Description

Tadano GR-500EX-2 Service Manual

I have seen more than a few rough terrain cranes get knocked out of service because someone guessed the pilot pressure or skipped the air bleed on a Tadano GR-500EX-2 Service Manual. A crane that costs this much doesn’t get fixed with aftermarket guesswork. This is the factory manual – 158 pages of what Tadano actually wants you to do inside their GR-500EX-2. That spec number on the nameplate? It’s 540626 and up, and this manual covers it. No third-party interpretation.

You walk out to a GR-500EX-2 that won’t telescope, or the winch brake drags. Where do you start? The manual’s Y-section – specifically Y-1 Service Data – gives you the oil and coolant amounts, operating speeds, and the hydraulic device specs including the pump, motor, and cylinder data. If you have ever had a cylinder drift on a lift because you used the wrong rod seal, you know why this matters. The factory numbers are right there.

Hydraulic Cylinder and Air Bleeding Procedures

Bleeding air out of a Tadano crane system is not a job you want to guess at. The manual dedicates Y-4 to Air Bleeding Procedure, covering the main pump, steering/winch brake pilot pump, swing motor, winch motor, counterbalance valves, and the jib lock pin cylinder. There is a specific sequence for bleeding the winch brake and the service brake. Doing it out of order can leave trapped air that shows up as a dead pedal. The manual also shows the tank pressurization tool procedure – that one tool saves hours of prime time if you use it right.

Hydraulic pressure adjustments are in Y-2 (Hydraulic Pressure) and Y-3 (Pneumatic Pressure). Each function – winch, telescoping, elevating, steering, swing, outrigger – has its own specified pressure. You want the lower pilot pressure? It’s in the table. Torque converter oil pressure? Same table. No calling the dealer for a number that should have been on your bench.

7 Systems Covered in the Y-Section

The manual groups everything under the Y chapter: Service Data, Pressure Adjustments, Air Bleeding, Electric Adjustments, Assembly Adjustments (both crane operation and traveling device), and Operation Checks. That is seven distinct systems within 158 pages. Each one is laid out with the check steps in order. The electric adjustment section (Y-5) covers the boom full retraction detection switch, jib stowed switch, winch drum rotation sensors, over-front detection, and wire rope run-out detectors. These are the switches that stop the crane from wrecking itself – and they have to be adjusted to spec.

Does This Manual Cover the AML-C System?

Yes, but indirectly. The manual references the Automatic Moment Limiter (AML-C) as a separate service manual (publication No. W301-0431E). This manual covers the interaction of the AML-C with the crane’s control systems, but detailed AML-C repair is in that separate book. So if your AML-C is throwing errors, you need both. Same for the Multiplex Data Transmitter (MDT-9) and the torque converter (EXEDY) – this manual gives the adjustment data and operation checks, but the rebuild specs are in those separate publications. The manual is honest about that up front.

Assembly Adjustments for Traveling Device

A crane that doesn’t stop is a lawsuit waiting. Y-7 covers the service brake pedal adjustment, parking brake linkage, steering angle, tire pressure (23.5 × 25 – 32PR), and the torque converter/transmission oil fill procedure. There is a whole subsection on retightening hub nuts – the sequence and torque are critical. You also get the accelerator pedal adjustment and the engine governor setting for the MITSUBISHI 6M60-TL engine. If you have ever had a crane creep on a grade because the parking brake was out of stroke, you will appreciate the exact rod-end adjustment procedure on Y-7. Check Manual Transmission for general theory, but the Tadano numbers are right here.

Why Original OEM Documentation Matters

I have seen aftermarket manuals that claim to cover the GR-500EX-2 but leave out the jib offset cylinder bleed procedure or give wrong switch pinouts. This is a Tadano factory publication – same print you would get from the dealer, but you own it. The serial number range is printed on page 2, the group index is on page 4, and the contents list every Y-section with page references. If you are working on a GR-500E-2 GR-500EX-2 2012, the TADANO GR-500E-2 GR-500EX-2 2012 Operators Manual complements this repair manual. For the larger model, get the Tadano GR-700EX-1 Service Manual – 306-Page Factory Repair Manual. And if you are training a new tech on the older AR series, the TADANO AR300 Shop Manual covers that platform.

Transmission work on a crane is not the same as a pickup truck. The EXEDY torque converter and transmission have specific max speed and oil type requirements – you will find them under Y-7 section 6. The manual also teaches you how to adjust the headlight aiming on a machine that is never on a level lot. For deeper drivetrain knowledge, the Manual Transmission article on basic gearing theory will help, but always come back to the Tadano specs for assembly.

What serial numbers does this manual cover?

Applicable serial number 540626 and up, for spec GR-500E-2-00102.

Does this manual include circuit diagrams?

Yes – this manual is titled Service Manual (Circuit Diagrams and Data) and includes the Z chapter for system diagrams. However, the separate service manual for AML-C (W301-0431E) has the detailed AML wiring. The main hydraulic and electric circuit diagrams are included for the crane overall functions, winch, telescoping, elevating, and outrigger circuits. You need both this manual and the AML-C manual for full electrical troubleshooting.

Can I use this for the Tadano GR-500E-2 (without EX)?

Yes – the manual covers both GR-500E-2 and GR-500EX-2 in the same publication. Check the spec number on the nameplate to confirm.

How many pages is the manual?

158 pages.

Access the Factory Manual. Print the pages you need for the job. Keep the rest on your shop tablet. When a GR-500EX-2 shows up with a dead outrigger or a boom that drifts, you will have the bleed sequence, the pressure chart, and the switch adjustment procedure without calling anyone. That’s the whole point.