Desa 100271-01 Care of Guide BAR, Sharpening Your SAW Chain, Items Needed to Sharpen Chain

OWNER’S MANUAL

CLEANING AND MAINTENANCE

Continued

CARE OF GUIDE BAR

Uneven bar wear causes most guide bar problems. Incorrect sharpening of chain cutter and depth gauge settings often cause this. When bar wears unevenly, it widens guide bar groove (see Figure 18). This causes chain clatter and rivet popping. Saw will not cut straight. Replace guide bar if this occurs.

Inspect guide bar before sharpening chain. A worn or damaged guide bar is unsafe. A worn or damaged guide bar will damage chain. It will also make cutting harder.

Guide Bar

Groove

	Guide
Normal	Bar
	Guide Bar With

SHARPENING YOUR SAW CHAIN

WARNING: Unplug chain saw from power source before servic- ing. Severe injury or death could occur from electrical shock or body contact with moving chain.

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

Keep chain sharp. Your saw will cut faster and more safely. A dull chain will cause undue sprocket, guide bar, chain, and motor wear. If you must force chain into wood and cutting creates only sawdust with few large chips, chain is dull.

Items Needed to Sharpen Chain

Purchase these items from your local dealer, hardware store, or chain saw supplies outlet.

• 4 mm round file

• Depth gauge tool

6.After each cutter if sharpened, move chain forward to sharpen next cutter. File all cutters on one side of chain.

7.Move to other side of chain and repeat process.

30° Filing

Guide Direction

Mark

File Guide

4 mm

Round File

Note: This illustration shows file guide placement and filing direction for sharpening cutters on left side of chain.

Figure 20 - File and File Guide Placement On Chain

• File guide

Left

Top Plate

Figure 18 - Guide Bar Cross Section Showing Uneven Bar Wear

Normal Guide Bar Maintenance

1.Remove guide bar from chain saw.

2.Remove sawdust from guide bar groove periodically. Use putty knife or wire.

3.Clean oil slots after each day of use.

4.Remove burrs from sides of guide bar. Use flat file to make side edges square.

Replace guide bar when

•bar is bent or cracked

•inside groove of bar is badly worn

Note: When replacing guide bar, see Re- placement Parts, page 14, for proper bar.

Cleaning Groove	Flat	Burr
With Putty Knife	File
Oil
Slot

• Vise

• Medium sized flat file

Sharpening Cutters

Use file guide for 30° filing.

1.Adjust chain for proper tension (see Saw Chain Tension Adjustment, page 8).

2.Clamp guide bar in vise to hold saw steady. Note: Do not clamp chain.

3.Press four millimeter round file (at- tached to file guide) into groove be- tween top plate and depth gauge on chain. File guide should rest on both top plate and depth gauge (see Figures 20 and 21). Note: File at midpoint of guide bar.

4.Hold file guide level. Make sure 30° mark on file guide is parallel to center of guide bar (see Figure 20). This will insure that you file cutters at 30° angle.

5.File from inside towards outside of cut- ter until sharp. Only file in this one direc- tion (see Figure 20). Note: Two or three strokes with file should sharpen cutter.

Side of (right side Groove of chain)

Chain

Depth

Gauge

Groove (left side of chain)

Top Plate	Depth
(left side
of chain)	Gauge
	(right side
	of chain)
	Right
	Side of
	Chain

Figure 21 - Chain Part Locations

Guide Bar

Figure 19 - Guide Bar Maintenance Continued

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