Repair manual

Spiders and Gearboxes CRT Repair
wc_tx000583gb.fm 66
6.6 Gearbox Disassembly
See Graphic: wc_gr003426
This procedure requires a hammer-type gear puller.
6.6.1 Remove the gearbox from the machine. See section Gearbox
Removal and Installation.
6.6.2 Remove the spider assembly from the gearbox. See section Spider
Removal and Installation.
6.6.3 Remove the drain plug (a) and allow the oil to drain out of the gearbox.
It may be necessary to remove the oil fill plug (b) to facilitate draining.
Open or remove pressure relief valve (c) if needed.
Note: In the interests of environmental protection, place a plastic sheet
and a container under the machine to collect any liquid that drains off.
Dispose of this liquid in accordance with environmental protection
legislation.
6.6.4 For 48-inch models:
• Remove the screws (e) and washers that secure the protective
guard (d) and remove the protective guard from the gearbox.
• Remove the center screw (f) and washer that secure the fan (g)
and remove the fan.
6.6.5 Remove the screws that secure each seal cover (h) to the gearbox and
remove the seal covers. Also remove the shim(s) and the O-ring. Press
the seal from each cover.
6.6.6 Remove the bolts (i) from the top cover (j) and remove the top cover.
Also remove the shim(s) (k) and the O-ring (l).
6.6.7 Remove the output shaft (m) from the gearbox. To do so, rotate the
input shaft (n) while driving out the output shaft with a rubber hammer.
6.6.8 Support the output gear (o) in a press. Press the output shaft from both
the output gear and the upper bearing (p).
6.6.9 Remove the key and press the lower bearing (q) from the output shaft.
6.6.10 Remove the input shaft (n) from the gearbox. To do so, drive it out (in
either direction) of the gearbox with a rubber hammer. The
corresponding outer bearing race will also be driven out in the process.
To remove the opposite-side bearing race, reinsert the shaft and using
the rubber hammer, drive the bearing race out of the gearbox by
striking the input shaft.
6.6.11 Press the bearings (r, s) off the input shaft (n).
6.6.12 Using a hammer-type puller (t), remove the outer bearing race from the
gearbox cover (CT Trowel gearbox cover shown). Use the same
technique to remove the outer bearing race from the gearbox.
6.6.13 Remove the two seals (v) from the gearbox.