Manual Hitachi CH78ED (page 10 of 92) (English, German, Dutch, Danish, French, Italian, Portuguese, Swedish, Spanish, Norwegian, Finnish)

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English

ASSEMBLY PROCEDURES

Handle B (3) and Gathering plate (4) (Fig. 1)

1. Remove the four washers and nuts (1) from cutting blade end.

NOTE

In case of Handle B installation only, remove only the nut on the

longest bolt.

2. Set the gathering plate on the cutter guide, then ﬁ nger tighten

the three washers and nuts.

* Use one each (5) of the two washers, which have been

provided, under the gathering plate or on the two blade-ﬁ xing

bolts from the cutting-blade end to install the gathering plate

on CH105EC (C). (If so equipped)

3. Set the handle B on the longest bolt and ﬁ nger tighten with the

washer and nut.

4. Before securing the ﬁ nger-tightened nuts, screw the blade ﬁ xing

bolts (2) to be seated, then loosen the bolts approx. 1/2 turn.

5. With the bolts set at that position tighten the blade ﬁ xing nuts.

OPERATING PROCEDURES

Fuel (Fig. 2)

WARNING

The hedge trimmer is equipped with a two- stroke engine.

Always run the engine on fuel, mixed with oil.

Provide good ventilation, when fueling or handling fuel.

Fuel

○ Always use branded 89 octane unleaded gasoline.

○ Use genuine two-cycle oil or use a mix between 25:1 to 50:1,

please consult the oil bottle for the ratio or Hitachi dealer.

○ If genuine oil is not available, use an anti-oxidant added quality

oil expressly labeled for air-cooled 2-cycle engine use (JASO

FC GRADE OIL or ISO EGC GRADE). Do not use BIA or TCW

(2-stroke water-cooling type) mixed oil.

○ Never use multi-grade oil (10W/30) or waste oil.

○ Always mix fuel and oil in a separate clean container.

Always start by ﬁ lling half the amount of fuel, which is to be used.

Then add the whole amount of oil. Mix (shake) the fuel mixture. Add

the remaining amount of fuel.

Mix (shake) the fuel-mix thoroughly before ﬁ lling the fuel tank.

Fueling

WARNING (Fig. 3)

○ Always shut oﬀ the engine before refueling.

○ Slowly open the fuel tank (6), when ﬁ lling up with fuel, so that

possible over-pressure disappears.

○ Tighten the fuel cap carefully, after fueling.

○ Always move the unit at least 3 m from the fueling area before

starting.

Before fueling, clean the tank cap area carefully, to ensure that

no dirt falls into the tank. Make sure that the fuel is well mixed by

shaking the container, before fueling.

Starting

CAUTION

Before starting, make sure the cutting attachment does not

touch anything.

1. Set ignition switch (7) to ON position (A). (Fig. 4, 5)

* Push priming bulb (10) several times so that fuel ﬂ ows through

the bulb or return pipe. (If so equipped) (Fig. 6)

2. With the safety lever (8) pressed, pull throttle trigger and push

lock button (9) (If so equipped), then slowly release throttle the

trigger ﬁ rst, then the safety lever. This will lock the throttle in

starting position. (Fig. 4, 5)

3. Set choke lever (11) to CLOSED position (B). (Fig. 7)

4. Pull recoil starter briskly, taking care to keep the handle in your

grasp and not allowing it to snap back. (Fig. 8, 9)

5. When you hear the engine attempts to start, return choke lever

to RUN position (open) (C). Then pull recoil starter briskly

again.

NOTE

If engine does not start, repeat procedures from 2 to 4.

6. After starting engine, allow the engine about 2-3 minutes to

warm up before subjecting it to any load.

Cutting

When cutting, operate engine at full throttle as this maintains proper

cutter speed. When trimming top of hedge, hold trimmer so blades

are between 15 and 30 degrees from a horizontal position and

swing trimmer in an arc toward edge of hedge to sweep cuttings oﬀ .

When trimming sides of hedge, hold blade vertically and swing unit

in an arc.

NOTE

○ Multi-position twist handle (Fig. 10)

In case your trimmer is twist handle type (12), please note that

the cutting angle can be adjusted by loosening handle locking

nut (13). After adjustment has been made, be sure to retighten

the nut.

○ Five positioning twist handle (Fig. 11)

The rear handle can be set in ﬁ ve diﬀ erent positions by pushing

the lock button (14) and turning the rear handle (15).

It is extremely important that the handle is locked in the selected

position.

The lock button can not work while the throttle trigger is being

pulled.

○ The throttle trigger will not work if the rear handle is unlocked.

Stopping (Fig. 12, 13)

Decrease engine speed, and push ignition switch to stop position

(F).

MAINTENANCE

MAINTENANCE, REPLACEMENT OR REPAIR OF THE EMISSION

CONTROL DEVICES AND SYSTEM MAY BE PERFORMED

BY ANY NONROAD ENGINE REPAIR ESTABLISHMENT OR

INDIVIDUAL.

Carburetor adjustment (Fig. 14)

WARNING

○ The cutting attachment may be spinning during carburetor

adjustments.

○ Never start the engine without the complete clutch cover.

Otherwise the clutch can come loose and cause personal

injuries.

In the carburetor, fuel is mixed with air. When the engine is test run

at the factory, the carburetor is adjusted. A further adjustment may

be required, according to climate and altitude. The carburetor has

one adjustment possibility:

T = Idle speed adjustment screw.

Idle speed adjustment (T)

Check that the air ﬁ lter is clean. When the idle speed is correct, the

cutting attachment will not rotate. If adjustment is required, close

(clockwise) the T-screw, with the engine running, until the cutting

attachment starts to rotate. Open (counter-clockwise) the screw

until the cutting attachment stops. You have reached the correct idle

speed when the engine runs smoothly in all positions well below the

rpm when the cutting attachment starts to rotate.

If the cutting attachment still rotates after idle speed adjustment,

contact Hitachi dealer.

000Book_CH50EA.indb 10000Book_CH50EA.indb 10 2009/06/24 9:46:312009/06/24 9:46:31

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Hitachi CH78ED Manual

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