SPF343 and SPF343C Trailer Mounted Pumpers Caterpillar


Product Description

Usage:

SPF343 6RZ
The SPF343 Trailer Mounted Pumper is a pumping unit which is designed for applications that require high horsepower. The pumping unit is mounted to the trailer. The 3512 engine provides the power for the pumping unit. The pump delivers fracturing fluids to the well at a high pressure and at a high rate. The fluid ends for the pumping unit may vary depending on the rate and the pressure requirements for the application. The pumping unit is equipped with a Universal Remote Control Console. The URCC is used to control the pumping unit. The URCC can be used up to a distance of 38 m (125 ft). From this console, gear selection, throttle control, and emergency shutdown are performed.

The SPF343 Trailer Mounted Pumper includes either a Quintuplex or Triplex pump.

3512 Engine

The 3512 Industrial Engine is an electronically controlled diesel engine. The engine is designed for petroleum applications and for auxiliary industrial applications.

The 3512 Industrial Engine is equipped with the Dynamic Gas Blending (DGB) retrofit kit. The DGB kit allows diesel engines to operate on diesel fuel and natural gas simultaneously



Illustration 1g00308167
(A) Inlet valve
(B) Exhaust valve
(C) Flywheel

Table 1
3512 Engine Specifications 
Rated speed (rpm)  1500 to 1950 
Idle speed (rpm)  600 to 900 
Cylinders and arrangement  60 degree Vee 12 
Bore  170 mm (6.7 inch) 
Stroke  190 mm (7.5 inch) 
Type  4-stroke cycle 
Aspiration  Turbocharged 
Displacement per cylinder  4.3 L (263 in3) 
Total displacement  51.8 L (3158 in3) 
Rotation (flywheel end)  Counterclockwise 
Fuel  See this Operation and Maintenance Manual, "Fluid Recommendations" (Maintenance Section). 
Method of starting  Electric starting motor 
Maximum allowable air inlet restriction  6.2 kPa (25 inch of H2O) 

Transmission

Refer to the "OEM Service Manual" for additional information.

Quintuplex or Triplex Pump

Refer to the "OEM Service Manual" for additional information.

Lubrication Systems

Power End Lubrication

The power end lubrication system provides lubrication for the triplex pump crankshaft and the quintuplex pump crossheads. The power end lubrication system is driven by a hydraulic pump that is mounted on the auxiliary drive for the transmission. The power end lubrication system is active when the deck engine is operating. A 227 L (60 US gal) oil reservoir is located under the deck driveline near the center of the trailer. The oil reservoir supplies oil to the hydraulic system. The reservoir should be filled with lubricating oil and the oil reservoir should be kept full. An oil cooler inside the deck radiator cools the lubrication system. A thermostatic valve is located in the hydraulic line immediately after the pump. The thermostatic valve routes oil to the cooler when the oil temperature reaches 60 °C (140 °F).

Fluid End Lubrication

The fluid end lubrication system provides lubrication for the packing for the quintuplex pump. The lubrication system is an air-over-the-top-of-oil type. The system is driven by air pressure. The lubrication reservoir is an ASME coded carbon steel pressure vessel that is registered with the National Board. The lubrication reservoir has a 60.5 L (16 US gal) capacity with 101.6 mm (4 inch) filler cap, a level indicator, and a 19.05 mm (0.75 inch) drain valve.

The lubrication system includes the following components:

  • Solenoid valve

  • Pressure regulator

  • Flow divider valve

  • Flow control valve

  • Check valves

  • Relief valve

  • Liquid filled pressure gauge

  • Polyurethane catch tank

The polyurethane catch tank has a drain valve on the bottom of the tank. The lube system is off when the driveline brake is on. The oil drain is located under the quintuplex pump pistons. Oil drains into a polyurethane catch tank that is located between the rear tires on the curb side of the trailer. The polyurethane catch tank should be drained regularly. For information on the proper lubricant to use, see this Operation and Maintenance Manual, "Plate Locations and Film Locations".

Suction Stabilizer

The SPF343 Trailer Mounted Pumper is equipped with a suction stabilizer to reduce pulsation in the fluid end and the discharge lines. The stabilizer is installed at the forward end of the suction piping. The stabilizer must be charged and maintained. The internal cartridge must be charged with nitrogen to 206 kPa (30 psi).

Hydraulic Starter System

The hydraulic starter system consists of a hydraulic starting motor that is driven by a hydraulic pump. The hydraulic pump is driven by the power take-off for the transmission. A solenoid valve is used to direct oil to the hydraulic starting motor when the engine start switch is engaged.

Cooling Systems

The cooling systems on the SPF343 Trailer Mounted Pumper consist of the following cooling circuits:

  • The transmission oil is cooled by a jacket water heat exchanger that is mounted on the right side of the engine. The torque converter pump for the transmission circulates the transmission oil.

  • The quintuplex pump power end lubrication circuit is cooled by an air-to-oil heat exchanger that is mounted inside the horizontal radiator.

  • The fuel for the deck engine is cooled by a heat exchanger that is mounted inside the horizontal radiator.

  • An air-to-oil heat exchanger that is mounted inside the horizontal radiator cools the hydraulic fan drive circuit.

3512

Air-to-Air Aftercooler (ATAAC) - The inlet air is cooled after the inlet air passes through the turbocharger. The inlet air is passed through an aftercooler (heat exchanger) that uses ambient air for cooling. The inlet air that has been cooled advances to the inlet manifold.

Electrical Controls and Gauge Panel

Electrical Controls

The Universal Remote Control Console (URCC) is used to control the pumping unit. The following functions can be controlled: deck engine, gear selection, throttle control, pump delivery rate, and emergency shutdown.

Store the URCC in the storage box that is located next to the packing lube tank. The legs of the console are stored in a compartment which is located near the fire extinguisher. Visual warning and visual indication lamps are provided for the vital system parameters. This console is portable up to a distance of 38 m (125 ft) from the SPF343 Trailer Mounted Pumper. The URCC is connected to the control system through a 38 m (125 ft) control cable.

The control cable has connectors that plug into the URCC on one end. The other end plugs into the main junction box. The trailer has 24 V battery power for the control system. The batteries are the primary source of power for the control system until the deck engine is running. Once the deck engine is operating, the 75 amp alternator will supply the power for the URCC.

Gauge Panel

The gauge panel is located next to the main junction box. The gauge panel provides gauge readings of temperature and system pressure. Gauges for the deck transmission and the pump have integral electrical switches. The switches will indicate the temperature to the URCC. The switches will also indicate the pressure conditions to the URCC.

Main Junction Box

The main junction box is the junction point for the following components: tractor engine, deck engine, deck transmission, pump controls, and sensors.

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