Table of Contents
Advertisement
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
37 to 45 N∙m (27 to 33 ft-lb).
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 can no longer hold teeth.
•
Inspect the bottom of the boom for wear.
•
With the trencher parallel to the ground, ensure
that there are 3.8 to 6.3 cm (1-1/2 to 2-1/2 inches)
between the bottom of the boom and the top of the
bottom chain span. If not, adjust the chain tension.
Important:
Do not overtighten the chain.
Excessive chain tension may damage drive
components.
To replace a worn chain, flip or replace a worn
boom, or adjust the chain tension, use the following
procedure:
1.
Park the machine on a level surface, engage the
parking brake, and lower the hydraulic lift.
2.
Shut off the engine and remove the key.
3.
If you are replacing the chain or flipping or
replacing 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
B.
Loosen the jam nut on the adjusting bolt in
the boom.
C.
Loosen the adjusting bolt until you can
remove the chain from the boom.
D.
Remove the chain from the drive sprocket.
E.
If the chain needs replacing, remove the
bolt and nut securing the spoils auger and
remove the auger and chain.
F.
Remove the boom, flip it over so the bottom
becomes the top (or if you have already
flipped it once, replace it), and install the
boom again.
G.
Replace the nuts, bolts, and washers to
secure the boom.
H.
If you are installing a new chain, connect
the links by pressing or hammering the
clevis pin supplied with the chain through
the links, then secure the clevis pin with the
cotter pin supplied with the chain.
Important:
links, place blocks under and between
the links when hammering the clevis pin
through.
I.
Install the chain over the drive sprocket and
front roller.
J.
If you removed the spoils auger, install
it using the bolt and nut you removed
previously. Torque the bolt and nut to 102
N∙m (75 ft-lb).
K.
Skip to step
4.
Loosen the 2 bolts and nuts securing the boom
to the trencher arm
5.
Loosen the jam nut securing the adjustment bolt.
6.
Turn the adjustment bolt in or out as needed to
achieve the desired tension.
42
Figure 60
To avoid bending the chain
6
to complete the adjustment.
g007841
Hide quick links:
Advertisement
Table of Contents
