Komatsu PC27MRX-1 PC30MRX-1 PC35MRX-1 PC40MRX-1 PC45MRX-1 Shop Manual PDF

Description

Komatsu PC27MRX-1 PC30MRX-1 PC35MRX-1 PC40MRX-1 PC45MRX-1 Shop Manual

This is the full Komatsu shop manual for the PC27MRX-1, PC30MRX-1, PC35MRX-1, PC40MRX-1 and PC45MRX-1 mini excavators. The PDF runs to 947 pages and follows Komatsu’s standard shop manual format: General, Structure and Function, Testing and Adjusting, Disassembly and Assembly, Maintenance Standard, and Others (hydraulic and electrical circuit diagrams). It is written for service technicians working on these machines in a workshop, covering the full machine, not just a single system.

File Details

• Manual type: Shop / Service Manual
• Brand: Komatsu
• Models covered: PC27MRX-1, PC30MRX-1, PC35MRX-1, PC40MRX-1, PC45MRX-1
• Document number: SEBM016808
• Language: English
• Page count: 947
• File format: PDF

Chapters Covered

The Komatsu PC27MRX-1 / PC30MRX-1 / PC35MRX-1 / PC40MRX-1 / PC45MRX-1 shop manual is organised into the following chapters, each of which is broken down into the main component groups:

• 01 GENERAL — General assembly drawings, specifications, weight tables, list of lubricant and water.
• 10 STRUCTURE AND FUNCTION — Engine control, radiator and oil cooler, swing circle, swing machinery, undercarriage, hydraulic tank, CLSS hydraulic system, valve control (CLSS, LS bypass, pressure compensation, travel junction, travel merge-divider, unload valve, self pressure reducing valve, logic valve, swing pressure selector valve), hydraulic pump (LPV30 series and LPD25+25 series), swing motor, travel motor, control valve.
• 20 TESTING AND ADJUSTING — Standard value tables for engine-related and chassis-related parts, testing and adjusting procedures, troubleshooting charts.
• 30 DISASSEMBLY AND ASSEMBLY — Removal and installation of engine and main pump assembly, damper, center swivel joint, travel motor, sprocket, swing motor and swing machinery, revolving frame, swing circle, idler, recoil spring, track roller, carrier roller, track shoe, hydraulic tank, fuel tank, main pump, gear pump, PPC pump, control valve, PPC valve, boom/arm/bucket/swing/blade cylinders, work equipment, bucket, arm, swing bracket, blade, seat bracket, solenoid valve, heater, floor frame, canopy, operator’s cab, counterweight. Also component-level disassembly and assembly with tightening torques and coating specifications.
• 40 MAINTENANCE STANDARD — Judgment standards for inspection of disassembled parts: swing machinery, swing circle, undercarriage (idler, recoil spring, track roller, carrier roller, sprocket, track shoe), hydraulic pump, control valve, swing motor, travel motor, PPC valve, swivel joint, hydraulic cylinders, work equipment bushings and pins, bucket.
• 90 OTHERS — Hydraulic circuit diagrams and electrical circuit diagrams for each model and specification (canopy and cab, standard and EU/USA specification), plus air conditioner electrical circuit diagram.

Models and Engines Covered in This Manual

The manual spans five mini excavator models and several engine variants. Engine sections refer to the 68E-88E Series Engine Shop Manual for engine details, so this volume is the chassis-side reference:

• PC27MRX-1 (Serial No. 11574 and up) — 3D82AE-3 engine
• PC30MRX-1 (Serial No. 10001 and up) — 3D84E-3 engine family
• PC35MRX-1 (Serial No. 3930 and up) — 3D84E-3 engine family
• PC40MRX-1 (Serial No. 1001 and up; from 5501 and up different engine and control valve configuration) — 4D84E-3 / 4D88E-3 engine family
• PC45MRX-1 (Serial No. 1001 and up; from 3001 and up different engine and control valve configuration) — 4D84E-3 / 4D88E-3 engine family

Note: in some drawings the model name is written as PC27MR, PC30MR, PC35MR, PC40MR and PC45MR. These names refer to the same machines as PC27MRX, PC30MRX, PC35MRX, PC40MRX and PC45MRX.

What the Komatsu PC27MRX-1 PC30MRX-1 PC35MRX-1 PC40MRX-1 PC45MRX-1 Shop Manual Gives You

This is not a quick-reference leaflet. It is the workshop reference for these five mini excavators, covering the closed-centre load-sensing hydraulic system (CLSS), the LPV and LPD series piston pumps, the control valve blocks including pressure compensation valves and unload valves, the travel junction and merge-divider circuits, the swing and travel motors with reduction gears, the swivel joint, and the full undercarriage. Each assembly procedure is accompanied by the tightening torques, coating materials (adhesives, gasket sealants, greases) and clearance or preload values that the job requires.

The Testing and Adjusting chapter supplies standard value tables for engine speed, compression pressure, blow-by pressure, oil pressure, fuel injection timing, fan belt tension, spool strokes, control lever travels, work equipment speeds and relief pressures. The Maintenance Standard chapter supplies the wear limits for bushes, pins, sprocket teeth, track link components, idler and roller treads, and the backlash values for the swing machinery and swing circle. The Others chapter closes the manual with hydraulic and electrical circuit diagrams covering the different specifications and serial number ranges.

Who This Komatsu Shop Manual Is For

This Komatsu PC27MRX-1, PC30MRX-1, PC35MRX-1, PC40MRX-1 and PC45MRX-1 shop manual suits independent workshops, owners who service their own machines, and technicians who need the manufacturer’s procedures and figures rather than generic advice. It covers the jobs you actually meet: diagnosing a slow or weak circuit, pulling and resealing a cylinder, removing and rebuilding the swing motor or travel motor, adjusting the track shoe tension, setting relief pressures, checking spool strokes, and confirming whether a worn part is within limits or due for replacement. Because the manual lists serial number ranges and separate specifications for early and later machines, it also helps you match the right procedure and values to the machine in front of you.

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Instant PDF Delivery

The manual is delivered as a PDF immediately after payment. No shipping, no waiting for a disc in the post. You can open it on a laptop, tablet or phone in the workshop, print only the pages you need for the job, and keep the rest on file. Having the correct torque figures, wear limits and assembly order on hand is the difference between a repair that lasts and one that comes back — and with this manual on your device, the correct Komatsu procedure for the PC27MRX-1, PC30MRX-1, PC35MRX-1, PC40MRX-1 or PC45MRX-1 is never more than a search away.