Manaras Opera Opera-GH Installation And Instruction Manual page 16

HOW TO PLACE THE BREATHER IN THE AIR VENT HOLE:
The Breather consists of a Metal Elbow and a Screw-in Plastic Cap with a yellow plug.
The Breather on the reducer should be installed once the gear head operator is mounted. Install the breather
referring to the drawing shown (remove the metal bolt from the air vent hole):

If the air-vent hole is leaning at 60° or more, only the screw-in plastic cap must be used on the air-vent.

If the air-vent hole is leaning at less than 60°, the metal elbow and plastic cap must be used. Using only
the plastic cap will result in risk of oil leakage since the reducer is almost half full.
NOTE: Once the breather is installed, the yellow plug must be removed from the plastic cap to allow
free ventilation of the reducer.
MAINTENANCE:
The oil level in the reducer should be checked at least once a month. False readings can be avoided by
examining the oil on stationary reducer. Remove the breather and with the help of a long screwdriver or a
metal rod, check the oil level by inserting it inside the reducer. Under normal conditions, the oil level must be
near the middle of the drive shaft level. Never mix two different types of oil. If uncertain, change lubricant.
CHANGING LUBRICANT:
After 100 hours of running, a new reducer should be drained, flushed and refilled with proper oil. Thereafter,
oil should be changed at least every 2500 operating hours. Never mix two different types of oil. Be sure to
drain and wash before using another type of oil.
SELECTION OF LUBRICANT:
Lubricating oil must have a viscosity to reduce friction and allow the speed reducer to operate smoothly under
high load and impact. Consult the table below to select the proper lubricant (see table below).
Our gear reducers are normally filled up with oil of S.A.E. (Society of Automobile Engineers) grade 80W90,
where a wide temperature range is expected.
These kinds of lubricants permit extended life between drains. This is due to their increased resistance to
thermal degradation or oxidation.
LUBRICANT TABLE
Operator
HP
Model
OGH 1/2, 3/4, 1
OGH 1 1/2, 2
16
Frame
Ratio
Size
45:1 56C
MINERAL ISO 150 or SAE
44:1 56C
Oil to be used
80W90
Qty (ml)
410
700