1991 Case 1845c Lug Nut Torque & Bolt Specs

The 1991 Case 1845c lug nut torque is 125 ft-lbs, tightened with a 19mm socket on M14x1.5 studs. Torque in a star pattern in two passes (snug, then final), and re-check after the first 50–100 miles of driving. Use a calibrated torque wrench — not an impact gun — for the final pass.

Lug nut torque: 125 ft-lbs · Socket size: 19mm · Thread: M14x1.5.

This page is the OEM-referenced fastener summary for the 1991 Case 1845c. Use it before any maintenance or repair job where torque values matter — brake work, wheel changes, suspension service, engine teardowns, or oil changes. Specs are pulled from manufacturer service literature, cross-checked against community data, and updated as new chassis variants become available.

For the 1991 Case 1845c, fasteners follow SAE inch standards typical of 1990s-era Case engineering. Always confirm spec against the factory service manual before tightening safety-critical fasteners (suspension, brake, steering, head bolts).

Common fastener categories on the 1991 Case 1845c

Wheel / lug nut torque and thread spec (covered above)
Brake caliper bracket bolts (typically 80-130 ft-lbs) and slide/guide pins (18-35 ft-lbs)
Engine oil drain plug torque — rarely above 30 ft-lbs; always use a new crush washer
Transmission pan, valve cover, and intake manifold bolts (low torque, often 89-106 in-lbs)
Suspension control arm, sway bar, tie rod end and ball joint torque
Spark plug torque (typically 10-15 ft-lbs on aluminum heads — do not exceed)
Differential cover bolts (RWD/4WD only) and transfer case fasteners

Repair guidance for this model year

Heads up for 1991 Case 1845c owners: Vehicles this age frequently have seized fasteners due to thread corrosion. Apply penetrating oil (PB Blaster, Kroil) 24 hours before any wrenching, and have a thread chaser on hand. Lug studs are particularly prone to thread damage at this age; if a nut spins on without engaging, the stud is stretched and must be replaced before the wheel goes back on.

Tools you will need

SAE socket set (1/4"-7/8"), 6-point impact-rated
Calibrated torque wrench (10-150 ft-lbs covers most automotive jobs; add a 0-250 ft-lbs wrench for truck lug nuts)
Breaker bar (24" minimum) for initial loosening
Penetrating oil (PB Blaster or Kroil) for any fastener over 5 years old
Anti-seize on stainless or dissimilar-metal threads; thread-locker (Loctite blue) on critical reassembly

Frequently asked questions

What is the lug nut torque on a 1991 Case 1845c?

The OEM-specified lug-nut torque for the 1991 Case 1845c is 125 ft-lbs, using a 19mm socket on M14x1.5 thread studs. Use a calibrated torque wrench in a star pattern, in two passes (50% and 100%), and re-check after 50-100 miles of driving.

What socket size do I need for the 1991 Case 1845c lug nuts?

The 1991 Case 1845c uses a 19mm socket. A 6-point impact-rated socket is recommended over a 12-point chrome socket — 12-points round off lug nuts under impact-driver use.

Are the 1991 Case 1845c fasteners metric or SAE?

SAE inch is the standard for this vehicle. Most fasteners on this vehicle are SAE inch, common sizes 1/4", 5/16", 3/8", 7/16", 1/2". Bolt-head markings are the fastest way to confirm grade and material at the bench.

Other Case 1845c years

Same model, different model year — fastener spec may change. Always confirm against the year for your VIN.

→ 1991 Case 1845c oil drain plug torque & size

All 35 1991 Case 1845c fastener specs

Per-bolt torque, wrench size, and thread spec for the 1991 Case 1845c, sourced from OEM service literature and verified against community shop data. Values pair imperial (ft-lb) and metric (Nm) where the manufacturer publishes both.

Engine — 1991 Case 1845c

Engine bolt-by-bolt torque for the 1991 Case 1845c, including the long block, valve covers, and intake. For the oil pan, plan for a 17mm tool on a M14x1.5 stud; final torque is 45 ft-lbs (oil drain plug). Valve cover bolt tightens to 8 ft-lbs, takes a 10mm driver, runs on M6x1.0 threads, located at the valve cover. The fan pulley bolt uses a 19mm drive on a M14x1.5 thread, torqued to 85 ft-lbs at the crankshaft. At the engine block, the injection pump bolt torques to 65 ft-lbs (17mm drive, M12x1.75 thread).

Body — 1991 Case 1845c

Body fasteners on the 1991 Case 1845c. Door hinge bolt tightens to 25 ft-lbs, takes a 13mm driver, runs on M8x1.25 threads, located at the cab frame. The belly pan bolt uses a 13mm drive on a M8x1.25 thread, torqued to 25 ft-lbs at the frame. At the floor, the seat base bolt torques to 65 ft-lbs (17mm drive, M12x1.75 thread). For the frame, plan for a 24mm tool on a M16x2.0 stud; final torque is 185 ft-lbs (rops bolt).

Electrical — 1991 Case 1845c

Electrical fasteners on the 1991 Case 1845c. The starter solenoid terminal nut uses a 10mm drive on a M6x1.0 thread, torqued to 70 in-lbs at the solenoid. At the block, the starter ground strap bolt torques to 8 ft-lbs (10mm drive, M6x1.0 thread). For the block, plan for a 12mm tool on a M8x1.25 stud; final torque is 22 ft-lbs (alternator support bracket bolt). Alternator adjustment bolt tightens to 22 ft-lbs, takes a 12mm driver, runs on M8x1.25 threads, located at the bracket. The belt tensioner lock bolt uses a 12mm drive on a M8x1.25 thread, torqued to 22 ft-lbs at the tensioner body. At the bracket, the idler pulley bolt torques to 35 ft-lbs (15mm drive, M10x1.5 thread). For the alternator, plan for a 10mm tool on a M6x1.0 stud; final torque is 70 in-lbs (alternator terminal nut). Starter heat shield bolt tightens to 8 ft-lbs, takes a 10mm driver, runs on M6x1.0 threads, located at the starter body. The alternator ground strap bolt uses a 10mm drive on a M6x1.0 thread, torqued to 8 ft-lbs at the block. At the starter, the starter b+ terminal nut torques to 15 ft-lbs (13mm drive, M8x1.25 thread). For the bracket, plan for a 14mm tool on a M10x1.5 stud; final torque is 25 ft-lbs (34 Nm) (alternator pivot bolt). Starter support bracket bolt tightens to 22 ft-lbs, takes a 12mm driver, runs on M8x1.25 threads, located at the block/transmission. The starter mounting bolt uses a 14mm drive on a M10x1.25 thread, torqued to See sequence at the bell housing. At the alternator, the alternator b+ terminal nut torques to 15 ft-lbs (13mm drive, M8x1.25 thread). For the block, plan for a 15mm tool on a M10x1.5 stud; final torque is 35 ft-lbs (belt tensioner pivot bolt).

Drive — 1991 Case 1845c

Drive fasteners on the 1991 Case 1845c. At the chain case, the chain case cover bolt torques to 25 ft-lbs (13mm drive, M8x1.25 thread). For the drive motor, plan for a 24mm tool on a M16x2.0 stud; final torque is 275 ft-lbs (drive sprocket bolt). Wheel bolt tightens to 125 ft-lbs, takes a 19mm driver, runs on M14x1.5 threads, located at the wheel hub. The drive motor bolt uses a 19mm drive on a M14x2.0 thread, torqued to 110 ft-lbs at the chain case.

Hydraulic — 1991 Case 1845c

Hydraulic fasteners on the 1991 Case 1845c. For the various, plan for a 22mm tool on a M16x1.5 stud; final torque is 45 ft-lbs (hydraulic line fitting). Hydraulic motor bolt tightens to 85 ft-lbs, takes a 17mm driver, runs on M12x1.75 threads, located at the motor mount. The hydraulic pump bolt uses a 13mm drive on a M8x1.25 thread, torqued to 35 ft-lbs at the pump mount. At the valve block, the control valve bolt torques to 25 ft-lbs (13mm drive, M8x1.25 thread).

Loader — 1991 Case 1845c

Loader fasteners on the 1991 Case 1845c. Loader arm pivot pin tightens to N/A — Press Fit, takes a 32mm driver, runs on Press Fit threads, located at the frame. The cylinder pin lock uses a 19mm drive on a M14x2.0 thread, torqued to 110 ft-lbs at the cylinder end. At the loader arms, the bucket pivot pin torques to N/A — Press Fit (27mm drive, Press Fit thread). For the attachment plate, plan for a 24mm tool on a Press Fit stud; final torque is N/A — Press Fit (quick attach pin).

New to torquing wheels? Read our How lug nut torque works — the complete guide for star-pattern sequence, re-torque intervals, and how to read a lug spec — then use the 1991 Case 1845c numbers above.

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