OPERATIONAL PERFORMANCE TEST / Engine Test ENGINE SPEED Summary 1. Measure the engine speed by using the monitor unit or Dr. ZX.) 2. Measure the engine speeds in each mode. NOTE: If the engine speed is not adjusted correctly, all other performance data will be unreli- able. Consequently, measure the engine speed before performing all other tests in order to check that the engine speed meets specification. Preparation: 1. Select the service menu of monitor (In case of Dr. ZX, install Dr. ZX first). 2. Warm up the machine until coolant temperature reaches 50 ° C (122 ° F) or more, and hydraulic oil temperature is 50 ± 5 ° C (122 ± 41 ° F). T4-3-1