SUB-SECTION 6D
SWING TRANSMISSION
4. Check that the planet gears run freely in the primary end
B. Remove shafts (8) and planet gears (3). Remove
final planet assemblies if these assemblies have not been
bronze washer (11) from primary planetary carrier
disassembled. If these assemblies have been disassembled,
(9).
check the following:
4. Invert the assembly and remove capscrews (51) and lock-
A. Inspect the planet pin bores in planet carriers (9 and
washers (52). Remove bearing carrier (28) from housing
27) for scores or bruises which may have been caused
(53). Remove and discard O-ring (25).
during the removal of the planet pins. Remove the
high spots of any scores or bruises sufficiently to al-
5. Remove capscrews (45) and lockwashers (46). Then
low a planet pin to be pressed into each bore by
remove seal carrier (30). Remove and discard oil seal (32)
hand.
and O-ring (29). If it is necessary to disassemble the bearing
carrier, proceed as follows:
B. Inspect the planet pins for excessive wear at the
bearing area.
A. Drive roll pins (40) out with a suitable pin punch.
C. Check planet gears (3 and 50) for excessive wear and
B. Remove locknut (41), seal journal (42), and large
damage to the gear teeth. If wear is excessive or teeth
bearing cone (43).
are damaged, replace the planet gear.
C. Remove output shaft (36). Remove small bearing
5. Inspect the ring gears in housing (53) for excessive wear
cone (33) from the output shaft only if replacement
or damage to the teeth. If wear is excessive or teeth are
is required.
damaged, replace housing (53).
D. Remove bearing cups (31 and 44) from bearing car-
REASSEMBLY. To reassemble the swing reducer, proceed
rier only if they are to be replaced.
as follows (see Figure 6D-3):
6. Lift final planetary assembly (26) from housing (53). If
1. Place housing (53) on a workbench with the brake end
it is necessary to disassemble the final planetary assembly,
down. Install final planetary assembly (26), with bronze
proceed as follows:
washer (35) up, in housing (53).
A. Remove setscrews (49), and press shaft (47) out to
If the final planetary assembly has been disassembled,
remove planet gears (50). Press bearing (48) out only
assemble it as described below, and then install it as just
if they require replacement.
described.
B. Remove bronze spacer (35).
A. Press one roller bearing (48) into each planet gear
INSPECTION. After the swing reducer or my subassembly
(50).
of the swing reducer has been disassembled, inspect the
B. Place bronze washer (35) in the center of planet car-
components as described below:
rier (26).
1. Wash all parts in a suitable cleaning solvent, and dry
C. lnstall planet gears (50) in planet carrier (26). Insert
thoroughly with compressed air or clean cloths.
shafts (47) through the planet carrier and gears so
that the groove in the end of the shaft will be aligned
with the setscrew holes.
Do not dry any complete subassemblies with com-
D. lnstall setscrews (49).
pressed air, as this may drive particles of dirt into the
subassembly.
2. Lubricate O-ring (25) with a small amount of clean
2. Discard all O-rings and oil seals that were removed
grease.
during disassembly.
3. Place bearing carrier assembly (28) over housing (53),
3. Check that all snap rings form a true circle, and check all
and rotate output shaft (36) until the output shaft splines
lockwashers for flatness. lf these items are bent or dam-
engage the internal splines of planet carrier (26). lnstall
aged, replace the damaged items.
capscrews (51) and lockwashers (52).
6D-4
