The old cargo's had a manual pull stop, so if its stuck tilt the cab or climb imto the o/s/f wheel arch, in the case of a horsebox with fixed cab, locate the stop cable on the pump and push the lever to the run position. Its rare for the pump itself to fail, but possable, if this is the case the pump will need to be removed and repaired or replaced.
DBTS, January 2012
