ZLYJ EXTRUDER GEARBOX MANUAL CHAPTER THREE
VII. Fault Analysis and Solutions
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Faults |
Causes |
Solutions |
Faults |
Causes |
Solutions |
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Abnormal and regular operational noise |
A. Rolling /milling noise: bearing damaged B. Knocking noise: uneven joggling |
A. Check the lubricating oil and replace the bearing B. Contact Guomao |
Leakage of lubricating oil: Junction surface of reducer End cover surface of reducer Cover of sight hole of reducer Sealing point of drive shaft Oil discharge plug Air plug |
Loosening of connecting parts of reducer Loosening of connecting fastener Incorrect installation of sealing parts Damage/abrasion of sealing parts Loose connection Too much oil level of lubricating oil Incorrect installation |
Check the connecting bolts and tighten the loose ones if required Check the sealing part and replace it if required Check oil level/ improve exhaustion Contact Guoma |
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Abnormal and non-regular operational noise |
Impurity of lubricating oil |
Check the lubricating oil, stop operation and contact Guomao |
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Abnormal noise in fixed parts of reducer |
Fastener of reducer looses |
Check the fasteners and use the those specified |
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Too high temperature of operation |
A. To much lubricating oil B. Aging and deterioration of lubricating oil C. Plentiful impurity in lubricating oil D. Damage of lubricating pump E. Fault of cooling system |
A. Check oil level and make modification if required B. Check the replacement time of lubricating oil C. Check the lubricating oil D. Check the lubricating pump and replace it E. Check the cooling system |
Too high temperature on the bearing |
A. Insufficient lubricating oil B. Aging and deterioration of lubricating oil C. Damage of lubricating pump D. Damage of bearing |
A. Check oil level and make modification if required B. Check the replacement time of lubricating oil C. Check the lubricating pump and replace it D Check the bearing and replace it |
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Over-high temperature on sealing point of shaft end in running-in period |
Insufficient cleaning of connection of shaft end during installation Running-in of sealing parts and shaft end |
Clean the shaft end Consider it as normal Contact Guoma |
VIII. Selection of Lubricating Oil
The viscosity of lubricating oil shall be determined in accordance with the peripheral velocity V, working environment or lubricating method of the high-speed gears:
When V≤2.5m/s or ambient temperature is within 35℃~50℃, choose the CKC320 medium-load industrial closed gear oil or CKD320 heavy-load industrial closed gear oil;
When V＞2.5m/s or forced circulating lubrication is applied, choose the CKC220 medium-load industrial closed gear oil or CKD220 heavy-load industrial closed gear oil.
Lubricant
Lubricating grease
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is not recommended for reducer. Contact us if required.
See Annex-Lubricating Oil Comparison Table for domestic and foreign lubricating oil products.
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