See exploded view and parts list in accordion above.

Target assembly must be partly disassebled when doing maintenance. Top cover is attached to target with Velcro, and is simply pulled up to be picked off. Other parts can be picked off after unscrewing guide pin nuts.

The rubbers at target is worn by penetrating projectiles. This will eventually cause noise to enter the soundproof measuring chamber inside the target.

Such wear normally occurs in the center of the target. To ease maintenance and lower maintenance cost the target is fitted with one or two rubber bands and a foam sheet insert that is covering the centre of the target.

The vertical rubber band must cover the hole, pre-cut or later cut out, of the target rubber skin. This rubber band is intended to be rotated up at the front, and down at the back of the target - to eliminate the wear at centre. 

The horizontal rubber band shall not be used when the target is used for cal .22LR. This rubber band is only beneficial when target is used for big bore calibres, thus enabelig less rotation each time (and less frequent). 

When rubber bands are rotated, the foam sheet should also be replaced.

How often this maintenance is needed depends on calibres in use, bullet shapes, shooting distance and shooter skills (grouping). As a rule of thumb, for this target model, we recommend following intervals based on following shooting distances:

Note that the table above assumes normal full jacketed bullets (except 22LR) and relatively good groupings. If groupings are larger the intervals can be even longer. The use of hunting ammunition may call for more frequent maintenance.

The splice of the rubber band should always be kept at the back of the target. Avoid having the splice at center of target, until the last leg of the rubber band is used. 

The rubber band need to be rotated approximately ½ of the diameter of the cut-out section of the front target rubberskin (leaving fresh rubber at center), if the rubber band isn't worn excessively. For a new target, this would be approcimately 15-20cm (6-8'').

When the horizontal rubber band eventually is rotated ½ roud, it needs to be replaced with a new one. In this event, the upper guide pins need to be removed before putting the new rubber band at target. Soap in spray bottle might be helpful when replacing rubber band, to reduce friction.

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The temperature shields task is to obtain an even temperature inside the target, even if the target is exposed to sunlight. The temperature shields are also worn by the projectiles. Typically the rear temperature shield is worn in the centre section. 

Rear temperature shield will start swelling after a few hundread rounds.
To awoid collapse of measuring chamber, the rear temperature shield is fitted with a a rip-off section.
Rip off when rear temperature shield start swelling, and put the temperature shield back at target with the rip-off section facing target rubber skin.

Expect to replace rear temperature shield when the hole has a diameter of 40cm (15''). 

The temperature shields are also worn by sunlight and other environmental factors. Expect to replace when the temperature shields doesn't maintain physical integrity.

In the event of projectiles passing through the target as they are tilted or otherwise deformed, they may generate large holes in the target rubber skins. 

If the large holes occur in the center of the rubber band(s), scoring issues are prevented by rotating.

If the large holes occur at the main target rubber skin, outside the rubber band, the holes need to be patched. This is done by spray glue and a piece of adhesive tape, or fast curing super glue and a piece of rubber.

The target rubber skin need to be replaced in these events:

The lower sensors (behind the service panel) are rarely subjected to dust and particles as they are put far out to the side. Cleaning them with a soft brush is normally not necessary more often than when replacing target rubber skins. 

However, periodic inspection may be called for, if the inner edge of the target frame is hit by stray bullets. Splinters and woodchips may then cover the sensors, and should be removed.

Target faces are worn by penetrating projectiles. They should be replaced if they provide a poor target profile for the shooter. Fixation nuts (at front of the target) and top cover must be taken off before replacing target face.

The lower part of the target has a service panel that can be opened to access the target electronics and the lower sensors. Opening and closing is done by detaching the white rubber straps at the bottom of the target. 

Inspect the physical integrity of the service panel and its hinges/straps, and check that it's possible to close completely. There should be no cracks that sound can  “leak” through when the service panel is closed. Always keep the service panel closed and strapped, expect when servicing or inspecting the internals of the target.

The white rubber straps will deteriorate over time, and must be replaced when tensile strenght becomes poor.

Sensor cables are put at the outside of the target frame (left and right side). Inspect the outer 10mm of the target frame to see if any stray projectiles possibly has penetrated or snatched any cables. If so, see next chapter how to repair. Sensor cables are easily picked out of the cable channels at the sides of the target to be inspected or replaced.

If sensor cables are completely cut or short circuited, the scoring system will publish warnings, and damaged target will probably stop scoring. However, a snatched or partially damaged cable may not cause problems before it's exposed to moisture. It is therefore wise to periodically evaluate the sensor cables if stray shots has penetrated close to, or trough, the cable channels.