Description

Terex TA350, TA400 2012 Operators Manual

If you’re running a Terex TA350, TA400 2012 Operators Manual on a jobsite and you don’t have the factory operator handbook, you’re flying blind. I’ve seen guys try to guess the pre-start sequence on these dumptrucks and end up with a burned-out starter or worse. This 169-page 2012 manual is the one that came with the machine from Terex. Not a reprint, not a third-party compilation. Original OEM. This is what the techs at Terex Equipment Limited wrote for the operator to keep on the seat box.

Safety Warnings (OHE975ec): Non-Negotiable Reading

The manual opens with a dedicated warnings section—OHE975ec—that covers decal locations, crushing hazards, and fluid handling precautions. Page 5 of the PDF states this is the original operating instruction that must remain with the vehicle at all times. If you skip this section, you’re ignoring the manufacturer’s own risk assessment. I’ve pulled burnt rigs out of the field because someone bypassed the lockout procedure listed here. Don’t be that guy.

OHE9751 – Controls and Instrumentation Walkthrough

This chapter labels every lever, gauge, and indicator on the TA350 and TA400. Need to know what the amber light on the transmission panel means? It’s in OHE9751. The manual uses line drawings with callouts—no guesswork. If you’re training a new operator, hand them this section before they touch the key. It covers the throttle lock, dump body controls, and the retarder system. That last one kills transmissions on these trucks if misused.

OHE9753 – Daily Checks and Fluid Levels

Every morning, before the engine fires, you run through the checks in OHE9753. Engine oil dipstick, hydraulic tank sight glass, coolant level, and wheel nut torque. The OEM specification for wheel nut torque is listed right here—don’t trust an aftermarket chart. Use a calibrated torque wrench, not your arm. The manual also tells you which hydraulic oil to use; stick to the OEM recommended viscosity or you’ll be replacing pumps.

Torque Specs and Fluid Capacities: Where to Find Them

This operator manual includes critical torque values for wheel nuts and drain plugs, along with fluid capacities for the cooling system, engine oil, and hydraulic tank. It’s not a service manual, but for daily operation it has the numbers you need to avoid overfilling or undertorquing. I’ve seen TA400s leak from a loose filter housing because the operator grabbed a generic spec. Don’t rely on memory—use the original data.

Why the OEM Warnings Section Is Non-Negotiable

The “warnings” bookmark contains the original safety instructions from Terex Equipment Limited. It covers overhead power line clearance, tire explosion risks, and proper chocking procedures. Aftermarket reprints often strip these pages because they’re “just warnings.” That’s how someone gets killed. This manual keeps them intact. If you’re running a TA350 on a slope, check the slope operation limits in this section.

For deeper maintenance, pair this operator handbook with the Terex TA350 TA400 Maintenance Manual. If you need an older reference, the TEREX TA350/400 Operator Handbook Owner Manual 2009 covers earlier Tier 2 machines. And for a later revision, the TEREX TA400 2011 Operations Manual is also available. For transmission basics, see Manual Transmission operation on Wikipedia; for clutch adjustment, Manual Transmission fundamentals apply.

FAQ

Does this manual cover service intervals and filter changes?

No. It covers daily checks and fluid levels, but not full service schedules. Those are in the maintenance manual.

What should I do if my TA350 has a warning light not described in the manual?

Check the diagnostic section of the maintenance manual first. If the light is for the aftertreatment system, this operator manual covers the basic regeneration procedure on page 73. If it persists, contact Terex customer support using the number on the re-order page. Do not bypass the system—you can damage the DPF. The manual gives the correct reset sequence, so follow it exactly. If you can’t find the fault, you likely have a sensor issue that requires the diagnostic tool. This operator book won’t help you there; get the service manual.

This is the factory operator handbook that should live in the cab of every TA350 and TA400. It’s 169 pages, correct for 2012, and contains the original Terex safety warnings and control diagrams. Don’t run a multi-ton dumptruck without it. Access the Factory Manual from AutoRepairManuals and keep your crew safe.