ACCUMULATOR & MTG GP-BRAKE 2511446 - Caterpillar

Component Maintenance
Inspect the following components:3-Pin Wiring Harness
Inspect harness for damaged wiring.
Inspect for secure connections at all ends of the harness.5-Pin Wiring Harness
Inspect harness for damaged wiring.
Inspect for secure connections at all ends of the harness.23-Pin Wiring Harness
Inspect harness for damaged wiring.
Inspect for secure connections at all ends of the harness.
Turn off power supply before unplugging or plugging in the 23-pin harness.Air Pressure Switch (three-way solenoid)
The air pressure switch is used to notify the ECM that the minimum 275 kPa (40 psi) air pressure is present.
Inspect for leaks.
Inspect for damaged wiring or faulty connections.
Replace if damaged or faulty.Boost Pressure Sensor
Inspect for damaged wiring to the boost sensor.
Inspect for damage of any tubing to the boost sensor.
Verify boost sensor reading with a vacuum gauge or CatET.
Replace if damaged or faulty.Dosing Control Cabinet
Inspect for damaged wiring or faulty connections.
Replace if damaged or faulty.
Inspect for DEF leaks
Inspect Sediment Strainer for contaminantsDifferential Pressure Sensor (back-pressure)
Inspect for damage wiring to the differential pressure sensor.
Inspect for damaged tubing and lines to the differential pressure sensor.
Verify differential pressure sensor reading using a manometer.
Replace if damaged or faulty.
Trend and document system back-pressure readings during operation to verify DPF/DOC maintenance interval effectiveness.
Do not exceed TMI/documented recommended back-pressure.Overhaul Intervals
Use whichever criteria occurs first to determine the correct overhaul interval..
Table 1
Overhaul Maintenance Interval Schedule(1)(2)(3)
Interval Fuel Burned Service Hours(4) MW/hrs Maintenance Procedures
Top End 2200000 L (600000 US gal) 16000 10000 Refer to this Operation and Maintenance Manual, "Overhaul (Top End)".
Major overhaul 4542492 L (1200000 US gal) 36000 20000 Refer to this Operation and Maintenance Manual, "Overhaul (Major)"
(1) Engines rated at 1800 rpm
(2) Assumption based on cycle weighted fuel efficiency of 218
(3) Fuel burns, service hours, and MW/hrs start from the date of manufacture or remanufacture. Fuel burns, service hours, and MW/hrs are cumulative.
(4) Service hours are calculated based on 25% load factor and 566.6 L (149.7 US gal) per hour.