Repair manual

Spiders and Gearboxes CRT Repair
wc_tx000583gb.fm 68
6.7 Gearbox Assembly
See Graphic: wc_gr003427
6.7.1 Install two new seals (v) into the gearbox.
6.7.2 Press the outer bearing races into the gearbox and the gearbox cover.
6.7.3 Press the bearings (r, s) onto the input shaft (n).
6.7.4 Oil the bearings on the input shaft and place the input shaft into the
gearbox.
6.7.5 Press the lower bearing (q) onto the output shaft (m).
6.7.6 Press the output gear (o) and the upper bearing (p) onto the output
shaft.
6.7.7 Pack the upper bearing of the output shaft with grease. Oil the lower
bearing of the output shaft.
6.7.8 Insert the output shaft into the gear box.
6.7.9 Install the outer bearing races of the input shaft into the gearbox by
tapping them in with a rubber mallet. Tap them in so that they are flush
with the outside of the gearbox housing.
6.7.10 On the coupling side of the input shaft, install the O-ring (u) and seal
(x) into the cover (v). Then, install the cover and any shims (w) that
were removed to the gearbox with screws. Torque the screws to 25
Nm (18 ft.lbs.).
6.7.11 On the fan side of the input shaft, install the O-ring and seal into the
cover (h). Then, install the cover and any shims that were removed.
Tap each end of the input shaft with a rubber mallet to set the bearings.
Check the shaft for end play. The maximum allowable end play is 0.05
mm (0.002 in.). Add or remove shims as needed. Once set, torque the
screws to 25 Nm (18 ft.lbs.).
6.7.12 Install the O-ring and the pressure relief valve (if it was removed) to the
top cover. Check the shaft for side play. The maximum allowable side
play is 0.05 mm (0.002 in.). Add or remove shims as needed. Once set,
apply Loctite 243 or an equivalent to the screws and torque the screws
to 86 Nm (63 ft.lbs.).
6.7.13 Apply Loctite 545 or an equivalent to the oil drain plug and install the
oil drain plug.
6.7.14 With the gearbox level, fill it with approximately 1.8 liters (62 oz.) of
Glycoyle synthetic gear oil. DO NOT overfill the gearbox with oil. Wipe
the threads of the gearbox and the oil fill plug dry. Apply Loctite 545 or
an equivalent to the fill plug and install it into the gearbox. Torque the
fill plug to 20 Nm (15 ft.lbs.).
6.7.15 For 48-inch models:
• Install the fan (g) with the center screw (f) and washer.
• Install the protective guard (d) with screws (e) and washers.