CAUSES AND SOLUTIONS:

• Backing vacuum pump achieves low vacuum level (required minimum 30-40 torr) – Check vacuum level.
• check cooling water circulation at Drive & Non-Drive end.
• If clearance increases between lobe to end plate – check & Adjust the clearance.

CAUSES AND SOLUTIONS:

• Poor/low oil lubrication – Check and maintain oil level.
• Bearing not replaced as per periodically running standard hours – Replace the bearing after standard bearing running hours.

CAUSES AND SOLUTIONS:

• Bearing failure – Check and replace the bearing.
• Gear backlash – Check and replace the gear set.
• Disturbance in lobe clearance – Check and adjust the clearance with timing gear.

CAUSES AND SOLUTIONS:

• Pump is stuck/no free movement – Free the lobe & check.
• Incorrect VFD parameter setting – Check and correct the settings.

SOLUTION:

• EPSPL recommended synthetic vacuum oil (E100)

CAUSES AND SOLUTIONS:

• Drive end mechanical/oil seal failure – check & replace the seal.

SOLUTION:

• Driven anti-clockwise from motor side/check direction arrow.