9008-35
TM 5-2420-230-24-1
580M WEAR PLATES FOR THE EXTENDABLE DIPPER
Replacing
4. Select shims for the side wear plates so that the
total distance from one wear surface to the other
1. Remove the dipper extension according to the
is 5.75 to 5.79 inches (146 to 147 mm). The wear
instructions in this section.
surface of each side wear plate must be even
with or up to 0.030 inch (0.8 mm) beyond the
2. On 580M machines only, plastic pins are used to
rails on the dipper.
hold the wear plates and the shims in position
during assembly. Usually, these pins wear away
5. Use new plastic pins to install the side wear
during operation. Remove any remaining plastic
plates and shims.
pins. Then remove the wear plates and the
6. Use new plastic pins to install the top and bottom
shims.
wear plates.
3. Remove the grease from the sides and the
7. Apply molydisulfide grease to the rails on the
bottom of the dipper and from the inside of the
dipper.
dipper extension.
8. Install the dipper extension according to the
instructions in this section.
580 SM AND 590 SM WEAR PLATES FOR THE EXTENDABLE DIPPER
Replacing
6. Tighten the bolts to a torque of 52 to 57
pound-feet (70.5 to 77.3 Nm).
1. Remove the dipper extension according to the
7. Select shims for the top and bottom wear plates
instructions in this section.
so that the total distance from one wear surface
2. Remove the bolts, the washers, the wear plates,
to the other is 234 to 235 mm (9.21 to 9.25
and the shims.
inches). The wear surface of each wear plate
must be even with or up to 0.8 mm (0.030 inch)
3. Remove the grease from the sides and the
beyond the rails on the dipper.
bottom of the dipper and from the inside of the
dipper extension.
8. Install the shim(s), the side wear plates, the
stepped washers, and the bolts.
4. Select shims for the side wear plates so that the
total distance from one wear surface to the other
NOTE: On 590 Super M machines only, 9.5 mm (318
is 146 to 147 mm (5.75 to 5.79 inches). The wear
inch) flat washers are used in addition to the stepped
surface of each wear plate must be even with or
washers. Use a 9.5 mm (318 inch) flat washer ONLY
up to 0.8 mm (0.030 inch) beyond the rails on the
when there are no more than three shims installed
dipper.
under that top or bottom wear plate.
5. Install the shim(s), the side wear plates, the
9. Tighten the cap screws to a torque of 70.5 to
stepped washers, and the bolts.
77.3 Nm (52 to 57 pound-feet).
NOTE: On 590 Super M machines only, 9.5 mm (318
10. Apply molydisulfide grease to the rails on the
inch) flat washers are used in addition to the stepped
dipper.
washers. Use a 9.5 mm (318 inch) flat washer ONLY
11. Install the dipper extension according to the
when there is no more than one shim installed under
instructions in this section.
that side wear plate.
CUTTING EDGES
Universal and Heavy Duty Buckets
IMPORTANT: When you remove the bottom weld at
the rear of the bottom cuffing edge, DO NOT cut
Replacing Bottom Cutting Edge
through the bottom of the bucket.
2. Use carbon arc rod or an acetylene cutting torch
1. Remove the bucket teeth. Use carbon arc rod or
to remove the welds that hold the bottom cutting
an acetylene cutting torch to remove the welds.
edge.
H-71
Bur 6-42130
Issued 3-01
Printed in U.S.A.
