Assembly Procedures; Operating Procedures - Hitachi CG 31EBS Handling Instructions Manual

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ASSEMBLY PROCEDURES

Drive shaft to engine (Fig. 1)
Loosen tube locking bolt (1) about ten turns so that the bolt point will
not obstruct drive shaft tube to be inserted. When inserting drive
shaft tube, hold the tube locking bolt outward preventing inside
fi tting from obstructing as well.
Some models may come with the drive shaft already installed.
NOTE
When it is hard to insert drive shaft up to the marked position on
the drive shaft tube, turn drive shaft by the cutter mounting end
clockwise or counter-clockwise. Tighten tube locking bolt lining
up the hole in the shaft tube. Then tighten clamp bolt securely
(1).
Installation of handle
WARNING
When you use steel/rigid blades on straight shaft trimmers or
brush cutters, always use a barrier bar (2) and shoulder harness
with the loop handle. (Fig. 2)
Attach the handle to the drive shaft tube with the angle towards the
engine.
Adjust the location to the most comfortable position before
operation.
NOTE
If your unit has handle location label on drive shaft tube, follow
indication.
Remove the handle bracket (3) from the assembly. (Fig. 3)
Place the handles and attach the handle bracket with four bolts
lightly. Adjust to appropriate position. Then attach it fi rmly with the
bolts.
Attach the protection tube to the drive shaft or handle using cord
clamps (4). (Fig. 4)
NOTE
If the protection tube is set apart from the handle or pipe, it will
be caught by something during operation and it may cause
serious injury. Do not set the protection tube apart from the
handle or pipe.
Throttle wire / stop cord
Remove air cleaner cover. (Fig. 5)
Loosen and remove the screw from the throttle wire holder. (Fig. 7)
Connect the terminals of the stop cords coming out from the engine
and shaft. (Fig. 6)
Hook the throttle wire end on the throttle of the carburetor.
Make sure that the throttle trigger shown in Fig. 18 has returned to
the starting position.
Put the throttle outer end into the groove, and then cover it with the
throttle wire holder and fi x the holder with the screw. (Fig. 8)
Then, install the cleaner cover.
Fix the protection tube which the stop cords and throttle wire are
passing through, on the pipe with the hip pad. Then, as shown in the
fi gure, fi x the protection tube on the pipe and handle with the bands
in the bag.
After fi xing, cut off the extra part of the band not to obstruct the
operation. (Fig. 4)
NOTE
If the protection tube is set apart from the handle or pipe, it will
be caught by something during operation and it may cause
serious injury.
Do not set the protection tube apart from the handle or pipe.
Some models may come with the parts pre-installed.
Installation of blade guard (Fig. 10)
The guard bracket already mounted to the drive shaft tube.
Attach the gear case cover with the three screws.
10
Install the blade guard on drive shaft tube against angle
transmission (5). Tighten the guard bracket fi rmly so that the blade
guard does not swing or move down during operation.
CAUTION
The blade guard must be in place during operation.
If the blade guard is not in place, there is a possibility of serious
injury.
Blade guards are equipped with sharp line limiter. Be careful with
handling it.
NOTE
○ When attaching the guard extension to the blade guard, the
sharp line limiter must be removed from the blade guard.
○ To remove the guard extension, refer to the drawings. Wear
gloves as the extension has a sharp line limiter, then push the
two square tabs on the guard one by one in order after removed
the screw. (Fig. 12)
Installation of cutting blade (Fig. 13)
When installing a cutting blade, make sure that there are no cracks
or any damage in it and that the cutting edges are facing the correct
direction.
Align the notch hole of the cutter holder with the hole on the gear
case (Top the gear case) and insert the Allen wrench to stop turning.
Turn the fi xing nut clockwise and remove the fi xing nut, cutter holder
cap, and toothed lock washers.
The installation of the cutting blade is as follows: insert the Allen
wrench into the notch hole of the cutter holder and the hole on
the gear case. Then, install the cutting blade (check the installing
direction, as referring to Fig. 15), the cutter holder cap and toothed
lock washers onto the cutter holder in this order. Finally, tighten the
fi xing nut securely by turning counterclockwise with the Combi box
spanner. (Fig. 13)
CAUTION
○ When installing the cutting blade, set its center hole to the
convex part of the cutter holder and hold it with the concave
surface of the cutter holder cap. Then, tighten the fi xing nut to
prevent the cutting blade from being eccentric. (Fig. 14)
After installing the cutting blade, be sure to remove the Allen
wrench and Combi box spanner.
○ Before operation, make sure the blade has been properly
installed.
○ Cutter holder cap under a cutting blade, check it for wear
or cracks before operation. If any damage or wear is found,
replace it, as it is an article of consumption.
NOTE
The blade must be retained with a new cotter pin each time
installed. (Fig. 13)
Installation of nylon head (Fig. 16)
Attach cutter holder (6) to the gear case. Insert an Allen wrench
into the hole in the gear case to attach nylon head (7) by turning it
clockwise.
NOTE
Since cutter holder cap is not used here, keep it for next metal
blade use.

OPERATING PROCEDURES

Fuel (Fig. 17)
WARNING
○ The brush cutter is equipped with a two-stroke engine. Always
run the engine on fuel, which is mixed with oil.
Provide good ventilation, when fueling or handling fuel.
○ Fuel contains highly fl ammable and it is possible to get the
serious personal injury when inhaling or spilling on your body.
Always pay attention when handling fuel. Always have good
ventilation when handling fuel inside building.