Maintenance – Homelite UT74121A User Manual

Page 29

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UK - Page 29

Fig. 55

Fig. 56

RAKER

CLEARANCE

INSPECT DRIVE

SPROCKET

CUTTING

CORNER

SIDE PLATE

DEPTH GAUGE

TOE

GULLET

HEEL

RIVET HOLE

TOP PLATE

SHARPENING THE CUTTERS

See Figures 57 to 62.

Be careful to file all cutters to the specified angles and to
the same length, as fast cutting can only be obtained when
all cutters are uniform.

1.

Wear gloves for protection.

2.

Tension the chain before sharpening.

NOTE:

Refer to “Maintenance – Adjusting the Chain

Tension” earlier in this manual.

3.

Use a 5/32 in. diameter round file and holder. Do all filing
at the midpoint of the bar.

4.

Keep the file level with the top plate of the tooth. Do not
let the file dip or rock.

5.

Using light but firm pressure. Stroke towards the front
corner of the tooth.

6.

Lift the file away from the steel on each return stroke.

7.

Put a few firm strokes on every tooth. File all left hand
cutters in one direction. Then move to the other side
and file the right hand cutters in the opposite direction.

8.

Remove filings from the file with a wire brush.

Fig. 58

RAKER (DEPTH

GAUGE)

CLEARANCE

Fig. 57

Raker (depth gauge) clearance.

See Figure 55.

1. Too low increases the potential for kick-back.

2. Not low enough decreases cutting ability.

If the cutter teeth hit hard objects such as nails and
stones, or are abraded by mud or sand on the wood,
let the Homelite service dealer sharpen the chain.

NOTE:

Inspect the drive sprocket for wear or damage

when replacing the chain. If signs of wear or damage are
present in the areas indicated, have the drive sprocket
replaced by a Homelite service dealer.

See Figure 56.

MAINTENANCE

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