Komatsu PC75R-2 Hydraulic Excavator Shop Manual PDF Download – Serial 22E5200001 & Up

Description

Komatsu PC75R-2 Hydraulic Excavator Shop Manual – Full Workshop PDF

This is the complete Komatsu PC75R-2 Hydraulic Excavator Shop Manual, the full workshop reference for servicing, testing, adjusting, removing, installing and rebuilding the PC75R-2 machine from serial number 22E5200001 and up. It is the same document Komatsu distributors and service workshops use to keep these compact excavators running correctly – and it is now available as an instant-download PDF.

The manual is structured into four master sections that between them cover the entire machine: Structure and Function, Testing and Adjusting, Removal and Installation, and Maintenance Standard. Everything from the engine and hydraulic pump through to the swing motor, travel motor, control valve, PPC valves, cylinders and work equipment is documented with cross-section illustrations, exploded views, hydraulic circuit diagrams, electrical diagrams and pressure/torque tables.

Because the PC75R-2 is a compact hydraulic excavator with a fully load-sensing hydraulic system, getting the correct values and procedures right is critical. This shop manual gives you the OEM pressure settings, LS differential pressures, pump delivery curves, cylinder specifications, tightening torques and adjustment procedures you need to diagnose faults accurately and repair without guesswork.

File Details

• Manual type: Shop Manual (Service & Repair)
• Brand: Komatsu
• Model: PC75R-2
• Serial number: 22E5200001 and up
• Machine type: Hydraulic Excavator
• Language: English
• Page count: 346
• File format: PDF (instant download)

Chapters Covered

• 10 Structure and Function
• 20 Testing and Adjusting
• 30 Removal and Installation
• 40 Maintenance Standard

10 – Structure and Function

This chapter explains how the PC75R-2 is built and how each system actually works, which is the foundation for correct diagnosis. It covers the power train and P.T.O., the track frame, idler and recoil spring, track roller, carrier roller and track shoe, the swing circle and swing machinery, and the full hydraulic circuit diagram in both Standard and 2-Piece Boom configurations. Component-level sections walk through the main hydraulic pump (including the PC valve, LS valve and servo piston), the 9-spool and 10-spool control valves, swing motor, center swivel joint, travel motor with parking brake and brake valve, reduction gear, work equipment cylinders, the servocontrol feed unit, accumulator, PPC valves (boom, bucket, arm, swing, blade, boom swing, 2-piece boom and travel) and the safety valves for boom, arm, blade and 2-piece boom. The overload sensor switch, solenoid valves and the three-part electrical diagram are all included.

20 – Testing and Adjusting

The testing and adjusting chapter is where the PC75R-2 shop manual becomes a working diagnostic tool. It opens with the standard technical data tables for the machine and the equipment needed for testing and fault identification, then covers measuring engine speed, adjusting valve clearance, measuring compression pressure, testing and adjusting fuel injection timing, checking and adjusting fan belt tension, adjusting accelerator lever stroke, adjusting PPC valve clearance, adjusting the safety microswitch, measuring swing circle axial clearance, and checking and adjusting track-shoe tension. Hydraulic testing and adjustment is covered in depth: air bleeding from hydraulic circuits, releasing residual pressure, checking and regulating hydraulic circuit pressures, testing and setting the main relief valves, adjusting the PC valve, measuring LS differential pressure and adjusting the LS valve, checking and adjusting servocontrol feed unit pressures, measuring pump delivery and flow control starting points for pump P1, measuring travel deviation, adjusting maximum travel motor speed, measuring travel motor internal leakage, adjusting boom and arm safety valves, adjusting 2nd boom safety valves, measuring and setting the pressure switch signal for overload operation, measuring internal leakage in the swing motor, checking for leaks inside the swivel joint and analysing the causes of hydraulic drift.

30 – Removal and Installation

This section gives the disassembly and assembly sequences for every major component group on the machine. It opens with the general precautions to be observed while working, the special tools list, and how to read the manual. It then covers the starter motor, alternator, injection pump, nozzle holder and cylinder head, before moving into the cab, engine hood, front hood, heating fan, radiator, hydraulic oil cooler, fuel tank and hydraulic oil tank. From there the manual covers engine-pump group removal and installation, pump group, engine-pump coupling joint, main pump input shaft oil seal, gear pump, swivel joint, swing motor, swing machinery, control valve and revolving frame. The undercarriage is fully documented: counterweight, swing circle, track shoes, sprocket, travel motor disassembly and assembly, ball bearing preload and axial clearance adjustment, idler and recoil spring, track roller and carrier roller. Finally the PPC valves (R.H., L.H., blade, travel and boom swing), all work equipment cylinders (boom, 2-piece boom, arm, bucket, boom swing and blade), and the full work equipment assemblies for both 1-piece and 2-piece boom versions are included.

40 – Maintenance Standard

The maintenance standard chapter provides the judgement criteria and service limits used when inspecting disassembled parts, so worn or out-of-tolerance components can be identified and replaced before they cause a comeback.

Why This Komatsu PC75R-2 Shop Manual Matters

The PC75R-2 uses a load-sensing hydraulic system with PC and LS control, electronic travel speed control, a swing brake solenoid and a mode-switching solenoid. Working on it without the correct pressure values and adjustment procedures leads to poor digging performance, overheating, drift, weak travel or damaged pumps. This manual gives you the OEM figures – main relief pressures, LS differential pressures, pump delivery curves, servo and PC valve settings, cylinder leakage limits, hydraulic drift tolerances – plus the exact sequence for testing and setting each one.

For the technician, the document supports the whole job: understanding the system before touching it, diagnosing with the correct pressures and flow values, removing and reinstalling components in the right order, disassembling and reassembling travel motors, swing machinery, control valves and cylinders, and judging whether a part is within specification or must be replaced. The cross-section illustrations, exploded views and hydraulic circuit diagrams turn complex assemblies into something you can follow step by step.

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Instant PDF Delivery

The Komatsu PC75R-2 Hydraulic Excavator Shop Manual is delivered as an instant-download PDF. There is no shipping, no waiting for a disk, and no restriction on the device you use – open it on a laptop in the workshop, a tablet next to the machine, or print the pages you need for the job and keep them on the bench. Because it is a PDF, you can zoom into the circuit diagrams and cross-sections, keep the whole manual on a USB stick, and search the document for the model number, pressure value or procedure you need.

Whether you are servicing the hydraulic pump, setting the LS valve, replacing a travel motor seal, repairing a boom cylinder, adjusting track tension or tracking down an electrical fault, having the complete PC75R-2 shop manual on hand gives you the same reference material the professionals use.