INTERMEDIATE SWING SHAFTS
SUBSECTION 6C
4. If inspection reveals nicks, mars or burrs on machined or
bevel gear tooth, preferably with a 0.001 inch dial indica-
ground surfaces, use a fine mill file or stone for removal. Be
tor, while the mating bevel gear is held in a locked position.
sure all threaded items are clean and that threads are not
8. If backlash adjustment is required, proceed as follows:
damaged.
A. Remove the hardware holding the swivel to the bracket
on one side only. Move the swivel to one side and block it
ASSEMBLY AND INSTALLATION. To assemble and install
in place.
the intermediate swing shaft, proceed as follows (see Fig-
ure 6C-1):
Drain the intermediate swing shaft bore by removing the
8.
pipe plug in the spacer retainer. Remove the tie wire, the
1. Press the cone of the top bearing on the shaft until it is
capscrews and the spacer retainer. Be ready to catch
snug against the shoulder. Pack the bearing with grease
any additional gear oil trapped in the chain case bore.
and install the outer race. Install the top spacer against the
top bearing.
Add or remove shims between the bottom spacer and
C.
spacer retainer to bring the bevel gears into proper con-
2. Install the outer race of the bottom bearing against the
tact with the required backlash.
top spacer. Pack the cone of the bottom bearing with grease
and press the bearing on the shaft until it is seated with the
NOTE
outer race. Turn the outer races to be sure the bearings
The measured backlash, at each bevel gear set,
have seated properly and turn freely.
should equal the sum of the backlash values stamped
on the bevel gear and the mating bevel pinion. Back-
3. Install the cover plate to the end of the shaft with the cap-
lash can be corrected by adding or removing the back-
screws. Bench set the bearing end play by rotating the shaft
lash shims. Adding shims will drop the intermediate
while adjusting the bearings. Tighten the cover plate cap-
swing shaft down, thereby increasing backlash. Re-
screws with the shaft rotating freely and no appreciable end
moving shims will move the shaft up and decrease
play. Secure the cover plate capscrews with the tie wire.
backlash. When checking bevel gear contact, use only
three capscrews to hold the spacer retainer in place.
4. Install the shaft assembly into the chain case bore.
D. When proper backlash has been set, install the other
5. Install the bearing spacer, the pinion, and the bevel gear.
capscrews and secure them with the tie wire.
6. Attach the end plate with the capscrews and secure with
E. Center the swivel and secure it in placewith the mount-
the tie wire.
ing hardware.
7. Install the swing shafts as described in Subsection 6B
9. Install the chain case covers and any other sheet metal
and check the bevel gear contact as described and illus-
removed during disassembly.
trated. Each swing shaft bevel gear and intermediate bevel
10. Fill the chain case with the gear oil specified in Section
gear has a backlash dimension stamped on its face. Back-
Ill.
lash measurements must be taken at the pitch diameter of a
6C-2