GMT 050
User manual
32
Valve 7
This valve determines the speed at which tilt up moves to tilt down, i.e. the tipping speed. As soon as
grapple open input stops, the grapple slowly drops to tilt down position. This valve can be adjusted to
suit the individual preferences of the operator.
Adjust as follows: Slightly loosen the locknut and turn in the adjuster bolt all the way to its stopper.
Then operate the tilt up function (grapple open) once. The grapple will now remain in the tilt up
position. Then turn out the adjuster bolt until the desired speed of descent is achieved. Lock the
adjuster bolt with the locknut (by hand is sufficient!).
Hint: high drop speed for light/thin wood. Lower
speed for heavier wood.
Valve 6
This valve ensures that the grapple will only drop to the tilt down position once the saw blade has
retracted into the saw casing. If this valve is turned in too far, the grapple will tilt down during the
sawing process. If it is turned out too far, the grapple will not tilt down at all.
Adjust as follows: Make sure that valve 7 has already been adjusted. Slightly loosen the valve 6 locknut
and turn out the adjuster bolt as far as possible. Place the grapple in tilt up position (grapple open) and
immediately operate the saw input (grapple close). Now turn in the adjuster bolt until the grapple tilts
down as normal. Then check whether the saw blade retracts before the grapple starts to tilt down. If
this is not the case, turn in the adjuster bolt a little further. Lock the adjuster bolt with the locknut (by
hand is sufficient!).