CRAWLER COMPONENTS
SUBSECTION 9E
spacer (218T1178) in place of bearing (14). If the assembly
7 . Drive or press shaft (17) out of the sprocket toward the
spacer is not available, one can be fabricated as shown in
inboard side of the side frame. Bearing (02). carrier (03),
Figure 9E-5. Carrier (12) must be installed wrth break edge
spacer (05) and seal (06) wiII come out with the shaft.
lips up.
8. Pull carrier (12), bearing (14), shims (10 and 11), spacer
7. Install end plate (18), capscrews (01 and 19). retainer
(09). and seal (08) out. Remove the bearing frorn the car-
(15), and capscrews (16). Torque capscrews (01) to 230 ft-
rier.
Ibs.
NOTE
8. Check gap "A" first. This gap must measure 0.106 to
Keep the shim sets intact as the same shim sets are
0.126 inch. Add shims (10) to increase the gap, remove
used for assembly.
shims (10) to decrease the gap.
9. Remove the sprocket from the side frame.
NOTE
CLEANING AND INSPECTION Clean and inspect all com-
Gaps "A" and "B" provide the correct pressure on
ponents as follows:
seals (06 and 08). Incorrect gaps could cause oil leak-
1 . Clean all parts in solvent and dry with compressed air.
age or excessive seal wear.
Do not spin the bearings with compressed air.
9. With the correct amount of shims (10) installed and the
assembly spacer, end cap, carrier, shims and retainer in
2. Inspect the bearings for pitted or spalled areas. Replace
place, measure the gap at point "B". This gap must mea-
the bearings if necessary.
sure 0.106 to 0.126 inch also. If the gap is incorrect, add
3. Check all parts for cracks, breaks or unusual wear.
shims (11) to increase the gap, or remove shims (11) to de-
4. Replace both seals and O-rings.
crease the gap.
5. Check the oil grooves inside the hub of the sprocket. The
10. After gap "B" is attained, remove the assembly spacer.
grooves must be open to allow the free flow of oil to the out-
Install seal (08), shims (11), and carrier (12). Do not change
board bearing.
the position of carrier (12).
ASSEMBLY AND INSTALLATION To assemble and install
11. Install bearing (14) tight against shims (10). Secure the
the drive sprocket assembly, proceed as follows (see Figure
bearing in place with end plate (18) and capscrews (19)
9E-4):
torqued to 130 ft-lbs.
1. Support sprocket (07) between the side frames
12. Install lubricated O-ring (13) into carrier (12). Place re-
tainer (15) in position and secure the entire assembly with
2. Heat bearing (02) to 300F and press it up against the
capscrews (16) torqued to 330 ft-lbs.
shoulder on shaft (17).
13. Remove level plug (20) and fill the driveshaft through
3. Install carrier (03) into the side frame with the break
the filler hole with the lubricant specified in Section Ill.
edge lip up.
When the lubricant begins to run out of the level hole, in-
4. Install the bearing and shaft assembly into carrier (03).
stall the level plug.
Slide spacer (05) and seal (06) over the shaft. When in-
14. Install the propel gear case and fill with the lubricant
stalling seals (06 and 08) use the following procedure:
specified in Section III.
A Be sure the sprocket and other seal bores are absolutely
15. Remove the blocking and jacks from the sprocket and
clean prior to seal installation by cleaning with solvent
carbody.
and drying with compressed air.
16. Install the track as described earlier in this subsection.
B. Wipe the lapped faces of the metal sealing rings clean.
C. Snug the bellville washer of each seal half up against
SIDE FRAMES AND AXLES (2100J949)
the seal ring flange shoulder around the full circumfer-
ence of the washer. (See insert in Figure 9E-4.)
SIDE FRAME REMOVAL. To remove a side frame, proceed
as follows (see Figure 9E-6 and 9E-7):
D. Insert each seal half into the seal receiving bore.
1. Choose firm, level ground or a level "lowboy" platform
E. Again wipe the lapped sealing ring faces clean, then, ap-
on which to work. Install the basic boom on the machine.
ply a light film of oil to one of the sealing ring lapped
Remove the counterweight (see the Operator's Manual).
faces.
F. For much of the assembly the seal is visible. Any
popping out of the seal so that the retainer barb loses
contact with the bore wall will require backing up and
starting over.
The weight of the block and sling must equal
5. Place lubricated O-ring (04) in the carrier groove and
1500 Ibs. to prevent backward tipping with one
start the shaft into the sprocket.
side frame removed and one side frame in-
6. As the shaft comes through the sprocket, add spacer
stalled. Proceed slowly and exercise caution
(09), shim sets (10 and 11), carrier (12), and assembly
throughout this procedure.
9E-4
