Toro 25200, Руководство оператора

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5. When the digging chain has cleared the drive sprocket,
move the trencher drive control to the N
EUTRAL
position, turn the machine off, and remove the key
(
Figure 43 ).
6. Wrap the lifting strap around the digging chain at
the idler wheel, and attach the strap to the lifting
equipment (
Figure 43 ).
7. Raise the lifting equipment and remove the digging
chain from the boom (
Figure 43 ).
Installing the Digging Chain
Preparing to Install the Digging Chain
1. Start the machine and move the boom to the full up
position.
2. Set the parking brake, turn the machine off, and
remove the key.
3. Remove the bleed plug from the chain tensioner of the
boom; refer to
Checking the Chain Tension (page 18) .
4. Move the idler wheel of the boom forward and down.
5. Install the bleed cap.
6. Start the machine, move the boom to the horizontal
position, turn the machine off, and remove the key.
7. Lay the digging chain on the ground in a straight line,
below the lifting equipment such as a hoist, and with
the cutting face of the teeth pointing toward the path
where you will move the machine (forward) to position
it over the digging chain (
Figure 44 ).
Figure 44
1. Lifting strap 2. Digging chain (teeth down
and forward)
8. At the forward end of the chain, loop a 3.65 m (12
foot) lifting strap with a lifting capacity of 181.4 kg
(400 lb) around the chain at the digging tooth of the
third or fourth link of the chain (
Figure 44 ).
9. Start the machine and position it with trencher over the
digging chain and with the lifting strap forward of the
drive sprocket of the trencher (
Figure 44 ).
Note:
When positioned correctly, the boom of the
trencher is aligned with the digging chain.
10. Turn the machine off and remove the key.
Aligning the Digging Chain
This procedure requires 2 people to align the digging chain to
the machine.
1. Route the ends of the lifting strap forward of the
sprocket hub, on either side of the drive sprocket, and
up past the dirt deflector (
Figure 45 ).
Note:
Move the dirt deflector up and away from the
lifting strap.
Figure 45
1. Lifting strap
4. Drive sprocket
2. Dirt deflector 5. Upper wear strip
3. Digging chain
2. Connect the ends of the lifting strap to the lifting
equipment, and raise the end of the chain until the
drive pins engage the drive sprocket (
Figure 45 ).
3. Start the machine and move the trencher drive control
to the slow forward chain speed position.
Important:
If the chain is not aligned or engaged
with the drive sprocket, turn the machine off,
remove the key, and align the chain to the drive
sprocket.
Note:
The machine drives the chain onto the upper
wear strip of the boom.
Note:
Maintain tension on the strap until the end of
the chain is on the upper wear strip.
4. Lower the lifting strap as the chain moves around the
sprocket and into position on the upper wear strip.
5. Move the trencher drive control to the N
EUTRAL
position when the end of the chain is positioned on top
of the idler wheel of the boom (
Figure 46 ).
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