(7)
Assure that right hand saddle block (13)
(7)
Install sprocket (11) on shaft (8) so that
is secure then drive shaft (8) completely out of boom.
splines are in alinement, then drive shaft through
(8)
Lower right hand saddle block (13) to
remaining ear of boom.
the ground.
(8)
Install spur gear (12) and saddle block
(9)
Remove sheave (22) from shaft (8).
(3) on left end of shaft.
(10)
Remove gear (12) from right end of
(9)
When shaft (8) is centered in boom,
shaft (8).
install drum (19) on right end of shaft and secure with
(11)
Remove two capscrew (17), lockwasher
bolts (20), lockwashers (2), and nuts (18).
(16), and guard (14) from saddle block (13).
(10)
Install collar (7) on left end of shaft (8)
(12)
Remove six capscrews (1), lockwashers
and secure with two bolts (6), washers (24), and
(2), slide plates (5), and shims (4) from saddle blocks (3
cotterpins (28).
and 13).
(11)
Install dipper handle and dipper (TM 5-
(13)
Remove fittings (10) and bushings (21)
3810-201-12).
from saddle blocks (3 and 13).
(12)
Lubricate in accordance with LO 5-3810-
(14)
Remove two bearings (9) from boom,
201-12).
and two bearings (9) from each saddle block (3 and 13).
(15)
Remove two fittings (10) from boom.
6-3. Bridle Bar and Boom Point Sheaves
b. Cleaning, Inspection, and Repair.
a. Removal and Disassembly.
(1)
Clean all parts and dry thoroughly.
(1)
Remove cables (TM 5-3810-201-12).
(2)
Inspect saddle blocks, collar, sheave,
(2)
Support weight of boom point sheaves
and drum for cracks or breaks. Inspect rack segment of
(82, fig. 6-2), then remove two cotterpins (26), nuts (30),
dipper handle for cracks, bend, or breaks. Inspect spur
and four washers (29 and 28) from boom point pin (27).
gears for broken teeth, wear, or other damage. Inspect
(3)
Drive boom point pin (27) out of boom
bearings for scoring or excessive wear. Inspect mounting
(19) and remove boom point sheaves (32) and bridle bar
hardware for burs, stripped threads, or other damage.
(12) from boom.
(3)
Repair by welding breaks or cracks,
(4)
Remove
four
capscrews
(7),
straightening bends, or replacing defective components
lockwashers (2), and keeper plates (8) from sheave pins
and mounting hardware.
(11).
(5)
Drive pins (11) out-of bridle bar (12) and
c. Reassembly and Installation.
remove the two sheaves (13).
(1)
Install two bearings (9, fig. 6-1) in each
(6)
Support weight of bridle bar (12) and
saddle block (8 and 18), and in the shaft mounting ears
remove four nuts (1), lockwashers (2), bolts (35), and
of boom.
clamps (36) from bridle bar (12).
(2)
Install bushings (21) and fittings (10) in
(7)
Remove two nuts (17), lockwashers
saddle blocks (3 and 13).
(16), bolts (15), and support straps (14) from boom (19).
(3)
Install shims (4) and plates (5) on saddle
(8)
Remove four nuts (1), lockwashers (2)
blocks (3 and 13) and secure with lockwashers (2) and
bolts (34), and sheave guards (3 and 5) from boom (19).
capscrews (1).
(9)
Remove two nuts (1), lockwashers (2),
(4)
Install sheave guard (14) on right hand
and bolts (24), then remove two rubber bumper blocks
saddle block (13) and secure with lockwasher (16) and
(25) from each side of boom (19).
capscrew (17).
(10)
Remove four bushings (18) from
(5)
Install spur gear (12), sheave (22), and
sheaves (13).
saddle block (13) on right end of shaft (8).
(11)
Remove sleeve (31) and bearing (33)
(6)
Use a suitable hoist or lifting device to
from each sheave (82).
aline shaft (3) with ears of boom, support weight of shaft
(12)
Remove fittings (9) and bushings (10)
and saddle block, then drive left end of shaft (8) through
from pins (11) and sheaves (32).
one ear of boom.
(13)
Remove nut (1), lockwasher (2), bolt (6),
and spacer (4) from sheave guards (3 and 5).
AGO 20051A
6-2
