Part of the Case Repair Manuals.
All 82 pages of this Case 220 Baler Service Manual (OEM #9-64161) focus on a single setup: the 220 Baler, Wisconsin Model THD Engine, and 220 Bale Launcher. Inside, you get detailed service procedures for the gear box, plunger, feeder arm, pickup unit, and the full tying mechanism, including knotter timing that most operators chase for hours without factory guidance. The lubrication section walks you through every grease point from the engine drive and PTO to the crankcase and gear box, backed by exploded views and bale adjustment procedures for tension, uniformity, and measuring stop. Run your PTO at 540 RPM under load, hold the plunger to 65 strokes per minute, and keep the Wisconsin THD crankcase at 3-1/2 quarts. Baler down mid-season is money out of your pocket. Bookmarked by section so you can jump straight to knotter timing or bale adjustments on any device and get back to baling.
What's Inside This Case 220 Baler, Wisconsin Model THD Engine, 220 Bale Launcher Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | 4 | Serial Numbers |
| General Specifications | 5-6 | Drive Option, Engine, Baler, Drawbar, Pickup, Feeding Mechanism |
| Safety Instructions | 7 | - |
| Setting Up Instructions | 8-19 | Wheel Installation, Drawbar Installation, Flywheel Installation, Bale Diverter Installation, Power Take-Off Assembly, Engine Installation |
| Lubrication | 20-23 | Engine Drive, Power Take-Off, Baler, Crankcase, Air Cleaner, Gear Box |
| Run-In Procedure | 24-25 | Baler, Engine, Twine Usage |
| Service Instructions | 26-75 | Power Take-Off Assembly, Gear Box, Plunger, Feeder Arm, Pickup Unit, Tying Mechanism |
| Service Suggestions | 76-78 | - |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| 220 Baler | ||
| PTO Operating Speed (Under Load) | 540 RPM | p. 5 |
| Plunger Speed | 65 Strokes Per Minute | p. 6 |
| Left Hand Tire Air Pressure | 40 Pounds | p. 6 |
| Power Take-Off Baler Weight (Approximate) | 1850 Pounds | p. 6 |
| PTO Slip Clutch Torque | 200 foot pounds | p. 26 |
| Gear Box Backlash | .006" to .008" | p. 32 |
| Feeder Arm Spring Tension (Compressed) | 7 inches | p. 42 |
| Wisconsin Model THD Engine | ||
| Engine Crankcase Capacity | 3-1/2 Quarts | p. 5 |
| Fuel Tank Capacity | 9-1/4 Gallons | p. 5 |
| All Models | ||
| Hex. Bolt Torque (1/2 x 1-1/4") | 90-95 ft. lb. | p. 32 |
| Twine Minimum Tensile Strength | 330 lbs. | p. 24 |
Case 220 Baler, Wisconsin Model THD Engine, 220 Bale Launcher Common Problems This Manual Covers
Case 220 Baler PTO slip clutch shearing flywheel bolt repeatedly under normal field loads p. 26
Check clutch spring adjustment before condemning the flywheel bolt. Torque the clutch springs so the assembly slips at exactly 200 foot-pounds — see the adjustment procedure on page 26. If bolt shearing continues after correct torque is confirmed, inspect the flywheel hub keyway for wear and verify PTO speed stays at 540 RPM under load. A clutch set too tight transfers every shock directly to the bolt.
Manual Section: Adjusting Spring Tension of Slip ClutchBales coming out loose, curled, or misshaped despite consistent windrow conditions p. 75
Adjust the restrictor lugs and feeder head position on page 75 first. Then verify plunger speed is at 65 strokes per minute — if it's sluggish, check the drive belt tension per page 19. Compress the feeder arm springs to 7 inches; springs outside that spec let material feed unevenly and are a leading cause of bale shape problems.
Manual Section: Bale Shape AdjustmentsTwine knots failing or tying mechanism missing ties on every third or fourth bale p. 61
Time the needles-to-knotters and needles-to-plunger clearances per pages 61-67 before replacing any parts. Inspect twine spool tensile strength: only run twine rated at minimum 330 lbs. Also check the needle safety latch timing on page 68 — a latch that trips late allows the plunger to strike the needle, causing intermittent missed ties and eventual needle breakage.
Manual Section: Tying Mechanism Timing and AdjustmentsPickup unit failing to gather full windrow, leaving a trail of hay on one side p. 46
Adjust the pickup lower and upper limit stops per page 46 so the unit floats freely over ground contours without riding too high. Check pickup finger timing and inspect for bent fingers. Verify left-hand tire pressure is at 40 pounds — an underinflated tire tilts the baler enough to raise the pickup on one side and miss part of the windrow on every pass.
Manual Section: Pickup Height AdjustmentPlunger binding in chamber or hitting stationary knife, causing driveline shock and stoppage p. 40
Measure plunger knife-to-stationary knife clearance per pages 40-41 and adjust until clearance is uniform across the full knife width. Inspect the plunger guide rails for wear or debris buildup causing side-load. After reassembly, torque any 1/2 x 1-1/4" hex bolts to 90-95 ft. lb. Restart at low PTO speed and listen for scraping before loading the baler with crop.
Manual Section: Plunger Knife - Stationary Knife ClearanceGear box running hot or noisy after field season, oil weeping from housing seams p. 28
Disassemble the gear box per pages 28-32 and inspect all bearing races and gear teeth for pitting. Reassemble and set backlash at .006" to .008" measured on the pinion spline side — backlash outside this range causes the heat and noise you're hearing. Refill to the correct level per the lubrication schedule on page 20 and run briefly before returning to field work.
Manual Section: Gear Box Disassembly and ReassemblyFrequently Asked Questions
How to reset the knotter timing on a Case 220 baler?
To reset the knotter timing, first ensure needles are set at a light rub to 1/16" clearance from the Knotter Frame and 1/16" from the Twine Disc Cleaners. Then, adjust the Needle Pitman length to achieve 1-1/2" to 1-3/4" clearance between the needle tip and the inside of the bale case. Finally, ensure needles enter the bale chamber 1" to 1-1/2" behind the Plunger Gussets, adjusting the Knotter Drive Chain by one tooth or rotating the sprocket one hole if necessary.
How to adjust the needles on a Case 220 baler
To adjust the needles, first set them at a light rub to 1/16" clearance from the Knotter Frame and 1/16" from the Twine Disc Cleaners by loosening nuts on the "U" bolts and shifting the needles. Next, adjust the Needle Pitman length to achieve 1-1/2" to 1-3/4" clearance between the needle tip and the inside of the bale case. Finally, ensure about 1/16" clearance between the Tucker Fingers and Needles by loosening allen head screws and sliding the fingers.
How do you fix case 220 Baler PTO slip clutch shearing flywheel bolt repeatedly under normal field loads?
Check clutch spring adjustment before condemning the flywheel bolt. Torque the clutch springs so the assembly slips at exactly 200 foot-pounds — see the adjustment procedure on page 26. If bolt shearing continues after correct torque is confirmed, inspect the flywheel hub keyway for wear and verify PTO speed stays at 540 RPM under load. A clutch set too tight transfers every shock directly to the bolt.
How do you fix bales coming out loose, curled, or misshaped despite consistent windrow conditions?
Adjust the restrictor lugs and feeder head position on page 75 first. Then verify plunger speed is at 65 strokes per minute — if it's sluggish, check the drive belt tension per page 19. Compress the feeder arm springs to 7 inches; springs outside that spec let material feed unevenly and are a leading cause of bale shape problems.
How will I receive this Case 220 Baler, Wisconsin Model THD Engine, 220 Bale?
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