6.1 Maintenance schedule

This schedule mentioned below is minimum required & generally based on previous experience. However maintenance intervals and the activities mentioned may change depending on actual site conditions in Shovel vehicle.

Code Interval code Operating hours Time period Activity

VI Check 500 h 1.5 months • Visually check the DCC for dust, dirt, any physical damages EI Interval 1 1000 h 2...3 months • Visually check the heat exchanger for pollution, if required, clean. • Read-out the fault memory of the DCU I2 Interval 2 2000h 6 months • Check and clean insulators of PTB2 terminals & motor connection terminals on DCC for dirt accumulation.

• Clean the heat sink fins of air conditioner from outer side of DCC

I3 Interval 3 4000 h 1 year • Cooling system: Check the liquid level, if required, top up • Cooling system: Cooling medium specimen, analysis. • Check that the seals of cooling system are not leaking • Check the coolant pump: For vibration, noise in operation, damage and leaks • Apply grease (jelly) on door gaskets to prevent adhesion/ sticking of gasket to cabinet • Check air conditioner fans

I4 Interval 4 8000 h 2 years • DC link capacitor: Check the capacitance value • Check the Blower for heat exchanger. • Check DCU fans

2 x I4 16000 h 4 years • Bearings of main fan motor: Replace in qualified workshop • Electric motor of internal cooler (E11): Replace and overhaul in qualified workshop • Replace the gaskets on maintenance cover

Siemens Ltd. A5E01511750J/ 4M-2601-1645240 AC Shovel 295HD/ HR DCC Operation & Maintenance Manual 74