Urschel COMITROL 1700, Instruction Manual

Page: 148 / 233

REASSEMBLY
1. Install pulleys and secure with fasteners.
Lubricating shaft with high temperature
anti-seize compound will make future
removal easier.
NOTE: If locking cap screws can be turned
by hand, they should be replaced.
2. Install timing belt. Slide motor into position
for correct tension, see “Adjustments”, and
fasten securely in place.
3. Install belt guard and cover plate.
ADJUSTMENTS
In general, the force of one person pushing
against motor while fasteners are tightened
supplies sufficient tension for correct belt
adjustment.
w
CAUTION: DO NOT overtighten belt by
using a board or other lever. Excessive belt
tension may distort the impeller shaft!
To check for excessive belt tension, measure
clearance between impeller tips and reduction
head at points closest to and furthest from the
motor (.005" thickness gauge for microcut
head, .007" gauge for cutting head), see Figure
80. A tighter clearance at the point furthest
from the motor may indicate excessive belt
tension. Loosen motor fasteners and readjust
tension. Timing belt should be able to slide up
and down slightly on pulleys with finger pres-
sure.
MAINTENANCE
Drive Parts
75
Figure 80 — Checking clearance between impeller and
reduction head