1986 Case 170b Bolt Sizes & Torque Specs

Free OEM-referenced torque and bolt specs for the 1986 Case 170b.

This page is the OEM-referenced fastener summary for the 1986 Case 170b. 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 1986 Case 170b, fasteners follow SAE inch standards typical of classic 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 1986 Case 170b

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 1986 Case 170b 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 1986 Case 170b?

Manufacturer-specified torque values for the 1986 Case 170b 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 1986 Case 170b 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 1986 Case 170b 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 170b years

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

→ 1986 Case 170b engine & transmission mount torque specs

All 18 1986 Case 170b fastener specs

Per-bolt torque, wrench size, and thread spec for the 1986 Case 170b, 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 — 1986 Case 170b

Engine bolt-by-bolt torque for the 1986 Case 170b, including the long block, valve covers, and intake. At the frame, the engine mount bolt torques to See sequence (19mm drive, M14x2.0 thread). For the block, plan for a 17mm tool on a M12x1.75 stud; final torque is 85 ft-lbs (engine support bracket).

Hydraulic — 1986 Case 170b

Hydraulic fasteners on the 1986 Case 170b. For the frame, plan for a 19mm tool on a M14x2.0 stud; final torque is 110 ft-lbs (hydraulic tank mount). Hydraulic motor mount tightens to 185 ft-lbs, takes a 24mm driver, runs on M18x2.5 threads, located at the swing frame. The main pump mount bolt uses a 19mm drive on a M14x2.0 thread, torqued to See sequence at the bell housing. At the frame, the control valve mount torques to 85 ft-lbs (17mm drive, M12x1.75 thread).

Drive — 1986 Case 170b

Drive fasteners on the 1986 Case 170b. Idler mount bolt tightens to 185 ft-lbs, takes a 24mm driver, runs on M18x2.5 threads, located at the track frame. The track motor mount uses a 24mm drive on a M18x2.5 thread, torqued to 185 ft-lbs at the track frame. At the hub, the sprocket bolt torques to See sequence (24mm drive, M18x2.5 thread).

Cooling — 1986 Case 170b

Cooling fasteners on the 1986 Case 170b. The water pump mount uses a 13mm drive on a M8x1.25 thread, torqued to 22 ft-lbs at the block. At the radiator, the fan shroud bolt torques to 22 ft-lbs (13mm drive, M8x1.25 thread).

Structure — 1986 Case 170b

Structure fasteners on the 1986 Case 170b. At the frame, the boom foot pin lock torques to 185 ft-lbs (24mm drive, M18x2.5 thread). For the housing, plan for a 17mm tool on a M12x1.75 stud; final torque is 85 ft-lbs (swing gear case). Swing bearing bolt tightens to See sequence, takes a 24mm driver, runs on M18x2.5 threads, located at the frame. The swing motor mount uses a 19mm drive on a M14x2.0 thread, torqued to 110 ft-lbs at the swing frame.

Fuel — 1986 Case 170b

Fuel fasteners on the 1986 Case 170b. For the frame, plan for a 17mm tool on a M12x1.75 stud; final torque is 85 ft-lbs (fuel tank mount). Injection pump mount tightens to See sequence, takes a 13mm driver, runs on M8x1.25 threads, located at the block. The filter base mount uses a 13mm drive on a M8x1.25 thread, torqued to 22 ft-lbs at the block.

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 1986 Case 170b numbers above.

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