CAMCORP Blower Package with Roots Blower - Manual (Page 29)

6 For your nearest ROOTS Office, dial our Customer Service Hot Line 1 877 363 ROOTS (7668).
LUBRICATION: For Units with a Grease Lubricated
Drive End
A simple but very effective lubrication system is
employed on the drive shaft end bearings. Hydraulic
pressure relief fittings are provided to vent any excess
grease, preventing pressure build-up on the seals.
A restriction plug and metering orifice prevent loss of
lubricant from initial surges in lubricant pressure but
permit venting excess lubricant under steadily rising
pressures.
When servicing drive end bearings, use a NLGI #2
premium grade grease with 300°F (149°C) service
temperature and moisture resistance and good
mechanical stability. Using a pressure gun, slowly
force new lubricant into each drive end bearing
housing until traces of clean grease comes out of
the relief fitting.
After a long shutdown, it is recommended that the
grease fittings be removed, the old grease flushed out
with kerosene or #10 lubricating oil, drained thoroughly,
and bearings refilled with new grease. Be sure grease
relief fittings are reinstalled. Grease should be added
using a hand operated grease gun to the drive end
bearings at varying time intervals depending on duty
cycle and RPM. Table 4 has been prepared as a
general greasing schedule guide based on average
operating conditions. More frequent intervals may be
necessary depending on the grease operating
temperature and unusual circumstances. ROOTS
™
synthetic grease (ROOTS P/N T20019-) is highly
recommended.
LUBRICATION: For Units with Splash Lubrication
on Both Ends
Bearings and oil seals are lubricated by the action of
the timing gears or oil slingers which dip into the main
oil sumps causing oil to splash directly on gears and
into bearings and seals. A drain port is provided below
each bearing to prevent an excessive amount of oil in
the bearings. Seals located inboard of the bearings in
each headplate effectively retain oil within the sumps.
Any small leakage that may occur should the seals
wear passes into a cavity in each vented headplate
and is drained downward.
L
UBRICATION
Oil sumps on each end of the blower are filled by
removing top vent plugs, Item (21), and filling until oil
reaches the middle of the oil level sight gauge, Item
(37), or the overflow plug.
Initial filling of the sumps should be accomplished with
the blower not operating, in order to obtain the correct
oil level. Approximate oil quantities required for blowers
of the various models and configurations are listed in
Table 3. Use a good grade of industrial type non-deter-
gent, rust inhibiting, anti-foaming oil and of correct
viscosity per Table 2. ROOTS
™ synthetic oil (ROOTS
P/N 813-106-) is highly recommended.
The oil level should not fall below the middle of the
site gauge when the blower is idle. It may rise
on the gauge during operation, to an extent depending
somewhat on oil temperature and blower speed.
Proper lubrication is usually the most important single
consideration in obtaining maximum service life and
satisfactory operation from the unit. Unless operating
conditions are quite severe, a weekly check of oil level
and necessary addition of lubricant should be suffi-
cient. During the first week of operation, check the oil
levels in the oil sumps about once a day, and watch
for leaks. Replenish as necessary. Thereafter, an
occasional check should be sufficient. It is recommended
that the oil be changed after initial 100 hours of opera-
tion. Frequent oil changing is not necessary unless the-
blower is operated in a very dusty location. Normal life
expectancy of petroleum based oils is about 2000
hours with an oil temperature of about 200°F (93°C).
As the oil temperature increases by increments of
15-18°F (8°C - 10°C), the life is reduced by half.
Example: Oil temperatures of 230-236°F (110°C -
113°C) will produce life expectancy of 1/4 or 500 hours.
Therefore, it is considered normal to have oil change
periods of 500 hours with petroleum based oils.