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 monitor which is started on the service mode or the service menu of Dr. ZX, which is started by MC of the controller. 2.
Warm up the machine until coolant temperature reaches 50 ° C (122 ° F) or more, hydraulic oil temperature is 50 ± 5 ° C (122 ± 9 ° F) and transmis- sion oil temperature is 85 ± 5 ° C (185 ± 9 ° F). Measurement: 1. Measure the items as followings: slow idle (with no load), fast idle (with no load), fast idle (when the engine stalls) and fast idle (when the engine stalls and is relieved). 2. When measuring, set the switch and test condi- tion as shown in the table below in response to the engine speed to be measured.
M4GB-01-039 T4-3-1 FNR Lever Accelerator Pedal Travel Mode Switch Work Mode Switch Slow Idle (with no load) N Not depressing H N Fast Idle (with no load) Forward speed 3/4 Fully depressing H N Fast Idle (when engine stalls) Forward speed 3/4 Fully depressing H N Fast Idle (when engine stalls and is relieved) Forward speed 3/4 Fully depressing H N