O-Mac MF 2500 Manual page 54

5.5 Throttle trigger lever
Used to regulate the chain speed.
The throttle trigger lever (fig. 12.B) can only be
used if the throttle interlock lever is pressed
simultaneously (fig. 12.C).
The correct running speed will be achieved by
pressing the throttle trigger lever (fig. 12.B) as
far as possible.
5.6 Interlock lever
The interlock lever (fig. 12.C) allows the
throttle trigger lever to be used (fig. 12.B).
5.7 Handle for manual start
For manual engine start-up (fig. 11.D).
5.8 Chain brake
This is a safety braking system that blocks
the chain movement when kickback occurs
during cutting. Kickbacks occur following an
irregular contact of the tip of the bar with
a rapid upward movement of the bar that
causes the hand to strike the front guard (fig.
1.D).
It must be manually released to disengage
the chain brake.
Chain brake disengaged. This is
achieved when the front hand
guard (fig. 1.D) is pulled all the
way back towards the front hand
grip until it clicks into position.
Chain brake engaged. This is
achieved when the front hand
guard (fig. 1.D) is pushed all the
way forward.
Do not use the machine if the chain
brake does not function correctly and have it
inspected by your dealer.
54
VI. Using the machine
IMPORTANT The safety regulations to follow
during machine use are described in Chapter
2. Strictly comply with these instructions to
avoid serious risks or hazards.
6.1 Preparation
Before starting to work, it is necessary to carry
out several checks and operations to ensure
you can work efficiently and in maximum
safety.
IMPORTANT The machine is supplied with
the fuel and chain lubrication oil tanks empty.
6.1.1 Refuelling
Fill with fuel before using the machine. For
preparing the mixture, refuelling methods
and precautionsent see paragraph 7.3.
6.1.2 Filling with chain lubrication oil
Fill with chain lubrication oil before using
the machine. For oil filling methods and
precautionsent see paragraph 7.4.
6.1.3 Checking the chain tension
Perform all operations with the engine off.
Always wear heavy duty gloves.
Check the chain tension.
The tension is correct when the drive links do
not slip out of the chain guides if you hold the
chain in the middle of the bar (Fig. 10).
To adjust the chain tension:
1. loosen the cover nuts, using the supplied
wrench;
2. turn the chain tension adjuster screw (Fig.
8.A) to achieve the desired tension;
3. raise the bar and tighten the guard nuts