Part of the Case IH Operator Manuals.
This 123-page Case IH Farmall 40, 45, 50 Operator Manual (OEM #87398624) puts the factory operating and maintenance procedures for your 12x12 gear transmission tractor right in your hands. You get wiring diagrams for tracing electrical faults, hydraulic controls for the lift and remote circuits, a full safety decal reference, and a lubrication and maintenance section covering every fitting and filter on the machine. Run the Air Cleaner Primary Element cleaning at 100-hour intervals with 30 PSI or less, and drain the fuel filter every 100 hours to keep contaminants out of your injection system. No more flipping through a torn-up shop copy or guessing at your hydraulic oil spec (it's Hy-Tran Ultra, straight from the book). Bookmarked by section so you can jump from Operation straight to Specifications without hunting, this PDF opens on your phone, tablet, or laptop and rides along in the cab.
What's Inside This Case IH Farmall 40, Farmall 45, Farmall 50 Operator Manual
| System | Pages | Key Topics |
|---|---|---|
| Farmall 40, 45, 50 Tractors with 12x12 Gear Transmission Operator's Manual | 1 | Farmall 40, 45, 50 Tractors, 12x12 Gear Transmission |
| To the Owner | 1 | Adjustment and Maintenance, Proper Care and Operation, General Operation, Genuine Service Parts, Model Identification Number, Product Identification Number |
| Improvements | 2 | Product Improvements, Product Changes, Equipment Sold Previously |
| Precautionary Statements | 7 | Danger, Warning, Caution, Personal Safety, Machine Safety |
| Personal Safety | 6 | Danger, Warning, Caution, Hazardous Situation, Death or Serious Injury, Bodily Injury or Death |
| Machine Safety | 6 | Precautionary Statement, Specific Instructions, Minor Machine Damage |
| Information | 7 | - |
| Safety | 7-8 | Precautionary Statements, The Tractor, Servicing the Tractor, Operating the Tractor, Driving the Tractor, Safety Frame (ROPS) |
| Safety Decals | 11-15 | Drawbar Warning, ROPS Warning, Engine Start Warning, Rotating Parts Warning, Cooling System Warning, Battery Safety |
| Ecology and the Environment | 16 | Fuel Handling, Waste Oil Disposal, Coolant Disposal, Air Conditioning System, Leak Repair, Environmental Precautions |
| Universal Symbols | 17 | Engine, Transmission, PTO, Hydraulic, Warning, Lighting |
| General Information | 18-21 | Product Identification, Hardware Tightening Torques, Metric Hardware, Inch Hardware, Cap Screws, Locknuts |
| Operation | 22-55 | Seat, ROPS, Instrument Panel, Key Switch, Transmission, Hydraulic Controls |
| Lubrication and Maintenance | 56-103 | Lubrication Fittings, Engine Oil, Fuel Filter, Air Cleaner, Cooling System, Electrical System |
| Specifications | 104-117 | Engine, Capacities, Cooling System, Electrical System, Fuel System, Transmission |
| Delivery Report | 120-123 | Tire Pressure, Air Cleaner, Coolant Level, Fan Belt Tension, Battery, Engine Oil Level |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Air Cleaner Primary Element cleaning interval | Every 100 hours of service | p. 66 |
| Air Cleaner Primary Element cleaning air pressure | low air pressure (30 PSI or less) | p. 66 |
| Fuel Filter draining interval | every 100 hours of operation | p. 63 |
| Fuel Filter Element check interval | Every 100 Hours | p. 58 |
| Hydraulic Oil Type | Hy-Tran Ultra | p. 57 |
| Hydraulic Oil Low Temp Type | Low Temp Hy-Tran Ultra | p. 57 |
| Coolant Type | Ethylene. Coolant Concentrate | p. 57 |
| Coolant Mixture | 50/50 solution of ethylene glycol antifreeze and water | p. 69 |
| Battery Type | BCI group 47, 12-volt battery | p. 74 |
| Battery Cold Cranking Amps | 600 amps at -18°C (0°F) | p. 74 |
| Alternator Rating | 12-volt, Heavy Duty, 40 amps | p. 105 |
| Alternator Fuse Size | 7.5 amp | p. 76 |
Case IH Farmall 40, Farmall 45, Farmall 50 Common Problems This Manual Covers
Case IH Farmall 45 coolant temperature warning light illuminates during field work p. 25
Check the warning light indicator table on page 25 to confirm which light is active. Verify coolant level in the overflow tank and inspect for a 50/50 ethylene glycol mixture as specified on page 69. Farmall 45 cooling system holds 8.0 liters (8.4 U.S. qts); top off to the correct level and inspect the radiator fins for debris blockage.
Manual Section: Engine Oil Pressure Warning Light / Temperature GaugeLoader hydraulics respond slowly when raising or lowering the bucket during operation p. 67
Check the hydraulic oil level per the schedule on page 67 (every 50 hours of operation) and verify the fluid is Hy-Tran Ultra as listed on page 57. Cold or low fluid slows cylinder response. Fill to the correct level, let the system warm up, and confirm smooth operation returns before resuming loader work.
Manual Section: Lubrication and MaintenanceMFWD switch fails to engage front axle drive after repeated activation attempts p. 76
Check the operator controls layout on page 25 to confirm switch position and warning indicator response. Inspect the fuse block covered on page 76; the alternator circuit fuse is rated 7.5 amp, and a blown fuse elsewhere in that block can cut power to the MFWD relay. Replace with a correctly rated fuse and retest engagement.
Manual Section: Alternator / Fuse Block / Main FuseBattery loses charge overnight after tractor sits parked and unused for several days p. 74
Check battery cable connections and electrolyte level per the interval on page 74 (every 50 hours of operation). Confirm the battery is the correct BCI group 47, 12-volt unit rated 600 amps cold cranking at -18°C (0°F). Clean corroded terminals, tighten clamps, and fully charge the battery before parking longer than two weeks.
Manual Section: Battery / Electrolyte LevelEngine loses power under load and exhaust smoke increases during heavy field work p. 66
Inspect the primary air cleaner element per the schedule on page 66: clean every 100 hours of service using low air pressure of 30 PSI or less. Replace the inner safety element every third primary cleaning or after 1000 hours per page 67, whichever comes first. A clogged element restricts airflow and cuts power under load.
Manual Section: Air Cleaner MaintenanceFrequently Asked Questions
What are the replacement specifications for Air filters?
The manual specifies cleaning the primary air cleaner element after every 100 hours of service. The inner safety element should be installed new every third primary element change or after every 1000 hours of operation, whichever comes first. No specific part numbers for replacement elements are provided.
What are the replacement specifications for Fuel filters?
The fuel filter should be drained after every 100 hours of operation, and the fuel filter element should be changed after every 100 hours of operation. The manual instructs to install a new element but does not provide specific part numbers or detailed specifications for the replacement part.
What is the engine oil capacity and recommended oil type for the Farmall 40, 45, 50 tractors?
The combined capacity of the engine crankcase and oil filter is 6.0 liters (6.3 U.S. qts). The tractors are originally shipped with SAE 10W30 oil, but other recommended oils include SAE 30, SAE 15W40, and SAE 5W30, depending on ambient temperature.
What is the cooling system capacity and recommended antifreeze type for the Farmall 40, 45, 50 tractors?
The cooling system capacity for the Farmall 40 is 7.9 liters (8.3 U.S. qts), and for Farmall 45 and 50, it is 8.0 liters (8.4 U.S. qts). The system should always be filled with a 50/50 solution of ethylene glycol antifreeze and water.
How will I receive this Case IH Farmall 40, 45, 50 Operator Manual?
Immediate download of the complete 123-page searchable Operator Manual. Access it on any device, from a laptop at your desk to a phone in the field.
Are there any print restrictions on this Case IH Farmall 40, 45, 50 manual?
Yes, print as many copies as you want, and there are no restrictions. Many mechanics print the section they need and bring it to the shop floor.
Does this Case IH Farmall 40, 45, 50 Operator Manual have electrical diagrams?
Yes, an electrical wiring diagram is included to help trace the main circuits.
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