Traction Motor Assembly

Audit of following 2 Work Instructions was done today in TM Shop. Report is as follows:-

Motor Assembly ( W 21.301):-

Points noticed:-

• While doing CE end bearing bracket preparation, air blowing/cleaning as per para 3.1.1 and 3.1.2 should be done.
• WI prescribes for various quantities of grease to be filled ( 195 gms, 89 gms, 505 gms etc). There is no method of measuring that quantity exactly.

• Special tool mentioned in para 3.1.4 should be available.

• Molybdenum disulphide being used ( trade name Molygraf) should be checked for expiry date.
• While preparing for PE side bearing bracket same points as mentioned above stand good.
• While doing armature assembly, guide collar (INJ-067) should be  used on CE side.

• Fasteners(M20, M24) being used are of UNK and AEL make. They should be checked for approved source.

• Machine oil as mentioned in para 3.4.4 should be used.

• Method of armature assembly as mentioned in para 3.4.2 of this WI should be followed.

Motor Assembly ( W 21.302 )

Points noticed:-

• Guide collar as mentioned in para 3.1.2 of this WI for inserting armature  should be used.
• Tightening torque 3500 Kg Cm should be given with torque wrenche, but same should be used.
• Para 3.1.7 of this WI should be followed.
• Press board as mentioned in this WI para 3.1.11 should be used.
• 5mm gap as mentioned in para 3.1.12, should be recorded.

• Dial indicator as mentioned in para 3.1.14 should be used. Dial gauge when taken out was found due for calibration. 

• Croocdness of brush holder as mentioned in para 3.1.18 should be measured/recorded.

• Rocker assembly should be tightened with torque wrench.

• Fasteners(M16, M20, M24) being used are of UNK and AEL make. They should be checked for approved source.