McCulloch MS4016PAVCC, MS4018PAVCC user manual SAW Chain Tension Adjustment, To Install SAW Chain

3 - ASSEMBLY INSTRUCTIONS

TO INSTALL SAW CHAIN:

WARNING

Always wear heavy duty gloves when handling saw chain or making saw chain adjustments.

1.Spread chain out in a loop with cutting edges (A) pointing CLOCKWISE around loop (Figure 3-3F).

2.Slip the chain around the sprocket (B) behind the clutch (C). Make sure the links fit between the sprock- et teeth (Figure 3-3G).

3.Guide the drive links into the groove (D) and around the end of the bar (Figure 3-3G).

NOTE: The saw chain may droop slightly on the lower part of bar. This is normal.

4.Pull guide bar forward until chain is snug. Ensure all drive links are in the bar groove.

5.Install the clutch cover making sure the tang is posi- tioned in the lower hole in the guide bar. Make sure the chain does not slip off of the bar. Install the bar retaining nuts hand tight and follow tension adjust- ment instructions in Section 3-4. (Figure 3-3H)

NOTE: The guide bar retaining nuts are installed only hand tight at this point because saw chain adjustment is required. Follow instructions in Section 3-4, Saw Chain Tension Adjustment.

A

3-3F

B

D

C

3-3G

H

3-3H

3-4. SAW CHAIN TENSION ADJUSTMENT

Proper tension of saw chain is extremely important and must be checked before starting, as well as during any cut- ting operation.

Taking the time to make needed adjustments to the saw chain will result in improved cutting performance and pro- longed chain life.

WARNING

Always wear heavy duty gloves when handling saw chain or making saw chain adjustments.

TO ADJUST SAW CHAIN:

1.Hold nose of guide bar up and turn adjustment screw

(D) CLOCKWISE to increase chain tension. Turning screw COUNTERCLOCKWISE will decrease amount of tension on chain. Ensure the chain fits snugly all the way around the guide bar (Figure 3-4A).

2.After making adjustment, and while still holding nose of bar in the uppermost position, tighten the bar retain- ing nuts securely. Chain has proper tension when it has a snug fit all around and can be pulled around by gloved hand.

NOTE: If chain is difficult to rotate on guide bar or if it binds, too much tension has been applied. This requires minor adjustment as follows:

A.Loosen the bar retaining nuts so they are finger tight. Decrease tension by turning the bar adjustment screw COUNTERCLOCKWISE slowly. Move chain back and forth on bar. Continue to adjust until chain rotates freely, but fits snugly. Increase tension by turning bar adjustment screw CLOCKWISE.

B.When saw chain has proper tension, hold nose of bar in uppermost position and tighten the bar retaining nut securely.

D

3-4A

7