Nordson HORIZON 200, Руководство по эксплуатации продукта

Страница: 82 / 124

Repair
7-16
Part 106913 − 04
E 2018 Nordson Corporation
Sheave Replacement
This procedure covers fan and motor sheave replacement. See Figure 7-6
for the Horizon 400 fan drive mounting dimensions.
WARNING:
Before performing the following procedures, shut off electrical
power at the system electrical panel. Lock and tag the disconnect switch.
Sheave Removal
1. Remove the V-belts as described in the V-Belt Replacement procedure.
NOTE:
The cap screws shipped with the bushing are hardened. Do not
use softer-grade screws to break the bushing loose from the sheave. The
ends of the screws will flatten, preventing you from removing them from the
bushing.
2. See Figure 7-8. Unscrew the three cap screws (1) and remove them
from the unthreaded holes in the bushing (2). Thread the screws
through the threaded holes in the bushing until they bottom out on the
sheave (4) hub.
3. Tighten the screws evenly, a quarter turn at a time, until the bushing
breaks loose from the sheave.
NOTE:
Do not lubricate the sheave, bushing, or motor shaft.
4. Pull the sheave and bushing off the shaft (5). Remove the screws from
the bushing. Inspect the sheave, bushing, and key (3), and replace
them if they are damaged. Clean the parts that will be reused.
Sheave Installation
1. Install the sheave and bushing on the shaft. Line up the unthreaded
holes in the bushing with the threaded holes in the sheave, and the
keyway in the bushing with the keyway in the shaft.
2. Install the key into the keyway.
3. Install the three cap screws through the unthreaded holes in the bushing
and thread them into the sheave.
4. Place a square across the top of the fan and motor sheaves. Slide the
sheave and bushing up the shaft until both sheaves are parallel with
each other and to the dimensions shown in Figure 7-6. If the sheaves
are not parallel, the belts will wear prematurely.