petroleum jelly. The o-rings must be intact and well lubricated to
make a watertight seal.
8. Remove the safety wire and cap nut from the short emergency plug.
With the valve assembly ready in one hand, remove the emergency
plug. Rapidly slide the valve assembly being sure to engage the key in
the notch of the housing. Then slide the paddlewheel insert into the
valve assembly with the arrows on the top pointing forward toward the
bow. Seat it into place with a pushing twisting motion until the keys fit
into the notches. Screw the cap nut in place and hand-tighten only. Do
not over tighten. Reattach the safety wire.
Winterizing
After the boat has been hauled for winter storage, remove the blanking
plug to let the water drain away before reinserting it. This will prevent any
water from freezing around the blanking plug and possibly cracking it.
Replacement Sensor & Parts
The information needed to order a replacement Airmar transducer 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.
Part Airmar Part Number
Blanking Plug 33-376-01
Paddlewheel Kit 33-113
Paddlewheel & Valve Kit 33-415
Cap Nut 04-234-1 (plastic)
02-131-01 (bronze)
Hull Nut 04-004 (plastic)
02-030 (bronze)
Isolation Bushing 04-186-1
Housing, Nut & Washer 33-100 (bronze, low profile, B17)
33-224-01 (bronze, flush, B21)
33-094-01 (stainless steel, SS557)
33-217 (plastic, flush, P217)
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]
AIRMAR Technology Corporationwww.airmar.com
Figure 4. Servicing
paddlewheel
flat side of
shaft
blade
top view of
small
valve
housing
valve housing
flap valve
insert
paddlewheel insert
pull ring
cap nut
notches
key (2)
o-rings
assembly
faces bow
blanking
plug
& blanking plug
medium
o-ring
large o-ring
BOW ►
Copyright © 1996 - 2002 Airmar Technology Corp.