GMT 050
User manual
40
Saw blade does not make enough contact with wood:
Check the pressure in the accumulator on the side of the tilt frame. Tilt down pressure,
default grapple position: +/- 40 bar (580 psi).
Tilt up pressure, horizontal grapple position: +/- 8 bar (116 psi) extra.
Check regulator valve on saw cylinder.
Saw stutters:
Cause: too much pressure on the tree/branch and/or a lack of liters/flow available to the saw motor.
Adjust or reset regulator valve on the saw cylinder or provide the saw motor with more
liters/flow.
Saw blade does not retract:
Check pressure in the accumulator on the side of the tilt frame. Then check the drain line and
the drain valve. Is the ball valve still closed?
Saw works well in tilt down position, but not in tilt up position:
Pressure in the accumulator on the side of the tilt frame is too high
use the accumulator
test kit to release the pressure.
Saw blade sticks and does not cut straight:
Chain incorrectly sharpened, left and right chain links uneven.
The saw blade is not flush with the saw bracket
turn the long saw bolt further into the saw
bracket by adding one rotation.
The saw blade is bended
replace the saw blade with a new one.
9.3.2
Problems with tilt up, placing grapple in horizontal position
Readjust valve 10.
Unscrew and clean regulator beyond plug ‘N’.
9.3.3
Problems with tilt down, placing grapple in default position
Check drain line and drain valve. Is the ball valve still closed?
Check regulator 7. Unscrew and clean.
Readjust valve 6.
Place grapple in tilt up position, turn off the carrying vehicle and uncouple hose connected to
G.O. (grapple open) nipple on rotator. Does any fluid leak out?
Problem with drain line or
carrying vehicle.