OM4012.2 Maintenance - Section 4 Automatic Lube System Reciprocating Pump Page 4-13 LINCOLN AUTOMATIC LUBRICATION SYSTEM The Lincoln Automatic Lubrication System is a pressur- ized lubricant delivery system which delivers a control- led amount of pressurized lubricant to designated lube points. The system is controlled by an electric timer which signals solenoid valves to cause operation of a hydraulically operated grease pump. For the 930E, these components (valves and pump) are mounted on the right side front bumper in front of the upright frame support (View A-A, Figure 4-3). System Components The system is comprised of these basic elements plus the necessary hoses and lube lines: 1.
Hydraulically Powered Reciprocating Cylinder and Pump (1 & 5, Figure 4-2). Pump Specifications: 16:1 Pressure Ratio. NOTE: The theoretical ratio of this pump is 16:1 MAXIMUM, depending on the application and variable internal friction. The actual ratio may be less, but should be at least 10:1 . Input Pressure: 300-3000 p.s.i. (2068 - 20685 kPa) input Flow : 1.0 g.p.m. (3.8 l/min.) Maximum Hydraulic Temperature: 210°F (98.8°C) Output Pressure: 3500 p.s.i. (24132 kPa) MAX. Output Flow: 11 cu. in./min. (180 cc/min.) Operating Ambient Temperature: -40°F to + 135°F (-40°C to + 57.7°C) Seals: Buna-N Filtration Required: 10 Micron 24VDC power source. FIGURE 4-2. TYPICAL AUTO LUBE SYSTEM 1.
Pump Cylinder 7. Pump Cycle Timer 2. Cyl. Pressure Gauge 8. Solenoid Valve, SV2 3. Valve Body Assy. 9. Solenoid Valve, SV1 4. Orifice Assembly 10. Press. Reducing Valve 5. Pump Assembly 11. Vent Valve Assy. 6. Cannister/Reservoir 2. Combination Valve Body (3, Figure 4-2) includes: a. 24VDC Solenoid Valves (SV1 & SV2) are used as directional valves that are integrated with the hydraulically operated pump. The controls are designed to insure maximum flow rates within the specified operating temperature range. c. The Cylinder Pressure Gauge (2): indicates hydraulic fluid pressure going to the hydraulic pump cylinder after passing through the pres- sure reducing valve. d. Orifice Assembly (4):
delivers metered hydrau- lic pressure from the pressure reducing valve to the top of the vent valve assembly. This fitting should be connected to the top of the Vent Valve assembly (11) with a high pres- sure 1/4 in. hose. Solenoid Valve SVI (9) controls hydraulic fluid pressure flow through the pressure reducing valve and on to the vent valve. Solenoid Valve SV2 (8) directs the hydraulic fluid to the hydraulic cylinder which operates the grease pump. 3. Pump Cycle Timer (7, Figure 4-2) also called a “Flasher” timer, because it contains an LED that illuminates when there is power going to SV2):
The Pump Cycle Timer mounts on SV2 solenoid and generates a timed pulse signal to control the reciprocating cycle rate of the grease pump. b. Pressure Reducing Valve: The Pressure Reducing Valve (10) lowers hy- draulic fluid pressure to the operating range of the hydraulic pump cylinder. It is factory set at its maximum pressure of 300 p.s.i. (2069 kPa), but may be adjusted lower.