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ZLYJ EXTRUDER GEARBOX MANUAL CHAPTER THREE

VII. Fault Analysis and Solutions

Faults

Causes

Solutions

 

Faults

Causes

Solutions

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

Abnormal and    non-regular  operational noise

Impurity of lubricating oil

Check the lubricating oil, stop operation and contact Guomao

Abnormal noise in fixed parts of reducer

Fastener of reducer looses

Check the fasteners and use the those specified

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

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 V2.5m/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

 
 

 is not recommended for reducer. Contact us if required.

See Annex-Lubricating Oil Comparison Table for domestic and foreign lubricating oil products.