Part of the Case IH Repair Manuals.
Electrical gremlins park more of these combines mid-harvest than anything mechanical, which is why over a third of this 826 page Case IH CT5050 to CT5080 series repair manual PDF (OEM 84099130) is devoted to wiring, troubleshooting, and monitor calibration across all four models. Factory wiring diagrams trace the starter circuit, hydrostatic drive control, and grain tank level sensing wire by wire, while hydraulic schematics map the stack valves and cylinders behind your header lift and reel drive. Threshing, cleaning, grain storage, and a complete engine overhaul section fill out the rest. Set wobble box bearing adjustment between 0.5 and 1 Nm, and check cleaning fan belt depth at 40 mm on the drive side before the season starts. Misread a hydrostatic fault and you buy a pump the machine never needed. Bookmarked and keyword friendly, with serial number breakdowns so your first parts order is the right one.
What's Inside This Case IH CT5050, CT5060, CT5070, CT5080 Repair Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | 7-18 | Explanation of Machine and Header Serial Numbers, Notes for Service Parts Catalogue Consulting, Tightening Torques |
| Traction and Steering Axle | 19-64 | Traction Gearbox, Brakes, Final Drives, Steering Axles |
| Grain Header | 65-84 | Reel, Knife and Wobble Box, Feed Auger |
| Straw Elevator | 85-100 | Straw Elevator Chain, Upper Shaft, Bottom Shaft |
| Threshing | 101-112 | Concave Specifications, Concave Adjustments, Drum Variator |
| Separation | 113-132 | Separating Concaves, Intermediate Shaft, Beater Shaft, Straw Walkers and Straw Walker Shafts |
| Cleaning | 133-162 | Cleaning Fan and Variator, Cleaning Shoe Drive, Upper Screen Box, Lower Screen Box |
| Grain Storage | 163-200 | Unloading System, Clean Grain Transport System, Grain Elevator and Chain, Return System |
| Engine | 201-324 | Specifications, Description and Operation, Engine Overhaul |
| Airconditioning | 325-336 | Airconditioning Circuit, Ventilation Unit, Compressor Clutch Replacement |
| Hydraulic System | 337-390 | Hydraulic Components, Stack Valves, Hydraulic Cylinders |
| Hydrostatic System | 391-468 | Hydrostatic Pump, Hydrostatic Motor, Powered Rear Wheel Drive |
| Electrical System - General Information | 469-494 | Wiring Diagrams, Wire Identification, Fuses, Symbols, Connectors |
| Electrical System - Location of Main Components | 495-516 | Modules, PCBs, Monitors, Switches, Relays, Lighting |
| Electrical System - Wiring Diagrams | 517-578 | Starter Circuit, Hydrostatic System, Engine Throttle Control, Engine Protection, Grain Tank Level |
| Electrical System - Troubleshooting | 579-738 | Hydrostatic Drive, Throttle Control, Straw Chopper Engagement, Unloading Auger Position Control, Header Swing |
| Electrical System - Calibrations | 739-826 | InfoView Monitor, Header Height Control, Ground Speed, Returns Constant, Self-Diagnostic Error Reports |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Torque D | 80 Nm | p. 47 |
| Torque E | 100 Nm | p. 47 |
| Wobble box bearing adjustment torque | 0.5 to 1 Nm | p. 71 |
| Straw elevator weight | 1000 kg | p. 86 |
| Belt depth at drive side | 40 mm | p. 137 |
| Clearance between half shaft O and tube N | 2 mm | p. 165 |
| Auger adjustment dimension | 65.5 mm | p. 165 |
| Distance A for grass seed thrower plates | 6 mm | p. 165 |
| Traction Gearbox Oil Capacity | 15 litres | p. 20 |
| Traction Gearbox Oil Viscosity | SAE 80W-90 | p. 20 |
| CT5050 | ||
| Final Drive Capacity (Gear ratio 10/75) | 5 litres | p. 46 |
| CT5070-CT5080 | ||
| Final Drive Capacity (Gear ratio 11/111) | 7.2 litres | p. 46 |
Case IH CT5050, CT5060, CT5070, CT5080 Common Problems This Manual Covers
Case IH CT5050 straw elevator chain runs crooked and jumps off, crop feeding unevenly
Inspect the upper drive sprocket for hooked or worn teeth before blaming the chain; a worn sprocket will throw a new chain within a day. Replace chain and sprocket together using the straw elevator procedures starting on page 85. Rig a hoist before unbolting anything; the complete straw elevator weighs 1000 kg (page 86).
Manual Section: Straw Elevator p. 85Cracked grain in the tank and kernels riding over into the tailings return
Check fan speed and sieve openings before harvest pressure forces guesswork. Inspect the cleaning fan variator belt for slippage: measure belt depth at 40 mm on the drive side and 53 mm on the driven side, with a minimum 1 mm gap between sheaves (page 137). Retorque bolt I to 50 Nm after any adjustment.
Manual Section: Cleaning p. 137Knife drive knocking and wobble box vibration at full throttle, header cutting ragged
Drain the wobble box and check for metal in the oil. Set bearing preload per the procedure on page 71; rolling torque should read 0.5 to 1 Nm. Torque the knife drive arm nut to 21 daNm (page 76) and the wobble box drive pulley nut to 150 Nm (page 77), then run at full throttle and recheck.
Manual Section: Grain Header p. 71Unloading auger vibrates and hammers while emptying the grain tank on the move
Inspect the unloading tube universal joint for play and replace it if the crosses are notchy. Adjust the auger to the 65.5 mm dimension shown on page 165, adding shims until clearance between the half shaft and tube measures 2 mm maximum. Grease the joint and test unload a full tank before the trucks line up.
Manual Section: Grain Storage p. 165Engine runs hot in heavy crop, temperature gauge climbing during long unloading runs
Blow out the rotary dust screen and radiator core from the engine side outward, every day in dry straw. Pressure test the cap and check thermostat operation; the water pump should move 340.6 L/min at rated engine speed (page 275). Confirm oil level while you are there; the 6 cylinder engine holds 23.0 litres (page 208).
Manual Section: Engine p. 275Frequently Asked Questions
What is the cylinder head bolt tightening torque for the 7.5L CNH engine in the Case IH CT5050, CT5060, CT5070, CT5080?
The cylinder head bolts on the 7.5L CNH engine should be tightened in stages. Stage 1 is 55 Nm (40 lbf ft), Stage 2 is 95 Nm (70 lbf ft), and Stage 3 is a further 90° using a torque angle gauge. p. 236
What is the oil capacity of the 7.5L CNH engine in the Case IH CT5050, CT5060, CT5070, CT5080 combine?
The crankcase oil capacity for the 6-cylinder 7.5L CNH engine is 23 litres, including the filters. p. 202
What is the correct oil specification for the Case IH CT5050, CT5060, CT5070, CT5080 traction gearbox?
The traction gearbox requires 15 litres of oil meeting the CASE Gear Oil specification, specifically API-GL-5 or MIL-L-2105 D, with a viscosity grade of SAE 80W-90. p. 20
What is the oil capacity for the final drives with a 10/75 gear ratio on a Case IH CT5050, CT5060, CT5070, CT5080?
For final drives with a 10/75 gear ratio, the capacity is 5 litres each. p. 46
How often should the traction gearbox oil be changed?
The traction gearbox oil should be changed after the first 100 operating hours, then after 200 operating hours, and thereafter every 400 operating hours or annually. p. 20
How is this Case IH CT5050–CT5080 Series Repair Manual delivered?
All 826 pages arrive as one searchable PDF at checkout. Read it at the desk, then take the phone out to the machine.
Can I print specific sections of this Case IH CT5050–CT5080 Series manual?
Yes. No DRM, nothing blocks printing, so run off the pages you need on whatever printer you have.
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