20RTK – 23RTK OPERATOR’S MANUAL 8/31/18 Page 9 of 20
TRENCHING PROCEDURE
1. Follow engine start up procedure.
2. Have engine at full throttle (LEVER forward).
3. Move trencher into position using the SPEED LEVERS.
4. Engage the TRENCH LEVER.
5. Slowly lower the digging boom until the desired trench depth is achieved. See TRENCHING
TIPS for details.
6. Move the SPEED LEVERS in reverse. Start at slow speed. The machine moves BACK when
trenching, not forward.
7. Adjust the travel speed until a workable speed is reached. Use a very slow speed for trenching
and adjust for soil conditions as necessary. Adjust speed to avoid track spin or engine
overloading. If objects such as rocks or roots jam in the chain, release the TRENCH LEVER, then
reverse the chain to dislodge the debris. If necessary move the trencher forward a few inches and
trench the area again.
8. Track speed and direction while trenching can be fine-tuned by using the Adjustable Trenching
Control (ATC) system, which can be placed into position to modify the trenching speed of the
tracks individually while on the go. Individual track controls can be adjusted separately during
operation allowing the operator to keep their trench straight when working on uneven terrain.
TRENCHING TIPS
THE PLUNGE CUT:
If the boom bounces when lowering it, use a more gradual “boom down” action. A little ground travel
toward the operator during the plunge cut may help reduce bounce. Adjust the boom lowering speed
for soil conditions as necessary.
Do not overload engine. If the engine lugs down or the digging chain slows down, raise the boom
until speed increases, then continue lowering the boom slowly.
Do not attempt to force boom down faster than digging chain can remove material.
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