Makita UC3551A, UC4050A, UC4550A Checks, Checking the chain tension, Checking the switch action

Reclaimend

oil

CHECKS

Before starting work, carry out the following checks:

Checking the chain tension

WARNING:

•Always withdraw the mains plug before checking

the chain tension, and wear safety gloves. (For nut models)

006921

Lubricate the saw chain and bar using biologically degradable saw chain oil with an adhesion agent. The adhesion agent in the saw chain oil prevents the oil from being thrown off the saw excessively quickly. Mineral oils must not be used, as they are harmful to the environment.

CAUTION:

•	Prevent the oil from coming into contact with the
	skin and eyes. Contact with the eyes causes
	irritation. In the event of eye contact, flush the
	affected eye immediately with clear water, then
	consult a doctor at once.
•	Never use waste oil. Waste oil contains carcinogenic
	substances. The contaminants in waste oil cause
	accelerated wear of the oil pump, the bar and the
	chain. Waste oil is harmful to the environment.
•	When filling the chain saw with chain oil for the first
	time, or refilling the tank after it has been completely
	emptied, add oil up to the bottom edge of the filler
	neck. The oil delivery may otherwise be impaired.

		2-4 mm
1	3	5
	2
	4
014451

(For lever models)

			2-4 mm
		3	5
1	2	4
014449

1.Loosen

2.Tighten

3.Chain adjusting screw

4.Guide bar

5.Saw chain

1.Loosen

2.Tighten

3.Adjusting dial

4.Guide bar

5.Saw chain

1		1. Oil filler cap
		2. Strap
	2
014386

To fill the oil, perform the following steps:

1.Clean the area around the oil filler cap thoroughly to prevent any dirt from entering the oil tank.

2.Unscrew the oil filler cap and add oil up to the lower edge of the filler neck.

3.Screw the oil filler cap firmly back in place.

4.Wipe away any spilt chain oil carefully.

NOTE:

•When the chain saw is used for the first time, it may take up to two minutes for the saw chain oil to begin its lubricating effect upon the saw mechanism. Run the saw without load until it does so (see "CHECKS ").

The saw chain is correctly tensioned when it is in contact with the underside of the bar and can be raised approximately 2 - 4 mm from the bar by light finger pressure. Check the chain tension frequently, as new chains are subject to elongation.

Excessively high tension of saw chain may cause breakage of saw chain, wear of the guide bar and breakage of the adjusting dial.

A chain which is too loose can jump off the bar, and therefore presents an accident risk.

If the chain is too loose: Refer to the section titled "Adjusting saw chain tension" and adjust the saw chain tension again.

Checking the switch action

CAUTION:

Before plugging in the tool, always check to see that the switch trigger actuates properly and returns to the "OFF" position when released.

To prevent the switch trigger from being accidentally pulled, a lock-off button is provided.

To start the tool, depress the lock-off button and pull the switch trigger. Release the switch trigger to stop.

Do not pull the switch trigger hard without depressing the lock-off button. This may cause switch breakage.

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