Engine, clutch, transmission, steering clutches and brakes, tracks, both hydraulic circuits, the power lift and electrical system run end to end through this 437-page Landini Service Training manual (OEM 3662270M2) for the Trekker crawler tractor, 70 through 100 plus CF and CFL versions. Wiring diagrams fill much of the electrical section, the biggest part of this Landini 90 service training PDF, and hydraulic schematics trace both circuits through to the operating pressure tests. Your pinion setup is covered too, down to the dummy bearings and taper gauge listed among the special tools. Confirm the radiator cap holds 0.7 bar on the 70, 80 and 90, then torque M10 x 1.25 fasteners to 50 Nm galvanized or 55 Nm burnished. A guessed shim costs you a second teardown. Bookmarks and a searchable text layer put you on power lift adjustments or a wiring diagram in a few clicks, so the crawler is back in the field before the weather turns.
What's Inside This Landini Trekker 70-100 Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | 1-65 | Reading the Manual, Tractor Identification, Working in Safety |
| Engine | 66-87 | Technical Specifications, Driving Torque Values, Engine Tuning |
| Clutch | 88-103 | General Description, Technical Specifications, Inspection and Overhaul |
| Transmission | 104-141 | General Description, Technical Specifications, Main Components and Adjustments |
| Steering Clutch Assemblies & Brakes | 142-163 | General Description, Technical Specifications, Inspection and Adjustments |
| Tracks | 164-189 | General Description, Technical Specifications, Inspection for Wear and Adjustments |
| Low Pressure Hydraulic Circuit | 190-217 | General Description, Technical Specifications, Main Components |
| High Pressure Hydraulic Circuit | 218-253 | General Description, Main Components, Operating Pressure Tests |
| Mechanical Power Lift | 254-293 | General Description, Technical Specifications, Inspections, Adjustments and Troubleshooting |
| Electrical System | 294-419 | General Description, Wiring, Main Components |
| Special Tools | 420-437 | Main Clutch Lever Adjustment Tool, Tapered Pinion Measurement Support, Pinion-Crown Wheel Dummy Bearings, Steering Clutch Ring Nut Key, Ring Gear Shaft Taper Bearing Gauge |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Battery Voltage | 12 V | p. 313 |
| Battery Starting surge when cold at -18°C in 20 sec. | 470 A | p. 313 |
| M 8 x 1 torque | 25 Nm (galvanized), 27 Nm (burnished) | p. 59 |
| M 8 (1.25) torque | 23 Nm (galvanized), 25 Nm (burnished) | p. 59 |
| Radiator plug pressure | 0.7 bar | p. 71 |
| Intake filter filtration rating | 50 micron | p. 197 |
| Delivery filter filtration rating | 20 micron | p. 197 |
| Hydraulic test oil temperature | 30/40 °C | p. 251 |
| Maximum leak tolerated at 150 bar and 25-30°C | 3 cc in 3 minutes | p. 277 |
| Inductive sensor resistance | 450 ohm | p. 393 |
| Overheating warning light activation temperature | 105-110°C (221-230°F) | p. 410 |
| Steering Clutch Operating Pressure | max 30-32 bar | p. 16 |
Landini Trekker 70-100 Common Problems This Manual Covers
Landini Trekker mechanical power lift fails to hold a raised implement and slowly settles
Test the valve system with oil at 25-30°C and 150 bar following page 277; the maximum leak tolerated is 3 cc in 3 minutes. Check the servo valve separately, which may leak up to 100 cc in 2 minutes at 150 bar on page 279. Confirm lift operating pressure reaches 180 bar before hitching back up for fieldwork.
Manual Section: Mechanical Power Lift Troubleshooting p. 277Steering clutch slow to release or brakes weak when pulling the steering control levers
Measure the low pressure circuit at the steering clutch and brake: page 16 lists max 30-32 bar for the steering clutch and 18-20 bar for the brakes. If pressure is good, check ring nut and control lever adjustment, then bleed the brake circuit and run the clutch and brake activation sequence test.
Manual Section: Steering Clutch and Brake Inspection and Adjustments p. 16Main clutch pedal and servo lever out of adjustment, clutch dragging or slipping under load
Adjust the clutch pedal free travel first (page 99), then set the servo clutch control lever to 1 mm play following the procedure on page 100. Use the Main Clutch Lever Adjustment Tool from the Special Tools section for the clutch assembly lever height rather than eyeballing it. Inspect the clutch for wear during overhaul, and recheck engagement before the tractor goes back to the field.
Manual Section: Clutch Inspection and Overhaul p. 100Remote hydraulics weak, auxiliary control valve slow to lift a heavy implement
Check that the oil sits at 30/40 °C per page 251, then test auxiliary control valve pressure and implement lifting pressure. Compare the reading against the pump maximum operating pressure of 180 ±0.5 bar listed on page 227. Get real numbers on the gauge before pulling any parts off the tractor in the middle of the season.
Manual Section: High Pressure Hydraulic Circuit Operating Pressure Tests p. 251Brake light circuit dead or intermittent with no obvious damage to the wiring
Test the circuit for continuity and then for short circuits following the brake light fault example. Work through the wiring diagrams section by section. Verify the battery holds 12 V first, since page 313 lists a 12 V, 100 Ah battery and a low supply muddies every reading.
Manual Section: Electrical System TroubleshootingEngine overheating warning light comes on during heavy work in the field
Verify the reading is real: the overheating warning light should activate at 105-110°C (221-230°F), per page 410. On Trekker 70, 80 and 90, test the radiator plug holds 0.7 bar as listed on page 71. Check the wiring for the warning light with the continuity tests in the electrical troubleshooting section.
Manual Section: Electrical System p. 410Frequently Asked Questions
What are the valve clearance specifications for the Landini Trekker 70/70F and 80/80F engines?
For the Landini Trekker 70/70F and 80/80F engines, the cold intake valve clearance is 0.20 mm and the cold exhaust valve clearance is 0.45 mm. p. 72
What is the correct torque value for the cylinder head bolts on the Landini Trekker 1004.40/1004.42/1004.40T engines?
The cylinder head bolts must first be tightened to 110 Nm. Following this, they must be tightened further by rotation: 150° for S bolts, 180° for M bolts, and 210° for L bolts. p. 78
What is the required free travel for the main clutch pedal on the Landini Trekker tractors?
The free travel (A) measured on the main clutch pedal must be between 2.5 and 3.5 cm. It is adjusted by slackening the nut (27) and adjusting the fork (26) on the rod (28). p. 99
What is the required play for the intake valve of cylinder N° 1 when checking camshaft timing on the Landini Trekker tractors?
When checking the camshaft timing, the play of the intake valve of cylinder N° 1 must be 1.5 mm before turning the drive shaft to the shut position. p. 86
What is the maximum tolerated leak for the discharge valve in the Landini Trekker mechanical power lift?
The maximum leak tolerated for the discharge valve at a pressure of 150 bar and a temperature of 25-30°C is 3 cc within 3 minutes. p. 277
Is this Landini 70 manual a PDF I download?
Instant PDF download. You get the full 437-page searchable Service Training immediately after payment. Open it on your laptop, tablet, or phone right in the shop.
Is printing allowed for this Landini 70 Service Training?
Yes. Print the pages or sections you need for your own shop use. Any standard printer works.
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