Q3
Describe the procedure for carrying out the rocking test of a deck electrohydraulic crane. Please explain how will you ensure that you get the correct readings and how do you interpret the readings obtained from this test for planning future overhauls of the crane.
(16)
Reference Answer
### 1. Purpose of the Rocking Test The rocking test, also known as the tilt or clearance test, is a critical planned maintenance procedure performed on deck cranes. Its primary purpose is to measure the vertical clearance within the slew bearing (also known as the turntable bearing or slew ring). This clearance is an indicator of the wear on the bearing raceways and rolling elements (balls or rollers). The test allows for the assessment of the slew bearing's condition, enabling proactive maintenance and preventing catastrophic failure. ### 2. Pre-Test Preparations and Safety Precautions Before commencing the test, a thorough and systematic preparation is essential for safety and accuracy.
Full answer on MeoMock — surveyor-grade reference answers for 7,000+ written exam questions.