Abstract: A new system of delivering a liquid such as lubricating oil from a source to a remote delivery point using a reciprocating pneumatic pump that is controlled by compressed gas diversion is presented. The control system is fabricated from air tubes which interconnect between valves. This system forces the piston in a reciprocating manner. The liquid is delivered by means of force induced by the compressed gas pump. A modified spring loaded pressure valve is required in the liquid supply line to assure correct operation of the system. The spring in the pressure valve is modified so that its restorative force is reduced by between about 30% and about 50%, and preferably reduced by about 40% of the force contained by the spring when manufactured.