10. - Maintenance and storage
GMD 3150/3550/4050 TL CE
57
7N136AGB-A
Disk mower
10.4.2 Knife replacement
- Clean the nut case.
- Place a wooden wedge between two discs to stop
them from rotating.
- Loosen nut using box spanner supplied with the
machine.
- Remove bolt through opening located at the front
of the disc guard.
Knives can be turned over on the same disc to use
the other cutting edge or they can be replaced. On
each knife, an arrow indicates the disc's direction of
rotation.
- Make sure that the securing nut and bolt are in
good condition and if necessary, replace them.
- Torque knife locknut to 12 daNm / 89 lbs ft.
Dull knives require more horse power and have a
negative effect on the cut quality.
10.4.3 Disc replacement
- Place a wooden wedge (1) between two disks to
stop them from moving.
- Remove the 4 bolts (2) and their conical washers
Replace knife lock-nuts and bolts when they
have been removed 5 times.
Replace immediately all worn or distorted
knives. Never straighten a bent knife.
Always replace both knives per disc.
1
2
