6-4
6.3.2. Oil bath type bearing
(1) Since the oil is contaminated rapidly during
the first six months from the start of
operation, replace the entire volume of the
oil.
(2) Change the oil after the first 300 hours
operation, and every 2000 hours thereafter.
(3) Cosmo ALLpus 32 of Cosmo Oil is used.
Select the equivalent oil if you use oils from
other brands.
(4) Be careful that dust or foreign matters should
not mix with oil when you change the oil.
(5) The volume of oil is as shown in the table.
Be careful not to overfill the oil bath.
Amount of oil for the oil bath type bearing
Shaft
diameter
(mm)
Amount
of oil (ℓ)
Shaft
diameter
(mm)
Amount
of oil (ℓ)
40 1.5 65 2.3
50 2.3 80 3.3
55 1.7
6.3.3. Refill of grease in spring coupling
(1) The spring and the gear coupling are combined in the grease filled in the clearance between the
tooth flanks. A large centrifugal force acts on the grease inside the coupling and causes the
grease to decompose and deteriorate.
Refill and change the grease periodically.
(2) Use the grease Cosmo Dynamax Super No.3 of Cosmo Oil or equivalent.
(3) Refill or change the grease once a year as a general guide.
6.3.4. Consumables
Caution
Part replacement and repairs should only be performed by specialist
companies or service centers designated by the manufacturer.
Improper procedures may lead to malfunctions or accidents.
Refer to the table below for intervals to replace consumables.
Consumable
Condition of replacement
(as a guide)
Cycle to replace (as a
guide)
Bearing Abnormal noise Once every 2 to 3 years
Gland packing Deterioration or wear Once a year
Coupling rubber Deterioration or wear Once a year
V-belt Deterioration or wear Once every 1 to 2 years
There are slight differences in length even if V-belts are the same size.
Use a set of V-belt for a single unit of the fan.
Do not use a combination of any parts of new and old belts.
Oil plug
Oil gauge
Cooling
water
ort
Drain port
Oil
Bearing