Crane & Hoist Gearbox Inspection Guide: Gears, Bearings, Lubrication and Backlash

Understand how gearbox noise, oil leakage, temperature, backlash and vibration are assessed as part of planned crane and hoist maintenance.

What symptoms can a gearbox show?

Changes in operating noise, impact, oil leakage, abnormal temperature, vibration and increasing mechanical play are assessed together. Component decisions should also consider load, duty cycle and service history.

• Operating noise
• Oil level and leakage
• Temperature and vibration
• Mechanical play

How is inspection depth defined?

A review can start with the housing and mountings, then extend to lubricant condition, shaft and bearing behaviour, gear contact patterns and the connected brake-motor group. The required depth depends on age, duty and observed symptoms.

• Housing and mountings
• Lubrication and sealing
• Shaft-bearing behaviour
• Gear contact and wear