Defender Security 812BF Especificaciones descargar pdf (Pagina 30)

SERVICE INSTRUCTIONS

(TRACKED ONLY)

CHECKING TRACK TENSION

1. Stop your machine on a flat

and solid surface.

2. Lift it in safe conditions and

put stable supports under

the undercarriage frame to

properly support it.

3. Measure distance A at the

central roller of the undercarriage from the bottom of the roller to the rigid inside surface of the

rubber track. Track tension is normal if dimension A is between 10 and 15 mm.

4. Adjust tension as described in the following paragraph if track tension does not comply with

these dimensions (loose or too tight).

(Be aware the track may be too tight or loose).

TRACK LOOSENING/TIGHTENING PROCEDURES

Track tension is maintained by grease in the adjuster unit. More grease will increase track tension,

less grease will decrease it.

The grease contained in the hydraulic track is pressurized. Never release grease valve (No. 2, Fig. 2)

more than necessary release grease to a maximum of five turns. If the valve is loosened too much

you risk expelling grease under pressure and possible injury to the machine operator. Never loosen

the grease nipple (No. 5, Fig. 2). Remove gravel or mud when they are jammed between the sprocket

and the track link before loosening the track.

1. Remove the screws and take off the cover to access the

adjustment system.

2. To loosen the track turn the valve counter-clockwise slowly until the

grease begins to expell (to a maximum of five turns).

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

forward and reverse to free adjuster mechanism.

WARNING

It is not normal for the track to remain too tight after turning the valve counter-

clockwise or for it to remain loose after introducing grease into the grease

nipple. Never try to remove the tracks or disassemble the track-stretching

cylinder since pressure of the grease inside the track is dangerous.

4. When you have obtained correct track tension then turn valve

clockwise and tighten it. Clean all traces of extruded grease.

5. To stretch the track connect a grease gun to grease nipple and

add grease until track tension is within specified values.

Fig. 1

Fig. 2

1 2 ... 25 26 27 28 29 30 31 32 33 34 35 ... 77 78

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Defender Security 812BF Especificaciones Pagina 30