General Description - Komatsu 730E Operation & Maintenance Manual

OM4035.2 02/03
Automatic Lube System

GENERAL DESCRIPTION

The Lincoln Automatic Lubrication System is a pressur-
ized lubricant delivery system which delivers a controlled
amount of lubricant to designated lube points. The sys-
tem 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 sup-
plied by the truck steering circuit.
Grease output is proportional to the hydraulic motor
input flow. A pump control manifold (4, Figure 3-1),
mounted on top of the hydraulic motor (2), 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 reciprocating motion
through an eccentric crank mechanism. The reciprocat-
ing 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.
FIGURE 3-1. PUMP COMPONENTS
1. Orifice Fitting
2. Hydraulic Motor
3. Pressure Reducing Valve
4. Manifold
5. Solenoid Valve
AUTOMATIC LUBRICATION SYSTEM
6. Pressure Guage
7. Pump Assembly
8. Flow Control Valve
9. Grease Outlet
10. Grease Pickup Tube
11. Manual Override
Simultaneously, grease is discharged through the outlet
(9) 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 compatibili-
ty, and the use of protective clothing and equip-
ment.
* 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 operat-
ing 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.
Maintenance - Section 4
Page 4- 13