Description

Terex TA25, TA27 Operators Manual

If you’re running a TA25 or TA27 and you don’t have the factory manual on the bench, you’re guessing. Guessing on a 20-ton articulated dump truck costs time and body parts. I’ve seen it. The Terex TA25, TA27 Operators Manual is the document Terex writes for the operator—not some aftermarket rewrite that tells you to “use common sense.” This is 134 pages of the actual spec, from Motherwell, Scotland. Part number 15274234, Ref OHE 805 Rev 1, dated September 2002. If you want to know how the machine was designed to be run, this is it.

Operation, Safety, and Maintenance Coverage

Three sections cover the whole machine. Operation tells you what levers do and why a certain gear holds on a grade. Safety warns about diesel exhaust (Prop 65 on page 5) and battery lead exposure. Maintenance gives intervals for fluids, filters, and pivot points. You get the OEM sequence, not a generic checklist. The manual says “Only trained personnel should be allowed to operate this vehicle” on page 3. That’s your first warning—respect it.

What Does This 134-Page Manual Include?

Page 1 is the title page. Page 2 has the part number and contact for Terex Equipment Limited in Scotland. The rest is step-by-step procedures for daily checks, lubrication, tire pressure, brake bleed, transmission shift patterns, and coupler operation. No theory. Just “do this, then that, with this torque.” You want the torque for the wheel nuts? It’s in the maintenance section. You want the correct hydraulic oil? It’s listed by viscosity grade. This is not a manual you read once; it’s the one you keep in the cab with greasy fingerprints.

134 Pages of Factory Specs

I’ve seen guys chase a driveline vibration for half a shift because they used a generic U-joint spec. With this manual, you pull the OEM part number and torque value. 134 pages means every system gets room for detail—engine shutdown sequence, dump body operation, parking brake adjustment, and electrical disconnects. The o-ring part numbers are there too. You don’t guess. You look it up.

Get the Right Torque Specs – Page 2

The reorder part number is on page 2. That tells you this manual is tracked by Terex. It’s not a photocopy of a photocopy. If you need replacement pages, you order by that number. The torque tables follow later in the maintenance chapter. I won’t list them here because you need to read the context—bolt grade, lubrication, angle tightening. That’s what the manual gives you. Don’t shortcut it.

Prop 65 Warning: Understand the Labeling

Page 5 has the California Proposition 65 warnings for diesel exhaust and battery lead. This is legal text, but it also tells you what chemicals you’re dealing with. If you operate in California, you need to post the same warning on the machine. The manual includes the exact wording. Copy it. Done.

Before you grab a generic pdf off some forum, remember: the TA25 and TA27 share this manual. Both are articulated dump trucks with direct drive transmissions. The TEREX TA25 TA27 TA30 TA35 TA40 Glass Parts Catalog covers glass if you bust a windshield. For the exact wiring or part numbers, get the TEREX TA25 TA27 Operators Manual itself—you’re already here. Need the full parts breakdown? Check the TEREX TA25 TA27 2000 Parts Catalog.

Transmission work? The TA25 uses a Manual Transmission with a specific shift pattern; the TA27 is similar. For general theory on how manual boxes work, read up on Manual Transmission at Wikipedia—but don’t apply that to your Terex without the factory procedure.

Q: Does this manual cover the TA30 or larger models?

No. Only TA25 and TA27. The TA30 has a different drivetrain and requires its own manual.

Q: Where do I find the hydraulic oil change interval?

Check the maintenance schedule in the middle of the manual. It lists intervals in hours and calendar time, with the oil grade spec. Terex calls for a specific viscosity based on ambient temperature—don’t use universal “hydraulic oil” without matching that spec. Page 2 has the part number for ordering replacement manuals; the maintenance section starts around page 50. Follow the table exactly, including the filter part numbers. If you skip a filter change, you’ll starve the pump. I’ve seen it.

You need this on your bench or in the cab. The Terex factory wrote it so the operator can keep the machine running without a service advisor on speed dial. Access the Factory Manual now and stop borrowing someone else’s half-legible copy.