6-4
“Oil-Less” Scroll Laboratory Air
4107 9006 25.11
6.0 Inspection/Replacement Procedures
Never perform any maintenance functions
while the unit is in operation.
Keep grease clean. Mixing dissimilar grease
is not recommended.
1. Relubrication with the shaft stationary and
a warm motor is recommended (at less than
80°C).
2. Remove all dirt and wipe clean the the grease
fi ttings and drains.
3. Apply grease gun to fi tting. Too much grease
or injecting grease too quickly can cause
premature bearing failure. Slowly apply the
recommended amount of grease, taking 1
minute or so to apply (See Table 6-3).
6.4 Liquid Level Sight Glass
The sight glass is located lower than the receiver
tank and it will show approximately 1/2 full when
the receiver is empty. This is a normal condition.
See Figure 6.4.
Figure 6.4 Sight Glass
6.3 Motor Lubrication
6.3.1 Lubrication Information
This a ball or roller bearing motor. The bearings
have been lubricated at the factory. Motors are
pregreased. New motors that have been stored
for a year or more should be relubricated.
Table 6-3 Motor Lubrication Information
Hp
Weight of Grease
per Bearing,
Ounce (Grams
Total
Grease
Weight
Volume
of
Grease
(in3)
Interval
(Hours)
2
.3 (8.4)
0.6
0.6
Yearly
3
.3 (8.4)
0.6
0.6
Yearly
5
.3 (8.4)
0.6
0.6
Yearly
7.5
.3 (8.4)
0.6
0.6
Yearly
10
.61 (17.4)
1.2
1.22
Yearly
15
.61 (17.4)
1.2
1.22
Yearly
Note: Exxon Mobile Polyrex or equivalent grease
to be used.
6.3.2 Lubrication Procedure
WARNING:
Before starting any maintenance
procedures, disconnect all power to the
package.
WARNING:
Surface temperatures of motor enclosures
may reach temperatures which can cause
discomfort or injury. Protection should be
used to protect against accidental contact
with hot surfaces. Failure to observe this
precaution could result in bodily injury.
