Ditch Witch RT120 - Manual (Page 149)

Systems and Equipment - 148
RT120 Operator’s Manual
Chain, Teeth, and Sprockets
Chain, Teeth, and Sprockets
Chain and Tooth Maintenance
• Always replace sprockets at the same time you replace the digging chain. Sprockets and chain are
designed to work together. Replacing one without the other will cause premature wear of the new part.
• Keep digging teeth sharp. Using dull, worn teeth will decrease production and increase shock load to
other trencher components. It can also cause chain stretch, which leads to premature chain wear and
failure.
• Maintain the proper amount of tension on the digging chain. Overtightening will cause chain stretch
and loss of machine performance. For correct tightening procedure, see page 170.
• Use the tooth pattern most appropriate for your digging conditions. If you move to a different soil type,
contact your Ditch Witch dealer for information about the most effective chain type and tooth pattern.
Chain Types
Chain Selection
These charts are meant as a guideline only. No one chain type works well in all conditions. See your Ditch
Witch dealer for soil conditions and chain recommendations for your area. Ask for the latest Chain, Teeth,
and Sprockets Parts Catalog.
• 1 = best
• 2 = better
• 3 = good
• 4 = not recommended
Chain type Features
4-pitch standard chain
2-pitch more teeth for smoother cutting
alternating side bar prevents spoil compaction on chain
bolt-on adapters allow easy configuration changes
Shark Chain II versatile, virtually maintenance-free
combination provides pick and shovel effect
Chain Sandy
Soil
Soft Soil Medium
Soil
Hard Soil Rocky
Soil
Sticky
Soil
4-pitch cup tooth 3 1 2 3 4 1
2-pitch cup tooth 2 3 1 1 3 4
bolt-on adaptor, 2-pitch 4 4 3 2 1 4