1991 Case 1845c Bolt Sizes & Torque Specs

Free OEM-referenced torque and bolt specs for the 1991 Case 1845c.

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?

Manufacturer-specified torque values for the 1991 Case 1845c are in the factory service manual or owner's handbook. WhatSizeBolt sources values from manufacturer literature and verifies against community data — if we do not have this exact year listed, check the Case brand page for the closest model year.

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

Most modern Case vehicles use a 19mm or 21mm socket. Older Case models from before 2000 may use a 13/16" SAE socket on certain trims. Confirm against the actual lug before purchasing aftermarket wheels.

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 34 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 drive motor, the drive sprocket bolt torques to 275 ft-lbs (24mm drive, M16x2.0 thread). For the chain case, plan for a 19mm tool on a M14x2.0 stud; final torque is 110 ft-lbs (drive motor bolt). Chain case cover bolt tightens to 25 ft-lbs, takes a 13mm driver, runs on M8x1.25 threads, located 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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