OM4017.2 Maintenance - Section 4 Automatic Lube System Reciprocating Pump Page 4-25 POSSIBLE CAUSES SUGGESTED CORRECTIVE ACTION TROUBLE: Timer Turns On At Intervals Two (2) To Ten (10) Times More Often Than Set Time Interval: Electrical noise is being introduced into the power supply to the timer overcoming suppressor capacitor causing uncontrolled turn-on of its output relay. IMPORTANT: In some instances, electrical noise may be generated into vehicle electrical system which may cause timer to turn on at random inter- vals, independent of timer setting.
If this occurs, a 250 to 1,000 MFD capacitor rated 150 to 350 VDC should be added across BAT (+ ) and BAT (-) terminals to suppress this noise and improve timer performance. TROUBLE: Timer Turns On At Intervals Faster Than Allowable Tolerances Of Settings: Timer out of adjustment or damaged component. Refer to “Timer Adjustment and re-adjust timer or re- place timer.