Komatsu 930E-2, Shop Manual

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AUTOMATIC LUBRICATION SYSTEM
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, controls input flow and pres-
sure. 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.
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.
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 manufac-
turer’s recommendations regarding fluid
compatibility, and the use of protective cloth-
ing 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 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.
Adequate protection is recommended to prevent
splashing of material onto the skin or into the eyes.
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.
FIGURE 3-1. PUMP AND RESERVOIR
COMPONENTS
1. Hose From Filter
2. Outlet to Injectors
3. Hydraulic Motor
4. Pressure Reducing
Valve
5. Solenoid Valve
6. Vent Valve
7. Pressure Gauge
8. Pump Assembly
9. Flow Control Valve
10. Pressure Switch
11. Junction Box
12. Grease Reservoir
13. Vent Hose
P03018 4/00 Automatic Lubrication System P3- 1