Komatsu PC35MR-2 & PC50MR-2 Mini Excavator Shop Manual PDF – Complete Workshop Service & Repair Guide

Description

Komatsu PC35MR-2 & PC50MR-2 Shop Manual – Complete PDF Workshop Guide

This is the full Komatsu PC35MR-2 and PC50MR-2 mini excavator shop manual, published by Komatsu under document number YCBM032404-1. It is the same comprehensive workshop reference used by technicians to service, diagnose, repair, and overhaul both machines, covering serial numbers 5001 and up. The manual spans 488 pages across five core chapters, from general specifications right through to complete disassembly and assembly procedures, hydraulic circuit diagrams and electrical schematics.

The PC35MR-2 is powered by the Komatsu 3D88E-5P diesel engine and the PC50MR-2 by the 4D88E-5X. This manual treats both machines together and calls out model-specific values, torques, clearances and component differences wherever the two diverge. Whether you are running a compact excavation business, maintaining a fleet, or repairing a machine for resale, this PDF shop manual gives you the specifications, procedures and adjustments required to do the job correctly.

File Details

• Manual type: Shop Manual (Service / Workshop)
• Brand: Komatsu
• Models covered: PC35MR-2, PC50MR-2
• Engines covered: 3D88E-5P (PC35MR-2), 4D88E-5X (PC50MR-2)
• Serial numbers: 5001 and up
• Document number: YCBM032404-1
• Edition / revision date: 2004-10 (3rd revision)
• Language: English
• Page count: 488
• File format: PDF

Chapters Covered

The manual is organised into the following top-level sections:

• 01 GENERAL
• 10 STRUCTURE, FUNCTION AND MAINTENANCE STANDARD
• 20 TESTING AND ADJUSTING
• 30 DISASSEMBLY AND ASSEMBLY
• 90 OTHERS

01 GENERAL

Opens with the specification dimension drawing and working range drawing for both the PC35MR-2 and PC50MR-2, so you can quickly confirm overall length, height, width, shoe width, tail swing radius, track length, tumbler centre distance, ground clearance and travel speeds. Machine specifications, cab and canopy variants, X-weightless figures, weight tables by component, and the lubricants, fuel and coolant specification chart (including ambient temperature ranges and capacities for engine oil, final drive, hydraulic system, fuel tank, grease and cooling system) are all included in this chapter.

10 STRUCTURE, FUNCTION AND MAINTENANCE STANDARD

This is the technical heart of the manual. It walks through the cooling system, swing circle, swing machinery, undercarriage, idler, track frame, carrier roller, track roller, sprocket, track shoe, road liner and triple grouser shoe with dimensional checks, wear limits and remedies. Travel motor, swing motor, hydraulic cylinder, control valve, CLSS, logic valve, PPC valve, swing and blade valve, solenoid valves, electric control system, monitor system and sensors are each covered with cutaway illustrations, operation descriptions and check items. Detailed tables give standard clearances, tolerances and repair limits for the swing circle bearing, swing machinery gear backlash, recoil spring free length and load, track roller tread, sprocket root/tip diameter, and track shoe wear.

20 TESTING AND ADJUSTING

Standard value tables for engine and chassis related parts give measurement conditions, standard values for a new machine and service limit values. Procedures include measuring engine speed, exhaust gas colour, adjusting valve clearance, measuring compression pressure, engine oil pressure, fuel injection timing, alternator and air conditioner belt tension, and adjusting the fuel control lever. On the chassis side, you get sprocket wear, track shoe tension, swing circle bearing clearance, oil pressures in the work equipment, travel, boom swing, swing and blade circuits, LS differential pressure, PC valve adjustment, control circuit oil pressure, solenoid valve output pressure, PPC valve output pressure and adjustment, swing holding brake release pressure, travel deviation, oil leakage from work equipment cylinders, air bleeding from each part, residual pressure release and hydraulic tank pressurisation. The troubleshooting sections are split into E-mode (electrical), H-mode (hydraulic and mechanical), M-mode (monitor panel) and S-mode (engine), with full diagnostic tables, suspected causes and standard values.

30 DISASSEMBLY AND ASSEMBLY

Step-by-step removal, installation, disassembly and assembly procedures with special tool lists, torque values, sealant and adhesive call-outs, and safety notes. Covered assemblies include the radiator and hydraulic oil cooler, engine and hydraulic pump, track shoe, idler, recoil spring, track roller, carrier roller, centre swivel joint, floor frame, swing motor, swing machinery, work equipment, revolving frame, swing circle, control valve, hydraulic cylinder and air conditioner unit. Each section identifies which special tools cannot be substituted and which can be replaced with commercial equivalents.

90 OTHERS

Contains the hydraulic circuit diagrams for the PC35MR-2 and PC50MR-2, the additional attachment circuit diagram for the PC50MR-2, and the complete electrical circuit diagrams for both machines, split across two sheets each.

Why This Komatsu PC35MR-2 & PC50MR-2 Shop Manual Matters

Compact excavators like the PC35MR-2 and PC50MR-2 live on tight job sites where downtime is expensive. Having the correct torque figure, backlash limit or relief pressure on hand means the difference between a repair that lasts and one that comes back. This manual gives you the manufacturer’s own procedures, not generic advice. You can set the main relief valve with confidence, adjust the LS differential pressure, diagnose a travel deviation, check the swing circle bearing clearance, or rebuild a hydraulic cylinder with the exact piston nut torque and cylinder head torque specified for each model. The troubleshooting flowcharts help you work from symptom to root cause without pulling the machine apart unnecessarily.

Because both models share a single shop manual, independent operators running one of each – or workshops servicing mixed fleets – get everything in one file. The disassembly and assembly chapter is written so that a competent mechanic can strip and rebuild major assemblies in the correct order, with the right sealants, greases and lock compounds noted at each step.

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Instant PDF Delivery

This Komatsu PC35MR-2 PC50MR-2 shop manual is delivered as a downloadable PDF the moment your order is complete. There is no shipping, no waiting for a physical book, and no risk of a damaged or lost parcel. The file opens on any PDF reader – laptop, desktop, tablet or smartphone – so you can pull it up in the workshop, print the pages you need for the job, or keep the whole manual on a USB stick in the tool cabinet. Search, zoom and print as often as you like, on as many of your own devices as you need.