Description

Komatsu BR350JG-1 2001 Workshop Manual – Factory Specifications You Can Trust

If you’re wrenching on a Komatsu BR350JG-1 and guessing torque values, you’re asking for a cracked block or a hydraulic line that blows off at the worst time. I’ve seen both. This 2001 Workshop Manual is what Komatsu gave their own techs. 454 pages of factory procedure, not aftermarket interpretations. Aftermarket manuals copy what they think is close enough — and close enough gets you a comeback job or a safety incident. This one is the real print.

Standard Tightening Torque – Why You Need the Factory Numbers

Every bolt on this machine has a specific torque, and the Foreword of this manual gives you the entire Standard Tightening Torque table. It covers bolt diameter, pitch, and material grade. I don’t care if you’ve torqued a thousand head bolts — you don’t know the spec for a Komatsu crusher frame without this page. The table also includes electric wire code and conversion factors. Without these numbers, you’re working blind. The manual spells it out: tightening torque for every threaded fastener on the BR350JG-1.

Does This Manual Cover the SA6D102E-1 Engine?

Yes. The BR350JG-1 mounts the SA6D102E-1 engine, and Section 10 (Structure and Function) details all engine-related parts, including the radiator, oil cooler, and engine control system. Section 20 (Testing and Adjusting) gives you the full engine troubleshooting suite — S-1 through S-16 — covering poor starting, no start, lack of power, black smoke, oil consumption, overheating, and more. If you need compression pressure specs, valve clearance adjustment, or injection timing, it’s in Section 20.

Hydraulic Pressure Testing – PC Valve and Control Circuit

The hydraulic circuit on this crusher is complex. Section 20 includes testing and adjusting for PC valve output pressure, control circuit oil pressure, and solenoid valve output. You get the exact procedure for measuring control circuit oil pressure when self pressure is reduced. The manual lists the required tools for testing and adjusting — you’ll know which gauge and adapter to use before you start. No guesswork. Bleeding air from the hydraulic circuit is also covered step by step.

Jaw Crusher Adjustments and Wear Checks

Section 20 includes a dedicated subsection for the jaw crusher. You get the method for adjusting the outlet clearance (for machines with double-acting cylinder) and a procedure for checking wear of main wear parts. This is not generic advice — it’s Komatsu’s own factory procedure. If you skip this, you’ll run the crusher with an incorrect gap and destroy the jaw dies or overload the motor. The manual tells you exactly which measurements to take and what tools to use.

454 Pages of Factory Data – What You Get

This manual is organized into five main sections: General (01) with dimensions, specifications, weight table, and capacities; Structure and Function (10) covering power train, hydraulic piping, electric circuits, feeder automatic control, and crusher; Testing and Adjusting (20) with standard value tables for engine, chassis, electrical parts, and full troubleshooting charts; Maintenance Standard (40); and Others (90). You also get the complete wiring diagram and connector arrangement diagrams. If you need to know the oil capacity in quarts, the conversion table in the Foreword has it.

Troubleshooting the S-Mode: 16 Symptom Charts for Engine Problems

Section 20 includes a massive troubleshooting section for the engine (S mode) with 16 symptom charts — from S-1 (poor starting) to S-16 (excessive vibration). Each chart walks you through a logical sequence: check this connector, measure that pressure, test this sensor. The manual includes connector types and mounting locations, a connector arrangement diagram, and a pin-number connection table. If you’ve got a no-start condition, you’ll go straight to S-2 and follow the decision tree — no random parts swapping.

I’ve seen techs waste hours chasing an electrical gremlin because they didn’t have the factory wiring diagram. This manual has the complete electric circuit diagram and input/output system structure diagram. You can trace the signal from the engine speed sensor to the controller. That’s the difference between being done in an hour and still scratching your head at quitting time.

If you need an operators-level reference, check the Komatsu BR350JG-1 1998 Operators Manual – OEM Factory Specs. For other Komatsu models, the Komatsu WA65-5 WA70-5 WA80-5 2005 Workshop Manual and Komatsu WH609-1E0 WH613-1E0 WH713-1E0 WH714H-1E0 WH716-1E0 Workshop Manual are also available. For a refresher on the basics of a Manual Transmission as it applies to track drive systems, check the linked resource. Understanding the fundamentals of a Manual Transmission can help when diagnosing travel motor issues, but this manual gives you the Komatsu-specific diagrams and pressures.

Does this manual cover the SA6D102E-1 engine?

Yes. See section 10 for parts and section 20 for all testing procedures.

What torque values are included?

The Foreword contains a Standard Tightening Torque table that lists tightening torque for bolts and nuts by size and material grade. It covers the entire machine including the engine, hydraulic components, and crusher. This is not generic torque – it’s Komatsu’s own spec for every fastener on the BR350JG-1. Without this, you risk stripping threads or causing joint failure. The manual also includes a conversion table for units.

Is this suitable for a home garage mechanic?

Yes, if you can follow a factory manual. It assumes you have basic tools and knowledge, but it walks you through every adjustment and test procedure step by step. The troubleshooting charts are especially helpful for beginners because they guide you through logical diagnostic steps.

How do I adjust the valve clearance?

Section 20 covers adjusting valve clearance. You need the standard value table for engine and a feeler gauge. Komatsu specifies cold clearance. The manual gives the exact procedure including which bolts to loosen and the proper sequence.

You don’t need to wonder if the spec is right. This is the factory manual – printed by Komatsu, revised as needed, and delivered to dealerships. Access the Factory Manual and keep it on your tablet or printed in the shop. It will pay for itself the first time you avoid a torn gasket or a misadjusted crusher gap.