When a Rex starts flashing alarm codes on the check-control display or the shuttle slips in the middle of hay cutting, this 491-page Landini 90F service training PDF (OEM ID 3665258 M1) is the factory course for it, covering six Rex variants from the 70GT up to the 100GT. Wiring diagrams trace the electrical system through the biggest chapter in the book, and hydraulic schematics map the low pressure circuit before showing you how to inspect operating pressure values. Transmission disassembly and adjustment guidelines follow, then alarm code tables, calibration procedures and drawings for making the special tools yourself. Fit filtration at 60 micron on the intake side and 20 micron on the delivery, and hold critical assemblies within plus or minus 5 percent of specified torque. Out at the far shed, it's you and the tractor. Bookmarks and a searchable text layer drop you on the right chapter in seconds, while the weather holds.
What's Inside This Landini Rex 70GT, 80GT, 90F/GT, 100F/GT Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | 1-51 | Reading the Manual (Introduction, Structure of the Manual), Tractor Identification (Weights and Dimensions) |
| Transmission | 52-133 | General Description, Technical Specifications, Guide Lines for Disassembly, Re-Assembly and Adjustments |
| Hydraulic Circuit | 134-219 | General Description, Main Components of the Low Pressure Circuit, How to Inspect the Operating Pressure Values |
| Electrical System | 220-379 | General Description, Wiring, Main Components |
| Check-Control and Troubleshooting | 380-449 | Alarm Codes |
| Calibration | 450-475 | Calibration Procedure |
| Special Tools | 476-491 | Constructional Drawings |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Critical assembly torquing tolerance | +5% / -5% | p. 45 |
| Important assembly torquing tolerance | +5% / -15% | p. 45 |
| PTO speed sensor adjustment | unscrew by about 1/2 a turn | p. 128 |
| Filtering degree (on the intake) | 60 micron | p. 147 |
| Filtering degree (on the delivery) | 20 micron | p. 147 |
| Maximum operating pressure | 180 bar | p. 147 |
| Steering system calibration valve | 170±5 bar | p. 147 |
| Battery Voltage rating | 12 V | p. 249 |
| Battery Starting surge when cold at -18°C in 30 sec. | 450 A | p. 249 |
| PTO speed sensor clearance | 0.02-0.18 mm | p. 333 |
| Overheating warning light activation temperature | 105-110°C (221-230°F) | p. 361 |
| Fuel gauge reserve capacity | 10 litres (2.25 gal.)(2.64 US gal.) | p. 361 |
Landini Rex 70GT, 80GT, 90F/GT, 100F/GT Common Problems This Manual Covers
Landini Rex rear PTO clutch slow to engage or not engaging with the engine running
Connect a pressure gauge to the PTO clutch circuit, run the engine with the PTO engaged, and read 18 to 22 bar, the spec on page 211. If it reads low, check the low pressure calibration valve against its 20 bar setting on page 166 before pulling the clutch assembly. Then get back to the field.
Manual Section: Hydraulic circuit pressure tests p. 211PTO speed sensor giving erratic or missing speed readings after rear PTO work
Measure the PTO speed sensor clearance and hold it to 0.02 to 0.18 mm, the figure on page 333. When refitting the sensor during rear PTO reassembly, unscrew it about half a turn as page 128 specifies. Test the wiring for open or grounded circuits before condemning the sensor, then get back to baling.
Manual Section: Rear Power take-off disassembly p. 128Power steering heavy or weak at full lock with the steering cylinder at end of stroke
Test steering pressure with a gauge fitted to the circuit, turning the wheel until the steering cylinder reaches end of stroke. The reading must sit between 165 and 175 bar per page 209. If it falls short, check the steering system calibration valve against its 170±5 bar setting on page 147 before harvest loads hit.
Manual Section: Hydraulic circuit pressure tests p. 209Front 4WD will not disengage or differential lock will not engage with engine running
Check pressure at the 4WD disengaging circuit with the engine running and 4WD disengaged; the gauge must read 18 to 22 bar per page 210. Repeat with the differential lock engaged and look for the same 18 to 22 bar. If both read low, check the low pressure calibration valve against 20 bar on page 166 and get back to the field.
Manual Section: Hydraulic circuit pressure tests p. 210Reverse shuttle, overdrive or underdrive engagement slow or not engaging at all
Test engaging pressure on each circuit with a gauge and the engine running. Reverse must read 18 to 22 bar per page 212; overdrive and underdrive must hold the same 18 to 22 bar on page 213. If all three read low, check the low pressure calibration valve against 20 bar on page 166 before the weather turns.
Manual Section: Hydraulic circuit pressure tests p. 212Engine overheating warning light coming on at the dash during heavy field work
Verify actual engine temperature before chasing parts: the overheating warning light should only activate at 105 to 110°C (221 to 230°F) per page 361. If the engine reads cooler and the light still comes on, test the warning light circuit for a grounded or short circuit using the wiring troubleshooting procedures starting on page 220.
Manual Section: Electrical System p. 361Frequently Asked Questions
How do I calibrate the main clutch on a Landini Rex Deltashift tractor?
To calibrate the main clutch, turn the ignition to the contact position (engine off), press buttons _SB3 and _SB4 on the gearshift lever for 10 seconds until (C1) appears, then press _SB3 until (C2) appears. Depress _SB3 and _SB4 for 10 seconds until (AC-2) flashes, then follow the on-screen prompts until (do) appears, indicating completion. p. 468
What is the procedure for checking the steering cylinder pressure on a Landini Rex?
Mount rigid tool 03 IDR REX with adapter 122 IDR GL in the connection point between the rubber and rigid tubes, then apply a 0 to 400 bar pressure gauge. When the steering cylinder reaches the end of its stroke, the gauge must indicate a pressure between 165 and 175 bar. p. 209
What is the correct resistance value for the inductive sensors on the Rex Deltashift?
To check the inductive sensors, use a tester to measure the resistance across the sensor terminals. The resistance value must be approximately 450 Ohm. p. 325
What is the required distance between the PTO speed selection sleeve and the PTO rate sensor?
If the PTO rate sensor is replaced, you must install shims to maintain a distance of 0.02-0.18 mm between the teeth of the PTO speed selection sleeve (269) and the sensor itself. p. 333
What is the operating pressure for the low pressure hydraulic circuit on the Landini Rex 70GT, 80GT, 90F/GT, 100F/GT?
The low pressure hydraulic circuit, which controls functions like the differential lock, creeper, and PTO brake, operates at a pressure of 20 ± 2 bar. p. 139
How quickly can I access this Landini 70GT manual after buying?
You download the Training Manual yourself: 491 pages, searchable PDF, available immediately. Keep a copy on every device you use.
Is printing allowed for this Landini 70GT Training Manual?
Yes. Print the pages or sections you need for your own shop use. Any standard printer works.
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