Caterpillar 120H Motor Grader Parts Manual SEBP2539-02 – Complete Illustrated Parts Catalog PDF

Description

Caterpillar 120H Motor Grader Parts Manual – SEBP2539-02

This is the complete Caterpillar 120H Motor Grader parts manual compilation, published under document number SEBP2539-02. It is the same illustrated parts catalog used to identify and order serviceable components for the 120H, organized by assembly and cross-referenced by part number. Every major system on the machine has its own section, and the catalog closes with a full numerical part number index so you can work backwards from a part number to the page that shows it.

File Details

• Manual Type: Illustrated Parts Manual (Parts Catalog Compilation)
• Brand: Caterpillar
• Model: 120H Motor Grader
• Document Number: SEBP2539-02
• Languages: English, French, Spanish, Portuguese, German
• Page Count: 1,076
• File Format: PDF
• Publication: © 1998 Caterpillar

The English content runs throughout the book. The French section titles appear as Informations produit et concessionnaire, the Spanish as Información del producto, the Portuguese as Informações Sobre o Produto, and the German as Produkt- und Händlerinformation. A dedicated English–Portuguese parts nomenclature glossary is also included for technicians working across both languages.

Chapters Covered

• General Information
• Repair Alternatives
• Supplemental Coolant Additives
• Nomenclature
• Maintenance Parts
• Index
• Machine Arrangement
• Basic Engine
• Lubrication System
• Cooling System
• Air Inlet and Exhaust System
• Fuel System
• Electrical and Starting System
• Power Train
• Frame and Body
• Braking System
• Hydraulic System
• Implements
• Operator Station
• Service Equipment and Supplies

General Information, Repair Alternatives and Maintenance Parts

The front of the catalog explains how the 120H is identified by Product Information Number (PIN) and how component serial numbers work. Repair Alternatives pages cover remanufactured components — alternators, connecting rods, crankshafts, cylinder heads, ECMs, injectors, fuel pumps, governors, oil pumps, pistons, short blocks, starters, turbochargers and water pumps. Supplemental Coolant Additives pages list coolant system capacities in liters and gallons with the correct SCA part numbers for initial fill and for 250-hour maintenance intervals. The Maintenance Parts Index is one of the most practical sections in the book: it lists the most frequently ordered service parts (filters, breathers, caps, lamps, fuses, grease fittings, O-rings, seat belts) with description, quantity, where used and page reference.

Machine Arrangement and Engine Arrangement

Machine Arrangement pages break the 120H down by major assembly groups — chassis AR, general AR, engine AR, installation AR-engine and power train AR — with the correct group part numbers for each PIN prefix. Engine arrangements are listed for serial ranges starting at 98Z15500, 98Z22643 and 98Z18131, so you can confirm which engine build applies to your machine before ordering internal components.

Basic Engine

The largest technical block in the catalog covers the engine from the air compressor through to the valve mechanism. Sections include air compressor GP, camshaft GP, carrier GP-seal, cover groups (cylinder block, front housing, sound suppression, valve mechanism), crankshaft GP, cylinder block GP, cylinder head AS and GP, damper and pulley GP, drain GP-oil pan, drive GP-fan, drive GP-water pump, flywheel GP, gear GP-front, housing groups (flywheel, front), lifting GP-engine, lines groups (air compressor, drain, engine oil, fuel, turbocharger oil, water), mounting GP-engine and transmission, pan GP-oil, piston and rod GP, pulley GP-crankshaft, rocker arm GP, seal groups (crankshaft, flywheel housing), support GP-engine and valve mechanism GP. Each group includes exploded illustrations with reference numbers tied directly to the parts list columns.

Lubrication, Cooling, Air Inlet and Exhaust

Lubrication System covers the engine oil pump, oil cooler, breather, oil filler, oil level gauge (dipstick), engine oil lines, turbocharger oil lines and the lubrication system protection group. Cooling System includes the water pump, water lines, water regulator, radiator GP, fan GP-blower and drain extension. Air Inlet and Exhaust System documents the aftercooler, air cleaner, cartridge GP-turbocharger, dust ejector, air lines, exhaust manifold, inlet manifold, muffler and turbocharger.

Fuel System

Fuel System pages cover the fuel filter base, fuel injection control, governor control, governor and transfer pump drive, governor fastener group, unit injector governor, governor housing, drain lines, fuel lines, fuel filter lines, fuel ratio control lines, unit injection pump, water separator, shutoff solenoid, fuel tank, check valve and solenoid valve.

Electrical and Starting System

Electrical coverage includes alarms, charging alternator, system electronic control, torque converter electronic control, electrical converter and mounting, transmission electronics, flood and head lamps, signal lamps, lighting groups, temperature sensors, ether starting aid, electric starting motor, disconnect switch, start switch, backup warning, cab wiring, engine wiring, front wiring, rear wiring, shift console wiring and steering console wiring.

Power Train

Power Train is broken into parking brake, planetary case and parts, transmission case and parts, drive chain, transmission clutch, clutch control, differential lock control, transmission control, transmission hydraulic control, torsional coupling, differential and bevel gear, differential lock, differential, power train oil filler, transmission filter, final drive, bevel gear, transmission oil lines, power train AR, transmission oil filler protection, gear pump, magnetic screen, drive shaft, input shaft, tandem and cover, tire groups, transmission AR (for serial prefixes 7LX, 4MY and 5AY), universal joint, differential lock valve and mounting, valve GP, selector and pressure control valve, solenoid valve and transmission control valve.

Frame and Body, Braking and Hydraulic System

Frame and Body includes front axle, battery box, rear bumper, case and frame, engine enclosure, front frame, radiator guard and support, bottom guard, platform guard, articulated hitch, hood and dash, grease lines, steering link, drive shaft shield and step. Braking System covers the service brake, parking brake control, service brake control, air tank and air control valve. Hydraulic System is extensive: hydraulic control, centershift lock control, steering control, ripper cylinder and lines, articulation cylinder and mounting, blade lift cylinder and mounting, blade tip cylinder and mounting, centershift cylinder and mounting, scarifier cylinder and mounting, sideshift cylinder and mounting, steering cylinder and mounting, wheel lean cylinder and mounting, circle drive, cylinder guard, centershift lock lines, hydraulic lines, pump lines, ripper lines, steering lines, centershift lock, gerotor motor, pump and mounting, metering pump, piston pump, rotating pump group, pump drive shaft, swivel, hydraulic tank and filter, hydraulic tank and mounting, pump drive universal joint, valve and linkage, bank 2/3/4/5 valves, control valve, relief valve, shuttle valve and solenoid valve.

Implements and Operator Station

Implements covers the power blade and tip AR, blade AR, blade GP, blade bracket, scarifier bracket, circle GP, drawbar GP, blade extension, blade lift, lower and upper links, ripper mounting, ripper AR, ripper GP, scarifier AR, scarifier GP and ripper tooth. Operator Station covers cab accessories, seat adjuster, cab blower and mounting, high-profile cab AR, non-ROPS cab AR, canopy AR and GP, operator console, doors, defroster fans, vandalism guard, heater and mounting, cab heater AR, seat heater, air horn, electric horn, weather insulation, cigar lighter, cab liner, heater lines, literature, cab louver, rear-view mirror, gauges, window wiper motor, cab mounting, ROPS mounting, cab panel, instrument panel, right and left panels, vandalism protection, ROPS structures, enclosed ROPS, high-profile ROPS, sun screen, seat belt, seat GP, static seat, seat support, solenoid valve, window washer, windshield washer, window, cab window, window wiper and windshield wiper. Service Equipment and Supplies covers the plate and film groups in English, French, Spanish, Portuguese and Arabic, the certification plate and the tool box group.

Part Number Index

The back of the catalog is a full numerical part number index. Every part number referenced anywhere in the book is listed alphabetically with its page number, so if you already know the number you need, you can jump straight to the illustration and consist list that contains it. This is the fastest way to verify a part number before ordering.

Why This 120H Parts Manual Belongs in Your Shop

The Caterpillar 120H is a working machine, and working machines need parts identified correctly the first time. A wrong number means a wrong part, a delayed repair and a machine sitting idle. This 120H Motor Grader parts catalog gives you the exploded views, reference numbers and serial-number breakdowns to look up a component, confirm the correct part number for your specific machine build, and order it with confidence — whether you are rebuilding a cylinder head, chasing a hydraulic leak in the circle drive, replacing a transmission clutch pack or just sourcing a replacement filter, breather or grease fitting.

Because the catalog is organized by assembly rather than by part name alone, it mirrors how a technician actually works: find the system, find the group, find the illustration, match the reference number to the parts list. Serial number ranges are printed in the captions, so you can see at a glance whether a given page applies to your PIN prefix. The Maintenance Parts Index at the front saves time on routine service items, and the Part Number Index at the back saves time when you already have a number in hand.

IMAGES PREVIEW

Delivered as an instant PDF download, this Caterpillar 120H parts manual goes straight to your phone, tablet, laptop or shop computer. No shipping, no waiting, no lost paper copy. Print the pages you need for the job, keep the rest on the device, and search the file whenever a part number has to be verified. For anyone maintaining or repairing a 120H Motor Grader, this is the reference that keeps the machine moving.