Caterpillar 3126 Service Manual Free

Caterpillar 3126 service manual free

Caterpillar 3126 service manual free

Complete digital official shop manual contains service, maintenance, and troubleshooting information for the Caterpillar B, E Engine. It is the same factory shop manual used by dealers that guaranteed to be fully functional to save your precious time.

This manual for Caterpillar B, E Engine is divided into different sections.

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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.

Caterpillar 3126 service manual free

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. The operation of the Hydraulic Electronic Unit Injector HEUI fuel system is completely different from any other type of fuel system that is actuated mechanically. The HEUI fuel system is completely free of adjustment. Adjustments to the components that are mechanical can not be made.

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These fuel system components must not be disassembled. Disassembly will damage the components. If the components have been disassembled, Caterpillar may not allow a warranty claim or Caterpillar may reduce the warranty claim.

All fuel systems for diesel engines use a plunger and barrel in order to pump fuel under high pressure into the combustion chamber.

This fuel is pumped into the combustion chamber in precise amounts in order to control engine performance.

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The HEUI uses engine oil under high pressure in order to power the plunger. All other fuel systems use a fuel injection pump camshaft lobe in order to power the plunger.

Because the HEUI is much different, a technician must use different troubleshooting methods. The HEUI operates in the same way as a hydraulic cylinder in order to multiply the force of the high pressure oil. By multiplying the force of the high pressure oil, the HEUI can produce injection pressures that are very high. This multiplication of pressure is achieved by applying the force of the high pressure oil to a piston.

Caterpillar 3126, 3126B, 3126E Engine Workshop Repair & Service Manual on CD

The piston is larger than the plunger by approximately six times. The piston that is powered by engine lubrication oil under high pressure pushes on the plunger. This engine lubrication oil under high pressure is called the actuation pressure of the oil. The actuation pressure of the oil generates the injection pressure that is delivered by the unit injector.

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Injection pressure is greater than actuation pressure of the oil by approximately six times. Low actuation pressure of the oil results in low injection pressure of the fuel. During conditions of low speed such as idle and start, low injection pressure is utilized.

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High actuation pressure of the oil results in high injection pressure of the fuel. During conditions of high speed such as high idle and acceleration, high injection pressure is utilized.

Caterpillar 3126 service manual free

There are many other operating conditions when the injection pressure is between the minimum and the maximum. Regardless of the speed of the engine, the HEUI fuel system provides infinite control of injection pressure.

The ECM is a powerful computer that provides total electronic control of engine performance.

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The ECM uses data from engine performance that is gathered by several sensors. Then, the ECM uses this data in order to make adjustments to the fuel delivery, injection pressure and injection timing.

Download: 3126 Cat Engine Service Manual.pdf

The ECM contains programmed performance maps software in order to define horsepower, torque curves and rpm. This software is commonly called the personality module.

The software has already been installed in the replaceable computer chip. The B and E diesel truck engines do not have a replaceable personality module.

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The flash function of Cat ET will be used during the reprogramming. ECM 15 logs faults of engine performance. This is done by setting each injector to the same position while control linkage is in a fixed position called the synchronizing position. Control linkage is at synchronizing position when cylinder No.

Caterpiller 3126 Engine Workshop Service Repair Manual

Since injector No. Always synchronize an injector when it has been removed and reinstalled. Remove fuel shutoff solenoid to allow injector rack control linkage to move freely during injector synchronization. Remove fuel shutoff solenoid using Spanner Wrench 4C See Fig. Remove valve cover from intake manifold. Remove 4 bolts and cylinder No. Apply a small amount of clean engine oil to top of injector.

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Install Injector Spring Compressor 1U to cylinder head and injector. Tighten bolt on Spring Compressor 1V which is threaded into cylinder head hole for rocker arm assembly.

This compresses injector. Tap lightly with a soft hammer on spring compressor directly above injector to ensure free movement of injector rack bar. Categories Manual Others.