Engine:
Engine overhaul, maintenance, troubleshooting, fuel system, lubrication, cooling system, starting system
Transmission:
Gearbox overhaul, clutch service, PTO operation, differential, final drives
Hydraulics:
Hydraulic system diagnosis, pump service, cylinder repair, control valve operation, hydraulic fluid specifications
Electrical:
Wiring diagrams, lighting system, starting and charging system, instrument panel, accessory circuits
Chassis And Body:
Front axle, steering system, braking system, rear axle, hitch system, operator station, body panels
Maintenance:
Scheduled maintenance charts, lubrication points, filter replacement, fluid level checks
Troubleshooting:
Diagnostic flowcharts for common problems, symptom-based fault finding
Repair:
Step-by-step repair instructions for all major components and systems
Overhaul:
Complete engine, transmission, and hydraulic system overhaul procedures
Depth:
Comprehensive, suitable for professional technicians and experienced DIY mechanics
Engine Type:
David Brown AD Series (likely AD4/55 or similar variant, based on commonality)
Displacement:
Typically around 3.9 liters (236 cubic inches) for this series, but requires manual confirmation.
Cylinders:
4-cylinder, naturally aspirated diesel
Horsepower Rating:
Advertised PTO horsepower typically in the 60-70 HP range (actual specifications depend on specific engine tune and regulations).
Injection System:
Bosch inline injection pump (typical for the era)
Infotainment System:
Basic analog instrumentation (tachometer, engine temperature, oil pressure, fuel gauge). No modern infotainment system.
Driver Assistance Features:
Mechanical power steering (often optional or integrated), differential lock. No electronic driver assistance.
Engine Oil Change:
Typically every 250 hours or annually, but specific interval must be confirmed from manual.
Air Filter Service:
Check at 100 hours, replace as needed or annually. Dry element type.
Engine Oil Type:
API CD or higher, SAE 15W-40 or 10W-30 (cold climates). Capacity approximately 8.2 liters (8.7 US quarts).
Hydraulic Fluid Type:
David Brown HTMA Type C or equivalent (e.g., CAT TO-2 specification, typically an ISO VG 46 hydraulic oil).
Common Wear Points:
Wear in the clutch, PTO clutch pack, hydraulic pump and valve spools, steering box, and front axle kingpins are common on older units.
Engine Idling Problems:
Can be related to fuel filter clogging, injection pump timing, or governor issues.