TERMINAL-SOLDER 3T8371 - Caterpillar

3412C Engine
The engine is a Caterpillar 3412C that is equipped with the following features:
Two single-stage, dry air cleaners with service indicators
A stainless steel muffler, flexible exhaust fitting assembly and rain cap
Air inlet shutoff
12 Volt 60 Amp Alternator
Fuel/water separators with rock guards on bottom bowlsTruck Chassis and Truck Engine
Refer to the "OEM Service Manual" for additional information.Transmission
Refer to the "OEM Service Manual" for additional information.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's crankshaft and the triplex pump's 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 190 L (50 US gal) oil reservoir is located under the triplex pump's drive shaft in the center of the truck's frame rails. 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 triplex 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
Carbon steel catch tankThe carbon steel 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 triplex pump pistons. Oil drains into a carbon steel catch tank that is located at the right rear of the truck. The carbon steel 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 SPT342 Truck Mounted Pumper is equipped with a flow stabilizer in order 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 properly charged and maintained. The internal cartridge must be charged with nitrogen to 206 kPa (30 psi).Hydraulic Starting System
The hydraulic starting system consists of a hydraulic starting motor that is driven by a hydraulic pump. The hydraulic pump is driven by the tractor transmission's power take-off. A solenoid valve is used to direct oil to the hydraulic starting