OM4015.2 10/98 Lubrication & Service - Section 4 Lincoln Automatic Lubrication System Page 4-13 3. Turn air pump vent plug counterclockwise one full turn. To expel trapped air between air pump and supply line connection, run air motor until grease flows freely from the vent plug. Close vent plug clockwise. 4. Voltage checks at the timer should be accom- plished if the above checks do not identify the problem. a. Insure timer ground connection is clean and tight. 4. Continue to run air pump until grease flows from any one plug opening in the system. Replace plug in this opening. b.
Using a Volt-Ohm meter, read the voltage be- tween positive and negative posts on the solid state timer with the truck keyswitch "ON". Normal reading should be 18-26 VDC, depend- ing upon whether or not the engine is running. 5. Repeat step 4 until all lines are full and all plugs replaced. NOTE: Fill each feed line with grease before connect- ing lines to the injector outlets and bearings. This will prevent having to cycle the individual injectors once for each 1.0 in. (25 mm) length of feed line between the injector and bearing fitting . 24 VDC Solid State Timer Adjustment The timer is factory set for a nominal 2.5 minute (off time) interval.
Dwell time is approximately 1 minute, 15 seconds. A longer interval (off time) is obtained by turning the Selector knob (3, Figure 4-3) to the desired position . System Checkout To check system operation (not including timer), pro- ceed as follows: 1. Lift the passenger seat and connect a jumper wire between “SOL” terminal and “LUBE SW” terminal on the 24 VDC solid state lube timer. Turn keyswitch "ON". Pump should operate. NOTE: If terminal post identification on the solid state timer is not legible, refer to Figure 4-5 for terminal positions . 2. Keep jumper wire connected until the pump stalls. 3. Disconnect jumper wire. System should vent. Turn keyswitch "OFF". FIGURE 4-3.
TIMER (TOP COVER REMOVED) 1. Timer 3. Timer Selector 2. Red LED (Light Emitting Diode) indicates pump solenoid is "ON". 24 VDC Solid State Timer Check To check the solid state timer operation without waiting for the normal timer setting, proceed as follows: 1. Remove timer dust cover. NOTE: The timer incorporates a liquid and dust tight cover which must be in place and secured at all times during truck operation . NOTE: Set timer by turning the Selector knob (3) to the 2.5 minute setting point. Then, turn the Selector clock- wise, one detent at a time, to the desired setting, or until the maximum limit of eighty minutes is reached . 2. Adjust timer to 5 minute interval setting. 3.
The timer should cycle in five minutes if the truck is operating. The solid state timer is a sealed unit, do not attempt disassembly. NOTE: If the timer check is being made on a cold start, the first cycle will be approximately double the nominal setting. All subsequent cycles should be within the selected time tolerance .