Section VI - Servicing
V-belt Drive Maintenance
QGB series compressors are equipped
with an automatic belt-tensioning device
and require no adjustments between belt
replacements.
Warning!
The automatic spring tensioner system
should not need disassembly. If a
component in the automatic spring
tensioner system is damaged and
needs replacement, be sure to relieve
the tension in the spring before doing
so. DO NOT attempt any adjustments
to the automatic spring tensioner
system without first relieving the
tension in the spring. Failure to do
may result in component damage,
system damage, or personal injury.
Belts must be replaced when
automatic belt tensioning indicator pin
(#8) has reached full length of travel
in its adapter groove. The indicator
pin is used as a visual aid to show the
amount the belts have stretched and
give a visual indication to when the
belts need to be replaced. As the
belts stretch, the spring (#3) along with
motor weight, forces the tensioner rod
(#5) down to keep adequate tension in
the belts. As this occurs, the indicator
pin which is pressed into the tensioner rod
will move down in the slot in the clevis
adapter (#2) that is pinned to the clevis
(#).
Caution!
Use caution when working with any
spring assisted mechanism. When
compressed, this spring can release a
significant amount of energy without
warning, causing serious injury.
Belt Maintenance Schedule
E
vERY
100
HOuRS
FOR
THE
FIRST
1000
HOuRS
C
HECK
BELT
CONDITION
AND
POSITION
OF
BELT
TENSIONING
INDICATOR
SPRING
PIN
IN
GROOvE
. R
ECORD
POSITION
OF
INDICATOR
PIN
BOTTOM
FROM
BOTTOM
OF
GROOvE
(
DIMENSION
A).
E
vERY
1000
HOuRS
C
HECK
BELT
CONDITION
AND
POSITION
OF
BELT
TENSIONING
INDICATOR
SPRING
PIN
IN
GROOvE
. R
ECORD
POSITION
OF
INDICATOR
PIN
BOTTOM
FROM
BOTTOM
OF
GROOvE
(
DIMENSION
A).
notiCe!
If at any interval the belts appear to need servicing (show signs of thermal stress or
excessive cracking), there are nicks in the sheave grooves or the indicator pin has
bottomed out in the groove, please contact Quincy Compressor.
A
TOP
CLEvIS
PIN
(#7)
CLEvIS
ADAPTER
(#2)
INDICATOR
PIN
(#8)
SPRING
NuT
(#9)
jAM
NuT
(#10)
BOTTOM
CLEvIS
PIN
(#12)
TOP
HITCH
PIN
(#6)
CLEvIS
(#1)
SPRING
(#3)
SPRING
wASHER
(#4)
TENSIONER
ROD
(#5)
MOTOR
PLATE
TONGuE
(#11)
BOTTOM
COTTER
PIN
(#13)
Quincy Compressor-QGB
™
39
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