1N8314 TORQUE SPRING GROUP Caterpillar parts
D346, D379, D398
Rating:
Alternative (cross code) number:
CA1N8314
1N-8314
1N8314
CA1N8314
1N-8314
1N8314
INDUSTRIAL ENGINE,
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High Pressure Stall
Pump and Compensator Operation
(1) Pressure compensator spring. (2) Flow compensator spring. (3) Cavity. (4) Signal line. (5) Flow compensator spool. (6) Actuator piston. (7) Case drain. (8) Bias spring. (9) Swashplate. (10) Passage. (11) Line. (12) Passage. (13) Pressure compensator spool. (14) Pressure compensator cavity. (15) Plug. (16) Check valve. (17) Passage. (18) Passage. (19) Passage. (20) Check valve. (21) Signal line from metering pump. (22) Pressure line to metering pump.When the hydraulic system stalls under load or when the cylinders reach the end of the stroke, the system pressure increases. The signal pressure in line (4) and cavity (3) becomes equal to the pump output pressure. Spring (2) keeps spool (5) shifted down.When system pressure reaches 19 700 kPa (2856 psi) in passage (12), the upward force on pressure compensator spool (13) will compress spring (1), and move pressure compensator spool (13) upward. Supply oil flows through passage (18) and (17) to actuator piston (6). Pressure felt on the actuator piston will destroke the pump. Pump output (flow) decreases while system pressure is limited to 19 700 kPa (2856 psi).Check valve (16) prevents damage to the pump during stall conditions. Check valve (16) allows system pressure oil to bypass the margin spool and flow to actuator piston (6).Metering Pump (Steering)
Metering Pump (Steering)Metering pump is located under the operator station floor plates at the base of the steering column.
Metering Pump
(1) Outlet to tank. (2) Metering Pump inlet check valve. (3) Inlet from pump. (4) Passage. (5) Passage from Gerotor. (6) Drive. (7) Springs. (8) Gerotor. (9) Spool. (10) Pin. (11) Sleeve. (12) Passage to Gerotor. (19) Check valve (internal).The metering pump has two main sections; control section A and pump section B. These two sections work together to send oil to the steering cylinders.The direction and speed of a turn are controlled by the metering pump. As the steering wheel is turned faster, there is an increase in the flow of oil to the steering cylinder. This increased flow causes the cylinder to move farther and faster, which turns the machine faster.When the steering wheel is not being turned, control section A is in the NEUTRAL position. The metering pump is a closed center valve, so there is no alignment between the passages in the spool and orifices in the sleeve in this position. Only a small amount of oil flows through the center position to keep the spool slightly open and ready for quick response to steering demands.When the steering wheel is turned for a right turn, pump oil flows into the metering pump through inlet (3) and passage (4). From passage (4) oil flows into Gerotor (8) through passage (12). With the steering wheel turning, Gerotor (8) is turning and pumping oil. The oil flow comes out through passage (5), where it is directed to the steering cylinders through the right turn port.When the steering wheel started to turn; shaft spool (9), pin (10) and drive (6) also started to turn. Sleeve (11) did
Pump and Compensator Operation
(1) Pressure compensator spring. (2) Flow compensator spring. (3) Cavity. (4) Signal line. (5) Flow compensator spool. (6) Actuator piston. (7) Case drain. (8) Bias spring. (9) Swashplate. (10) Passage. (11) Line. (12) Passage. (13) Pressure compensator spool. (14) Pressure compensator cavity. (15) Plug. (16) Check valve. (17) Passage. (18) Passage. (19) Passage. (20) Check valve. (21) Signal line from metering pump. (22) Pressure line to metering pump.When the hydraulic system stalls under load or when the cylinders reach the end of the stroke, the system pressure increases. The signal pressure in line (4) and cavity (3) becomes equal to the pump output pressure. Spring (2) keeps spool (5) shifted down.When system pressure reaches 19 700 kPa (2856 psi) in passage (12), the upward force on pressure compensator spool (13) will compress spring (1), and move pressure compensator spool (13) upward. Supply oil flows through passage (18) and (17) to actuator piston (6). Pressure felt on the actuator piston will destroke the pump. Pump output (flow) decreases while system pressure is limited to 19 700 kPa (2856 psi).Check valve (16) prevents damage to the pump during stall conditions. Check valve (16) allows system pressure oil to bypass the margin spool and flow to actuator piston (6).Metering Pump (Steering)
Metering Pump (Steering)Metering pump is located under the operator station floor plates at the base of the steering column.
Metering Pump
(1) Outlet to tank. (2) Metering Pump inlet check valve. (3) Inlet from pump. (4) Passage. (5) Passage from Gerotor. (6) Drive. (7) Springs. (8) Gerotor. (9) Spool. (10) Pin. (11) Sleeve. (12) Passage to Gerotor. (19) Check valve (internal).The metering pump has two main sections; control section A and pump section B. These two sections work together to send oil to the steering cylinders.The direction and speed of a turn are controlled by the metering pump. As the steering wheel is turned faster, there is an increase in the flow of oil to the steering cylinder. This increased flow causes the cylinder to move farther and faster, which turns the machine faster.When the steering wheel is not being turned, control section A is in the NEUTRAL position. The metering pump is a closed center valve, so there is no alignment between the passages in the spool and orifices in the sleeve in this position. Only a small amount of oil flows through the center position to keep the spool slightly open and ready for quick response to steering demands.When the steering wheel is turned for a right turn, pump oil flows into the metering pump through inlet (3) and passage (4). From passage (4) oil flows into Gerotor (8) through passage (12). With the steering wheel turning, Gerotor (8) is turning and pumping oil. The oil flow comes out through passage (5), where it is directed to the steering cylinders through the right turn port.When the steering wheel started to turn; shaft spool (9), pin (10) and drive (6) also started to turn. Sleeve (11) did
Caterpillar SIS machinery equipment:
Parts torque Caterpillar catalog:
6K5412
TORQUE CONVERTER COOLER LINES
955K, 955L
955K, 955L