JCB 426, 436, 446 Wheeled Loading Shovel Service Manual (9803/4160-16)

This professional service manual offers in-depth technical information, diagnostics, and repair instructions for JCB 426, 436, and 446 Wheeled Loading Shovels. Ideal for workshop technicians handling advanced repairs and maintenance routines.

Model Covers:

JCB 426 from serial number 531001
JCB 436 from serial number 533001
JCB 446 from serial number 540000 to 540011

File Format: PDF

Size: 86.51 MB

No. of pages: 1238

Language: English

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

📑 Included Sections:

General Information

• Machine model identification and serial number ranges
• Standard torque settings for zinc plated and Dacromet fasteners
• Hydraulic connections including ‘O’ ring face seal and torque stop systems
• Service tooling index with numerical references and diagrams
• Sealing and retaining compounds specifications

Care and Safety

• Comprehensive safety checklists for operators and maintenance personnel
• Identification and explanation of safety labels
• Guidelines for general, operational, and maintenance safety procedures

Routine Maintenance

• Scheduled maintenance intervals and service requirements
• Lubricants, coolant mixtures, anti-corrosion additives, and fluid capacities
• Step-by-step instructions for greasing, battery maintenance, and filter replacement
• Detailed inspection procedures for structural and mechanical components

Body and Framework

• Cab and glazing removal and installation procedures
• Air conditioning system diagnostics and servicing
• Cooling pack cleaning and fan motor replacement
• Chassis, belly plates, and bodywork service instructions

Electrical Systems

• Wiring schematics, fuses, relays, and connector identification
• Battery testing, alternator, and starter motor service procedures
• Electronic Monitoring System (EMS) setup and diagnostics
• Detailed fault-finding techniques and multimeter usage

Hydraulic Systems

• Hydraulic schematics and functional descriptions
• Pump and valve servicing, accumulator maintenance, and flow testing
• Loader lift/crowd ram disassembly and assembly procedures
• Emergency steering hydraulic circuit and troubleshooting

Transmission

• Powershift transmission overhaul and functional testing
• Axle removal, assembly, and crown wheel/pinion adjustment
• Differential servicing including limited-slip units
• Transmission control lever and EMS display diagnostics

Note: For detailed transmission repair procedures, refer to Transmission Manual Publication No. 9806/2150.

Brakes

• Service and park brake system diagnostics and adjustments
• Brake bleeding procedures and accumulator charging
• Foot brake valve and park brake calliper servicing

Steering

• Hydraulic steering system schematics and fault-finding routines
• Steering column, valve, and ram removal and installation procedures

Engine

• Engine identification and specifications for Perkins and Cummins models
• Cooling, fuel, and lubrication system service instructions
• Guidelines for engine removal and installation procedures
• Detailed servicing procedures for Tier 2 and Tier 3 engines

Note:

• 426, 436 (Perkins 1006-6T7 / 1006-6T4): Engine Service Manual Publication No. 9806/0100.
• 446 (Cummins C Series 6CT 8.3 - 170): Engine Service Manual Publication No. 9806/2130.
• 426B, 436B (New 1000 Series - 1006-6T / 1006-TW): Engine Service Manual Publication No. 9806/2140.
• 426 from Serial No. 532500 & 436 from Serial No. 534200 (BTAA 5.9 - C Tier 2): Engine Service Manual Publication No. 9806/3020.
• 426e from Serial No. 1295000 & 436e from Serial No. 1410000 (QSB6.7 Tier 3): Engine Service Manual Publication No. 9806/3020.

This JCB Service Manual is an indispensable resource for technicians working on complex repairs, diagnostics, and preventive maintenance for JCB 426, 436, and 446 Wheeled Loading Shovels.