Part of the Case IH Repair Manuals.
A knotter that starts throwing loose bales in the middle of baling season will not wait for a dealer opening. The Case IH LBX331, LBX421, LBX431 repair manual PDF, OEM document 87019910, answers that with 888 pages of factory service work covering all three square balers. Wiring diagrams, electronic module troubleshooting, and error code references take up roughly a third of the book, and hydraulic schematics trace the bale density, pickup lifting, and blade control circuits valve by valve. Teardown procedures run from the pickup and stuffer through the plunger, knotter drive, and twine needles. Before you torque the PTO driveshaft pinch bolt to 70 Nm, set the locking collar at 62 mm, straight from the spec table. Guessing that slip clutch figure shears parts, not twine. Bookmarked and text searchable, this PDF is bought once and yours for the life of your baler.
What's Inside This Case IH LBX331, LBX421, LBX431 Repair Manual
| System | Pages | Key Topics |
|---|---|---|
| General Information | 17-48 | Introduction, Important Information, Spare Parts, Safety Regulations, Explanation of Machine Serial Numbers, Units of Measure - Conversion Chart |
| Implement Power Take-Off | 49-128 | P.T.O. Drive Shaft (Walterscheid P.T.O. Driveshaft, Cv U-Joint, Standard U-Joint, Center Support Bearing Replacement, Flywheel Slip Clutch) |
| Brakes and Controls | 129-146 | Brake Shoe - Removal, Brake Control Shaft - Rep., Brake Shoe - Installation, Air Brake Valve |
| Hydraulic Systems | 147-268 | Bale Density, Pick-Up Lifting, Blade Control, Bale Ejector - Chute Positioning - Rear Wheel Locking, Lincoln Centralised Greasing System, Oiler System |
| Axles and Wheels | 269-276 | Specifications, Description of Operation, Sectional Views, Tire and Wheel, Wheel Hub and Bearing |
| Electrical System | 277-548 | General, Wiring Diagrams, Troubleshooting, Electronic Modules |
| Product Feeding | 549-706 | Pickup, Packer, Stuffer, Rotor |
| Pressing | 707-738 | Plunger and Connecting Rods |
| Tying/Wrapping | 739-870 | Knotter General Information, Knotter Drive, Knotter and Knotter Stack, Twine System and Needles |
| Ejection | 871-888 | Bale Discharge Chute, Bale Ejector |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Pick-up protection slip and overrunning clutch torque | 1450 Nm (1069 ft.lbs) | p. 34 |
| Feeder cut-out clutch torque | 6500 Nm (4795 ft.lbs) | p. 36 |
| P.T.O. driveshaft locking collar distance | 62 mm (2-7/16") | p. 64 |
| P.T.O. driveshaft pinch bolt torque | 70 Nm (52 ft.lbs) | p. 65 |
| Outer ring installation distance | 10 mm (3/8") | p. 116 |
| Backlash of crown wheel | 0.1 mm - 0.4 mm (0.00394 - 0.01575") | p. 117 |
| Hydraulic pump capacity (Density circuit) | 3.8 cc/rev | p. 147 |
| Maximum hydraulic pressure (Bale density circuit) | 190 bar | p. 43 |
| Maximum hydraulic pressure (Bale ejector circuit) | 150 bar | p. 173 |
| Packer slip clutch torque | 2100 Nm | p. 606 |
| Packer fork bearing clearance | 0.5 mm | p. 606 |
| Knife clearance | 3 mm | p. 708 |
Case IH LBX331, LBX421, LBX431 Common Problems This Manual Covers
Case IH LBX431 PTO driveshaft vibration under load, repeated broken yokes and worn U-joints
Inspect both U-joints and the center support bearing for play with the driveshaft disconnected. Set the locking collar distance to 62 mm (2-7/16 inch) as shown on page 64, then torque the pinch bolt to 70 Nm (52 ft.lbs) per page 65. Grease every cross before you hook back up.
Manual Section: Implement Power Take-Off p. 64Bale density drops off and no pressure builds in the density circuit
Check the density circuit with a gauge teed in and run the system to full pressure. Verify relief pressure reaches the 190 bar maximum listed on page 43; if it stays low, pull the 3.8 cc/rev density pump covered on page 147 and inspect it for wear. Check density cylinder seals for internal bypass.
Manual Section: Hydraulic Systems p. 147Packer forks develop excessive play and pickup stops feeding evenly in heavy windrows
Measure packer fork bearing clearance against the 0.5 mm limit on page 606 and replace any bearing past spec. Verify the packer slip clutch still holds 2100 Nm; a glazed or weak clutch slips in heavy windrows. Replace bent tines and worn pickup bands at the same time so the pickup feeds clean.
Manual Section: Product Feeding p. 606Knotter misses ties, billhook breaks twine, bales drop with loose or broken strands
Check twine tension first: set upper runs to 10 to 12 kg and lower runs to 12 to 14 kg per page 760. Verify knotter frame preload sits in the 67 to 98 Nm range on page 758, then inspect the billhook and twine discs for burrs and reset timing before the weather window opens.
Manual Section: Tying/Wrapping p. 760Plunger knocks at end of stroke and bales come out ragged with uneven flakes
Measure plunger knife clearance and reset it to 3 mm as specified on page 708. Inspect the roller track and plunger bearings for spalling or flat spots while the chamber is empty; a worn track hammers the whole driveline. Replace track wear parts in pairs so the plunger runs square through harvest.
Manual Section: Pressing p. 708Frequently Asked Questions
What is the M20 bolt tightening torque on the axle assembly main frame of a Case IH LBX331, LBX421, LBX431 baler?
The tightening torque for the M20 bolts on the main frame of the axle assembly is 410-495 Nm (302-363 lbs/ft). p. 269
What is the correct oil specification and capacity for the main drive gearbox on Case IH LBX331, LBX421, LBX431 balers?
The main drive gearbox requires 20 liters (5.3 US gal) of SAE 85W-140 oil meeting API-GL5 and MIL-L-2105 D specifications. p. 265
What is the procedure for adjusting the knotter frame preload?
To adjust the knotter frame preload, attach a spring scale to the pin hole in each knotter frame. Each knotter should swing upward with a force of 67-98 Nm (15-22 ft. lbs.). If the force is incorrect, adjust the right-hand end (3rd) expanding ring set by rotating the rings one notch at a time. p. 831
What is the correct clearance between the knives and the stationary knife on a Case IH LBX331, LBX421, LBX431 baler?
The clearance between the plunger knives and the stationary knife should be 3 mm (1/8 inch). p. 708
What is the torque specification for the packer slip clutch on Case IH LBX331, LBX421, LBX431 balers?
The packer slip clutch is factory set to a torque of 2100 Nm (1550 ft. lbs.). p. 606
What exactly do I receive with this Case IH LBX331 Repair Manual?
All 888 pages arrive as one searchable PDF at checkout. Read it at the desk, then take the phone out to the machine.
Can I print just the pages I need from this Case IH LBX331 manual?
No restrictions at all. Print individual pages, full chapters, or the entire manual. The PDF is completely unlocked.
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