Defender Security 812BF Especificaciones descargar pdf (Pagina 32)

SERVICE INSTRUCTIONS

(TRACKED ONLY)

1. Check that the grease contained in the hydraulic cylinder has

been removed.

2. Mesh the track links in the sprocket and place the other end of

the track on the track-stretching wheel.

3. Rotate the driving gear in reverse and pull the track soles inside

the frame.

4. Position the track using a steel tube and turn the driving gear again.

5. Make sure track links mesh correctly in the sprocket and in the

track stretching wheel.

6. Adjust track tension (see track loosening procedures on page 29).

7. Set the tracked undercarriage on the ground.

WARNING

Make sure that you are always in safe conditions with the machine

lifted to perform the operation for track installing.

INSTALLING THE RUBBER TRACKS

Measuring wear on sprocket and driving gear teeth is one of the most difficult measurements to be

done. You must always consider the point where wear is greatest.

There should always be enough tooth left on the sprocket to engage fully with the rubber track. When

the sprocket meshing distance is reduced significantly the sprocket should be changed.

CHECKING SPROCKET WEAR

Remove gravel or mud when they are jammed between the

sprocket and the track link before loosening the track.

1. Stop your machine on a solid and level surface. Lift it up and

support it in safe conditions.

2. Remove the screws and take off the cover that gives access to

the adjustment system (Fig. 1, page 29).

3. To loosen a track slowly unscrew valve counter-clockwise (Fig. 2,

page 29) only as many turns as necessary to release grease,

(maximum of five turns).

4. If grease does not start to drain out then slowly rotate the track

forward and reverse to free adjuster mechanism.

5. Insert three steel tubes inside the track in the space between the rollers.

6. Rotate the driving gear in reverse so that the steel tubes proceed with the track and engage in

the track-stretching wheel.

7. Exercise force sideways to slide the track and lift it off the track-stretching wheel.

REMOVING THE RUBBER TRACKS

WARNING

The grease contained in the tension ram is under pressure. Never loosen the

grease valve for more than 5 turns. If the valve is loosened too much then

pressurized grease may exit and cause injury to the mechanic. Never loosen

the grease nipple.

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Defender Security 812BF Especificaciones Pagina 32

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