7.4
Replacement of knives
The mower knives come in 2 different versions for discs with
LH or RH rotation. The front of the cutting edge has to point
downward, viewed in the direction of rotation of the disc (fig.
23).
The mower knives have two cutting edges. After one edge is
worn, the knife can be reversed so that the second edge can be
used.
- Knives should always be replaced in pairs in order to keep
the disc balanced.
- Replace worn or damaged nuts and knife bolts.
- Type “S”:
- use new knife bolts together with a locking agent, or
apply Loctite 243 to the threaded part of the bolt;
- tighten the knife bolts with a torque of 50-60 Nm
(5-6 kgm).
- Type “N”:
- use new, self-locking nuts and tighten them with a torque
of 50-60 Nm (5-6 kgm).
7.5
Change of oil in gearboxes
Change the oil of the gearboxes and the drive element of a
new mower (or after assembly of a new gearbox) after
approx. 30 working hours for the first time. After that, oil has
to be changed every 250 working hours.
• Fill the gearbox A (fig. 24) with 1.7 l transmission oil
(GX85W140).
• Fill the gearbox B (fig. 25) with 0.85 l transmission oil
(GX85W140).
• Fill the drive element C (fig. 25) with a carefully measured
quantiry of 0.45 l transmission oil (GX85W140).
Attention! An incorrect oil quantity may lead to
overheating and damage of the element.
• Remove the wear plate to gain access to the draining/
filling plug. Tilt the cutter bar slightly backwards for oil
removal. For filling the drive element, the cutter bar has to
be tilted forwards.
• Change the oil in the drive element more often when
operating the machine in exacting conditions.
42
23
50-60 Nm
(5-6 kgm)
"S"
24
A : 1.7
l
GX85W140
!
25
B : 0.85
l
GX85W140
C : 0.45
l
GX85W140
50-60 Nm
(5-6 kgm)
"N"