Description

Fendt 922 Vario COM III, 924 Vario COM III, 927 Vario COM III, 930 Vario COM III, 933 Vario COM III 2007 Workshop Manual

You’ve got a Fendt 900 Vario COM III in the bay with a ghost in the electrical system. Maybe the transmission control won’t talk to the CAN bus, or the front PTO speed sensor is giving you a reading that doesn’t match anything. You can burn billable hours chasing a wiring diagram from a third-party source that’s got the wrong pinout. I’ve been there. That’s why I reach for the Fendt 922 Vario COM III, 924 Vario COM III, 927 Vario COM III, 930 Vario COM III, 933 Vario COM III 2007 Workshop Manual – 1267 pages of factory documentation that AGCO GmbH printed for their own training department. This isn’t a reprint of a reprint. It’s the original OEM file, and it treats the electrical system, transmission, and hydraulics the way they should be treated: with exact values.

Electrical System Diagnostics: 23 Pages of Circuit Diagrams

The manual opens the 9000 section with 23 individual circuit diagrams covering everything from the electronics supply (page 2) to the immobiliser and MoDaSys (page 23). Each diagram is keyed to the Fendt 900 Vario COM III harness layout. Need to trace the CAN bus for transmission control? Look at page 5. The wire colors, connector pin numbers, and earth points are all there. I’ve used these diagrams to find a broken ground in the A050 ECU that was causing intermittent hydraulics lockout. If you’re pulling your hair out over a no-start or a phantom fault, start here. The manual also includes a full fuse assignment chart and an overview of electrical components – every relay, every sensor location is mapped.

Transmission Control and CAN Bus: Pin-Level Data

The A050 ECU – basic control unit – gets its own multi-page breakdown in section E. You’ll find pin assignments for the Vario transmission control, the 4WD and diff lock solenoids, and the brake system. The transmission control/CAN diagram on page 5 shows exactly how the A050 talks to the engine ECU and the instrument cluster. This is the same data Fendt field techs use. If you’re swapping a control unit or diagnosing a communication error, you need the factory CAN bus termination values and the correct supply voltages. The manual doesn’t skip those. It also covers the A051 EDC engine control unit – the Common Rail diesel controller – with its own pinout and fault-finding steps.

Component Testing: From A007 to B017

Section E lists every electronic component by its alphanumeric designation – A007 instrument panel, A009 actuator unit, B008 high-pressure sensor, B015 bevel pinion sensor, and so on. For each one, the manual gives the expected resistance or voltage range, the connector view, and the test procedure. You don’t have to guess which wire is the signal line. The radar sensor (A011), the Autoguide receiver (A058), the air conditioning system (A053) – all covered. That’s the kind of depth that saves you from ordering a $500 part you don’t need. The manual also includes the tightening torques for bolts in Nm (kpm) on page 25 of the general section – a page you’ll bookmark for every engine and transmission job.

Fault Code Tables and Error Search Plans

Two complete fault code tables are in the manual: one for the Common Rail diesel engine (without fault codes) and a specific table for the FENDT 900 Vario COM III. There’s also an error search plan for the compressed air trailer brake system, plus a guide to checking satellite reception for the Auto-Guide system. If you’re dealing with a fault that sets a code, you can jump to the table and find the associated component, the possible cause, and the recommended test. The manual also includes a history of the FENDT 900 VARIO COM III farm tractor and a full documentation layout – so you know exactly where to find the information you need.

Why OEM Factory Specs Matter for the 900 Vario

I’ve seen aftermarket manuals that list the wrong torque for the front axle suspension bolts, or miss the ECU variant for the 933 Vario COM III. This is the original 2007 workshop manual published by AGCO GmbH. The files are scanned from the actual Fendt service-training documentation (X990.005.057.010 – Englisch, Volume 2). Every torque value, every wire color, every hydraulic pressure spec comes from the same source that built the tractor. You can trust the 1267 pages because they were written by the engineers who designed the electrical system and the transmission. For real-world reference, I keep a copy on my tablet next to the laptop running the diagnostic software. It’s that consistent.

Fendt 900 Vario COM III: Which Models and Years Covered

This manual covers the 922 Vario COM III from chassis number 919..0101-, the 924 Vario COM III from chassis 922..0101-, the 927 from 925..0101-, the 930 from 928..0101-, and the 933 from 931..0101-. It also includes the 936 Vario COM III. The publication year is 2007, and the manual is Volume 2 of the FENDT 900 Vario COM III series. If you need the earlier volume, check the related product FENDT 900 Vario 2007 Workshop Manual Volume 1. For smaller tractors, see the Fendt 300 Vario COM III Tractor Workshop Manual or the Fendt 700/800 Vario 2006 Workshop Manual. For background on how a Manual Transmission works, the Wikipedia article is a good primer – but for this tractor’s transmission, you need the OEM wiring and hydraulic diagrams.

Q: Does this manual cover the 936 Vario COM III?

Yes. The manual lists the 936 Vario COM III from chassis number 934..0101- in the model coverage.

Q: What about the engine wiring? Is it included?

The manual includes the engine wiring diagram for the KHD engine on page 22 of the circuit diagrams, plus the A051 EDC engine control unit pin assignment and a separate fault code table for the Common Rail diesel engine. You get the full engine harness layout.

Q: Is this a PDF or a printed book?

It’s a digital access of the original factory PDF – 1267 pages, scanned from the official Fendt workshop manual. No reprints, no aftermarket modifications.

Q: How do I find the torque specs for the transmission bolts?

General tightening torques are listed on page 25 of the overall system section. For specific transmission components, refer to the torque values given in the A050 ECU and transmission control sections. The manual always specifies Nm (kpm).

If you’re working on a Fendt 900 Vario COM III and you need the real factory data – not a copy of a copy – this is the file to have on your bench. Access the Factory Manual and get the electrical diagrams, transmission control specs, and torque values that the OEM designed. No guesswork, no wasted hours.