Toro 22473, Operator'S Manual

Page: 6 / 16

Setup
1
Installing the Boom and
Digging Chain
Parts needed for this procedure:
1 Boom assembly (sold separately)
1 Chain assembly (sold separately)
Procedure
1. Raise the trencher about 6 inches (15 cm) off of the
ground.
2. Stop the engine and remove the key.
3. Remove the bolt and nut securing the spoils auger
and remove the auger (Figure 3). Save the bolt and
nut for future use.
G008934
1 2
3
4
5
6
7
8
9
Figure 3
1. Spoils auger 6. Jam nut
2. Drive sprocket 7. Adjusting bolt
3. Arm on the drive head 8. Nuts
4. Double washer 9. Boom
5. Bolts
4. Remove the 2 bolts, nuts, and double washers from
the sides of the boom (Figure 3).
5. Loosen the adjusting bolt and jam nut (Figure 3).
6. Slide the boom over the arm on the drive head.
7. Install the 2 bolts, nuts, and double washers removed
previously through the boom and arm, but do not
tighten them.
8. If the chain is not connected, connect the links by
pressing or hammering the clevis pin supplied with
the chain through the links.
Important:
To avoid bending the chain links,
place blocks under and between the links when
hammering the clevis pin through.
9. Secure the clevis pin with the cotter pin supplied
with the chain.
10. Loop the digging chain over the auger drive shaft and
onto the drive sprocket, ensuring that the digging
teeth point forward on the upper span.
11. Set the upper span of the chain into place on the
trencher boom, then wrap the chain around the
roller at the end of the boom.
12. Thread the adjustment bolt into the boom and turn
it in until there is 1-1/2 to 2-1/2 inches (3.8 to 6.3
cm) of slack in the chain on the bottom span.
13. Thread the jam nut down the adjusting bolt and
tighten it securely against the boom.
14. Torque the 2 bolts and nuts securing the boom to
135 to 165 ft-lb (183 to 223 N-m).
2
Installing the Safety Bar
Parts needed for this procedure:
1 Safety bar
1
Safety bar extension (with booms over 2 ft (61 cm)
only)
2 Bolts (with booms over 2 ft (61 cm) only)
2 Locknuts (with booms over 2 ft (61 cm) only)
Procedure
1. Remove the 3 bolts, washers, and flange nuts from
the upper left corner of the trencher frame (Figure 4).
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