B737-800
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Flight Crew Total 4500
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Weight And Balance; Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor
Air Traffic Control Provided Assistance; Flight Crew Landed in Emergency Condition; Flight Crew Overcame Equipment Problem; Flight Crew Returned To Departure Airport; Flight Crew Requested ATC Assistance / Clarification; General Maintenance Action
Aircraft
On climbout; passing approximately 16;000 [feet] MSL; I smelled an acrid; burning odor and saw the MASTER CAUTION and the B Electric Hydraulic Pump 1 Overheat lights illuminate. The Captain and I put on our oxygen masks and began working the problem. The Captain flew and talked on the radios while I ran the appropriate checklist. The Captain [advised ATC]; we returned to [departure airport] and landed uneventfully overweight. ARFF met us after taxiing off the runway and cleared us to taxi to the gate. No damage was noted.
B737-800 First Officer reported returning to departure airport after noting burning odor caused by hydraulic pump overheat.