Automatic Lubrication System; General Description - Komatsu 830E Shop Manual

GENERAL DESCRIPTION

The Lincoln Automatic Lubrication System is a pres-
surized lubricant delivery system which delivers a
controlled amount of lubricant to designated lube
points. The system is controlled by an electric timer
which signals a solenoid valve to operate a hydraulic
motor powered grease pump. Hydraulic oil for pump
operation 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 (3, Figure 3-1), controls input
flow and pressure. A 24VDC Solenoid (5) mounted
on the manifold turns the pump on and off.
The pump is driven by the rotary motion of the
hydraulic motor, which is then converted to recipro-
cating motion through an eccentric crank mecha-
nism. The reciprocating action causes the pump
cylinder to move up and down. The pump is a posi-
tive displacement, double-acting type as grease out-
put occurs on both the up and the down stroke.
.
FIGURE 3-1. PUMP COMPONENTS
1. Hose From Filter
2. Outlet to Injectors
3. Hydraulic Motor
4. Pressure Reducing
Valve
5. Solenoid Valve
6. Manual Override
P03022

AUTOMATIC LUBRICATION SYSTEM

7. Vent Valve
8. Pressure Gauge
9. Pump Assembly
10. Flow Control Valve
11. Pressure Switch
12. Grease Reservoir
13. Vent Hose
Automatic Lubrication System
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 outlet 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.
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 working
pressure of the pump, or of the lowest rated
component in the system.
* Do not alter or modify any part of this system
unless approved by factory authorization.
* 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 manufacturer's
recommendations regarding fluid compatibil-
ity, and the use of protective clothing and
equipment.
* Check all equipment regularly and repair, or
replace, worn or damaged parts immediately.
This equipment generates very high grease pres-
sure. Extreme caution should be used when
operating this equipment as material leaks from
loose or ruptured components can inject fluid
through the skin and into the body causing seri-
ous bodily injury including possible need for
amputation. Adequate protection is recom-
mended to prevent splashing of material onto the
skin or into the eyes.
If any fluid appears to penetrate the skin, get
emergency medical care immediately! Do not
treat as a simple cut. Tell attending physician
exactly what fluid was injected.
P3-1