912 Operator’s Manual
12/4/14
Page
6
of 1 2
SAFETY INSTRUCTIONS OVERVIEW (continued)
Never lift trencher over any person at any time.
WARNING
: If trencher should fall it would crush anybody under it.
The trencher is very heavy. DO NOT attempt to manually lift it.
We recommend having a fire extinguisher suitable for petrol fires in the operating area.
Attachments can change the center of mass and machine operations. Use only Barreto
attachments.
912 TRENCHER OPERATING INSTRUCTIONS
READ SAFETY INSTRUCTIONS BEFORE OPERATING!
Be sure that the engine oil, fuel and hydraulic oil are at proper levels before starting the engine.
STUDY AND UNDERSTAND CONTROLS BEFORE BEGINNING OPERATION.
1. FREE WHEELING HUBS: To engage either hub, turn the lock pin handle in (clockwise).
This allows the spring-loaded pin to engage. Repeat for the other wheel. Push the trencher
a bit if necessary until each pin finds a hole to drop into. The hubs are now locked.
Disengaging one hub makes it much easier to turn the trencher when transporting under
power.
2. ENGINE IGNITION: Must be in ON position to start the engine. Move to OFF position to
stop the engine.
3. ENGINE THROTTLE: Controls engine speed. Operate at full throttle.
4. CLUTCH LEVER: Squeeze to activate the Wheel Drive and Dig Chain. All motion
stops when the lever is released. It is located on the left handlebar.
5. WHEEL DRIVE CONTROL: Controls travel direction and speed. Very slow speed is
required for trenching in most conditions. Begin trenching with the wheel control in
neutral. Then adjust the reverse speed when trenching. NOTE: Be sure operator
understands that the machine moves BACK when trenching, not forward.
6. DIG CHAIN ON/OFF CONTROL: To trench, hold the lever in the ON position while
clutch lever is activated. The ON/OFF lever will stay in position as long as the clutch lever
is held. This automatically will activate the CHAIN FORWARD/REVERSE LEVER to
the FORWARD position.
7. CHAIN FORWARD/REVERSE LEVER; Use this lever to reverse chain to help clear
debris from the chain. The clutch lever must be released to put the chain lever in reverse.
8. DIGGING BOOM CONTROL: Pull to raise the digging boom and push to lower the
boom. During normal operation you will hear a relief valve working.
