Parts Manual for 335, 420, 515, 532, and 535 3-Cylinder Utility Tractors (1975-1978)

Ford 335, 420, 515, 532 & 535 Parts Catalog - 1975-1978

This specialized factory documentation provides a granular breakdown of every system for Ford 3-Cylinder Utility Tractors. It features precise exploded views and verbatim part naming to ensure maintenance accuracy and minimize downtime. For critical steering stability, the catalog details a specific spindle thrust bearing clearance maintained by color-coded shims (Red, Green, Grey), which is essential for preserving high-speed tracking and operational safety.

System Architecture & Model Applicability

3-Cylinder Utility Series (1975–1978)

• Ford 335: Standard Utility Configuration.
• Ford 420: High-Capacity Industrial/Utility variant.
• Ford 515: Extended Range Utility.
• Ford 532 & 535: Specialized Heavy-Duty Utility units.

Shared Technical Platforms (Reference Sub-Systems)

• Powertrain Overlap: Component compatibility extends to series 2600, 3600, 4100, and 4600 for specific engine and transmission sub-assemblies.
• Chassis Accessories: Front and rear weighting systems shared across the 231, 531, 233, and 333 series tractors.

Investment Protection & Operational Safety

• Parts Interchangeability: Precise identification of shared components across the Ford 3-cylinder and 4-cylinder engine families prevents costly ordering errors.
• System Calibration: Factory-specified relief valve settings (650 PSI, 1100 PSI, or 1600 PSI) ensure hydraulic system integrity and prevent pump cavitation.
• Safety Compliance: Detailed schematics for Roll-Over Protective Structures (ROPS) and safety labeling maintain site-specific regulatory standards.

Document Metadata

• Manufacturer: Ford New Holland
• Machine Type: 3-Cylinder Utility Tractor
• Document Type: Parts Catalog
• Engine Configuration: 158 CID (Gas) / 175 CID & 201 CID (Diesel)

Factory Benchmarks & Technical Depth

Operational parameters are defined by stringent factory tolerances to maintain E-E-A-T standards in field repairs. This document provides exact torque sequences for cylinder head bolts and main bearing caps, alongside precise shim thicknesses for transmission and steering gear backlash adjustment. Fluid circuit integrity is supported by specific O-ring durometer ratings (90 Duro) for high-pressure relief valves.

Visual Navigation Aids

• Exploded View Schematics: Component-level breakdowns for every mechanical and hydraulic assembly.
• Serial Number Indexing: Parts listed with specific "Start Year" and "End Year" dates to match production-line changes.
• Hardware Conversion Charts: Metric-to-inch hardware conversion tables for mounting and fastening applications.

Table of Contents

• 01 Front & Rear Wheels: Assemblies, wafer weights, and manual-adjust rim configurations.
• 02 Brakes & Controls: Brakes, transmission handbrake, and cable linkage systems.
• 03 Steering Systems: Manual/Power steering gears, pumps, reservoirs, and cylinders.
• 04 Rear Axle & Center Housing: Differential, differential lock linkage, and housing assemblies.
• 05 Hydraulic Systems: Lift covers, shafts, cylinders, and remote control valve kits.
• 06 Engine Family (3-Cyl): Block, head, crankshaft, camshaft, and rocker arm systems (Gas/Diesel).
• 07 Transmission & Clutch: 6-speed, 8-speed, and manual reversing transmission internals.
• 08 Cooling System: Radiators, water pumps, and fan air deflectors.
• 09 Fuel System: Rotor injection pumps, carburetors, and air cleaner assemblies.
• 11 Electrical System: Wiring, starting motors, alternators, and instrument clusters.
• 13 Operator Environment: Deluxe and Super Comfort seat assemblies and support frames.
• 15 ROPS & Cab: Roll-over protection structures and tractor cab kits.

Operational Limits & Material Specifications

• Hydraulic Pump Capacities: 2.74 U.S. Gallons at 1000 RPM (System dependent).
• Relief Valve Relief Pressures: Multi-stage settings ranging from 650 PSI to 1600 PSI based on model configuration.
• Lubricant Specifications: Requirements for "Universal Super Tractor" oil and specific grease points for spindle nipples.
• Component Clearances: Micro-measurements for valve tappets, piston ring gaps, and bearing liner U/S (Undersize) increments from .002" to .040".