Doosan DX340LC-5, DX350LC-5 2014 Workshop Manual – Factory OEM, 1631 Pages

If you are turning wrenches on a DX340LC-5 or DX350LC-5 without the factory documentation, you are burning time and risking a come-back. I see it every week — a guy trying to get by with a third-party PDF that has the wrong torque values. That gets expensive fast. This Doosan DX340LC-5, DX350LC-5 2014 Workshop Manual is the genuine OEM document. 1631 pages of what the engineers wrote, not what some reprint house guessed.

1631 Pages: Factory Content, Not a Third-Party Reprint

This manual is the real deal — serial number 10001 and up, April 2014 edition, original instructions from Doosan. Most aftermarket reprints cut corners by omitting the Safety section or running generic torque tables. Not here. Every section from Specifications to Lower Structure and Chassis is copied straight off the factory press. You get the Notice page, the full Table of Contents, and every bookmark that matches the printed shop manual. That means you can find the hydraulic oil tank procedure under Upper Structure, Section 3, without flipping through 400 pages of unrelated content.

Safety Section: Track Excavator Maintenance Safety

The Safety chapter alone is worth the price of entry. It covers pressurized fluids — which can inject oil through your skin if you are not careful — fire and explosion prevention, electrical shock, track tension adjustments where you could get killed if the spring releases, and accumulator discharge that requires you to cycle the pilot system before touching the hydraulic lines. I’ve seen guys skip reading the accumulator procedure and blow a line off with 2000 psi behind it. That’s a mess. Read the manual. This section also includes warnings for rubber that contains fluorides, compressed air, high-pressure lines, and proper use of lighting. You don’t guess that.

Torque Values for Standard Metric Fasteners

Page 26 of this manual lists torque values for standard metric fasteners. If you are putting a final drive back together, you need that spec. I don’t care how many years you’ve been turning wrenches — you don’t memorize every torque spec for M10 and M12 bolts. This manual gives you the factory number. Use it. There is also a section for Type 8 phosphate coated hardware, hose clamps, and ORFS swivel nut torque. If you follow the spec, you won’t have a leak or a stripped thread. If you skip it, call your customer and explain the delay.

Does This Manual Cover the Fuel System and Hydraulics?

It covers every hydraulic and fuel component you can name. The table of contents shows a full section on the fuel tank and hydraulic oil tank, plus main pump, drive coupling, main control valve, swing device, fan pump, gear pump, joystick valve, travel control valve, solenoid valve, accumulator, and two pump. That is every hydraulic component you need to rebuild. The wiring? It’s in there. The assembly order? It’s in there. If you are rebuilding the travel device, it’s like working on a Manual Transmission in terms of shim selection and bearing preload.

The same principles apply to the swing device — the preload and backlash adjustments are critical. Another place where factory spec matters: the engine section. The manual covers the full engine, plus the optional coolant heater, with step order and clearances. If you pull the head without the sequence, you risk warpage. I’ve seen it.

3 Reasons to Choose OEM Documentation Over Aftermarket

First, torque values. Aftermarket manuals often use generic ranges. Doosan specifies exact Nm for each fastener on page 26. Second, safety procedures. The OEM manual has warnings about accumulator discharge, track tension, and high-pressure lines that aftermarket reprints leave out — or water down. Third, part numbers. When you need a seal or a bearing, the OEM manual gives you the Doosan part number, not some cross-reference that may or may not fit. That saves your parts guy a headache.

Operational Performance Test Procedures

If the machine is sluggish, you don’t start throwing parts at it. This manual lists operational performance tests — hydraulic cylinder cycle time, travel speed, swing speed, drift checks. You run those tests, compare to the performance standard table in the specifications section, and that tells you if the pump is tired or the control valve is sticking. No guesswork. The same logic applies to Manual Transmission diagnostics — you measure, you compare, you decide. Excavators are no different.

Frequently Asked Questions

Is this the actual factory manual?

Yes. Direct from Doosan, 2014 edition, 1631 pages.

Does it cover the engine removal procedure?

The Engine section includes disassembly, inspection, and reassembly of the engine, plus optional coolant heater. It covers timing, cylinder head torque sequence, piston ring end gap specs, and bearing clearance checks. If you are pulling the engine out of a DX350LC-5, you need the factory step order to avoid bending a valve or breaking a bolt. The manual also lists special tools required, like the cylinder liner puller and the injection timing fixture. Skipping these steps leads to immediate failure. I’ve seen it happen.

What format is the manual?

PDF download. You get the full 1631 pages as a digital file. Searchable, printable.

Can I use this for a DX300?

This manual is specific to DX340LC-5 and DX350LC-5 with serial number 10001 and up. Different machine, different specs.

Related Manuals

• Doosan DX340LC-5 DX350LC-5 Troubleshooting Manual
• Doosan Solar 340LC-V 2002 Workshop Manual – 656 Pages OEM
• Doosan DX140W, DX160W 2006 Workshop Manual – 1180 Pages

Stop wasting time on reprints. Download the Factory Manual and get the job done right.