All 246 pages of this Case IH Agriculture S4Q2, S4Q Service Manual (OEM #47372932) target one job: rebuilding and diagnosing the S4Q and S4Q2 engines to factory spec. Inside, you get a full torque table covering every critical fastener, exploded views across ten sections for precise component identification, and step-by-step teardown and assembly procedures spanning the complete engine and crankcase. The electrical systems section closes out with fuel injection system overviews, injection control solenoid installation, and starter specifications. Torque the cylinder head bolts to 113–123 N·m, then set connecting rod caps to 49–59 N·m — if your numbers don't match, this manual tells you exactly why. Your engine is apart on the stand. Get the right factory answer instead of a forum guess. Download, search by keyword, and bring it straight to the bench.
What's Inside This Case IH S4Q2, S4Q, S4Q-Y161GT, S4Q2-Y161GT Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | 3-18 | Foreword - Ecology and the Environment, Safety Rules, Personal Safety, Basic Instructions - Important Notice Regarding Equipment Servicing |
| Valves - Remove | 19-44 | Engine - Overview, Engine - General Specification, Engine and Crankcase, Engine - Torque, Crankcase - General Specification, Cylinder Heads, Engine - Testing - Compression Pressure, Crankcase - Inspect |
| Crankshaft - Inspect | 45-76 | Engine Oil Pan - Install, Valves - Inspect, Valves Seal - Install, Valves Seal - Remove, Valves - Clearance, Valves - Install, Valves Spring - Inspect, Pan and Covers |
| Crankshaft Oil Seal Front Seal - Install | 77-94 | Crankshaft Pulley - Inspect, Crankshaft Rear Wear Sleeve - Install, Crankshaft - Install, Crankshaft Rear Wear Sleeve - Remove, Crankshaft Gears - Install, Crankshaft Gears - Remove, Crankshaft Pulley - Remove, Engine Flywheel - Disassemble |
| Rocker Shaft - Install | 95-133 | Connecting Rod and Piston - Inspect, Connecting Rods and Pistons - General Specification, Connecting Rods and Pistons, Connecting Rod and Piston - Remove, Connecting Rods and Pistons - Exploded View, Connecting Rod and Piston - Disassemble, Valve Drive and Gears, Connecting Rod and Piston - Install |
| Fuel Injection System - Overview | 134-162 | Camshaft - Inspect, Camshaft Push Rod - Install, Camshaft Tappets - Inspect, Camshaft Push Rod - Inspect, Camshaft Tappets - Install, Camshaft - Remove, Camshaft - End Play, Balancer - Remove |
| Fuel Injection System - Testing - Idling Malfunction | 163-180 | Fuel Injectors - Pressure Test, Fuel Injection System - Timing Check, Fuel Injection System - Bleed, Fuel Injectors - Remove, Fuel Injectors - Disassemble, Injection Pump - Timing Adjust, Injection Pump - Remove, Fuel Injectors - Assemble |
| Engine Oil Pump - Inspect | 181-196 | Intake and Exhaust Manifolds and Muffler - Overhaul, Intake and Exhaust Manifolds and Muffler, Intake and Exhaust Manifolds and Muffler - Overview, Engine Lubrication System - Complete, Engine Lubrication System, Engine Lubrication System - General Specification, Engine Oil Pump - Remove, Oil Pressure Valve - Inspect |
| Coolant Thermostat - Test | 197-208 | Engine Cooling System - Overview, Engine Oil Pump - Install, Engine Oil Pump - Assemble, Engine Cooling System, Engine Cooling System - General Specification, Water Pump - Inspect |
| Electrical Systems | 209-246 | Fuel Injection System, Injection Control Solenoids - Overview, Injection Control Solenoids - Install, Engine Starting System, Engine Starter - General Specification |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Cylinder head torque | 113 - 123 N·m (83 - 91 lb ft) | p. 23 |
| Rocker cover torque | 11 - 13 N·m (8 - 10 lb ft) | p. 23 |
| Thermostat valve starts opening temperature | 76.5±1.5 °C (170±2.7 °F) | p. 203 |
| Thermostat valve lift temperature (more than 8 mm) | 90 °C (194 °F) | p. 203 |
| Oil pump clearance between rotors and cover (Assembly standard) | 0.04 - 0.09 mm (0.0016 - 0.0035 in) | p. 189 |
| Oil pump clearance between rotors and cover (Service limit) | 0.25 mm (0.0059 in) | p. 189 |
| Injection nozzle valve opening pressure (Nominal Size) | 11770 kPa (1710 psi) | p. 161 |
| Injection nozzle valve opening pressure (Assembly standard) | 11770 - 12750 kPa (1710 - 1850 psi) | p. 161 |
| Water pump fit (interference) of bearing unit in case (Assembly standard) | -0.026 - -0.064 mm (-0.00102 - -0.00252 in) | p. 203 |
| Oil filter torque | 11 - 13 N·m (8 - 10 lb ft) | p. 23 |
| Oil filter type | Spin-on cartridge of paper-element | p. 21 |
| Engine oil pressure at rated rpm (Assembly standard) | 196 - 392 kPa (28 - 57 psi) | p. 21 |
Case IH S4Q2, S4Q, S4Q-Y161GT, S4Q2-Y161GT Common Problems This Manual Covers
Case IH S4Q2 low oil pressure warning activates, engine shuts down unexpectedly p. 189
Check oil level first, then measure pressure at rated RPM. Normal range is 196-392 kPa (28-57 psi); the repair limit drops to 147 kPa (21.3 psi), as shown on page 21. If pressure is low, inspect the oil pump rotor-to-cover clearance on page 189. Service limit is 0.25 mm (0.0059 in). Replace the pump if exceeded.
Manual Section: Engine Oil Pump InspectionEngine overheats repeatedly after short runtime, coolant temperature warning activates, shuts down p. 203
Test the thermostat by submerging it in water and heating to 76.5±1.5°C (170±2.7°F); it should begin opening at that temperature and lift at least 8 mm by 90°C (194°F), per page 203. Also check coolant level, as the water jacket holds 3.7 L. Inspect the water pump for leaks and bearing play before reinstalling.
Manual Section: Coolant Thermostat TestEngine won't start or turns over slowly in cold weather, glow plugs suspected p. 21
Inspect the glow plug circuit: measure resistance at each plug with an ohmmeter and check current draw during preheat. Reference starter specifications on page 21; rated output is 12 V, 2.2 kW. If the starter overheats or cranks slowly, check for voltage drop across the battery cables. Verify fuel flow is reaching the injectors before chasing electrical faults.
Manual Section: Engine Starting System TestingEngine produces excessive black smoke and loses power at full throttle, injectors suspected
Test each fuel injection nozzle on a nozzle tester. Opening pressure must be 11770-12750 kPa (1710-1850 psi) per page 161; a nozzle below that range sprays poorly and causes black smoke. Torque replacement nozzles to 53-65 N·m (39-47 lb ft) per page 23. Verify injection timing per the troubleshooting guide.
Manual Section: Fuel Injection System TestingEngine misfires at idle, rough running, compression loss on one or more cylinders p. 21
Measure valve clearance cold at the rocker cover. Correct clearance is 0.25 mm for both intake and exhaust per page 21. Fire the cylinders in order 1-3-4-2 to sequence your adjustments. If clearance is correct but compression still drops, check cylinder bore wear and inspect the head gasket for leaks.
Manual Section: Engine Problem Solving & TestingFrequently Asked Questions
Torque specs for CASE III AGRICULTURE S4Q engine bolts?
For the CASE III AGRICULTURE S4Q engine, specific torque specifications for major bolts and nuts are provided. For example, cylinder head bolts (M12 x 1.75) should be torqued to 113 - 123 N·m (83 - 91 lb ft), and connecting rod cap bolts (M10 x 1) to 49 - 59 N·m (36 - 44 lb ft). The crankshaft pulley (M24 x 1.5) requires a torque of 382 - 402 N·m (282 - 296 lb ft).
What are the replacement specifications for Thermostat (due to overheating failures)?
The thermostat should be replaced if it does not start opening at the correct temperature of 75 - 78 °C (167 - 173 °F), or if the valve lift is not more than 8 mm (0.3 in) at 90 °C (194 °F). These specifications are crucial for proper engine cooling system function.
What are the replacement specifications for Oil pump (due to low pressure issues)?
For the oil pump, replacement is necessary if the clearance between the rotors and cover exceeds the service limit of 0.25 mm (0.0059 in). Additionally, if the clearance between the outer rotor and case exceeds its service limit of 0.500 mm (0.01969 in), the pump assembly should be replaced.
How do you fix case IH S4Q2 low oil pressure warning activates, engine shuts down unexpectedly?
Check oil level first, then measure pressure at rated RPM. Normal range is 196-392 kPa (28-57 psi); the repair limit drops to 147 kPa (21.3 psi), as shown on page 21. If pressure is low, inspect the oil pump rotor-to-cover clearance on page 189. Service limit is 0.25 mm (0.0059 in). Replace the pump if exceeded.
What do I get after purchasing this Case Iii Agriculture S4 Series manual?
Instant PDF download. You get the full 246-page searchable Service Manual immediately after payment. Open it on your laptop, tablet, or phone right in the shop.
Are there any print restrictions on this manual?
The PDF is DRM-free. Print whatever sections you need to take out to the shop. Standard letter or A4 paper works.
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