Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument
Situational Awareness; Troubleshooting
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy
General None Reported / Taken
Aircraft
The pilot monitoring preflight procedure was completed by myself and preflight checklist was completed as normal.  During initial climb we noticed that the landing gear took longer to retract than normal but then retracted with no abnormal indications.  On approach in ZZZ the landing gear handle was selected down and we both noticed that the main gear dropped but the nose gear was taking longer than normal.  Shortly after this the 'gear disagree' warning message and aural alert displayed.  This lasted for just a few seconds before the nose gear dropped and the 3 green landing gear indicators were displayed.  A normal landing was completed in ZZZ without any issue.  Upon the shutdown flow by the First Officer he noticed that the hydraulic pump 3A switch was in the off position.  Upon further investigation we noticed the 3A switch was very loose and could easily flip from the on to off position without any much pressure from us.  We contacted maintenance to let them know of the slow gear retract and extension and the loose hydraulic pump 3A switch.We believe the 3A hydraulic pump switch may have worked its way into the off position during taxi for takeoff or during the takeoff roll due to high vibration.
Flight Crew flying CRJ-200 experienced problems with gear retraction and extension.