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S. No. Observation Action
1. Loose flange at inlet/outlet of Blower. Tighten the joints
2. Improper opening of non-return valve Correct the valve position as per flow direction
3. Low level of gear oil Fill the oil to correct (red mark) level.
4. Higher of gear oil Adjust the specified R.P.M. of the blower
5. Filter choking Clean/change the filter
S. No. Observation Action
1. The filter is dirty and choked Clean/change the filter.
2. Discharge pressure too high :
a) Direction/operation of NRV not proper
OR
b) Operation of gate valve not proper
OR
c) Operation of safety valve not proper		 ­ Correct the valve position as per flow Direction or change the NRV
­ Rectify/change the gate valve/delivery gate
­ Clean the male & female parts of Safety valve or change the valve
3. Oil level too low/high or oil chamber is dry Fill the oil chamber to correct level.
4. Viscosity of oil is high. Fill the specified grade of oil.
5. Bearings at pulley side are dry Grease the bearings or fill correct oil (For both side oil lubricating Blower).
6. Deposits on the lobes/inner walls of casing.
(For checking this open the inlet/outlet flange of the blower)		 Clean the blower with Kerosene/Diesel.
S. No. Observation Action
1. Bypass valve is open Close/adjust the bypass valve.
2. Leakage in down line/delivery line Stop the leakage.
3. Filter is dirty & choked Clean/change the filter.
4. RPM of Blower is too low Correct the RPM of blower to specified limit
5. Belts are loose Tighten the belts.
S. No. Observation Action
1. Filter is dirty/choked Clean/change the filter
2. Bypass valve is opened Close/adjust the bypass valve
3. Leakage in down line/delivery line Stop the leakage
4. Low RPM of Blower Correct the RPM
5. Belts are loose Tighten the belts
S. No. Observation Action
1. Filter is dirty/chocked Clean/change the filter
2. Pressure at delivery is high
a) Safety valve is faulty
b) NRV is not functioning		 Correct the safety valve Change the NRV
3. Deposits on the lobes/inner wall of casing. (for checking this open the inlet/outlet flange of the Blower Clean the blower with Kerosene/Diesel.
S. No. Observation Action
1. Deposits on the lobes or inner wall of the casing Clean the blower with Kerosene/Diesel.
2. Electric Motor is faulty (To check this remove the belts, isolate the Blower from motor and run the motor.) Change the motor.
S. No. Observation Action
1. Oil leaks from the breather plug Cause : Oil level too high. Fill the oil to marked level.
2. Oil leaks through the drain plug Cause:
a) Loose fitting of plug
b) Rubber seal damaged		 Tight the plug properly Change the seal
3. Oil leakage from vent hole of the blower in gear and pulley side. Call our nearest Sales Office
4. Oil leakage in delivery line Call our nearest Sales Office

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