All 257 pages of this International Harvester 454, 474, 475, 574, 674, 2400 and 2500 Service Manual (OEM #SM37C) have one job: putting your tractor back to factory condition, regardless of which model you're working on. Inside: hydraulic schematics covering the full fluid circuit from the Multiple Control Valve and Priority Flow Divider through the I.P.T.O. Control Valve, plus page after page of exploded assembly views for the transmission countershaft, Torque Amplifier clutch pack, rear axle differentials, and front steering components. Troubleshooting procedures cover every major system, from C.A.V. fuel injection through the Danfoss steering valve to the I.P.T.O. clutch pack. Work from the Standard Torque Data tables and a specs chapter that calls out engine, transmission, and axle tolerances down to the factory number. Stop chasing specs across three forum tabs. Download now, open the bookmarked PDF on any device, and jump straight to the system that's giving you trouble.
What's Inside This Case IH 454-2500 Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 4-25 | Service Tools, Serial Numbers, Inspection and Repair, Metric Conversion, Standard Torque Data |
| Cooling System | 26-35 | Hoodsheet, Grille Support, Radiator |
| Electrical & Instruments | 36-45 | Battery, Generator, Starting Motor, Headlights, Instruments, Warning and Panel Lights |
| Fuel System | 46-55 | Fuel Tank, Lift Pump (C.A.V. Fuel System), Fuel Filters, Injection Pump, Injectors, Thermostart |
| Engine | 56-63 | Aircleaner |
| Engine Clutch | 64-73 | Clutch Release Bearing |
| Tranismission | 74-111 | Main Shaft, Countershaft, Driving Shaft, Torque Amplifier, Ta Clutch Pack, F/R Clutch Pack |
| Rear Axle Brakes & Differential | 112-135 | Rear Axles, Brake Discs and Piston, Master Cylinder and Equalizer Valve, Parking Brake, Drum Brakes, Differential |
| Front Axle & Steering | 136-163 | Front Hubs, Steering Knuckles, Front Axle, Steering Cylinder, Danfoss Valve, Ross Valve |
| Hydraulic System | 164-219 | Multiple Control Valve, Hydraulic Pumps, I.P.T.O. Control Valve, Priority Flow Divider, Lift Housing, Torque Amplifier and Forward/Reverse Pump |
| P.T.O. & Belt Pulley | 220-233 | P.T.O. Shafts, I.P.T.O. Clutch, Side Drive P.T.O., Belt Pulley |
Case IH 454-2500 Common Problems This Manual Covers
International Harvester 574 hydraulic hitch raises slowly, won't hold implement at working height p. 164
Check hydraulic fluid level and condition; replace immediately if the fluid is dark or milky. Work through the fault-finding guide at page 164. Test lift cylinder seals by raising an implement fully, then letting the tractor sit for 10 minutes on level ground. Creep-down indicates worn control valve spools or leaking cylinder seals.
Manual Section: Hydraulic SystemEngine runs hot or boils over at full field load, temperature gauge pegged high p. 27
Inspect radiator fins for debris and pressure-test the cooling system cap per the service procedures at page 27. Flush the coolant circuit fully and refill with a 50/50 antifreeze-to-water mixture. Check fan belt tension and the water pump for shaft wobble. A stuck-open or stuck-closed thermostat causes the most sudden temperature spikes.
Manual Section: Cooling SystemPTO shaft won't engage at all, or slips under load with implement attached p. 220
Verify the PTO control lever moves fully through its range without binding. Check IPTO clutch hydraulic pressure using the test procedure at page 220 and compare the reading against technical specifications on page 10. Inspect friction plates for glazing if pressure is within range but slippage continues. Adjust the control linkage before opening the clutch pack.
Manual Section: P.T.O. & Belt PulleyEngine won't start or cranks slowly in cold weather, no smoke at exhaust p. 46
Check battery condition and terminal connections at page 36; a weak battery won't drive the starter reliably below 0°C. Verify the fuel lift pump delivers a steady unbroken flow and bleed air from the injection pump and high-pressure lines per page 46. Test the thermostart cold-start element for continuity if cranking is strong but the engine still won't fire.
Manual Section: Fuel SystemBrake pedals feel spongy or tractor pulls to one side under hard braking p. 112
Check master cylinder fluid level and inspect brake lines for seepage. Bleed the hydraulic brake circuit starting at page 112. Verify both pedals engage at the same point in their travel; adjust the linkage until left and right sides engage within 5 mm of each other. Inspect brake discs for glazing or uneven wear if the pull continues after bleeding and equalization.
Manual Section: Rear Axle Brakes & DifferentialSteering wheel requires heavy effort at low speeds or when turning while stationary p. 151
Check hydraulic fluid level first; a low reservoir starves both the steering and lift circuits simultaneously. Test power steering circuit pressure using the troubleshooting procedure at page 151 and compare against technical specifications on page 10. Inspect the priority flow divider for wear, since a failing divider robs the steering of flow before lift. Check the Danfoss or Ross valve for internal bypassing.
Manual Section: Front Axle & SteeringFrequently Asked Questions
How to reset the starter isolating switch on International Harvester tractors models 454, 474, 475, 574, 674?
To adjust the starter isolating switch (safety start switch), loosen bolts (2-7) and reposition the bracket. Ensure that when the clutch pedal is fully depressed, the switch plunger is depressed by 1.27 mm (0.050 in). This procedure ensures the switch operates correctly.
How to reset engine clutch adjustment on International Harvester tractors 454 474 475 574 674?
To adjust the engine clutch, first set the clutch pedal total operating movement to 152 mm (6 in) from the footplate using adjusting screw (3-12). Then, adjust the free travel by loosening locknut (4-12) and holding the release shaft (2-12) so the release bearing touches the release levers. Depress the pedal 44 mm (1.75 in) and adjust rod (5-12) until pin (1-12) aligns. The free travel should be 44 mm (1.75 in), or adjusted to 25.4 mm (1 in) if the former cannot be achieved.
How do you fix International Harvester 574 hydraulic hitch raises slowly, won't hold implement at working height?
Check hydraulic fluid level and condition; replace immediately if the fluid is dark or milky. Work through the fault-finding guide at page 164. Test lift cylinder seals by raising an implement fully, then letting the tractor sit for 10 minutes on level ground. Creep-down indicates worn control valve spools or leaking cylinder seals.
How do you fix engine runs hot or boils over at full field load, temperature gauge pegged high?
Inspect radiator fins for debris and pressure-test the cooling system cap per the service procedures at page 27. Flush the coolant circuit fully and refill with a 50/50 antifreeze-to-water mixture. Check fan belt tension and the water pump for shaft wobble. A stuck-open or stuck-closed thermostat causes the most sudden temperature spikes.
What do I get after purchasing this International Harvester 454 & variants manual?
You get a 257-page searchable PDF that downloads instantly after checkout. Open it on your laptop, tablet, or phone, and bring it right to the shop floor.
Can I print specific sections of this International Harvester 454 & variants Service Manual?
The PDF is DRM-free. Print whatever sections you need to take out to the shop. Standard letter or A4 paper works.
Does this International Harvester 454 & variants Service Manual cover the hydraulic system?
Yes, this International Harvester 454 & variants Service Manual includes hydraulic system diagrams, circuit schematics, and component specifications.
Reviews
There are no reviews yet.