SAW CHAIN TENSION

ADJUSTMENT

!WARNING

Unplug chain saw from power source before adjusting saw chain tension.

!WARNING

Cutting edges on chain are sharp. Use protective gloves when handling chain.

!WARNING

Maintain proper chain tension always. A loose chain will increase the risk of kickback. A loose chain may jump out of guide bar groove. This may injure operator and damage chain. A loose chain will cause chain, guide bar, and sprocket to wear rapidly.

Note: For pre assembled models, the saw chain tension is properly set at factory. A new chain will stretch. Check new chain after first few minutes of operation. Allow chain to cool down. Follow steps below to readjust saw chain tension.

1.Before adjusting chain, make sure guide bar nuts are only finger tight (see Figure 16, page 11). Also make sure adjusting block is in oval adjusting hole on guide bar (see Figure 16 and 17, page 11).

2.Turn adjusting screw clockwise until all slack is out of chain (see Figure 14).

Note: There should be no gap between side links of chain and bottom of guide bar (see Figure 15)

3.Wearing protective gloves, move chain around guide bar. Chain should move freely. If chain does not move freely, loosen chain by turning adjusting screw counterclockwise.

4.After chain tension is correct, tighten guide bar nuts firmly. If not, guide bar will move and loosen chain tension. This will increase the risk of kickback. This can also damage saw. Note: A new chain will stretch. Check new chain after first few minutes of operation. Allow chain to cool down. Readjust chain tension.

Figure 14 - Turning Adjusting Screw

Guide Bar

Nuts

 

Guide Bar

Guide Bar

Correct

Tension

Gap

 

Incorrect Tension

Figure 15- Saw Chain Adjustment

10

100549

 

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Image 10
MasterCraft 100524-01, CS-120CB SAW Chain Tension Adjustment, Guide Bar Nuts Correct Tension Gap Incorrect Tension

100524-01, CS-120CB specifications

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