Krick 20310 Instructions Manual page 9

Type vii b

1 8

L o w e r S h e ll (1 1 )

Now place the lower shell into the hull as per the plan without gluing it into place. Glue together the

motor carrier (27), which is made up of its two plates, and fit it into the lower shell. Fit the two electric

motors to the carrier and both universal joints to the motors. Push the stern tubes and shafts with

screws through the hull and apertures of the lower shell and adjust everything carefully. Once

everything is positioned straight and without tension, fasten the motor frame with fast acting glue and

then carefully glue it with ABS adhesive. Then you can remove the lower shell from the hull. At this

point, it is recommended to equip the motors with interference suppressors and connecting cables.

Once the upper shell is fitted, this job would be much more difficult.

Preparation of Upper Shell:

Cut out the cover areas for the pressure tank upper shell (12) from the outside at the innermost edge

so that the resulting 10mm edge remains as a sealing area. Also cut off the rough edges.

Turn the upper shell over and fit precise pieces of the pine batten (20) into the apertures provided

along the sealing edge. Using the pre-drilled cover, ensure that the joints of the battens do not sit

where the drill holes will be later. Apply the ABS adhesive over the whole of the battens, glue them

into place and press them down with weights until the adhesive is well cured. Thereafter, apply clear

lacquer to the wood.

The pre-drilled covers from the dive set are now used as a template for the holes for the screws in the

upper shell. Attach the covers with adhesive tape to the upper shell so that they cannot shift but leave

all holes free. Now drill the first hole into one corner of the cover and through the upper shell and

carefully through the wood. The best way is to start at a corner, insert a screw to prevent the cover

from shifting, then drill a hole in the diagonally opposite corner and also insert a screw. Drill all

remaining holes in this fashion.

Turn the upper shell over again and countersink all holes from below using an 8mm bit so that the

screw heads are flush. Using epoxy adhesive, glue in the countersunk screws (21) from below. For

this purpose, apply some epoxy adhesive to the underside of the screw head and to the upper 6mm of

the thread, stick the screw into the wooden batten from below and tighten the screw from above using

an M3 nut. Take care that the aperture is well sealed with adhesive. However, no adhesive should

emerge from the top as it could inadvertently glue the nut fast, too.

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