Part of the New Holland Repair Manuals.
A split tractor on jack stands is no place to work from memory, and the New Holland 1120, 1220 repair manual PDF backs you up with 366 pages of factory procedure for both models, filed under OEM number 42112020. Wiring diagrams trace the starting, charging, and glow plug circuits, while hydraulic schematics map the pump, filter, and remote valve routing through the whole system. Both the 9 X 3 gear transmission and the hydrostatic drive get full overhaul coverage, along with the mid-mount PTO, differential lock, and four wheel drive front axle. Before you condemn a slow starter, mic the commutator against its 1.142 in. (29 mm) minimum and check brush length at 0.354 in. (9 mm). Halfway through a clutch job is a bad time to hunt one clearance. This bookmarked, text-searchable file rides on whatever screen you carry to the tractor, so the number is there while the weather holds.
What's Inside This New Holland 1120, 1220 Repair Manual
| System | Pages | Key Topics |
|---|---|---|
| Production Date Codes and Serial Numbers | 3 | Tractor Identification Plate, Production Identification Number, Production Model Code, Production Unit Date Code, Engine Serial Number |
| Safety Precautions | 4-6 | Personal Considerations, Machine Guards, Lifting Appliances, Compressed Air, Hand Tools, Electricity |
| Service Techniques | 7-8 | Service Safety, Cleaning, Hoses, Tubes, Connectors |
| Engine Systems | 9-66 | Engine and Lubrication System, Cooling Systems, Trouble Shooting, Specifications and Special Tools |
| Fuel System | 67-88 | Injection Pump, Injectors, Trouble Shooting, Specifications and Special Tools |
| Electrical Systems | 89-144 | Wiring, Switches, Glow Plugs and Instrumentation, Battery, Starting Systems, Charging System, Engine Stop Solenoid |
| Clutches | 145-156 | Single Clutch, Servicing Clutch Associated Components |
| Transmission Systems | 157-210 | Standard 9 X 3 Gear Transmission, Hydrostatic Transmission, Hydrostatic Transmission Gearbox, Hydrostatic Transmission Control Linkage |
| Power Take-Off | 211-224 | Standard Power Take-Off, Mid-Mount Power Take-Off |
| Differential, Rear Axle and Brakes | 225-238 | Differential Assembly, Differential Lock, Rear Axle, Final Pinion, Brake Assembly, Parking Brake |
| Hydraulic System | 239-278 | Hydraulic System Circuits, Hydraulic Pump and Filter, Remote Control Valves |
| Steering System | 279-312 | Steering System Models 1120 and 1220, Power Steering System Models 1120 and 1220 |
| Front Axle | 313-334 | Front Axle Two Wheel Drive, Front Axle Four Wheel Drive |
| Wheels and Tires | 335-342 | Tread Setting, Weight Limitations, Lug Bolt Torque, Liquid Ballast, Tire Inflation |
| Separating the Tractor | 343-366 | Front Axle Removal, Engine and Clutch Housing Separation, Clutch Housing and Rear Transmission Separation, Extension Housing Separation, ROPS Removal |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Compressed air pressure | 100 psi (6.9 bar) | p. 4 |
| Fan Diameter | 13.386 in. (360 mm) | p. 63 |
| Armature Shaft Runout (Maximum) | 0.002 in. (0.05 mm) | p. 141 |
| Brush Length (Minimum) | 0.354 in. (9 mm) | p. 141 |
| Theoretical Displacement of the Pump | 1 cu. in./rev. (16.4 cc/rev.) | p. 209 |
| Maximum Working Pressure | 3550 psi (250 kg/cm²) | p. 209 |
| Connector fitting tightening torque | 51 ± 7 lbs. ft. (69 ± 9 Nm) | p. 302 |
| Piston retaining nut tightening torque | 26 lbs. ft. (35 Nm) | p. 304 |
| Steering Gear Shaft Pre-Load | 4.4-9.9 lbs. (2-4.5 Kg) pull | p. 310 |
| Steering Cylinder Piston-to-Tube Clearance | 0.027 in. (0.7 mm) | p. 311 |
| Front Axle Free-Play | 0.12 in. (0.3 mm) | p. 332 |
| Backlash between differential gear and differential pinion | 0.004-0.006 in. (0.1-0.15 mm) | p. 63 |
New Holland 1120, 1220 Common Problems This Manual Covers
New Holland 1220 hydrostatic transmission weak, needs near full throttle to move forward
Check charge pressure first: it must read 69-81 psi (4.3-5.7 kg/cm²), spec on page 209. Low charge pressure points to a plugged HST filter or worn charge pump, so replace the filter, refill, and retest. If the high pressure relief on page 210 opens below 3400-3700 psi, the relief valve or pump is worn.
Manual Section: Transmission Systems p. 209Three-point hitch won't hold, lift arms drop under load with implement attached
Raise an implement, shut off, and watch whether the arms drift; a fast drop points to lift cylinder seals or a leaking check valve. Work through the Hydraulic System section starting on page 239 to pull the lift cylinder and remote valves. Clean valve bores with compressed air held under 100 psi (6.9 bar), then replace the seal kit.
Manual Section: Hydraulic System p. 239Engine dies in the field, then starter won't crank when key is turned
Check battery charge and ground straps first; the 12 volt system uses a 72 ampere-hour battery, spec on page 99. Test the neutral and clutch safety switches for continuity, then bench test the starter. No-load current draw should run about 90 amps, and brushes shorter than 0.354 in. (9 mm) get replaced, specs on page 141.
Manual Section: Electrical Systems p. 141Front wheel shimmy and loose steering on four wheel drive front axle
Jack the front end and rock each wheel; axle free-play beyond .012 in. (0.3 mm), spec on page 332, means worn spindle bushings or bearings. Torque front wheel bolts to 43-54 lbs. ft. (58-73 Nm), page 341, before condemning parts. Follow the Front Axle section starting on page 313 for four wheel drive teardown.
Manual Section: Front Axle p. 332Power steering turns hard both directions, fluid weeps from the steering cylinder gland
Rebuild the cylinder with a seal kit: measure rod-to-gland bushing clearance, 0.0117 in. (0.3 mm) maximum per page 311, and replace the gland if worn past it. Torque the gland head to 94 lbs. ft. (127 Nm) and the piston nut to 27 lbs. ft. (37 Nm), then bleed the system before working the tractor.
Manual Section: Steering System p. 311Frequently Asked Questions
What are the torque specifications for the engine head bolts on a New Holland 1120 tractor?
The head bolt torque specification for the Ford 1120 tractor is 37.9-41.5 lbs. ft. (51.4-56.3 Nm). p. 20
What is the correct valve lash clearance for the 1120 and 1220 engines?
The valve lash clearance for both the 1120 and 1220 engines should be adjusted to 0.008 in. (0.2 mm) when the engine is cold. p. 20
What is the recommended coolant mixture for the tractor engine?
The recommended coolant is a 50/50 mixture of ethylene-glycol anti-freeze and pure water, which provides maximum cooling efficiency and freeze protection down to -33°F. p. 43
What is the specified injection pressure for the injectors on the 1120 and 1220 tractors?
The injectors are set to an opening pressure of 1706 psi (120 kg/cm²). p. 79
What is the correct drive belt deflection for the alternator?
The alternator drive belt deflection should be 7/16 to 9/16 inch (10-15 mm) when 20-25 lbs. (9-11 kg) of force is applied midway between the pulleys. p. 63
Is this New Holland 1120 manual a download or a disc?
A single searchable PDF file of 366 pages, downloadable right after payment. Nothing ships, nothing waits in the mail.
Can I print this New Holland 1120 manual?
Yes, print as many copies as you want, and there are no restrictions. Many mechanics print the section they need and bring it to the shop floor.
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