20RTK – 23RTK OPERATOR’S MANUAL 8/31/18 Page 8 of 20
THROTTLE CHOKE IGNITION LEFT TRACK RIGHT TRACK
DIGGING BOOM ADJUSTABLE TRENCHING CONTROL (ATC) CHAIN CONTROL
ENGINE START UP PROCEDURE
Only operate trencher outdoors and avoid breathing engine exhaust and fumes.
WARNING: Engine exhaust contains carbon monoxide gas that is toxic. Breathing it can
cause unconsciousness and death. Avoid any areas or actions that expose you to carbon
monoxide.
1. Open the FUEL SHUTOFF VALVE.
2. If the engine is cold, close the CHOKE. Turn choke off (open) after engine warms up enough. To
restart a warm engine, leave the choke in the open position.
3. Move the ENGINE THROTTLE to about 1/3 of the way forward.
4. ELECTRIC STARTER: Turn the ignition key to the START position, and hold it there until the
engine starts. If the engine fails to start within 10 seconds, release the key, and wait at least 10
seconds before operating the starter again.
NOTICE - Using the electric starter for more than 10 seconds at a time will overheat the starter
motor and can damage it.
When the engine starts, release the key, allowing it to return to the ON position.
Open the CHOKE (turn choke off) after the engine warms up enough.
COLD WEATHER OPERATIONS: Before operating in cold weather, refer to the Engine Owner’s
Manual for recommended engine oil. Do not spray starting fluid into the air cleaner as engine damage
could result. If the machine is operated at temperatures below +32°F (0°C) then changing the
hydraulic fluid to ISO 46 is recommended. If you do not want to change the hydraulic fluid but want
to operate the machine at temperatures below +32°F (0°C), then do the following:
• Warm up engine at a low speed.
• Gradually increase engine speed, allowing 30 minutes for the hydraulic fluid to warm up.
Reduce the engine speed if the hydraulic pump whines. Pump noise may indicate a lack of hydraulic
fluid flow that could damage the pump.
For frequent starts below 18°F consult your Barreto Manufacturing, Inc. dealer.
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