Part of the New Holland Repair Manuals.
Spray season does not wait on a harness fault, and when boom section control drops out mid pass, the 931 page New Holland SP2500 Defensor service manual PDF (OEM ID 51564864) is where your diagnosis starts. Wiring diagrams carry the heaviest load here, tracing circuits from battery distribution through boom controls, auto leveling, direct injection, and the AG CAN bus out to the nav controller. Hydraulic schematics map the reservoir, both pumps, and the sprayer circuit, while teardown procedures run from the engine through the hydrostatic drive to the chemical spraying system. Setting a powered front axle? Torque the hardware to 298 to 326 N·m (220 to 240 lb ft) and verify parking brake release at 1630.0 kPa (236.4 psi). Guess at a harness pin instead and you buy a controller the sprayer never needed. Bookmarked and text searchable, this PDF puts the machine back in the field before the spray window closes.
What's Inside This New Holland SP2500 Defensor Manual
| System | Pages | Key Topics |
|---|---|---|
| Engine | 6-71 | Engine and Crankcase, Fuel Tanks, Fuel Filters, Intake and Exhaust Manifolds and Muffler, Engine Cooling System, Aftercooler, Engine Lubrication System |
| Power Coupling | 72-79 | Pump-Drive Assembly |
| Front Axle System | 80-133 | Powered Front Axle, Final Drives |
| Rear Axle System | 134-183 | Powered Rear Axle, Planetary and Final Drives |
| Hydrostatic Drive | 184-255 | Transmission and Steering Hydrostatic Control, Pump and Motor Components |
| Brakes and Controls | 256-269 | Hydraulic Service Brakes |
| Hydraulic Systems | 270-335 | Reservoir, Cooler, And Filters, Fixed Displacement Pump, Variable Displacement Pump, Sprayer Hydraulic System |
| Frames and Ballasting | 336-355 | Sprayer Boom |
| Steering | 356-379 | Steering Control, Hydraulic Control Components, Cylinders |
| Wheels | 380-397 | Front Wheels, Rear Wheels |
| Cab Climate Control | 398-449 | Heating, Air Conditioning |
| Electrical Components - Description and Identification | 450-468 | ECU Description, Sensor Description, Battery Description, Diode Description, Fuse Description, Voltage Source Description |
| Electrical Components - Ground, Speaker, Relay, Load, Lamp, Motor, Resistor, Switch, Solenoid | 469-506 | Ground Description, Speaker Description, Relay Description, Load Description, Lamp Description, Motor Description |
| Wiring Harnesses - General Information and Power Distribution | 507-525 | General Information, Batteries, Distribution, Start, Ignition Switch, Fuses |
| Wiring Harnesses - Lighting and Cab Systems | 526-567 | Work Lights, Head Lights, Cab Lights, Wiper, Seat, HVAC, Radio |
| Wiring Harnesses - Boom Controls and Leveling | 568-624 | Boom Controls, Center Section, Tip Fold, Product Pump, Auto Leveling |
| Wiring Harnesses - Direct Injection and Navigation | 625-843 | Direct Injection, GPS Receiver, AG CAN Bus, Nav Controller, Steering Command |
| Spraying | 844-899 | Chemical Spraying, Spraying Pump |
| Platform, Cab, Bodywork, and Decals | 900-931 | Cab, Cab Interior, Machine Shields and Guards |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Powered front axle torque, callouts (1) and (2) | 298 – 326 N·m (220 – 240 lb ft) | p. 84 |
| Fuel filter tightening | 1/4 a 1/2 turn | p. 36 |
| Initial pressure for release of the parking brake | 1170.0 kPa (169.7 psi) | p. 116 |
| Total pressure for release of the parking brake | 1630.0 kPa (236.4 psi) | p. 116 |
| Volumetric displacement adjustment per complete turn of pin (4) | 4.1 cm³ (0.3 in³) | p. 207 |
| Volumetric displacement adjustment range | 14.45 – 46.0 cm³ (0.88 – 2.8 in³) | p. 207 |
| Multi-function valve torque | 89 N·m (66 lb ft) | p. 244 |
| Bypass actuator torque | 40 N·m (30 lb ft) | p. 244 |
| Retaining plate bolts torque | 16 N·m (12 lb ft) | p. 242 |
| Controller assembly bolts torque | 16 N·m (12 lb ft) | p. 243 |
| Engine mounting pad bolts torque | 234 – 260 N·m (173 – 192 lb ft) | p. 10 |
New Holland SP2500 Defensor Common Problems This Manual Covers
New Holland SP2500 drive wheel spins intermittently, machine loses traction climbing out of wet spots
Check the wheel speed sensor and its connector at the right front wheel framing first; sensor identification begins on page 450. If wiring checks good, service the hydraulic drive motor, and torque the motor mounting bolts to 118 to 132 N·m (87 to 97 lb ft) per page 205.
Manual Section: Hydrostatic Drive - Hydraulic Motor Service p. 205Hydraulic pressure drops after warm up, boom lift and steering respond slowly
Test system pressure before condemning the pump; a worn relief valve bleeds pressure the same way. Warm the oil at 1500 RPM for 20 minutes per page 282, then inspect the multi-function valves on the hydrostatic pump. Replace worn valves and torque them to 89 N·m (66 lb ft) per page 244.
Manual Section: Hydrostatic Drive p. 244Hydraulic oil runs hot and foams in the reservoir, drive response turns jerky
Drain the reservoir and replace both hydraulic filters; reservoir and filter procedures are in the Hydraulic Systems section starting on page 270. After refilling, run the engine at 1500 RPM for 20 minutes to warm the oil, then run the machine under normal load for at least 1 hour to complete the oil filtering, per page 282.
Manual Section: Hydraulic Systems - Reservoir and Filter Service p. 270Engine starves for fuel under load, stumbles and dies at full spray rate
Replace the fuel pre-filter and main filter before chasing injection trouble; dirty farm-stored fuel is the usual culprit. Drain the tank sediment, install new filters, and tighten each filter 1/4 to 1/2 turn after the gasket contacts, per page 36.
Manual Section: Fuel System - Drain and Replace p. 36Steering wanders on the road and front wheels shimmy at transport speed
Inspect the steering cylinder ball joints and pivot pins for play; procedures are in the Steering section starting on page 356. Replace worn joints, then torque the steering cylinder mounting hardware to 291.0 to 305.0 N·m (214.6 to 225.0 lb ft) as specified on page 376. Recheck toe before road travel.
Manual Section: Steering p. 376Frequently Asked Questions
What is the torque for the engine radiator fan bolts on the New Holland SP2500 Defensor?
The radiator fan fastening bolts must be tightened to a torque of 52 – 61 N·m (38 – 45 lb ft). p. 20
What is the torque for the front and rear engine mounting pad bolts on the New Holland SP2500 Defensor?
The bolts for the front and rear engine mounting pads must be torqued to 234 – 260 N·m (173 – 192 lb ft). p. 19
How do I bleed the hydraulic system on the New Holland SP2500 Defensor?
To bleed the hydraulic system, replace the hydraulic tank return filter, connect the diesel engine and run at 1500 RPM in neutral for at least 20 minutes to heat and filter the oil, then operate under moderate load for at least 60 minutes. p. 206
What is the A/C compressor clutch air gap on the New Holland SP2500 Defensor?
The air gap between the clutch plate and the pulley must be between 0.400 – 0.790 mm (0.016 – 0.031 in). p. 440
What is the torque for the final drive retaining bolts on the New Holland SP2500 Defensor?
The 12 final drive retaining bolts must be tightened in a criss-crossed pattern to a torque of 271 N·m (200 lb ft). p. 129
What do I get after purchasing this New Holland SP2500 manual?
Straight to your device: 931 pages of searchable Service Manual, downloadable the moment payment goes through.
Can I print a copy of this New Holland SP2500 Service Manual for the shop?
You can. The PDF is unlocked and carries no copy protection, so print the sections you want and keep the file as your backup.
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