OM4202 Automatic Lubrication System - Section 42 Page 42-13 POSSIBLE CAUSES SUGGESTED CORRECTIVE ACTION TROUBLE: Timer Turns On At Intervals Two To Ten Times More Often Than Set Time Interval Electrical noise is being introduced into the power supply to the timer overcoming suppressor capaci- tor 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 intervals, 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. Note: Common for trucks operating in a moist envi- ronment. Refer to Timer Adjustment and re-adjust timer or replace timer. RESERVOIR FILL PROCEDURE Lubricant Required for System Refer to Lubrication and Service - Lubrication Chart, for correct lubricant specifications. Above 32°C (90°F) - Use NLGI No.2 multipurpose grease (MPG). -32° to 32°C (-25° to 90°F) - Use NGLI No. 1 MPG. Below -32°C (-25°F) - Refer to local supplier for extreme cold weather lubricant requirements. Fill Procedure 1. Remove top vent plug (14, Figure 42-8). 2. Remove bottom fill plug (15). 3.
Connect the line from the lubricant delivery sys- tem to bottom fill port (15) and fill the reservoir until grease just begins to come out of the top vent hole, above. 4. Disconnect the line from the lubricant delivery system and install plugs (14 & 15), previously removed. FIGURE 42-8. TYPICAL AUTO LUBE SYSTEM 1. Pump Cylinder 2. Pressure Gauge 3. Valve Body 4. Orifice Assembly 5. Pump Assembly 6. Canister/Reservoir 7. Pump Cycle Timer 8. Solenoid Valve, SV2 9. Solenoid Valve, SV1 10. Pressure Reducing Valve 11. Vent Valve 12. Grease Return Line 13. Grease Supply Line 14. Top Vent Plug 15. Fill Supply Port