TurfMaker Positive Displacement Pump

A TURFMAKER® GEAR PUMPS with steel gears are more precision internally than any other gear pump, providing better pumping power for thick slurries through long hoses.

TURFMAKER® GEAR PUMPS have incredibly hard steel surfaces throughout for much longer life.


Designed and manufactured by the TurfMaker Corporation ® 

1. Two large identical gears turn inside an encasement with an opening on each side of the encasement for the slurry material to enter or discharge from the pump. As the two gears turn to the outside of the case, a vacuum is created on the intake side the pump, creating a suction to draw the slurry material into the pump on the intake side of the pump.
2. The slurry materials drawn into the intake side of the pump are captured between each of the lobes of both gears. As the gears turn to the outside of the case, the materials captured between each of the lobes travel around the outside of the encasement to the discharge side of the pump.
3. As the slurry material from the lobes of both gears reaches the discharge area of the pump, the slurry material is force through the outlet port at significant pressure. The pressure provides the power to pump thick slurry material much like a hydraulic positive displacement pump. The number one cause of clogs in a hydromulch machine is lack of pumping pressure. With a 36 HP diesel engine power, the 3″ x 3″ TurfMaker pump will deliver hydromulch slurry material at 230 gpm @ 200 psi.

NOTES: By reversing the direction of the gears, the pump functions the same in the opposite direction. When pumping hydromulch slurries, reversing the direction of the pump can be very helpful in clearing a clog anywhere in the system.


1. As the impeller turns at high speed, a vacuum is created drawing the slurry material into the vanes of the impeller through the inlet port located at the center of the impeller
2. The slurry material is captured between the vanes of the impeller and slung to the outer rim of the impeller, accelerating the fluid to be discharged at a high velocity.
On a popular hydroseeding machine with tank capacity of approximately 1,200 gallons, the centrifugal pump is powered with a 36 HP diesel engine. The pump is defined as a 4″ x 2″ with the pumping capacity of 170 GPM @ 100 psi.

1. If a clog occurs in the pipes or the hose of the machine, the flow of the slurry material in the pump is stopped. With a stopped up flow, a centrifugal pump goes into a state of cavitation. When cavitation occurs, the impeller of the pump turns almost freely with almost no pumping power delivered to clear a clog.
2. A centrifugal pump only functions in one direction.