Place truck in neutral
Restar vehicle
Within the first 15 seconds the following must occur
A: oil pressure indicator must rise to between 20-80 psi
B: oil pressure indicator light/buzzer must turn off
Bring rpm to 1500
Once both air gauges rise above 85 psi time built up rate either gauge reaches 100 psi, this should not take more than 45 seconds
Continue to build pressure until governor cut out activates at 120-125 psi