Bobcat 425, 428 Compact Excavator Service Manual (6904866EN 2009)

Bobcat 425, 428 Compact Excavator Service Manual 6904866EN (9-09)

This comprehensive service manual delivers detailed repair instructions, maintenance routines, and troubleshooting guidance for Bobcat 425 and 428 Compact Excavators. Ideal for field service technicians and workshop professionals, it includes extensive diagrams and procedural steps for all key systems.

Model Covers:

Bobcat 425 Compact Excavator
Bobcat 428 Compact Excavator

File Format: PDF

Size: 18.30 MB

No. of pages: 691

Language: English

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

📑 Table of Contents Overview:

Maintenance & Safety Operations

• Service charts, air cleaner, fuel, oil & coolant system procedures
• Transporting, lifting, cab/windows, TOPS, alternator belt and emergency exit features
• Storage preparation, spark arrestor service, and pivot pin maintenance

Hydraulic System Repair & Testing

• Hydraulic schematics and system troubleshooting by circuit type
• Complete procedures for servicing boom, arm, clamp, blade, bucket and swing cylinders
• Valve and pump service, control lever diagnostics, travel motor and accumulator support

Undercarriage & Track Components

• Rollers, idlers, sprockets, tensioning adjustments and track installations
• Rubber and steel track support, spring assembly and bushing replacement
• Blade and swing circle gear servicing with expanded shaft details

Cab, Upperstructure & Controls

• Canopy, cab, doors, glass, seat mount, joystick consoles and control pedals
• Blade control assembly, swing lock, counterweights, tank, horn, and covers
• Bucket, clamp, and X-Change™ components removal and installation

Electrical & Diagnostic Features

• Electrical schematics, fuse/relay maps, harness connectors, troubleshooting
• Battery, starter, alternator output testing, magnetic lockout sensors
• Diagnostic service codes and light system repairs

Engine Overhaul & Fuel System

• Valve adjustments, compression, fuel injector nozzle testing, timing and shutdown solenoid
• Cylinder head, crankshaft, camshaft, pistons, lubrication and cooling systems
• Thermostat, oil pressure testing, radiator, and rear plate service

Heater System

• Heater coil, blower fan, valve diagnostics and component replacement
• Airflow troubleshooting and electrical heater control testing
• Filter servicing and system layout descriptions

Specifications & Tools

• Excavator specs for 425/428 models, torque charts, hydraulic fluid data
• O-ring/fitting charts, conversion tables, and service manual revision notes

This expertly compiled Bobcat 425, 428 Compact Excavator Service Manual is your essential workshop companion for in-depth machine service and reliable maintenance results.

Note: For updated machines starting from serial numbers AACJ11001, A9K311001 (425), and A9K411001 (428), refer to the revised and expanded edition – [Bobcat 425/428 Service Manual 02-16 (6986952enUS)] – featuring enhanced hydraulic schematics, revised coil spring assemblies, and added support for the Hydraulic X-Change valve and service-specific tooling.