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4.1 Automatic Locking Differential (ASD)   >   33 Hydraulic Test Program - Test

Test step Test scope Test connection Test condition Nominal value Possible cause/Remedy 1.0 Gas pressure in pressure reservoir 250 bar at pressure release screw on hydraulic unit Engine: at Idle System depressurized. Rapid pressure buildup up to 22 bar followed by slow buildup up to 33 bar. If rapid pressure buildup stops at 10 bar, replace pressure reservoir. 2.0 Pressure test 250 bar Engine: at Idle 27 - 33 bar Pressure < 27 bar: Model 124, 201 See SMS Job No. 32-0530 Model 129 3.1 32 Pressure > 38 bar: Replace hydraulic unit.