Maintenance - Section 4 OM4017.2 Page 4-26 Reciprocating Pump Automatic Lube System Preventative Maintenance Procedures The following maintenance procedures should be used to insure proper system operation. Daily Lubrication System Inspection 4. Inspect all bearing points for a bead of lubricant around the bearing seal. 1. Check grease reservoir level. Inspect grease level height after each shift of operation. Grease usage should be consistent from day-to-day operations. It is good practice to manually lube each bearing point at the grease fitting (Figure 4-5) provided on each Injector.
This will indicate if there are any frozen or plugged bearings, and will help flush the bearings of contaminants. Lack of lubricant usage would indicate an inoperative system. 5. System Checkout Excessive usage would indicate a broken sup- ply line. a. Remove all SL-1 injector cover caps to allow visual inspection of the injector cycle indicator pins during system operation. 2. Check all grease feed hoses (11, Figure 4-3) from the SL-1 Injectors to the lubrication points. b. Start truck engine. a. Repair or replace all worn / broken feed line hoses. c. Lift the passenger seat and connect a jumper wire between “SOL” (Wire 68A) and “LUBE SW” on the 24VDC solid state timer (Figure 4-8).
The hydraulic grease pump should operate. b. Make sure that all air is purged and all new feed line hoses are filled with grease before sending the truck back into service. d. Keep the jumper wire connected until the pump stalls out at 2000 PSI. (Refer to NOTE: following step 7, page 4-15, regarding pressure switch.) 3. Inspect key lubrication points for a bead of lubri- cant around seal. e. With the pump in the stalled-out mode, check each SL-1 injector assembly. The cycle indicator pin should be retracted inside the injector body. Make note of all lubrication points that look dry. Notify maintenance staff for repair service. 250 Hour Inspection 1.
Check all grease feed line hoses from the SL-1 Injectors to the lubrication points (11, Figure 4-3). f. Once all of the SL-1 injectors have been in- spected under pressure remove the jumper wire between the “SOL” terminal and “LUBE SW” terminal on the timer assembly. The pump should shut off and the pressure in the system should drop to zero venting back to the grease reservoir. a. Repair or replace all worn / broken feed line hoses. b. Make sure that all air is purged and all new feed line hoses are filled with grease before sending the truck back into service. g. With the system vented, check all of the SL-1 injector indicator pins. All of the pins should be visable. 2.
Check all grease supply line hoses from the pump to the SL-1 injectors (11, Figure 4-3, typical). a. Repair or replace all worn / broken supply lines. NOTE: Refer to the system troubleshooting chart, if the injectors are not working properly. Replace or repair injectors, if defective . b. Make sure that all air is purged and all new supply line hoses are filled with grease before sending the truck back into service. 3. Check grease reservoir level. h. Reinstall all injector cover caps. i. Check timer operation. a. Fill reservoir if low. With engine running, lube system should acti- vate within 5 minutes. The system should build 2000PSI within 25-40 seconds. b.
Check reservoir for contaminants. Clean, if required. c. Check that all filler plugs, covers and breather vents on the reservoir are intact and free of contaminants. j. If the system is working properly, the machine is ready for operation. k.If the system is malfunctioning, refer to the trou- bleshooting chart in the service manual.