TM-9-2815-200-35 Maintenance Manual for AVDS-1790-2M AVDS-1790-2A and AVDS-1790-2AM Engines Download
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Figure 6-199a. Test stand assembly-FSN-4910-986-9873. (4) Testing fuel injection pump advance assembly using test stand - 4910-986-9873. Testing of fuel injection pump advance assembly is required on all units that have been overhauled to insure optimum engine performance. This testing will be accomplished prior to assembly of the engine rear fan and accessory drive housing assembly. The test stand is designed to check and bench test the advance characteristics of the fuel injection pump advance assembly, under conditions simulating engine operation over an operating range of 200 to 2600 RPM. The advance assembly is mounted in bearing sup- ports which simulate the mounting on the engine, and is loaded by using a basic AVDS- 1790 series engine fuel injection pump which is coupled to a drive gear. The test stand is in- strumented to permit direct observation of the advance assembly operating characteristics and adjustments may be made to the advance assembly without removing it from the test stand. Procedures for bench testing the advance assembly are as follows and covered in figures 6- 199a through 6-201: 6-165