Part of the New Holland Repair Manuals.
This is the factory service manual for the New Holland 7630 and 8030 tractors, document 73403953, covering machines from serial number Z7CA27168. It works through the tractor system by system: engine, clutch, transmission, front and rear axles, PTO, brakes, hydraulics, hitches, steering and electrical. The engine section gives the specifications and clearances for both the four-cylinder and the six-cylinder turbocharged intercooled engines, and the hydraulic and steering sections give the pump flows and the exact safety valve adjustment pressures, which differ depending on whether the tractor has auxiliary front drive.
What's Inside This New Holland 7630, 8030 Manual
| System | Pages | Key Topics |
|---|---|---|
| Engine | 17-220 | 4-Cylinder 4485 Cm3 and 6-Cylinder 6728 Cm3 Turbocharged Intercooled Diesels, Bosch Common Rail Injection, Cylinder Heads and Valve Drive, Connecting Rods and Pistons, Crankshaft and Flywheel, Balancer and Damper, Turbocharger, Cooling and Lubrication, Engine Overhaul |
| Clutch | 221-252 | Clutch and Components, Hydraulic Release Control, Pedal Free Play, Clutch Removal and Refitting |
| Transmission | 253-428 | Mechanical Transmission External and Internal Components, Shift Controls, Synchronisers and Shafts, Transmission Diagnostics and Overhaul |
| Front Axle System | 429-545 | Powered Front Axle, Front Bevel Gear Set and Differential, Final Drive Hub and Steering Knuckle, Axle Rebuild |
| Rear Axle System | 546-622 | Powered Rear Axle, Rear Bevel Gear Set and Differential, Planetary and Final Drives, Final Drive Hub and Steering, Backlash and Preload |
| Power Take-Off (PTO) | 623-681 | Rear Mechanical PTO Clutch, Rear Electro-Hydraulic PTO, Two-Speed Rear PTO, PTO Gearbox and Overhaul |
| Brakes and Controls | 682-713 | Mechanical Service Brakes, Hydraulic Service Brakes, Parking Brake, Pedal Adjustment and Bleeding |
| Hydraulic Systems | 714-898 | High-Flow and Low-Flow Gear Pumps with Their Rated Flows, Pump Control Valves, Combination Pump Units, Safety Valve Adjustment Pressures, Remote Control Valves, Lift Circuit, Pressure Testing |
| Hitches, Drawbars and Implement Couplings | 899-950 | Rear Three-Point Hitch and Lift Links, Drawbars and Towing Attachments, Implement Coupling and Setting |
| Steering | 951-1012 | Gear-Type Steering Pump, Orbitrol Steering Unit and Its Safety Valve Settings, Steering Cylinders, Steering Column, Circuit Fault Finding |
| Electrical Systems | 1013-1144 | Engine Starting System, Charging Circuit, Wiring Schematics and Connector Views, Instruments and Lighting, Fuses and Relays, Circuit Test Procedures |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| 4-cylinder engine | ||
| Total displacement, 4-cylinder engine | 4485 cm3, turbocharged with intercooler | |
| 6-cylinder engine | ||
| Total displacement, 6-cylinder engine | 6728 cm3, turbocharged with intercooler | |
| Both engines | ||
| Bore and stroke | 104 mm (4 in) x 132 mm (5 in) | |
| Injection type | Bosch high pressure common rail, direct injection | |
| Valve clearance | Intake 0.20 to 0.30 mm, exhaust 0.45 to 0.55 mm | |
| High flow hydraulic pump | ||
| Flow, High flow hydraulic pump | 56 l/min at 2374 engine rpm | |
| Low flow hydraulic pump | ||
| Flow, Low flow hydraulic pump | 35.2 l/min at 2374 engine rpm | |
| Hydraulic system | ||
| Safety valve adjustment pressure | 176 to 183 bar | |
| Steering pump | ||
| Type and flow | Gear pump, 35 l/min | |
| Tractors without auxiliary front drive | ||
| Orbitrol steering safety valve, Tractors without auxiliary front drive | 145 to 183 bar | |
| Tractors with auxiliary front drive | ||
| Orbitrol steering safety valve, Tractors with auxiliary front drive | 166 to 172 bar | |
| Hydraulic pump | ||
| Maximum capacity (includes filter) | 66 l/min (17.4 US gpm) | |
