Komatsu BR350JG-1 1998 Operators Manual

If you own a Komatsu BR350JG-1 1998 Operators Manual? No — if you own the Komatsu BR350JG-1 mobile crusher, you need the actual factory manual. I’ve pulled apart enough Komatsu machines to know that guessing on startup procedures or safety locks costs you a shift and a lot of money. This is the 1998 Operators Manual, 223 pages of what Komatsu themselves printed. It covers everything from the engine start sequence to the jaw crusher running-in procedure. Don’t let a reprint or scanned copy fool you — OEM is the only way to get the exact torque specs and safety warnings that match your serial number range (1005 and up).

7 Safety Sections That Cover Your Tail

Section 7.3 (CRUSHER OPERATIONS) is the one most guys skip. Don’t. It details what happens if you run the crusher with the wrong material or jam it. Section 7.5 covers battery handling — dead battery jump-start procedures are in there. Section 9 shows where every safety label goes. That matters if you’re replacing labels after a repaint. The manual walks you through general precautions (Section 6) and maintenance precautions (Section 8) that apply to every job. Transport safety (Section 7.4) includes loading and fixing methods from Section 13. You’ll also find towing guidelines (Section 7.6) that reference principles similar to those for a Manual Transmission vehicle — same load distribution logic.

Operation: From Engine Start to Crusher Shutdown

Section 12 is the core of this manual. You start with Section 12.1 — checks before starting the engine. Then Section 12.2 tells you the exact starting protocol. Too many operators jump straight to crushing without letting the machine warm up. Section 12.3 lays out operations and checks after starting. Moving off (Section 12.4) and steering (Section 12.5) are covered in plain steps. Crusher operation (Section 12.7) includes the water sprinkler controls (Section 12.8) and the critical running-in procedure in Section 12.14. That section alone — running in the jaw crusher — prevents premature wear on the jaw plates. If you’ve ever replaced a set of jaws early, you know that’s worth the price of this manual. Section 12.15 gives precautions for using the jaw crusher, and Section 12.16 shows efficient use. For travel, Section 12.19 covers hills — both up and down. The operation section also details the travel controls, including the Manual Transmission shift pattern if your machine is equipped with a manual gearbox.

Torque Specs and Maintenance Intervals

Section 22 gives standard tightening torques for bolts and nuts. That torque list (Section 22.3) includes values for common fasteners on the crusher and undercarriage. If you’re working on the crusher itself, you’ll also need the tools listed in Section 22.2 — attached tools that come with the jaw crusher. Section 21 tells you which fuel, coolant, and lubricant grades to use based on ambient temperature. The maintenance schedule (Section 24) breaks down service intervals from initial 250 hours all the way to 4000 hours. Every 100-hour service (Section 25.4) includes checks you can do yourself. Section 23 lists safety-critical parts that must be replaced on a schedule. For a different model, the Komatsu WD900-3 2004 Operators Manual – Factory OEM Specs uses the same interval format, but this manual is specific to the BR350JG-1.

Check the Wear Parts List – Section 20

This manual lists wear parts for three areas: body (Section 20.1), jaw crusher (Section 20.2), and primary belt conveyor (Section 20.3). If you’re ordering replacement parts, you need the exact Komatsu part numbers from these tables. Aftermarket equivalents might fit, but the dimensions and material specs are documented in Section 20. Don’t guess — look it up. Other Komatsu manuals like Komatsu WH609-1E0 – WH716-1E0 Operators Manual | 272 Pages OEM follow the same standard for wear parts listing.

Who Needs This Operators Manual?

Anyone who operates the BR350JG-1. That includes owners who do their own daily maintenance, site supervisors training new operators, and rental fleet managers who need to ensure safe transport. It’s not a workshop manual — it doesn’t contain full engine rebuild procedures. But it gives you the daily, weekly, and periodic checks that keep a mobile crusher running. If you’re a DIY mechanic who maintains heavy equipment, this is the first document you should have on your tablet or in the toolbox.

Don’t operate without it.

Does this manual cover the engine?

Yes. Section 12.2 covers starting the engine and checks after starting.

What torque values are in this manual?

Section 22 includes standard tightening torques for bolts and nuts used on the machine. That section also lists the tools attached to the jaw crusher. But this is an operator’s manual, not a service manual. For full engine rebuild torque specs, you’d want the Komatsu BR350JG-1 2001 Workshop Manual. This one covers the basic fasteners you need to check during daily maintenance.

Stop trusting someone else’s photocopy. Get the real factory specifications straight from Komatsu. Download the Factory Manual.