OM4203 Automatic Lubrication System - Section 42 42-1 AUTOMATIC LUBRICATION SYSTEM GENERAL DESCRIPTION During the down stroke, the pump cylinder is extended into the grease. Through the combination of shovel action and vacuum generated in the pump cylinder chamber, the grease is forced into the pump cylinder. Simultaneously, grease is discharged through the out- let of the pump. The volume of grease during intake is twice the amount of grease output during one cycle. During the upstroke, the inlet check valve closes, and one half the grease taken in during the previous stroke is transferred through the outlet check and discharged to the outlet port.
The Lincoln Automatic Lubrication System is a pressur- ized lubricant delivery system which delivers a con- trolled amount of lubricant to designated lube points. The system is controlled by an electronic timer which signals a solenoid valve to operate a hydraulic motor powered grease pump. Hydraulic oil for pump opera- tion is supplied by the truck steering circuit. Grease output is proportional to the hydraulic motor input flow. A pump control manifold, mounted on top of the hydraulic motor, controls input flow and pressure. A 24VDC Solenoid mounted on the manifold turns the pump on and off.
The pump is driven by the rotary motion of the hydrau- lic motor, which is then converted to reciprocating motion through an eccentric crank mechanism. The reciprocating action causes the pump cylinder to move up and down. The pump is a positive displacement, double-acting type as grease output occurs on both the up and the down stroke Over-pressurizing of the system, modifying parts, using incompatible chemicals and fluids, or using worn or damaged parts, may result in equipment damage and/or serious personal injury. DO NOT exceed the stated maximum work- ing pressure of the pump, or of the lowest rated component in the system.
Do not alter or modify any part of this sys- tem unless approved by factory authoriza- tion. Do not attempt to repair or disassemble the equipment while the system is pressurized. Make sure all fluid connections are securely tightened before using this equipment. Always read and follow the fluid manufac- turer's recommendations regarding fluid compatibility, and the use of protective clothing and equipment. Check all equipment regularly and repair, or replace, worn or damaged parts immedi- ately. This equipment generates very high grease pres- sure.
Extreme caution should be used when oper- ating this equipment as material leaks from loose or ruptured components can inject fluid through the skin and into the body causing serious bodily injury including possible need for amputation. Ade- quate protection is recommended to prevent splashing of material onto the skin or into the eyes. FIGURE 42-1. PUMP & RESERVOIR COMPONENTS 1. Hose From Filter 2. Outlet to Injectors 3. Hydraulic Motor 4. Pressure Reducing Valve 5. Solenoid Valve 6. Test Switch 7. Vent Valve 8. Pressure Gauge 9. Pump Assembly 10. 1Flow Control Valve 11. Pressure Switch 12. Grease Reservoir 13.
Vent Hose If any fluid appears to penetrate the skin, get emer- gency medical care immediately! Do not treat as a simple cut. Tell attending physician exactly what fluid was injected.