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15. Check the hydraulic fluid level and top it off if
necessary; refer to Checking Hydraulic Fluid.
16. Clean up any spilled fluid.
17. Install the top cover.
Checking the Hydraulic Lines
Service Interval: Every 100 hours—Check the
hydraulic lines for leaks, loose
fittings, kinked lines, loose mounting
supports, wear, weather, and chemical
deterioration and repair if necessary.
Every 1,500 hours/Every 2 years
(whichever comes first)—Replace all
moving hydraulic hoses.
Hydraulic fluid escaping under pressure can
penetrate skin and cause injury. Fluid injected
into the skin must be surgically removed within
a few hours by a doctor familiar with this form
of injury or gangrene may result.
• Keep your body and hands away from pin
hole leaks or nozzles that eject high pressure
hydraulic fluid.
• Use cardboard or paper to find hydraulic
leaks, never use your hands.
Trencher Maintenance
Replacing the Digging Teeth
Service Interval: Before each use or daily—Check the
condition of the digging teeth and
replace any that are worn or damaged.
Due to the high amount of wear placed on the digging
teeth, you will need to replace them periodically.
To replace a single tooth, remove the bolts securing the
tooth to remove it, then install a new tooth in the same
position. Torque the bolts securing the teeth to 27 to 33
ft-lb (37 to 45 N-m).
Checking and Adjusting the
Digging Chain and Boom
Service Interval: Every 25 hours
• Check each link in the chain for excessive wear, such
as links that will no longer hold teeth.
• Inspect the bottom of the boom for wear
• With the trencher parallel to the ground, ensure
that there are 1-1/2 to 2-1/2 inches (3.8 to 6.3 cm)
between the bottom of the boom and the top of the
bottom chain span. If not adjust the chain tension.
Important: Do not over tighten the chain.
Excess chain tension may damage drive
components.
To replace a worn chain, flip or replace a worn boom, or
to adjust the chain tension, use the following procedure:
1. To replace the chain or to flip or replace the boom,
complete the following:
A. Remove the 2 bolts and nuts securing the boom
to the trencher arm
1. Bolts
2. Jam nut
3. Adjusting bolt
38
Figure 59
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