Drive Belts, Pulleys And Hubs - Prochem BLAZER PLUS Operating Instructions Manual

MAINTENANCE
DRIVE BELTS, PULLEYS, & HUBS
1. Check pulley set screws and/or hub cap screws after
the first 25 hours and then again at 100 hours.
Re-torque these screws with a torque wrench, using
the values on the following chart. Check pulley set
screws and/or hub cap screws every 500 hours
thereafter.
Make certain that when you re-torque these screws,
that you use a clockwise pattern and continue until
proper torque is achieved.
TORQUE VALUES
COMPONENT
Engine hub
Vacuum pump hub
2. Check for pulley groove wear, clean belts and pulley
grooves, check for worn belts, proper belt tension,
and pulley alignment after the first 25 hours and
then again at 100 hours.
Check for belt ride in the groove. In multiple groove
drives, belt ride should be uniform, not more than
1/16" above or below top of pulley groove.
Check groove wear area for wear. Side wall of
groove should be straight, not dished out. Bottom of
groove should show no signs of belt contact.
Inspect belts for contaminates, such as oil or grease.
Wipe belts clean with detergent and water. Inspect
pulley grooves for buildup of such material and
remove, if necessary.
Check wear surfaces of belt for excessive wear. If
they have a slick, glazed look, belts are slipping.
Check belt tension. Never replace one belt in a used
set, as used belts will elongate. Replace entire set if
replacement is necessary.
4-5
INCH/LBS FOOT/LBS
264 22
192 16
BLAZER 980073 09/16/02
Place a straight-edge across the top of belt.
There should be no more than 1/2"
deflection in the center of the belt, halfway
between the pulleys. If there is too much
slack, tighten belt, making sure that it stays
properly aligned.
See the "General Service Adjustments"
section in this manual for details.
Check alignment with straight-edge, string,
or machinist level. Correct alignment to as
near perfect as possible.
FLOAT VALVE (WATER BOX)
Check the float valve at least once a month for
proper operation. If overfilling is a problem,
check the plunger for a proper seat. Replace tip
on plunger if needed or damaged. Water level in
the water box should be about 6-1/2".
For the procedure, see the "General Service
Adjustments" section in this manual for
details.
INLET FILTER (TO WATER PUMP)
The filter inside and on the bottom of the water
box is rubber with a stainless steel screen. This
should be inspected and cleaned on a weekly
basis. Replace, if damaged.
NOTE: Vacuum all excess water and debris
from water box prior to removing strainer.