Upright LX31, Service Manual

Page: 43 / 120

LX31/41 Electric Work Platform 3-19
M
AINTENANCE
Section
3.16
Hub Assembly
NOTE: Unless otherwise specified, torque all fit-
tings according to “Table 3-2:” on
page 3-26, and “Table 3-3:” on page 3-26.
1. Oil output shaft and bearing cone. Using cone
press, press bearing cone onto end of output
shaft with retaining ring groove.
2. Stand hub on its small end. Using bearing cup
pressing tool press bearing cup down into hub.
NOTE: Make sure cup sits square with counter-
bore.
3. Turn hub over so it sit on large end. Using bearing
cup pressing tool press bearing cup into small
end of hub.
NOTE: Make sure cup sits square with counter-
bore.
4. Place output shaft into hub so end of shaft with
retaining ring groove points down.
5. Oil output shaft. Using seal pressing tool press
seal into counterbore in small end of hub. The
closed face of the seal should be up.
6. Turn hub over so small end points down. Using
bearing cone pressing tool, press bearing cone
onto output shaft. Rotate hub while pressing
bearing. Stop pressing when hub starts to resist
rotating.
7. Place spacer onto output shaft so it rests on top
of bearing cone. Using retaining ring pliers, place
retaining ring to make sure it is seated.
8. Hit the end of output shaft once or twice with a
soft face hammer. Turn the shaft in both clock-
wise and counter clockwise directions while hit-
ting. This will seat the bearing cone against the
spacer and retaining ring allowing necessary
endplay in the hub-shaft sub-assembly.
9. Turn hub over so it rests on large end. Measure
endplay in hub-shaft sub-assembly. Follow steps
a-c.
a. Mount a dial indicator on hub. Locate the dial
rod on top of output shaft.
b. Lift up on output shaft until the needle on the
dial stops moving.
c. Read the dial. Reading should be no greater
than .008 in.
- If dial reads less than .008 in. (,203 mm) con-
tinue on to step10.
- If dial reads more than .008 in. (,203 mm)
repeat steps 8-15 of "DISASSEMBLY" section.
d. Remove spacer and replace it with thicker
spacer (SK91 068570-011).
e. Repeat steps 6-9 and remeasure end play (Fig-
ure 3-21).
10. Apply a light coat of "Never Seize" to the pipe
plugs and install into pipe plug holes in hub.
NOTE: Leave hole for 90° fitting open.
Figure 3-21: Measuring Hub End Play