Part of the New Holland Repair Manuals.
Need the factory teardown for your New Holland TC31DA or TC34DA? This 814-page repair manual (OEM #87531021) covers both models start to finish, from the diesel engine and HST transmission down to the last dash panel bolt. Inside: complete wiring harness diagrams with grounds and fuse locations, hydraulic schematics for the lift cylinder and remote valve circuits, and a full troubleshooting section for the hydrostatic transmission and steering system. You also get every torque spec table for engine, chassis, and metric hardware, plus fluid capacity charts so you're not guessing on a refill. Set hydraulic line pressure to 147 bar (2130 psi) and check that shim thickness holds at 0.2 mm before you button the valve back up. Your multimeter and a prayer aren't a repair strategy. This PDF is bookmarked by section, so pull it up on your tablet in the shop and jump straight to the job.
What's Inside This Repair Manual
| System | Pages | Key Topics |
|---|---|---|
| General Information | 41-68 | Precautionary Statements, Personal Safety, Machine Safety, Information |
| Engine | 69-190 | Specifications, Engine Bolt Torque Specifications, Engine Fuel System Bolt Torque Specifications, Metric Bolt Torque Specifications, Special Tools (Compression Test and Tools) |
| Clutch | 191-212 | Troubleshooting, Specifications, Special Tools, Operation -- Single Clutch (HST Transmission), Adjustments (Free-Play), Overhaul (Single Clutch, Removal, Inspection, Installation) |
| Gear Transmission | 213-260 | Specifications, Special Tools, Operation, Powerflow (Initial Power Flow -- Transmission Input, Initial Power Flow -- PTO Input, FWD Power Flow) |
| FWD Axle | 261-320 | Specifications, Torque Specifications, Front to Rear Axle Ratio, Special Tools, Operation -- SuperSteer |
| Differential, Rear Axle | 321-344 | Specifications, Ring Gear and Pinion Gear Pattern Specification and Adjustment, Bolt Torque Specifications, Special Tools, Introduction, Operation -- Differential Assembly |
| Hydrostatic Transmission | 345-418 | Specifications, Bolt Torques, Minimum Hardware Tightening Torques, Special Tools, Troubleshooting |
| Power Take-Off Systems | 419-436 | Operation -- Live Power Take-Off, Live Power Take-Off, Power Take-Off Drive -- Hydrostatic Transmission, Overhaul -- Power Take-Off, Power Take-Off (Removal) |
| Brakes | 437-448 | Operation, Parking Brake, Overhaul, Specifications |
| Hydraulic System | 449-504 | Specifications, Bolt Torque Specifications, Special Tools |
| Steering Systems | 505-562 | Specifications, Metric Bolt Torque Specifications, Special Tools, Operation -- Power Steering System, Operation -- SuperSteer, Power-Steering Control Motor, Power Steering Pump |
| Wheels and Tires | 563-570 | FWD Tread Setting, Front Wheel Settings, Rear Wheel Settings, Rear Axle Tread Setting, Tractor Weighting, Weighting for Stability, Weighting Limitations |
| Electrical System | 571-788 | Component Location and Function, Wiring Harnesses, Grounds, Battery and Fuses |
| Platform | 789-814 | Hood (Removal, Installation), Rear Hood Panels (Removal, Dash Console (Removal, Seat (Removal, Disassembly, Inspection, Assembly) |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Engine Bolt Torque Specifications | 14 | p. 3 |
| MINIMUM HARDWARE TIGHTENING TORQUES IN NEWTON-METERS (FOOT POUNDS) FOR NORMAL ASSEMBLY APPLICATIONS METRIC NON-FLANGED HARDWARE AND LOCKNUTS CLASS 5.8 UNPLATED M4 | 1.7 (15)* | p. 63 |
| Hydraulic line pressure | 147 ± 5 bar (2130 ± 70 psi) | p. 468 |
| Shim thickness for pressure adjustment | 0.2 mm (0.008") | p. 468 |
| Engine Crankcase Capacity (With Filter) | 4.0 liters/4.2 U.S. qts. | p. 54 |
| Radiator Cap Pressure | 0.9 bar (13 PSI) | p. 81 |
| Clutch Pedal Free-Travel | 19 - 30 mm (3/4 - 1-3/16″) | p. 55 |
| Gear Transmission Gear Backlash | 0.04 - 0.16 mm (0.0016- 0.006″) | p. 215 |
| FWD Axle Drive Pinion Bearing Preload | 10.7 - 13.3 kg (23.6 - 29.4 lbs.) | p. 263 |
| Hydrostatic Transmission High Pressure Relief Valve | 320 (± 3.5) bar (4550 ± 50 psi) | p. 349 |
| PTO Shaft End Play | 0.05 - 0.18 mm (0.002 - 0.007) | p. 435 |
| Hydraulic Pump Capacity | 26.5 L/min (7 gpm) | p. 452 |
