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Chain Selection (continued)
Soil
Sandy soil
Soft soil
Medium soil
Hard soil
Rocky soil
Sticky soil
Chain
2–pitch cup tooth
4–pitch cup tooth
Alternating side bar
Bolt-on adapter, 2–pitch
Bolt-on adapter, cup tooth
combo
Chain and Tooth Maintenance
• Always replace sprockets at the same time as the digging chain. The sprockets and the
chain are designed to work together. Replacing one without the other will cause
premature wear of the new part.
• Keep the digging chain sharp. Using dull, worn teeth will decrease production and
increase the shock load to the other trencher components. It can also cause chain
stretch, which leads to premature wear and failure.
• Maintain a proper amount of tension on the digging chain. If the machine is too loose or
too tight, efficiency decreases and the parts wear more quickly. Overtightening will cause
chain stretch and loss of machine performance.
• Use the tooth pattern most appropriate for the digging conditions. If conditions change,
contact your Authorized Service Dealer for information about the most effective chain
type and tooth pattern.
Operation: Trench Systems and Equipment
Description
Sugar sand, blow sand, or other soils where sand is the
predominant component
Sandy loam
Loams, loamy clays
Packed clays, gumbo, all compacted soils
Chunk rock, glacial till, cobble, rip rap, gravel
Gumbo, sticky clays
Sandy
Soft
Medium
Soil
Soil
2
3
3
1
4
4
4
3
4
3
Page 3–4
Hard
Rocky
Soil
Soil
Soil
1
1
2
3
4
4
2
1
2
1
Sticky
Soil
3
4
4
1
4
1
2
4
2
4
3462-332 A
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