Target Audience:
Tractor owners, mechanics, and DIY enthusiasts
Value Proposition:
Save significant money on repairs and maintenance
Benefit Vs Dealership:
Empowers users to perform their own repairs, reducing reliance on expensive dealership services
Ease Of Use:
Designed for user-friendliness with clear instructions and visuals
Knowledge Enhancement:
Increases user knowledge and understanding of tractor systems
Workshop Utility:
Printable pages for convenient use in the garage or workshop
Overall Coverage:
Comprehensive repair and service information
Routine Maintenance:
Included
Troubleshooting:
Included
Component Repair:
All major repair jobs covered
Estimated Page Count:
Varies by specific manual edition, but expected to be extensive given the depth implied
Type:
Service Manual / Workshop Manual
Delivery Method:
Instant Download
Accessibility Requirements:
Adobe PDF Reader
Compatibility:
All Versions of Windows & Mac
Engine:
Complete overhaul, diagnostics, timing, fuel system, lubrication, cooling system
Transmission:
Gearbox repair, clutch, PTO operation and maintenance
Hydraulics:
Hydraulic pump, lift cover, external hydraulics, control systems
Electrical System:
Wiring diagrams, starting system, charging system, lighting, instrumentation
Chassis And Steering:
Front axle, steering system, brakes, wheels and tires
Bodywork:
Sheet metal repair, cab removal and installation (if applicable)
Major Repairs:
Engine rebuilds, transmission overhauls, hydraulic system repairs
Routine Maintenance:
Oil changes, filter replacements, greasing points, fluid level checks
Diagnostics:
Troubleshooting guides for common and uncommon problems
Adjustments:
Valve adjustments, brake adjustments, clutch adjustments
Disassembly And Assembly:
Detailed steps for component removal and reinstallation
Depth:
In-depth, professional quality service and repair
Visual Aids:
Includes pictures and diagrams for clarity
Wiring Information:
Detailed wiring diagrams provided
Step By Step Instructions:
Very easy to follow, step-by-step instructions
Engine Manufacturer:
David Brown (likely Perkins-based for this era)
Engine Configuration:
Likely a 4-cylinder or 6-cylinder inline diesel engine
Displacement:
Typical for this model range would be around 3.9L to 4.5L (e.g., 3.9L 4-cylinder or 4.5L 4-cylinder, or potentially a 6-cylinder variant around 6.2L). Exact specification depends on the specific 1594 variant.
Bore X Stroke:
Varies by specific engine variant. For example, a Perkins 4.236 (common in David Brown tractors of this era) has a bore of 3.875 in (98.4 mm) and a stroke of 5.00 in (127 mm).
Horsepower Rating:
Approximately 70-85 PTO HP (subject to specific engine and transmission configuration).
Torque Rating:
Specific torque figures are engine variant dependent, but expected to be in the range of 180-220 lb-ft.
Injection System:
Likely a direct injection system with a mechanical fuel injection pump (e.g., Simms, CAV, or Bosch).
Fuel Filter Part Number Example:
Various common filters used, e.g., for Perkins engines, often CAV or Fram equivalents.
Engine Oil Type:
API CD or CE rated diesel engine oil, viscosity typically SAE 15W-30 or 20W-50 depending on ambient temperature.
Engine Oil Capacity:
Approximately 7.0 - 9.5 liters (7.4 - 10 US quarts), subject to specific engine block and filter.
Coolant Type:
Ethylene glycol based antifreeze with corrosion inhibitors, mixed 50/50 with distilled water.
Transmission Type:
Manual transmission with multiple gear ratios
Gear Selection:
Likely a 8-speed or 12-speed gearbox (e.g., 8 forward + 4 reverse, or 12 forward + 4 reverse with a creeper gear option).
Clutch Type:
Dual-stage dry plate clutch (one for transmission, one for PTO)
Powershift:
While less common for this exact model designation, some later David Brown tractors offered partial powershift options. The 1594 is typically a manual gearbox tractor.
Pto System:
Independent 540/1000 RPM Power Take-Off (PTO), with a dual-stage clutch engagement.
Transmission Oil Type:
API GL-4 or GL-5 rated tractor hydraulic fluid or SAE 80W/90 gear oil for the gearbox. Tractor hydraulic fluid often serves both transmission and hydraulics. (e.g., John Deere J20C, Ford/New Holland M2C 134).
Transmission Oil Capacity:
Approximately 25-30 liters (26-32 US quarts) for the combined transmission and hydraulic system.
Overall Length:
Approx. 3.7 meters (145 inches)
Overall Width:
Approx. 1.8 meters (71 inches) at rear track
Wheelbase:
Approx. 2.3 meters (90 inches)
Operating Weight:
Approx. 2,600 - 3,000 kg (5,730 - 6,615 lbs), depending on configuration and fitted equipment.
Front Axle Weight:
Approx. 1,000 kg (2,205 lbs)
Rear Axle Weight:
Approx. 1,600 - 2,000 kg (3,527 - 4,410 lbs)
Max Gross Weight:
Subject to manufacturer's specification, likely around 5,000 kg (11,023 lbs).
Rollover Protection:
ROPS (Roll-Over Protective Structure) may be an optional or standard fitment depending on the market and production year. The manual would detail installation and maintenance of this.
Braking System:
Hydraulically operated internal expanding shoe brakes on rear wheels. Power-assisted brakes may be available.
Parking Brake:
Independent mechanical parking brake system.
Seatbelts:
If fitted with a cab or ROPS, seatbelts are typically present.
Engine Oil Change:
Typically every 250 hours or annually, whichever comes first.
Air Filter Check:
Check at 50-100 hour intervals, clean or replace as needed.
Fuel Filter Replacement:
Replace every 250-500 hours or annually.
Hydraulic Oil Change:
Typically every 500-1000 hours or every two years.
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid (for hydraulic brake actuation).
Grease Type:
Lithium complex grease (NLGI Grade 2) for lubrication points.
Common Wear Points:
Hydraulic pump wear, PTO clutch wear, common seal leaks (e.g., rear main seal, transmission seals), front axle kingpins and bushings.
Electrical Issues:
Corrosion on electrical connectors, alternator/starter motor issues, wiring harness degradation over time.
Engine Related:
Overheating due to radiator blockage or worn water pump, injector pump issues, blow-by from worn piston rings/liners.
Manufacturer Origin:
David Brown Tractors was a British agricultural machinery manufacturer.
Brand Acquisition:
David Brown was acquired by Tenneco (manufacturer of Case and later Case IH) in 1970.
Series Context:
The 1594 is part of the '94 Series' of tractors, which succeeded the earlier 70 and 90 series. This series represented a significant update in styling and technology.
Production Period:
The 94 Series, including the 1594, was produced from the early 1980s through the mid-1980s.
Manufacturing Location:
Typically manufactured in the UK at the David Brown factory in Meltham, West Yorkshire.
