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Caterpillar 120K & 120K Series 2 Motor Graders Factory Service & Shop Manual Complete workshop & service manual with electrical wiring diagrams for Caterpillar 120K & 120K Series 2 Motor Graders. It’s the same service manual used by dealers that guaranteed to be fully functional and intact without any missing page. Caterpillar 120K & 120K Series 2 Motor Graders service & repair manual (including maintenance, overhaul, disassembling & assembling, adjustment, tune-up, operation, inspecting, diagnostic & troubleshooting…) is divided into different sections. Each section covers a specific component or system with detailed illustrations. 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. The printer-ready PDF documents work like a charm on all kinds of devices. FILELIST: KENR8244 – Schematic (12K, 120K, 140K and 160K Motor Grader Electrical System) KENR8245 – Schematic (12K, 120K, 140K, and 160K Motor Grader Hydraulic System) KENR8412 – Specifications (120K and 120K Series 2 Motor Grader Hydraulic and Steering System) KENR8413 – Systems Operation (120K and 120K Series 2 Motor Graders Hydraulic and Steering System) KENR8413 – Testing and Adjusting (120K and 120K Series 2 Motor Graders Hydraulic and Steering System) KENR8413 – Troubleshooting (120K and 120K Series 2 Motor Graders Hydraulic and Steering System) KENR8414 – Specifications (120K and 120K Series 2 Motor Graders Air System and Brakes) KENR8415 – Systems Operation (120K and 120K Series 2 Motor Graders Air System and Brakes) KENR8415 – Testing and Adjusting (120K and 120K Series 2 Motor Graders Air System and Brakes) KENR8415 – Troubleshooting (120K and 120K Series 2 Motor Graders Air System and Brakes) KENR8416 – Specifications (120K and 120K Series 2 Motor Graders Power Train) KENR8437 – Disassembly and Assembly (120K and 120K Series 2 Motor Graders Engine Supplement) KENR8438 – Disassembly and Assembly (120K and 120K Series 2 Motor Graders Power Train) KENR8439 – Disassembly and Assembly (120K and 120K Series 2 Motor Graders Machine Systems) UENR5014 – Schematic (12K, 120K, 140K, and 160K Motor Grader Electrical System) UENR7717 – Schematic (12K, 120K, 140K, and 160K Motor Grader Electrical System) … EXCERPT: 1) Hydraulic tank (2) Filter element (3) Bypass valve (AA) Implement return port (BB) Case drain return port (CC) Secondary steering port (DD) Implement suction port Hydraulic tank (1) is located behind the operator’s cab. The oil reservoir is not vented. The oil reservoir contains a reverse flow element. Pressure is relieved when the cap is loosened. Secondary steering suction port (CC) and implement suction port (DD) provide outlets for the oil. These outlets flow to the implement and steering pump and the secondary steering pump. Case drain return port (BB) and implement return port (AA) combine the oil into the manifold. The manifold routes the oil through the bottom of the filter element and inside of the filter element. The filter element is positioned below the oil level in order to reduce turbulence. If the filter element becomes full of debris, oil cannot pass through the filter element. The restriction to oil flow causes a pressure increase which opens bypass valve (3). A pressure of 35 kPa (5 psi) will cause the bypass valve to open. Now, the oil is allowed directly into hydraulic tank (1). When oil bypasses filter element (2), debris in the oil will cause damage to other system components. Correct maintenance must be used in order to make sure that the filter element does not stop the flow of clean oil to the hydraulic system. …


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Caterpillar 120K & 120K Series 2 Motor Graders Factory Service & Shop Manual
Complete workshop & service manual with electrical wiring diagrams for Caterpillar 120K & 120K Series 2 Motor Graders. It’s the same service manual used by dealers that guaranteed to be fully functional and intact without any missing page.

Caterpillar 120K & 120K Series 2 Motor Graders service & repair manual (including maintenance, overhaul, disassembling & assembling, adjustment, tune-up, operation, inspecting, diagnostic & troubleshooting…) is divided into different sections. Each section covers a specific component or system with detailed illustrations. 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. The printer-ready PDF documents work like a charm on all kinds of devices.

FILELIST:
KENR8244 – Schematic (12K, 120K, 140K and 160K Motor Grader Electrical System)
KENR8245 – Schematic (12K, 120K, 140K, and 160K Motor Grader Hydraulic System)
KENR8412 – Specifications (120K and 120K Series 2 Motor Grader Hydraulic and Steering System)
KENR8413 – Systems Operation (120K and 120K Series 2 Motor Graders Hydraulic and Steering System)
KENR8413 – Testing and Adjusting (120K and 120K Series 2 Motor Graders Hydraulic and Steering System)
KENR8413 – Troubleshooting (120K and 120K Series 2 Motor Graders Hydraulic and Steering System)
KENR8414 – Specifications (120K and 120K Series 2 Motor Graders Air System and Brakes)
KENR8415 – Systems Operation (120K and 120K Series 2 Motor Graders Air System and Brakes)
KENR8415 – Testing and Adjusting (120K and 120K Series 2 Motor Graders Air System and Brakes)
KENR8415 – Troubleshooting (120K and 120K Series 2 Motor Graders Air System and Brakes)
KENR8416 – Specifications (120K and 120K Series 2 Motor Graders Power Train)
KENR8437 – Disassembly and Assembly (120K and 120K Series 2 Motor Graders Engine Supplement)
KENR8438 – Disassembly and Assembly (120K and 120K Series 2 Motor Graders Power Train)
KENR8439 – Disassembly and Assembly (120K and 120K Series 2 Motor Graders Machine Systems)
UENR5014 – Schematic (12K, 120K, 140K, and 160K Motor Grader Electrical System)
UENR7717 – Schematic (12K, 120K, 140K, and 160K Motor Grader Electrical System)
…

EXCERPT:
1) Hydraulic tank
(2) Filter element
(3) Bypass valve
(AA) Implement return port
(BB) Case drain return port
(CC) Secondary steering port
(DD) Implement suction port
Hydraulic tank (1) is located behind the operator’s cab. The oil reservoir is not vented. The oil reservoir contains a reverse flow element. Pressure is relieved when the cap is loosened. Secondary steering suction port (CC) and implement suction port (DD) provide outlets for the oil. These outlets flow to the implement and steering pump and the secondary steering pump. Case drain return port (BB) and implement return port (AA) combine the oil into the manifold. The manifold routes the oil through the bottom of the filter element and inside of the filter element. The filter element is positioned below the oil level in order to reduce turbulence.
If the filter element becomes full of debris, oil cannot pass through the filter element. The restriction to oil flow causes a pressure increase which opens bypass valve (3). A pressure of 35 kPa (5 psi) will cause the bypass valve to open. Now, the oil is allowed directly into hydraulic tank (1). When oil bypasses filter element (2), debris in the oil will cause damage to other system components. Correct maintenance must be used in order to make sure that the filter element does not stop the flow of clean oil to the hydraulic system.
…