TM 5-3810-289-12
Section XVII. MAINTENANCE SHOVEL FRONT END EQUIPMENT
4-68.
General
a. This section contains instructions for
replacing the shovel front end equipment and for
maintenance of components. For front end conversion
to a shovel, refer to paragraph 2-8.
b. Refer to paragraph 1-4f for description of
the shovel front end equipment.
c. Use a crane or other adequate lifting device
for removing and installing components of the shovel
front end attachment.
4-69.
Replacement of Shovel Front End Equipment
a. Removal.
(1) Lower boom on support cribbing (fig 2-
(2) Remove shovel dipper and boom
suspension cables (fig. 2-23).
(3) Remove front crowd chain (fig. 2-20).
(4) Remove boom foot locking bolts and
pins.
(5) Propel machine slowly backward until
boom foot is separated from lugs on revolving frame.
b. Cleaning, Inspection and Repair.
Figure 4-57. Shovel dipper assembly, removal and
(1) Clean and inspect boom assembly,
installation.
dipper, and handle, for damaged or missing parts.
Lubricate in accordance with current lubrication order.
4-71.
Shovel Dipper Handle
(2) Repair or replace damaged or
a. General.
The dipper handle, with the
defective components.
saddle lock, is attached to the shipper shaft at the center
c. Installation.
Installation procedure is
of the boom and provides crowd action and support for
reverse of removal, a, above.
the dipper.
b. Removal.
4-70.
Shovel Dipper and Padlock
(1) Lower dipper to rest on blocks and
a. Removal.
remove hoist cable from bail sheave (fig. 4-57).
(1) Lower dipper to rest on blocks, then
(2) Disconnect trip cable from trip lever.
remove hoist cable from bail sheave (fig. 4-57).
Remove nuts from pins securing braces to dipper handle
(2) Disconnect trip cable from trip lever.
and remove pins.
Remove nuts from pins securing braces to dipper
(3) Remove front crowd chain (fig. 2-20).
handle, and remove pins.
(4) Lash saddle block to boom to prevent
(3) Remove nuts and washers from pin
it from changing angles when dipper handle is removed
securing dipper to handle. Remove handle pin and
from shipper shaft.
remove dipper and padlock from handle.
(5) Attach lifting sling to handle with ends
b. Installation.
Installation procedure is
of sling attached three feet from each end of handle.
reverse of removal, a, above. Refer to paragraph 2-8 for
Attach sling to lifting device.
adjustments.
(6) Remove cable guard from end of
handle.
(7) Back machine, slowly, until the handle
is pulled from the saddle block.
(8) Remove cotter pins and washers from
handle pins. Remove handle pins and handle from
dipper.
c. Installation.
Installation procedure is
reverse of removal, b, above.
4-77
