712MT OWNER’S MANUAL REVISED 3/4/22 Page 6 of 15
CHAIN INSTALLATION
CAUTION!!
The chain is quite heavy. You may want help to lift it.
1.
Slide chain under sprocket, with teeth in the correct cutting direction. Properly installed, the
cutting edges of the chain will face forward on the top of the boom and rearward on the
bottom of the boom (see diagram below).
2.
Push digging boom lever forward to lower boom onto the chain.
3.
Wrap chain around boom and sprocket. Install chain master link or link pin and cotter.
4.
Use boom adjuster screw to tighten chain. Chain should have enough slack to allow
approximately 1" (3.81cm) of space between middle of boom and chain when boom and chain
are straight out in a horizontal position. Tighten adjuster screw locknut.
Forward
Cutting edge
Cutting edge
Rearward
OPERATOR TRAINING
Rental companies should demonstrate all of the machine operations to each rental customer
including:
•
Starting the engine.
•
Shutting off gas while transporting.
•
Loading the trencher onto the trailer and securing it for road transport.
•
Unloading the trencher from the trailer.
•
Trenching procedure - Operation of the trencher.
