Part of the Case Repair Manuals.
Need factory-level overhaul procedures for your Case or International 3104, 3105, or 3106 rotary mower? This 37-page service manual (OEM #GSS-1494) covers angle drive teardown, cutter bar rebuilds, hydraulic cylinder service, PTO drive train knuckle work, and knife and disc replacement from start to finish. Inside: a full standard torque table with bolt type identification, hydraulic schematics for the lift cylinder circuit, and exploded views of every major assembly. You get complete overhaul sequences for the angle drive, drive pulley assembly, and disc bearing service, each broken into removal, disassembly, and reinstallation steps. Press the disc hub onto the gear shaft with enough shims to set end play at 1-4 mm (.004-.016 inches); bench-test the hydraulic cylinder at 200 kPa (29 psi) and hold pressure to confirm zero seal leak. Every hour the mower sits costs you money. Bookmarked by section; open on any device, search a spec, and get back to work.
What's Inside This Case 3104-3106 Manual
| System | Pages | Key Topics |
|---|---|---|
| Safe Work Rules | 4-5 | Hydraulic Jacks, Hoists, Hoist Hooks, Safety Stands, Acetylene Torch, Oxygen Tanks, Hydraulic Cylinders, Battery |
| Standard Torque Data for Nuts and Bolts | 6-7 | Recommended Torque, Foot Pounds, Newton Meters, Bolt or Stud Diameter, Bolt Type Identification Chart |
| Metric Conversion Table | 8-10 | Inches to Millimeters, Millimeters to Inches |
| Angle Drive | 11-17 | Coupling Bar, Cutter Bar Shield, Rear Belt Shield, Angle Drive Housing, Bevel Gear Shaft, Pinion Gear Shaft, Belt Pulley |
| Cutter Bar | 18-24 | Overhaul, Removal, Disassembly, Gear Bearing Service, Disc Bearing Assembly Service, Installation |
| Drive Pulley Assembly | 25-26 | Coupling Bar, Roll Pin, PTO Shield, Bearing Housing Cover, Snap Ring, Housing, Front Bearing |
| Hydraulic Cylinder | 27-29 | Guiding Socket, Double Lip Oil Seal, Circlip, Scraper Ring, Anti-Extrusion Ring, Teflon Washer, Leather Washer, Piston Rod |
| PTO Drive Train | 30-33 | Shield Removal, Knuckle Service, Disassembly, Reassembly |
| Knife and Disc Service | 34 | Self-Locking Nut, Cupel, Knife Holder, Knife, Discs, Inclined Rods |
| Guide Rails | 35-37 | Cutter Bar Shield, Drive Housing |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Hydraulic cylinder seals and washers replacement | must be replaced | p. 29 |
| Hydraulic cylinder test pressure | 200 kPa (29 psi) | p. 29 |
| Disc hub end play | 1-4 mm (.004-.016 inches) | p. 22 |
| O-ring protrusion on upper gear case cover | 3.5-4 mm (.138-.157 inches) | p. 23 |
| Outer disc replacement | Replace the complete disc if a rod is broken or deteriorated | p. 34 |
| Coupling bar to angle drive housing hinge bolt torque | 163 N·m (120 ft. lbs.) | p. 17 |
| Cutter bar shield mounting bolt torque | 79 N·m (58 ft. lbs.) | p. 17 |
| First intermediate gear low profile nut torque | 93-105 N·m (69-77 ft. lbs.) | p. 24 |
| 3104 Mowers | ||
| Belt tension | 502 mm (19-3/4 inches) between marks that were 500 mm (19-11/16 inches) apart | p. 17 |
| 3105 Mowers, 3106 Mowers | ||
| Belt tension | spring end is between gauge limits "A" and "B" | p. 17 |
| 3104 | ||
| 3104 Mower belt tension adjustment distance | 502 mm (19-3/4 inches) | p. 17 |
Case 3104-3106 Common Problems This Manual Covers
Case 3104 mower deck stops rotating after 10-15 minutes, drive belt won't turn under load p. 25
Remove the belt guards and inspect the drive belt set at page 25 for glazing, cracking, or pulley groove slippage. Check pulley alignment and bearing drag on the drive pulley assembly. If any single belt in the set is worn or damaged, replace the complete set. Verify all pulley fastener torques against the standard torque table on page 6; a loose pulley destroys belts fast.
Manual Section: Drive Pulley AssemblyDisc hub wobbles or runs rough, cutter bar vibrates and makes grinding noise p. 22
Remove the disc hub and check end play per page 22: press the hub onto the gear shaft with the correct shim stack to achieve 1-4 mm (0.004-0.016 in.) end play. Inspect disc bearings for pitting or flat spots and replace as needed. On reassembly, verify the upper gear case cover O-ring protrudes 3.5-4 mm (0.138-0.157 in.) before closing the case and torque 10 mm gear case bolts to 64 N·m (47 ft. lbs.).
Manual Section: Cutter BarPTO clutch won't engage or fuse blows immediately when engagement switch is pressed p. 30
Disconnect the PTO drive train shield per page 30 and inspect knuckle joints for binding or seized bearing cups. Check PTO shaft splines for packed grass debris, which overloads the clutch on engagement. Verify all shield guards seat correctly before reinstalling; a guard contacting the rotating shaft generates current spikes that blow fuses. Torque all fasteners to the applicable grade specification in the table starting at page 6.
Manual Section: PTO Drive TrainOuter disc inclined rod broken or bent, mower runs with excessive vibration and uneven cut p. 34
Inspect each outer disc at page 34: each outer disc carries four inclined rods. If any rod is broken or deteriorated, replace the complete disc assembly. Do not attempt to weld or straighten individual rods. With the disc removed, check knife holders and self-locking nuts for looseness. On reassembly torque the first intermediate gear low-profile nut to 93-105 N·m (69-77 ft. lbs.) per page 24.
Manual Section: Knife and Disc ServiceHydraulic cylinder rod seal leaking fluid, deck drops under its own weight and won't hold position p. 27
Disassemble the hydraulic cylinder per page 27 and replace all seals and washers without exception during reassembly. Inspect the cylinder rod surface for scoring before installing new seals; a scratched rod destroys fresh seals in minutes. After rebuild, pressurize to 200 kPa (29 psi) and hold for several minutes to confirm zero leakage before bolting the cylinder back to the mower frame.
Manual Section: Hydraulic CylinderAngle drive housing leaks gear oil, drive makes whining or clunking noise under load p. 11
Remove the angle drive and work through the full overhaul sequence starting at page 11. Reference the exploded parts view at page 15 to identify worn shaft seals and bearings. Inspect all gear faces for pitting or spalling. On reinstallation, torque the coupling bar hinge bolts to 163 N·m (120 ft. lbs.) and the cutter bar shield mounting bolts to 79 N·m (58 ft. lbs.) as called out on page 17.
Manual Section: Angle DriveFrequently Asked Questions
What fluids and capacities does this machine require?
The machine requires IH 135 HEP Gear Lube (SAE 85W-140) for both the angle drive housing and the cutter bar gear case. The oil capacity for the 3104 model is 1.3-1.4 litres (1.4-1.5 quarts), for the 3105 model it is 1.5-1.6 litres (1.6-1.7 quarts), and for the 3106 model it is 1.6-1.7 litres (1.7-1.8 quarts).
What are the hydraulic system specifications?
For the hydraulic cylinder, a test pressure of 200 kPa (29 psi) should be obtained on the gauge and held for a few minutes to check for leakage during reassembly. A 14-64-7 Hydraulic Test Kit is used for this procedure.
What torque specifications are listed?
Specific torque specifications include 163 N·m (120 ft. lbs.) for bolts connecting the coupling bar to the angle drive housing hinges, and 79 N·m (58 ft. lbs.) for cutter bar shield mounting bolts. The low profile nut for the first intermediate gear must be torqued to 93-105 N·m (69-77 ft. lbs.). Additionally, 8 mm bolts require 35 N·m (29 ft. lbs.), 10 mm bolts require 64 N·m (47 ft. lbs.), and 12 mm bolts require 160 N·m (118 ft. lbs.). IH Thread Locker 634 017 C1 (Loctite 262) should be used on gear case nuts and bolts.
How do you fix International 3104 mower deck stops rotating after 10-15 minutes, drive belt won't turn under load?
Remove the belt guards and inspect the drive belt set at page 25 for glazing, cracking, or pulley groove slippage. Check pulley alignment and bearing drag on the drive pulley assembly. If any single belt in the set is worn or damaged, replace the complete set. Verify all pulley fastener torques against the standard torque table on page 6; a loose pulley destroys belts fast.
How quickly can I access this International 3104 & variants manual after buying?
You get a 37-page searchable PDF that downloads instantly after checkout. Open it on your laptop, tablet, or phone, and bring it right to the shop floor.
Is this International 3104 & variants Service Manual printable?
No restrictions at all. Print individual pages, full chapters, or the entire manual. The PDF is completely unlocked.
Can I find hydraulic circuit diagrams in this International 3104 & variants manual?
No, this manual does not contain full hydraulic system schematics or diagrams. It describes servicing a hydraulic cylinder with a cross-section view.
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