The Atlas Copco DM30 II is a crawler mounted, hydraulic tophead drive, multi pass rotary drilling rig featuring a 30 ft (9.1 m) drill pipe change and a standard 4-rod carousel. With a starter rod under the rotary head, the DM30 II has a total depth capacity of 146 ft (44.5 m).
[pdf] Check hydraulic oil on sight level gauge on hydraulic tank, pumps would be making noise if oil level is low. Make sure all hoses are connected properly and not damaged. Check couplings and make sure they are plugged in properly.
[pdf] If the capacity of the air compressor is really too low, check the following: Check differential pressure over oil separator. Replace separator when necessary. Check and replace compressed air filters (if installed). Compressor does not unload. Check if pressure switch is correctly set and working.
[pdf] 
