Pump is used before these nouns:
shotgun

Pump is used after these nouns:
bicycle, fuel, gasoline, hand, irrigation, penis, petrol, stomach, water

Pump is used with these nouns as the subject:
adrenalin, heart, leg, music

Pump is used with these nouns as the object:
blood, fist, gasoline, muscle, oil, sewage, stomach, tyre, water