6 - BAR/CHAIN MAINTENANCE
7 - PREVENTIVE MAINTENANCE
6-1. GUIDE BAR MAINTENANCE
WARNING
Ensure that the power cord is disconnected before perform- ing any maintenance on your saw.
Proper maintenance of the guide bar, as explained in this section, is essential to keep your saw in good working order.
GUIDE BAR MAINTENANCE :
Most guide bar problems can be prevented merely by keep- ing the chain saw well maintained.
Incorrect filing and
Insufficient guide bar lubrication and operating the saw with a chain that is TOO TIGHT will contribute to rapid bar wear (see Section
To help minimize bar wear, the following guide bar mainte- nance is recommended.
BAR WEAR - Turn guide bar frequently at regular intervals (for example, after 5 hours of use), to ensure even wear on top and bottom of bar.
BAR GROOVES - Bar grooves (or rails which support and carry the chain) should be cleaned if the saw has been heavily used or if the saw chain appears dirty. Rails should always be cleaned every time the saw chain is removed.
OIL PASSAGES - Oil passages at bar pad should be cleaned to ensure proper lubrication of the bar and chain during operation. This can be done using a soft wire small enough to insert into the oil discharge hole.
TO CLEAN GUIDE BAR RAILS:
1.Remove sprocket cover, bar and chain (see Section 3- 4).
2.Using a screwdriver, putty knife, wire brush or other similar instrument, clear residue from the rails on the guide bar.
This will keep the oil passages open to provide prop- er lubrication to the bar and chain (Figure
3.Reinstall the bar, chain and bar bolt retaining nuts. (See Section
6-1A
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6-2. CHAIN MAINTENANCE INSTRUCTIONS
WARNING
Unless you have experience and specialized training for dealing with kickback (see Safety Precautions), always use a
A low kick saw chain should always be used in combination with other kickback protection devises such as a hand guard and reduced kickback guide bar supplied with the your unit.
Always use a replacement saw chain designed as “low- kickback” or a saw chain which meets the
A standard saw chain (a chain which does not have the kickback reducing guard links) should only be used by an experienced professional chain saw operator.
What is a
A
By keeping the saw chain in good working condition and correctly serviced as recommended in this manual, you will be able to maintain the safety system of your chain saw over the life of the product.
WARNING
Never remove, modify or make inoperative any safety device furnished with your unit. The hand guard, reduced kickback guide bar and low kick back saw chain are major safety features provided for your protection.
WARNING
Always wear heavy duty protection work gloves and discon- nect the extension cord when working on the saw chain.
CHAIN TENSION:
Check the chain tension frequently and adjust as often as necessary to keep the chain snug on the bar, but loose enough to be pulled around by hand. (See Section
BREAKING IN A NEW SAW CHAIN
A new chain and bar will need readjustment after as few as five (5) cuts.This is normal during the
Over a period of time, however, the moving parts of the saw chain will become worn, resulting in what is called CHAIN STRETCH. This is normal. When it is no longer possible to obtain correct chain tension adjustment, a link will have to be removed to shorten the chain. See your McCulloch Authorized Service Center to have this repair performed.
WARNING / CAUTION
Never have more than three (3) links removed from a loop of chain this could cause damage to the sprocket.
7-1. PREVENTATIVE MAINTENANCE
WARNING
SERVICING A DOUBLE INSULATED CHAIN SAW
In this double insulated chain saw, 2 systems of insulation, instead of grounding, are provided. No grounding means is provided on a double insulated chain saw, nor should a means for grounding be added to the chain saw. No serv- iceable parts are inside. A double insulated chain saw is marked with the words, “DOUBLE INSULATION” or “DOU-
BLE INSULATED”. The symbol 
(square within a square) may also be marked on the chain saw.
1.Place switch in OFF position and unplug the power supply before the chain saw is serviced, cleaned, or maintenance is performed.
2.Keep the air intake clean and air vents free of debris to avoid overheating the motor.
3.Clean with a damp sponge and mild soap. Do not squirt with a water hose or douse with water or other liquids.
4.Inspect the saw chain for proper tension before each use and frequently during cutting. Sharpen as required.
5.Clean the guide bar and bar pad to ensure free path for oil.
6.Turn the bar over after each use to achieve even wear.
7.No motor lubrication is necessary. The motor is equipped with lifetime lubricated bearings.
8.If the saw does not operate, turn switch to OFF posi- tion and disconnect the extension cord, first from the power supply, then from the saw. Check the power supply for blown fuses or tripped circuit breakers. If it still does not operate, contact the McCulloch Product Service Department, through the
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