McCormick Farmall Cub
1960 McCormick Farmall Cub row-crop/utility tractor (Serial 221399 J, Rockford clutch suffix)
Quick-Glance Shop Specs
Full Matrix ↓The Cub uses a thermosiphon cooling system—there is NO water pump or thermostat. Never overfill the radiator past the baffle plate, and ensure cooling fins and passages are entirely free of lime and debris, or it will overheat rapidly under load.
OEM Preventative Maintenance Schedule
Factory operator manual checkpoints for McCormick Farmall Cub
Daily / Every 10 Hours
- Check engine crankcase oil level on dipstick
- Inspect oil bath air cleaner cup and refill with clean engine oil if sediment reaches 1/4 inch
- Check coolant level in top tank above core tubes
- Inspect fuel sediment bowl for water and dirt accumulation
Every 50 Hours
- Grease front steering spindles, tie rod ends, and front axle pivot pin
- Lubricate clutch release bearing / throwout grease fitting (do not over-grease)
- Check transmission and final drive gear lubricant levels
- Clean radiator cooling fins of dust, chaff, and dirt
Every 120 Hours
- Drain engine crankcase and replace engine oil
- Replace cartridge engine oil filter and clean housing canister
- Service and flush oil bath air cleaner assembly
- Inspect fan belt tension and adjust generator belt deflection to 1/2 inch
Every 250 Hours
- Remove and clean spark plugs, check electrode gap (0.023 - 0.027 in)
- Inspect distributor/magneto breaker points (0.020 in gap) and clean internal rotor
- Lubricate distributor cam wick and generator bearing wells
- Inspect Touch-Control hydraulic fluid level (IH Hy-Tran) with arms retracted
Every 500 Hours / Seasonally
- Drain and refill transmission and differential case with SAE 90 EP / 80W-90
- Drain and refill both left and right final drive drop housings
- Flush cooling system and refill with clean water/anti-freeze mixture
- Clean fuel tank sediment bowl screen and flush carburetor inlet strainer
Complete Fluid Capacities, Fastener Torques & Clearances
All reservoir capacities, drain/lug/blade/mount bolt torques, valve lash, pressures, and electrical specs — tap any value to copy.
Compile and save the full OEM Workshop Service Manual table (coolant, axles/trans, lug & blade torques, drain plugs, valve lash, pressures) for this exact sub-model.
Routine Service & Filtration Ledger
Engine-first & decal OEM numbers paired with verified cross-references — tap any code to copy
Full-flow internal canister element that filters crankcase engine oil.
18mm commercial spark plug providing combustion ignition.
Breaker point contact set for IH battery ignition distributor or magneto.
Seals glass fuel sediment bowl and filters debris exiting fuel tank.
Hydraulics, Brakes, Bearings, Drive & Chassis Components
Category-matched heavy wear & chassis replacement parts across OEM and wholesale counters
Friction disc transmitting engine power to transmission input shaft.
Graphite thrust ring disengaging the clutch assembly when pedal is pressed.
Drives the cooling fan and generator off the front crankshaft pulley.
Prevents gear lube from leaking out of the drop axle housing into the brake drums and wheels.
OEM Exploded Assembly Diagrams
Direct lookup portals for belt routing, linkages, hardware callouts, and serial-break assemblies
Common Issues (3)
McCormick Farmall Cub: Engine runs rough, backfires, or dies under load
Root Cause: Clogged main jet in IH 3/4-inch updraft carburetor or sediment bowl mesh plugged
Shop Check: Remove the hex brass main jet plug on the carburetor side bowl and clear the tiny orifice using a soft copper wire and spray cleaner; flush fuel strainer.
McCormick Farmall Cub: Clutch squeals when depressed, fails to fully disengage, or chatters
Root Cause: Dry or worn graphite throwout bearing or misadjusted clutch pressure plate fingers
Shop Check: Lube the graphite throwout bearing collar grease zerk with IH high-temp grease and adjust clutch release lever clearance through the inspection handhole.
McCormick Farmall Cub: Oil leaking onto right rear wheel rim and tire
Root Cause: Failed axle seal in final drive drop housing or overfilled drop case oil
Shop Check: Jack rear axle, remove rear wheel and final drive pan, replace the outer axle oil seal (OEM 350841R91), and refill oil strictly to check-plug level.
Step-by-Step Repair, Winterizing & Startup Guides
Tap a seasonal storage/prep checklist, select a failure mode, or type any repair job below.
Shared Mechanic Tips for McCormick Farmall Cub
Wrenching shortcuts, hidden grease fittings, left-hand threads, and fitment notes from other techs.
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