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HARNESS AS 2277872 - Caterpillar



2277872 HARNESS AS Caterpillar parts HARNESS
Rating:
81
Alternative (cross code) number:
CA2277872
227-7872
2277872
Caterpillar 2277872 HARNESS AS

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With engine at low idle and warm, the oil pressure indicator should go off within 15 seconds. If not, stop the engine immediately and investigate.
1. Keep the engine at low idle until the engine oil pressure indicator goes off.2. Operate the engine 900-1200 rpm for time shown below. Do not engage any controls during this time.A. Below 0°C (0°F) 15 Min.B. 0°C to -18°C (0°F to 32°F) 10 MinutesC. 0°C to 21°C (-32°F to 70°F) 5 Minutes3. The low air pressure alarm will sound until the service brake/retarder air reservoirs are charged to approximately 415 kPa (60 psi).If horn is sounding and air pressure is good, the coolant flow alarm is sounding. Shut off engine immediately and check coolant level. Also, check the EMS panel to determine cause. 4. The alternator indicator (1) should be off. If it stays on after engine is running, stop the engine and investigate.5. If the transmission oil filter indicator (2) is on continuously with warm oil, stop the engine and service the transmission and torque converter filters.To provide maximum sound suppression on machines equipped with sound suppressed cabs, keep all doors and windows closed.Check the engine oil, steering transmission, hoist, converter and brake oil levels with the engine at low idle and the oil at normal operating temperature. 6. Check the engine crankcase oil level. Maintain the oil level between the ADD and FULL marks on the ENGINE RUNNING side of the dipstick. 7. Check the steering system hydraulic oil level.After engine startup, recheck the oil level. If the oil level registers FULL at lower gauge (2), then the accumulators are properly charged.If it registers below the ADD mark in lower sight gauge (2), it is incorrectly precharged. See your Caterpillar dealer for charging procedures.If oil must be added, stop the engine with the key start switch and wait for accumulators to discharge. 8. Check the transmission sight gauge (1) with cold oil, engine idling. Check the transmission sight gauge (3) with hot oil, engine idling.Check the hoist converter and brake sight gauge (2) when the engine is running and the oil is warm. The oil level should fill the sight gauge.Observe all gauges, warning and service lights frequently during operation. All gauges should indicate in the proper range and all warning and service indicators should be off.Testing the Secondary Brake System
Test operation of secondary brake system daily, or at the beginning of each shift. This is a test to determine if secondary brake system is functional. This test is not intended to measure maximum brake holding effort. Brake holding effort required to hold a machine at a specific engine rpm will vary from machine to machine due to differences in engine setting, power train efficiency, etc., as well as differences in brake holding ability.Engine rpm at beginning of machine movement, with secondary brake applied, should be compared against the engine rpm your specific machine was able to hold on a prior test.1. Start the engine and allow the air system pressure


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