New Holland TC23DA, TC26DA Tractor Service Manual
717 pages · Publication 87367140
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What's inside
From the manual's own table of contents: 129 sections, 657 entries. See sample pages (PDF, 640 KB)
SECTION 00 - GENERAL INFORMATION
SECTION 10 - ENGINE
SECTION 18 - SINGLE CLUTCH
SECTION 21 - TRANSMISSION
SECTION 25 - FWD FRONT AXLE
SECTION 27 - DIFFERENTIAL, REAR AXLE
SECTION 29 - HYDROSTATIC TRANSMISSION
SECTION 31 - POWER TAKE-OFF (PTO)
SECTION 33 - BRAKES
SECTION 35 - HYDRAULIC SYSTEM
SECTION 41 - STEERING
SECTION 44 - WHEELS AND TIRES
SECTION 55 - ELECTRICAL SYSTEM
SECTION 90 - PLATFORM
Introduction
Precautionary Statements
Safety
The Tractor
Servicing the Tractor
Operating the Tractor
Driving the Tractor
Operating the PTO
Diesel Fuel
Safety Frame (ROPS)
Show all 129 sections
Safety Decals
Instruction Decals
Product Identification Plate
Universal Symbols
Specifications -- TC23DA, TC26DA
General Dimensions -- TC23DA, TC26DA
Minimum Hardware Tightening Torques
Lubricants
Adjustments
10 000 Specifications12 topics
- Cylinder Head
- Cylinder Block
- Piston
- Piston Ring
- Connecting Rod
- Crankshaft
- Camshaft
- Valves
- Push Rods
- Rocker Arms
- Lubrication System
- Cooling System
Torque Specifications
Metric Bolt Torque Specifications
Special Tools
Description and Operation -- General Information3 topics
- Identification Chart
- Cylinder Head and Valve Train Components
- Cylinder Block Assembly
Troubleshooting
Overhaul -- Engine25 topics
- Engine Preparation
- Disassembly
- Fuel Injector and Glow Plug
- Removal
- Oil Pressure Switch
- Temperature Sending Switch and Alternator
- Removal
- Fan, Water Pump, and External Oil Tube
- Valve Cover
- Rocker Shaft and Push Rod
- Removal
- Valve Tappet
- Fuel Shut-off Solenoid
- Removal
- Engine Timing Gear Cover
- Timing Gears and Camshaft
- Removal
- Oil Sump
- Oil Suction Pipe and Strainer
- Removal
- Connecting Rods, Bearing and Pistons
- Flywheel
- Removal
- Backplate and Oil Seal
- Crankshaft and Main Bearing
18 110 Cylinder Head10 topics
- Disassembly
- Inspection
- Valve Seats
- Inspection
- Valve Guides
- Inspection
- Valve Springs
- Inspection
- Assembly
- Inspection
10 105 Pistons, Piston Rings, and Connecting Rods7 topics
- Disassembly
- Inspection
- Piston Rings
- Inspection
- Connecting Rods
- Inspection
- Bearing Oil Clearance Check
10 105 Pistons, Piston Rings, and Connecting Rod1 topic
- Assembly
10 103 Crankshaft Main Bearings49 topics
- Removal
- Inspection
- Crankshaft Journal Wear Limit and Bearing Usage
- Crankshaft Front Main Bearing (Bushing)
- Inspection
- Replacement
- Crankshaft Main Bearing
- Assembly
- Port Block
- Removal
- Installation
- Timing Gear
- Inspection
- Disassembly
- Inspection
- Assembly
- Inspection
- Timing Gear Housing
- Front Oil Seal and Steering Pump Seal
- Replacement
- Crankshaft and Bearing Holder
- Assembly
- Rear Oil Seal and Backplate
- Installation
- Piston and Connecting Rod
- Oil Suction Pipe and Suction Strainer
- Installation
- Camshaft and Camshaft Gear
- Assembly
- Idler Gear, Oil Pump and Injection Timing
- Installation
- Timing Gear Cover
- Crankshaft Pulley
- Fuel Injection Pump
- Installation
- Power Steering Pump
- Head Gasket
- Assembly
- Valve Clearance Adjustment
- Installation
- Fan, Water Pump and External Oil Tube
- Installation
- Glow Plug and Connector
- Fuel Injector
- Fuel Piping
- Installation
- Alternator and Temperature Sending Switch
- Exhaust Manifold, Radiator, and Air Cleaner
- Installation
10 304 Description of Operation -- Engine Lubrication System
10 206 Engine Oil Filter8 topics
- Removal
- Inspection
- Installation and Adjustment
- Engine Oil Pressure Check
- Oil Pressure Relief Valve
- Removal
- Installation
- Oil Consumption
10 400 Description of Operation -- Cooling System
Maintenance6 topics
- Coolant
- Thermostat
- Water Pump
- Cooling Fan
- Radiator
- Radiator Cap
Overhaul -- Cooling System3 topics
- Removal
- Inspection and Repair
- Installation
10 402 Water Pump and Thermostat5 topics
- Removal
- Inspection and Repair
- Assembly
- Installation
- Compression Test and Tools
Specifications
10 242 Description and Operation -- Injection Pump
10 236 Pumping Elements
10 214 Delivery Valves
Troubleshooting -- General
Troubleshooting -- Fuel Injectors
Troubleshooting -- Governor2 topics
- Injection Pump
- Installation
Timing and Governor Adjustments
10 230 Installation Using Original Pump and Drive Components4 topics
- Install a New Pump or Drive Component
- Spill-timing Procedure
- Bleeding the Fuel System
- Full Screw/High Idle Adjustment
10 230 Description of Operation -- Governor4 topics
- Governor
- Disassembly
- Assembly
- Adjustments
10 218 Description and Operation -- Injectors13 topics
- Injector
- Removal
- Disassembly
- Assembly and Adjustment
- Engine Breather Valve
- Installation
- Single Clutch
- Free Play Adjustment
- x 3 Transmission
- Disassembly
- Removal
- Installation
- Assembly
Description and Overhaul -- Servicing Clutch-Related Components
18 110 Clutch Pilot Bearing -- 9 x 3 Gear Transmission Only11 topics
- Inspection
- Installation
- Clutch Release Bearing
- Inspection
- Assembly
- Flywheel Dimensions
- Clutch Cross Shaft Bushings
- Assembly
- Clutch Pedal Bushings
- Removal
- Assembly
Clutch Linkage Adjustment
Description and Operation -- 9 x 3 Gear Transmission1 topic
- x 3 Gear Transmission -- Power Flow
Overhaul27 topics
- Transmission Preparation
- Removal
- Transmission Shift Cover
- Disassembly
- Input Shaft, Idler Gear and Countershaft Gear
- Main Shaft
- Front Wheel Drive Shaft
- Countershaft
- Range and Rear PTO Shift Rail and Fork
- Pinion Shaft
- PTO Front Countershaft
- Mid-Mount PTO Idler Shaft
- Mid-Range Gear Case
- Disassembly
- Inspection
- Assembly
- Rear PTO Countershaft
- Assembly
- Installation
- Shift Rail and Fork
- Installation
- Assembly
- Front Wheel Drive Shift Cover
- Assembly
- Rear Transmission -- 9 x 3 Transmission
- Installation
- Front Wheel Drive
25 100 Description and Operation -- Front Axle - Front Wheel Drive3 topics
- Front Axle
- Front-Wheel Drive Front Axle
- Removal
25 102 Differential13 topics
- Disassembly
- Inspection
- Axle
- Differential
- Assembly
- Pinion
- Ring Gear to Pinion Backlash Check (Using Original Components)
- Ring Gear to Pinion Backlash Check (Using New Components)
- Shim Calculation - Alternate Method
- Pinion-To-Ring Gear Tooth Contact Adjustment
- Installation
- Final Pinion and Wheel Shaft
- Backlash Adjustment
27 106 Description and Operation -- General Information
27 110 Differential Lock
27 126 Rear Axle and Brakes
27 106 Differential12 topics
- Removal
- Drive Pinion
- Disassembly
- Inspection
- Assembly
- Rear Axle and Brakes
- Rear Axle Disassembly
- Inspection
- Rear Axle Assembly
- Disassembly
- Assembly
- Ring Gear and Pinion Gear Pattern Adjustment
29 202 Description and Operation -- Hydrostatic Transmission
29 212 Variable Displacement Pump
29 212 Fixed Displacement Motor4 topics
- Fluid Flow
- Neutral Position
- Forward Position
- Reverse Position
Overhaul -- Hydrostatic Transmission1 topic
- the Extension Housing and Rear Transmission
29 202 Hydrostatic Unit25 topics
- Removal
- Precautions Before Disassembly
- Motor and Port Block
- Disassembly
- Hydrostatic Motor
- Disassembly
- Hydrostatic Motor Shaft
- Disassembly
- Charge Pump
- Swash Plate
- Disassembly
- Inspection
- Swash Plate/Charge Pump
- HST Piston Pump Cylinder Block
- HST Motor Cylinder Block
- Assembly
- Neutral and Feed Valves
- Disassembly
- Charge Pump Relief Valve
- Disassembly
- High Pressure Relief Valve
- Removal
- Installation
- Hydrostatic Pump and Port Block
- Assembly
29 204 Check Valve2 topics
- Disassembly
- Assembly
Pressure Tests1 topic
- Charge Pump (Low) Pressure Relief Valve
Description and Operation -- Gearbox
Overhaul -- Gearbox16 topics
- Gearbox
- Removal
- Transmission Drive Shaft and PTO Input Shaft
- Removal
- Main Bearing Holder Plate
- Removal
- FWD Drive Shaft (FWD Model only)
- Removal
- Installation
- Assembly
- Installation
- Assembly
- FWD Shaft (FWD Models only)
- Assembly
- Input Shaft, Transmission Drive Shaft and Retaining Plate
- Assembly
Overhaul and Adjustments -- Control Linkage
29 200 Control Linkage
Initial Adjustments19 topics
- Control Rod
- Pedal Stop
- HST Neutralizer
- Removal
- Disassembly
- Inspection
- Assembly
- Installation
- HST Neutral Adjustment
- Linkage Damper
- Removal
- Pedal
- Removal
- Pedal Pivot Shaft
- Removal
- Damper, Pivot Shaft, Pedal and FWD Drive Shaft
- Assembly
- Rear PTO
- Mid-Mount PTO
Description and Operation -- PTO System
31 110 9 x 3 Gear Transmission
31 110 Hydrostatic Transmission
Overhaul -- Rear PTO
31 114 9 X 3 Rear PTO Output Shaft6 topics
- Removal
- Inspection
- Assembly
- HST Rear PTO Output Shaft
- Removal
- Assembly
Description and Operation -- Mid-Mount PTO1 topic
- Mid-Mount Power Take-Off
Overhaul -- Mid-Mount PTO
31 120 9 x 3 Optional Mid-Mount PTO7 topics
- Gearbox and Countershaft
- Removal
- Output Shaft
- Inspection
- Assembly
- Hydrostatic Transmission, Standard Mid-Mount PTO
- Removal
33 120 Brakes and Final Pinion4 topics
- Removal
- Inspection
- Assembly
- Brake Adjustment
Description and Operation -- Hydraulic System
35 000 Hydraulic System Circuits1 topic
- Oil Filter
35 080 Combination System Relief - Diverter Valve Manifold
35 200 Control Valve Assembly (HPL)1 topic
- Neutral Position
35 210 Lifting Position
35 210 Lowering Position1 topic
- Cylinder Head and Flow Control Valve
Overhaul -- Hydraulic System
35 110 Lift Cylinder1 topic
- Inspection and Repair
35 183 Cylinder Head (Flow Control Valve)12 topics
- Disassembly
- Inspection
- Assembly
- Control Valve
- Disassembly
- Assembly
- Lowering Valve
- Adjustment
- Diverter Valve and Relief Valve Manifold Assembly
- Inspection
- Adjustment Procedure
- Control Lever
Description and Operation -- Hydraulic Pump
35 304 Hydraulic Pump and Filter4 topics
- Hydraulic Pump
- Disassembly
- Inspection and Repair
- Assembly
Description and Operation -- Remote Valves
35 204 Remote Control Valves6 topics
- Hydraulic Manifold Block/Diverter Valve
- Single Spool Remote Control System
- Oil Flow
- Neutral Position
- Raising Position
- Lowering Position
35 184 Front (Double Spool) Remote Valve8 topics
- Double Spool Remote Control System
- Bucket and Lift Control -- Neutral Position
- Bucket Cylinder -- Dumping
- Bucket Cylinder -- REGEN
- Bucket Cylinder -- Rollback
- Lift Cylinder -- Raising
- Lift Cylinder -- Lowering
- Lift Cylinder -- Float Position
Overhaul -- Remote Valves13 topics
- Single Spool Valve (Rear Remote Valve)
- Removal
- Disassembly
- Assembly
- Double Spool Remote Valve
- Double Spool Remote Valve (Front Remote Valve)
- Removal
- Disassembly
- Lift Spool
- Bucket REGEN Spool
- Lift Spool
- Bucket REGEN Spool
- Front Remote Valve Linkage
Pressure Testing2 topics
- Main System Relief Valve
- Torque Specifications
Description and Operation
41 204 Power Steering System6 topics
- Power Steering Control Valve
- Spool and Sleeve
- Drive Shaft
- Gerotor Pump
- Check Valve
- Relief Valve
41 206 Power Steering Pump1 topic
- Power Steering Cylinder
41 200 Power Steering Operation9 topics
- Fluid Flow -- Neutral Position
- Fluid Flow -- Left Turn
- Fluid Flow -- Right Turn
- Power Steering Manual Operation
- Power Steering System
- Steering Control Valve
- Disassembly
- Inspection
- Assembly
41 216 Steering Cylinder15 topics
- Inspection
- Oil Pump
- Installation
- Power Steering Tubes
- Pump, Steering Valve and Relief Valve
- Test Results
- Steering Cylinder
- Test Results
- Wheels and Tires -- Tread Setting
- Wheels and Tires Lug Bolt Torque
- Front and Rear Wheel Hub Bolt Torque Sequence
- Weights
- Wheels and Tires -- Weight Limitation
- Liquid Ballast
- Tire Inflation vs. Permissible Load
55 100 Component Location and Function -- Description and Operation7 topics
- Wiring Harnesses
- Ground Locations
- Battery
- Installation
- Fuse Block
- Main Fuse
- Replacement
Electrical System Components -- Description and Testing16 topics
- Key Switch
- Replacement
- Installation
- Testing
- Light Switch (Combination Switch)
- Removal
- Testing
- Hazard/Turn Signal Combination Switch
- Testing
- Installation
- x 3 Transmission Main (Speed) Gears, Safety Switch
- Testing
- Rear PTO Safety Switch and Mid PTO Safety Switch
- PTO Switch Adjustment
- Range Switch Adjustment HST Transmission
- Testing
55 408 Seat Safety Switch22 topics
- Removal
- Testing
- Installation
- Parking Brake Switch
- Testing
- Cruise Control Brake Release Switch (HST Only)
- Testing
- Relays
- Testing
- Flasher Controller
- Testing
- Safety Controller
- Testing
- Testing Alarm Circuit
- Diodes
- Testing
- Cruise Control Magnet (HST Models)
- Testing
- HST Speed Control (Cruise Control) Switch (HST Models only)
- Testing
- Glow Plugs
- Testing
55 414 Engine Sensors28 topics
- Fuel Shutoff Solenoid
- Testing
- Flasher Warning Light
- Rear Work Light (Optional)
- Safety Alarm (Buzzer)
- Inspection
- Electrical Wiring Diagram
- Starting Circuit (with or without Operator Present) HST Transmission
- Starting Circuit (with or without Operator Present) Gear Transmission
- Safe Operation Circuit (Operator Present) All Transmissions
- HST Transmission
- Gear Transmission
- Glow Plug Circuit (All Tractors)
- HST Cruise Control Circuit
- Front Work Lights Circuit
- Front Road Lights Circuit
- Hazard Flasher Circuit
- Left Turn Signal Circuit
- Right Turn Signal Circuit
- Engine Temperature Gauge Circuit
- Engine Oil Pressure Indicator Light Circuit
- Fuel Level Gauge Circuit
- Park Brake Indicator Light Circuit
- PTO Indicator Light Circuit (Rear and/or Mid PTO(s) Engaged)
- Tachometer Circuit
- Charging Circuit
- Auxiliary Power Socket Circuit
- Safety Alarm Circuit
Component Operation and Servicing2 topics
- Instrument Panel
- Removal
Component Testing and Replacement11 topics
- Fuel Gauge
- Testing
- Replacement
- Temperature Gauge
- Testing
- Replacement
- Tachometer
- Testing
- Replacement
- Instrument Panel, Indicator and Illumination Lights
- Bulb Replacement
Alternator Specifications
Alternator Troubleshooting
Troubleshooting -- Charging System2 topics
- Failure in Charging System
- Preliminary Checks
Description and Operation -- Charging System25 topics
- Alternator Component Construction
- Stator
- Rotor
- Rectifier
- End Frame
- Integrated Circuit (IC) Regulator
- Preliminary Alternator Tests
- Alternator Drive Belt
- Charging System Performance Tests
- Regulator Voltage Test
- Alternator Output Current Test
- M-Type IC Regulator Test Procedure (12 V Specification)
- Regulator By-Pass Test
- Alternator
- Removal
- Disassembly
- Component Testing and Inspection
- Stator
- Rotor
- Rectifier
- Testing
- Brushes
- Bearings
- Drive Pulley
- Alternator Bench Check
Starter Motor Specifications
Starter Motor Troubleshooting
Description and Operation -- Starting System
Overhaul -- Starter Motor11 topics
- Inspection and Repair
- Electrical Tests
- Armature Coil -- Continuity Test
- Grounded Armature Coil Test
- Brush Holder Ground Test
- Field Coil Continuity Test
- Field Coil Ground Test
- Solenoid Coil
- Pull-In Coil and Hold-In Coil Check
- Pull-In Coil Test
- Assembly of Starter
Description of Operation -- Platform19 topics
- Hood
- Removal
- Installation
- Steering Wheel
- Installation
- Instrument Panel and Console
- Installation
- Rear Panels
- Installation
- Fuel Tank
- Installation
- Seat and Seat Suspension
- Removal and Disassembly
- Roll Over Protection System (ROPS)
- Installation
- Fenders
- Side Steps
- Removal
- Installation
Inside this manual
Real pages from this service manual (717 pages). Open the sample pages (PDF, 639 KB)
- Diagram, page 185: SECTION 18 -- SINGLE CLUTCH -- CHAPTER 1
- Specifications, page 449: SECTION 35 -- HYDRAULIC SYSTEM -- CHAPTER 1
- Troubleshooting, page 603: SECTION 55 -- ELECTRICAL SYSTEM -- CHAPTER 2
- Color page, page 392: 6HFWLRQ 3RZHU 7DNH2II
- Color page, page 206: 6HFWLRQ 7UDQVPLVVLRQ
Other manuals for this machine
Save 10% on 2 manuals, 15% on 3 or more. Other manuals for the TC23DA, TC26DA are listed below. Editions cover different serial number ranges: check the serial coverage and tick only the ones that match your machine.
This manual: Service Manual 87367140$79.59
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This is a service manual
Here's how it compares to the other manual types.
This manual
Service manual
Factory repair procedures and technical information such as specifications, troubleshooting, and wiring and hydraulic diagrams, for the models and systems the manual covers. See What's inside for its topics.
Operator's manual
Safe operation, controls, maintenance schedules, lubrication points, inspections, and basic checks. Repair procedures are in the service manual.
Parts manual
Illustrated diagrams with factory part numbers for identifying components and ordering parts. Repair procedures are in the service manual.
Engine service manuals are sometimes sold separately, since certain machine models were offered with more than one engine option.
What it's used for
Factory manual for in-house farm and construction shop use. Straightforward, complete, and easy to follow. It contains the OEM information dealership service departments and parts counters use to diagnose problems, identify components, and perform maintenance or repairs correctly.
Service shops and owner/operators who repair their own equipment
Identifying correct parts and seeing how assemblies come apart and go back together
Keeping equipment running with less downtime
Factory manual, 717 pages
Quantity one is the manual described above.
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