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DOOR G.-HOOD 7B0213 - Caterpillar



7B0213 DOOR G.-HOOD Caterpillar parts DOOR
Rating:
46
Alternative (cross code) number:
CA7B0213
7B-0213
7B0213
Caterpillar 7B0213 DOOR G.-HOOD

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Operation Checks
The front wheels must be on a dry, smooth hard surface and the hydraulic oil in the steering system must be warm.Start the machine. In first gear, slowly drive the machine while you turn the steering wheel. Drive the machine until the hydraulic oil temperature is approximately 65°C (150°F).Test the steering system with the engine at high idle. Rotate the steering wheel. Measure the time that is required to turn the front wheels from the full right turn position to the full left turn position and back to the full right turn position. If the time is more than 9.0 seconds, there could be a problem in the steering hydraulic system. If the time is less than 7.0 seconds, there could be a problem in the steering hydraulic system.Failures in the steering system can be at least one of the following items:
Broken oil line or a leak in an oil line connection
Worn steering piston pump
Worn steering metering pump
Pressure setting of steering check and relief valve
Worn steering check and relief valve
Leaking steering check and relief valve
Spools in the steering control valve that do not shift properly
Worn steering cylinders
Improperly charged steering accumulators
Pressure setting of the accumulator charging valve
Pressure setting of the pump control valve
Pressure setting of the steering relief valvePerformance Checks
Performance checks of the steering system can be used for the following purposes:
Diagnosis of poor performance
Source of oil leakage inside the hydraulic systemProblem: Noisy steering piston pump
Probable Cause
Air in the steering hydraulic circuit
Loose connection of the oil line on the inlet side of the steering piston pump
Low oil level in the steering hydraulic oil tank
Wrong oil viscosityProblem: Turning the steering wheel requires too much force
Probable Cause
Open backup relief valve
Low oil level in the steering hydraulic oil tank
Low oil pressure in the steering accumulators
Worn steering piston pump
Tight end cover on the steering metering pump
Interference of components on steering column with shaft
Improper operation of steering metering pump
Improper operation of steering check and relief valves
Cold oil
Kinked signal line
Leaky signal line
Bad steering solenoidProblem: The machine does not turn when the steering wheel is turned
Probable Cause
Air in system
Malfunction of the steering check and relief valves
Lack of oil in steering metering pump
Worn steering metering pump
Disengaged steering column shaft from steering metering pumpProblem: Erratic steering
Probable Cause
Air in system
Worn steering linkage
Worn cylinder piston
Loose cylinder piston
Malfunction of steering check and relief valvesProblem: The machine turns too slowly in both directions
Probable Cause
Not enough oil flow from the steering piston pump
Malfunction of steering check and relief valves
Failed steering accumulator
The priority spool, the amplifier spool, or the directional spool will only allow partial flow.Problem: Machine turns too slowly in one direction
Probable Cause
The directional spool does not shift fully due to restriction at one end.
Restriction in steering metering pump
Malfunction of the steering check and relief valvesProblem: The steering wheel does not return to the center position correctly
Probable Cause
Tight cover on steering metering pump
Interference of components on steering column with shaft
Restriction between spool and sleeve in steering metering pump
Damaged centering springs in steering metering pump
Broken centering springs in steering metering pumpProblem: Hot oil


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