Complete digital official shop manual contains service, maintenance, and troubleshooting information for the Kobelco SK430-III, SK430LC-III Crawler Excavators. Diagnostic and repair procedures are covered in great detail to repair, maintain, rebuild, refurbish or restore your excavators like a professional mechanic in local service/repair workshop. This cost-effective quality manual is 100% complete and intact as should be without any missing pages. It is the same factory shop manual used by dealers that guaranteed to be fully functional to save your precious time.

This manual for Kobelco SK430-III, SK430LC-III Crawler Excavators is divided into different sections. Each section covers a specific component or system and, in addition to the standard service procedures, includes disassembling, inspecting, and assembling instructions. A table of contents is placed at the beginning of each section. Pages are easily found by category, and each page is expandable for great detail. It is in the cross-platform PDF document format so that it works like a charm on all kinds of devices. You do not need to be skilled with a computer to use the manual.

“SK430(LC)-III (S5LS0004E).pdf”
Kobelco SK430-III, SK430LC-III Crawler Excavators Shop Manual; 690 pages

“SK430(LC)-III (S5LS0005E).pdf”
Kobelco SK430-III, SK430LC-III Crawler Excavators Shop Manual; 586 pages

EXCERPT:

FUEL AND ENGINE CONTROL - GENERAL
(1) Injection pump proper
(a) Injection pump
The camshaft driven at half the engine speed is supported by taper roller bearings at both ends. The camshaft has a cam for operating the plunger and a cam for operating the feed pump.
A tappet operating with the pump housing as the guide is in contact with the camshaft. The tappet changes the rotary motion of the cam to up-and-down motion which is transmitted to the plunger.
The P type injection pump offers the following features.
1) The pump housing is a totally enclosed type.
2) The plunger barrel has an oblique hole made to return the fuel that has leaked to the oil sump to minimize the leakage of the fuel into the cam chamber.
3) To prevent the fuel in the oil sump from leaking into the cam chamber, an 0-ring is provided on the outer circumference of the plunger barrel, thereby maintaining its tightness.
4) A deflector is provided on the outer circumference of the plunger barrel to prevent erosion of the pump housing that may be caused by counter flow of fuel at the end of an injection.
(b) Plunger and plunger barrel
The plunger has an obliquely cut groove (lead) and a vertical groove as illustrated. The plunger barrel has two fuel suction/discharge ports.
Fuel fed into the injection pump is sent under pressure by the camshaft rotation, or the reciprocating motion of the plunger as follows.
When the plunger moves down from the top dead center and opens the suction/discharge ports in the plunger barrel, fuel is not only drawn into the barrel by a vacuum created during the plunger's downward stroke but also sent into the barrel under pressure by the feed pump.
On the upward stroke, the plunger begins to compress fuel as it completely closes the sectional discharge ports in the plunger barrel.
With the plunger further going up and with the fuel pressure increasing, the plunger overcomes the force of delivery valve spring, pushing up the delivery valve.
This causes fuel to be sent under pressure through the injection pipe to the injection nozzle.
The amount of fuel injected will be changed according to the engine operating loads by turning the plunger a given angle to increase or decrease the effective stroke. To be more precise, operation of the control lever or governor moves the control rack (or control rod) to the right or left, which results in the control sleeve being turned. The bottom end of the control sleeve meshes with the driving face of the plunger; thus, as the control sleeve rotates, the plunger also rotates to vary the effective stroke, thereby increasing or decreasing the amount of fuel injected.
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