712MT OWNER’S MANUAL REVISED 3/4/22 Page 3 of 15
TRENCHER ASSEMBLY INSTRUCTIONS
Upon delivery, check for freight damage and/or missing items.
Report any damage immediately to the
carrier and Barreto Manufacturing. Remove trencher from shipping crate.
When documentation refers to “right side” or “left side”, it is relative to the operator’s position with
both hands on the handlebars.
Install cushion pad, boom cushion and boom.
CAUTION!! The boom is heavy.
You may want help to lift it into place (see exploded view
drawing 00476). Push boom onto the boom mount as far as it can go (part of the chain motor housing
weldment). Be sure the adjuster screw is backed out.
SERVICE INFORMATION
HYDRAULIC SYSTEM:
•
Your trencher should arrive with approximately 1.5 U.S. gallons (5.68 liters) of tractor
transmission/hydraulic fluid in the tank. Shipping regulations may prohibit shipping with the
hydraulic fluid. Check the reservoir level using the sight gauge on the side of the tank. If
required, add tractor transmission/hydraulic fluid to the reservoir. For machine use in ambient
temperatures b32°F (0°C) and +90°F (32°C), hydraulic fluid ISO 68 is
recommended. If the machine is operated at temperatures below +32°F (0°C), hydraulic fluid
ISO 46 is recommended.
•
Recheck oil level after trencher has been running and oil has circulated through the
components. Routinely check hydraulic fluid level.
•
Change hydraulic fluid filter after the first 50 hours of use. Change it every 200 hours
thereafter.
•
Add approximately one quart (1 liter) of hydraulic fluid to reservoir with each filter change.
•
Discard the old filter according to environmental standards in your geographic area.
•
To drain hydraulic fluid, remove fitting on the underside of the trencher body.
•
Check all hydraulic fittings for leaks and tighten if necessary.
WARNING
- Running the trencher without hydraulic fluid will cause serious damage to the
hydraulic pump. ENSURE THAT THE RESERVOIR FLUID LEVEL IS VISIBLE IN THE SIGHT
GAUGE BEFORE STARTING THE MACHINE.
IMPORTANT:
If the couplers between the engine and the pump are moved or
removed for any reason, it is CRITICAL that they have a 1/16” gap between them
when reinstalled. Failure to have this gap will result in rapid wear and failure of
your pump!
NOTE:
It is very important to move the fuel shutoff lever to the closed position after stopping
the engine. Failure to do so could cause fuel to leak down into the cylinder and crankcase.
Damage resulting from this will void your engine warranty and not be covered.
IMPORTANT
– Shipping regulations may prohibit shipping with fuel or oil in the engine. Check
levels and add oil and fuel as required before starting engine.
Service the engine according to the
engine owner’s manual before starting.
