Maintenance - Section 4 OM4017.2 Page 4-20 Reciprocating Pump Automatic Lube System Pump Cycle Timer (Flasher Timer): The Pump Cycle Timer mounts on SV2 solenoid and generates a timed pulse signal to control the recipro- cating cycle rate of the grease pump. 1. The adjustment screw should be turned 20 turns counter-clockwise to insure a minimum start point. Pump Cycle Timer (Flasher Timer) Installation NOTE: The timer cannot be adjusted below minimum - additional turns counter-clockwise have no effect . 1. Connect cycle timer to SV2. Be sure to install gasket. 2. Connect the Sol. wire (68) from the Solid State Timer to the Brown wire from the Cycle Timer and one of the wires coming from SV1.
2. Each clockwise turn of the adjustment screw will equal approximately 0.3 seconds. 3. Add the number of turns clockwise to reach the approximate desired timing. 3. Connect the White wire from the Cycle Timer and the other (gnd) wire coming from SV1. Some additional adjustment may be necessary depending on the accuracy needed. NOTE: Use the light on the cycle timer to help in setting the time. The light will turn On when there is power going to SV2 . Pump Cycle Timer (Flasher Timer) Adjustment: The Pump Cycle timer is factory set at 1 second “On” and 1 second “Off” for 30 cycles/minute. If adjustment is necessary, refer to Figure 4-6 and the following procedure.
Pressure Switch, 2,000 psi (13 790 kPa) Normally Closed (N.C.) This lube circuit incorporates a 2,000 psi (13 790 kPa) N.C. pressure switch that opens the 24 volt supply to the flasher timer and switching solenoid, SV2. When this occurs, the grease pump stops stroking, but the vent valve remains closed until the 24 VDC solid state lube timer has reached the end of its cycle. Between the time the pressure switch opens and the lube timer completes its cycle, the pump cylinder still has oil pressure supplied to it; but it remains at the end of its stroke and does not switch. This period in time is easily identified, as the LED on the flasher timer stops flashing and remains “Off”.
Also, the oil pressure gauge no longer fluctuates, but remains steady. FIGURE 4-6. PUMP CYCLE TIMER 1. Adjustment Screw 2. Red Light (Indicates Timer Has Turned On) The one adjustment screw adjusts both the “On” time and “Off” time equally. The adjustment range is from 0.5 seconds (60 cycles/minute) to 5.0 seconds (6 cy- cles/minute). The adjustment screw allows 15 turns of adjustment over the timing range.