All 667 pages of this Case IH Farmall 80JXM / Farmall 90JXM Service Manual (OEM #47866581) are built around one goal: giving you factory-level control over every system on your Farmall® tractor. Inside, you get full wiring diagrams covering harnesses, connectors, alternator, and warning indicators, plus hydraulic schematics tracing the fixed displacement pump, remote control valves, and main lift circuit from reservoir to cylinder. The transmission section alone spans mechanical, power shuttle, creeper, and dropbox configurations — with exploded views and step-by-step rebuild procedures throughout. Set the hydraulic pump drive gear nut to 30 N·m and confirm your fixed displacement pump delivers at least 11 L/min at 166 bar before signing off on a rebuild. Your machine is down and the clock is running. Pull up the bookmarked PDF on your tablet, jump straight to the section you need, and get to work.
What's Inside This Case IH Farmall 80JXM, Farmall 90JXM, Farmall® 80JXM, Farmall® 90JXM Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | 7-22 | Foreword, Safety Rules |
| Clutch - 18 | 23-70 | Clutch and Components |
| Transmission - 21 | 71-194 | Mechanical Transmission, Power Shuttle Transmission, Master Clutch Housing, Power Shuttle Transmission External Controls, Power Shuttle Transmission Internal Components, Gearbox |
| Front Axle System - 25 | 195-242 | Powered Front Axle, Front Bevel Gear Set and Differential, Final Drive Hub, Steering Knuckles, And Shafts |
| Rear Axle System - 27 | 243-302 | Powered Rear Axle, Rear Bevel Gear Set and Differential, Planetary and Final Drives |
| Power Take-Off (PTO) - 31 | 303-324 | Two-Speed Rear Power Take-Off |
| Brakes and Controls - 33 | 325-370 | Mechanical Service Brakes, Hydraulic Service Brakes, Parking Brake or Parking Lock |
| Hydraulic Systems - 35 | 371-470 | Hydraulic Systems, Fixed Displacement Pump, Remote Control Valves, Main Lift System |
| Steering - 41 | 471-530 | Steering Control, Hydraulic Control Components, Cylinders |
| Wheels - 44 | 531-538 | Front Wheels |
| Electrical Systems - 55 | 539-620 | Electrical System, Harnesses and Connectors, Engine Starting System, Alternator, Battery, Engine Cooling System, External Lighting, Warning Indicators |
| Platform, Cab, Bodywork, and Decals - 90 | 621-663 | Protections and Footboards, Operator Protections, Mechanically-Adjusted Operator Seat, Engine Hood and Panels, Fenders and Guards |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Pump maximum rated output | 45.2 L/min (11.9 US gpm) | p. 384 |
| Pump output at 1500 RPM and 207 bar (3002 psi) - New or reconditioned | 27.3 L/min (7.2 US gpm) | p. 384 |
| Plate thickness - Transmission | 10.10 - 10.90 mm (0.40 - 0.43 in) | p. 27 |
| Plate thickness - Power Take-Off (PTO) | 7.30 - 7.90 mm (0.29 - 0.31 in) | p. 27 |
| Remote control valves - Relief valve setting - Cracking pressure | 185 - 195 bar (2682 - 2828 psi) | p. 400 |
| Remote control valves - Relief valve setting - Sustain pressure | 205 - 215 bar (2972 - 3118 psi) | p. 400 |
| Transmission Clutch Plate Thickness | 10.10 - 10.90 mm | p. 27 |
| PTO Clutch Plate Thickness | 7.30 - 7.90 mm | p. 27 |
| Master Clutch Housing to Fly-wheel Housing Buckle Up Bolts (C1) Torque | 100 N·m (74 lb ft) | p. 27 |
| Selector Lever Ball Spring Length (free) | 18.00 mm (0.71 in) | p. 74 |
| Front Axle Pinion-Crown Gear Ratio | 9/29=1:3.22 | p. 198 |
| Front Axle Bevel Gear Pair Backlash | 0.150 - 0.200 mm (0.006 - 0.008 in) | p. 198 |
Case IH Farmall 80JXM, Farmall 90JXM, Farmall® 80JXM, Farmall® 90JXM Common Problems This Manual Covers
Case IH Farmall 80JXM hydraulic system loses pressure after 2-3 hours of field operation, implements slow or won't lift
Test pump output at 1500 RPM: a used pump must deliver at least 11 L/min (2.9 US gpm) at 166 bar (2407 psi), confirmed on page 396. Below that, pull the pump and inspect for internal wear. Also verify the main lift relief valve opens at 186-191 bar (2697-2770 psi) per page 422. A valve stuck below that range will starve the lift circuit even with a good pump.
Manual Section: Hydraulic Systems - 35Clutch grabs or engages abruptly, pronounced jerk when pulling away from stops p. 67
Check the clutch troubleshooting sequence on page 67 for grab and snatch symptoms. Remove and measure transmission clutch plates: nominal thickness is 10.10-10.90 mm (0.40-0.43 in), wear limit travel 18 mm max. Inspect friction surfaces for glazing or oil contamination. If plates are within spec, check pressure plate springs and release bearing for uneven contact before reassembly.
Manual Section: Clutch - 18Gearbox jumps out of gear under load or resists engagement, selector feels loose or notchy
Inspect the selector lever ball spring: free length must measure 18.00 mm (0.71 in), as listed on page 74. A compressed or broken spring won't maintain detent pressure and will let the selector walk under vibration or load. Also check the shift fork for wear or bending. Follow the self-disengagement and difficult-engagement diagnostics before splitting the transmission.
Manual Section: Transmission - 21Rear axle makes grinding or howling noise under load, louder during heavy draft conditions
Inspect the rear bevel gear set for tooth wear and scoring before suspecting bearings. Verify bevel drive backlash: correct clearance is 0.150-0.300 mm (0.006-0.012 in) per page 252. Backlash outside that range points to shim or bearing preload issues that accelerate gear wear. Follow the load-dependent noise diagnostic, which distinguishes gear mesh noise from bearing noise heard at all speeds.
Manual Section: Rear Axle System - 27Tractor pulls hard to one side when braking, pedals require unequal pressure to stop straight p. 347
Inspect both brake discs for uneven wear, glazing, or oil contamination. Nominal disc thickness is 4.750-4.900 mm (0.187-0.193 in) per page 328; discs below minimum must be replaced as a matched pair, not individually. Check the actuating cam on the dragging side for sticking or binding. Work through the pull-to-one-side sequence in the brakes troubleshooting section on page 347 before adjusting pedal linkage.
Manual Section: Brakes and Controls - 33Frequently Asked Questions
What are the torque specs for the Case IH Farmall 80JXM engine bolts?
For the Case IH Farmall 80JXM, the torque specification for the Master clutch housing to fly-wheel housing buckle up bolts (C1) is 100 N·m (74 lb ft) with a thread size of M12 x 1.25.
What are the replacement specifications for Hydraulic pump assembly?
The hydraulic pump assembly is a gear type, model IP3060 A0008, made by Dynamatics. It has a maximum rated speed of 2300 RPM and a maximum rated output of 45.2 L/min (11.9 US gpm). For testing, a new or reconditioned pump should deliver 27.3 L/min (7.2 US gpm) at 1500 RPM and 207 bar (3002 psi) with VG-68 test oil at 50 °C.
What are the replacement specifications for Clutch disc kit?
For the mechanical version, the transmission clutch plate thickness should be 10.10 - 10.90 mm (0.40 - 0.43 in), with a wear limit travel of 18 mm max. The Power Take-Off (PTO) clutch plate thickness should be 7.30 - 7.90 mm (0.29 - 0.31 in), with a wear limit travel of 7 mm max. Discs should be replaced if rivets are near or flush with the top facing, or if organic facings are soaked with oil.
How do you fix case IH Farmall 80JXM hydraulic system loses pressure after 2-3 hours of field operation, implements slow or won't lift?
Test pump output at 1500 RPM: a used pump must deliver at least 11 L/min (2.9 US gpm) at 166 bar (2407 psi), confirmed on page 396. Below that, pull the pump and inspect for internal wear. Also verify the main lift relief valve opens at 186-191 bar (2697-2770 psi) per page 422. A valve stuck below that range will starve the lift circuit even with a good pump.
What do I get after purchasing this Case IH Farmall 80JXM, Farmall 90JXM?
This is a 667-page searchable PDF ready for immediate download. Works on any device, so pull it up on your phone while you're under the hood. No shipping, no waiting.
Are there any print restrictions on this Case IH Farmall 80JXM, Farmall 90JXM?
No restrictions at all. Print individual pages, full chapters, or the entire manual. The PDF is completely unlocked.
Are hydraulic system diagrams in this Case IH Farmall 80JXM, Farmall 90JXM?
Full hydraulic system diagrams are included, covering circuits, valve locations, and hydraulic component specs for the Case IH Farmall 80JXM, Farmall 90JXM, Farmall® 80JXM, Farmall® 90JXM.
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