Ford 231, 335, 420, 515, 531, 532 & 535 Industrial Tractor Operator's Manual
This operator's manual is the factory operation and maintenance reference for the Ford 231, 335, 420, 515, 531, 532, and 535 Industrial Model Tractors, running roughly 80 pages of controls, operating techniques, lubrication and maintenance, and general specifications. It's the book that came with the machine: break-in and starting procedures, the lubrication and maintenance chart, fuels and lubricants guidance, and the pre-delivery and 50-hour service checklists. Where the models differ, the manual presents the specific information for each. Originally published by Ford and delivered here as an instant PDF download you can read on any device or print for the cab.
Models covered: Ford 231 · 335 · 420 · 515 · 531 · 532 · 535 (Industrial Model Tractors) — differences called out per model where they exist.
About the Ford Industrial Series
These are Ford's Industrial Model Tractors, offered in both gasoline and diesel form — the manual documents a gasoline engine choke control and a diesel engine stop control side by side, so the same book serves either fuel type. Transmission options run the range: a 6×2 manual (6 forward, 2 reverse), a 6×4 manual (6 forward, 4 reverse), an 8×2 manual, and a 4-speed 4×4 power reversing transmission fitted to the Ford 420 and 535. Those power-reversing tractors also carry a transmission oil temperature warning light and a foot throttle, the latter optional on the 231, 335, 515, 531, and 532.
The lineup is built around practical industrial work — differential lock for traction in wet or loose soil, live, transmission, and independent P.T.O. arrangements, a hydraulic lift system, and ROPS with seat belt on tractors so equipped. Machines of this vintage remain in service on properties, yards, and small operations, and having the factory operating and maintenance procedures on hand is what keeps them running correctly and safely.
What This Manual Covers
- Safety precautions: Operating, driving, and P.T.O. safety guidelines, including ROPS and seat belt use, drawbar pulling practice, and stationary P.T.O. work.
- Controls and instruments: Seat, light, and engine controls; brake controls; manual shift and power reversing transmission and P.T.O. controls; and hydraulic lift system controls — including the Proof-Meter, warning lights, throttles, and fuel shut-off valve.
- Operation: Break-in procedures, starting and stopping the engine, operating the manual shift and power reversing transmissions and P.T.O., towing the tractor, the differential lock, and the hydraulic lift system.
- Hitch, drawbar, and weighting: Lift linkage and drawbar setup, wheel tread settings, and tractor weighting — including recommended liquid weight fill figures.
- Lubrication and maintenance: Lubrication and maintenance chart, fuels and lubricants, fuel and lubricant service procedures, general maintenance, tractor storage, and accessories — covering items like the hydraulic system oil filter, power steering reservoir, and engine speed adjustment.
- Specifications: General specifications for the covered models.
- Pre-delivery and 50-hour service: The pre-delivery service checklist and the factory-recommended 50-hour service records, in owner and dealer copies.
Why This Manual Matters
- One book, seven models. Coverage spans the Ford 231, 335, 420, 515, 531, 532, and 535 in a single reference, with model-specific notes where the machines differ — handy if your yard runs more than one.
- Gasoline and diesel, multiple transmissions. Both fuel systems are documented, along with the 6×2, 6×4, 8×2 manual and 4×4 power reversing transmissions, so you can match procedures to your exact configuration.
- The maintenance schedule spelled out. The lubrication and maintenance chart, fuels and lubricants guidance, and service intervals keyed to the Proof-Meter let you service on time instead of guessing.
- Correct operation from the start. Break-in, starting, hydraulic lift, differential lock, and P.T.O. procedures are the details that protect the machine and the operator.
- Factory literature, back in reach. Original operator's manuals for these industrial Fords are increasingly hard to find — this searchable, restored PDF puts it back in your hands.
Manual Code: SE 3503 127540