CASE IH Farmall 20B, Farmall 25B Compact Tractor Service Manual

CASE IH Farmall 20B, Farmall 25B Compact Tractor Service Manual. 

This technical service manual provides comprehensive repair, diagnostic, and system-specific procedures for the CASE IH Farmall 20B and 25B compact tractors. The manual includes detailed instructions for maintenance, troubleshooting, and repairs across all critical systems: engine, transmission, hydraulic, steering, and electrical, ensuring professional-grade service for these compact tractor models.

Model Covers:

FARMALL 20B
FARMALL 25B

File Format: PDF

Size: 84.00 MB

No. of pages: 758

Language: English

Publication: 47576301 1st Edition, English, July 2013

Delivery Method: Instant Download – Access your file immediately after purchase.

📑 Included Sections:

Engine

• Engine diagnostics, including crankcase inspection, lubrication system servicing, and cooling system maintenance.
• Step-by-step procedures for disassembling, inspecting, and assembling engine components, including pistons, cylinder heads, and crankshaft.
• Advanced troubleshooting for the fuel system, air intake, exhaust systems, fuel injection timing, and cooling system performance.
• Alignment and mounting specifications for engine components to minimize vibration and ensure optimal operation.

Front Axle System

• Repair and diagnostics for powered front axle systems, including drive shafts and bevel gear set assembly.
• Inspection and reassembly of front axle differential and bevel gear sets with proper torque and gear mesh adjustments.
• Service procedures for final drive hubs, steering knuckles, and shafts, including lubrication maintenance and wear checks.

Rear Axle System

• Complete diagnostics and repair procedures for the rear axle system, including bevel gear set disassembly, inspection, and reassembly.
• Maintenance of final drive hubs, steering knuckles, and shaft assemblies, with specifications for proper bearing torque and alignment.

Hydrostatic Drive

• Complete service and diagnostics for hydrostatic transmission systems, including pump and motor components.
• Calibrating and troubleshooting the hydrostatic transmission for proper fluid flow, pressure, and motor performance.
• Instructions for reservoir maintenance, cooler servicing, and hose management for the hydrostatic control system.

Power Take-Off (PTO)

• Repair procedures for the rear PTO system, including mechanical and electro-hydraulic control systems, and troubleshooting issues under load.
• Disassembly and reassembly of PTO components, including shaft systems, clutches, and speed control mechanisms (one-speed or multi-speed options).

Brakes and Controls

• Brake system diagnostics, including parking brake adjustment, mechanical service brake servicing, and hydraulic brake system maintenance for optimal performance.
• Comprehensive service instructions for hydraulic parking lock, trailer brake systems (both hydraulic and pneumatic), and front axle brake systems.

Hydraulic Systems

• Full diagnostics and servicing procedures for hydraulic systems, including primary and auxiliary circuits and hydraulic pressure testing to identify system failures.
• Maintenance of the fixed displacement pump, including adjustments for system pressure and flow optimization.
• Service procedures for remote control valves, hitch controls, and hydraulic cylinder performance, ensuring smooth operation of attachments.
• Detailed maintenance procedures for hydraulic reservoirs, coolers, and filters, focusing on contamination control and system purging techniques.

Hitches, Drawbars, and Implement Couplings

• Step-by-step servicing of the rear three-point hitch system, including correct attachment to implements and diagnostic checks for lifting capacity and wear.
• Instructions for servicing the drawbars, towing systems, and implement couplings, including proper torque settings and safety checks.

Steering

• Complete procedures for diagnosing and servicing the hydraulic steering control system, including tie rods, steering cylinders, and pumps.
• Adjusting and calibrating the steering system for optimal responsiveness and performance under varying load conditions.

Wheels

• Maintenance and servicing instructions for front and rear wheels, including tire pressure adjustments, wheel balancing, and alignment checks.
• Repair and service procedures for wheel bearings, axles, and suspension components to prevent wear and ensure proper wheel rotation.

Electrical Systems

• Comprehensive diagnostics and repair procedures for the electrical system, including fuel injection system, battery charging, and fuel tank sensors.
• Servicing electrical connectors, wiring harnesses, and system ground checks to maintain optimal performance.
• Detailed procedures for diagnosing and repairing external lighting systems, warning indicators, alarms, and instrument clusters.
• Maintenance instructions for battery systems, cold start aids, and the engine starting system to ensure proper operation during startup.

Platform, Cab, Bodywork, and Decals

• Servicing instructions for the operator seat, including mechanical adjustment mechanisms and safety features to ensure comfort and safety during operation.
• Replacement and repair procedures for body panels, the cab structure, windshield, and safety guards, with structural integrity checks to prevent damage.
• Step-by-step instructions for applying and maintaining safety decals, ensuring compliance with regulatory standards and improving operator safety.

This CASE IH Farmall 20B, Farmall 25B Compact Tractor Service Manual is designed for professional service technicians performing diagnostics, repair, and maintenance tasks on the compact tractor configurations.