5 steps
1. Confirm positve gear lock lever in proper position, non erect and not locked.
2. Lower gear hyd porting valve lever to the down position, observe hyd pressure on landing gear hyd panel, watch for bump.
3. Push in landing gear down lock indicator light (spring loaded push button thing on the gear hyd porting valve selector thing), observe green light on insturment panel indicating gear is down, but not locked.
4. Move gear hyd porting valve lever to the neautral position, observe green light on insturment panel is illiuminated.
5. Manually place landing gear poistive lock lever into the locked poisiton and place the positive lock lever keeper in the overcenter hold position.
The gear is now down and you can read the checklist.
This was so much better than the DC-2 where you actually had to manually pump the gear up and down, the DC-3 was a modern airplane for co-pilots back then.