Part of the New Holland Repair Manuals.
This is the factory service manual for the New Holland Workmaster 35 and Workmaster 40 compact tractors, Tier 4B (final), part number 48144024. It works through the tractor system by system, and it treats the hydrostatic drive as its own section rather than folding it into the transmission, which is how you will actually work on it. The hydraulic and HST chapters give the pump capacity, the relief settings and the exact pressure differentials at which each filter and cooler bypass opens.
What's Inside This New Holland Workmaster 35, Workmaster 40 Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction and Standard Torques | 1-56 | How to Use the Manual, Shop Safety, Standard Tightening Torques, Approved Fluids and Consumables, Model Identification |
| Engine | 57-158 | Engine and Crankcase, Fuel System and Filtration, Air Cleaner and Intake, Exhaust Aftertreatment, Cooling System and Fan Drive, Engine Removal and Overhaul |
| Clutch | 159-186 | Clutch and Components, Release Mechanism, Pedal Free Play, Clutch Removal and Refitting |
| Power Coupling | 187-194 | Engine to Transmission Coupling, Drive Shaft and Dampener, Coupling Service |
| Transmission | 195-288 | Gear Transmission and Range Unit, Shuttle, Shift Controls, Transmission Strip-Down and Reassembly |
| Four-Wheel Drive (4WD) System | 289-308 | 4WD Engagement Clutch and Control, Drive Shaft, 4WD Service |
| Front Axle System | 309-368 | Driven Front Axle, Bevel Drive and Differential, Hub Reducers, Steering Knuckles, Axle Rebuild |
| Rear Axle System | 369-418 | Rear Bevel Gear Pair and Differential, Differential Lock, Final Drives, Bearing Preload and Backlash |
| Hydrostatic Drive | 419-526 | Hydrostatic Pump and Motor, Charge and HST Filter Circuits with Their Bypass Settings, Ground Drive Control and Linkage, HST Pressure Testing and Overhaul |
| Power Take-Off (PTO) | 527-600 | Rear and Mid PTO Clutch and Brake, Speed Selection and Output Shaft Change, PTO Overhaul |
| Brakes and Controls | 601-630 | Service Brakes, Parking Brake, Pedal Adjustment, Bleeding the Brake Circuit |
| Hydraulic Systems | 631-750 | Hydraulic Pump with Its Rated Capacity, System and Safety Relief Valves, Two-Spool Control Valve, Rear and Mid Remote Valves, Lift Cylinder with Its Adjustable Drop Rate Valve, Oil Cooler and Its Bypass, Pressure Testing |
| Hitches, Drawbars and Implement Couplings | 751-786 | Rear Three-Point Hitch and Lift Links, Drawbars, Implement Coupling and Setting |
| Steering | 787-862 | Hydrostatic Steering Unit and Circuit, Steering Control Valve and Cylinder, Steering Column, Fault Finding |
| Wheels | 863-878 | Wheel and Tyre Fitment, Track Width Adjustment, Wheel Nut Torques |
| Electrical Systems: Circuits, Harnesses and Connectors | 879-1059 | Electrical System Overview, Complete Wire Harness Drawings, Connector Component Diagrams, Fuse and Relay Layouts, Starting and Charging Circuits |
| Electrical Systems: Electronic Modules and Cab Controls | 1060-1149 | Electronic Control Modules and Their Configuration, Cab Controls, Instruments and Switches |
| Electrical Systems: Fault Codes and Diagnostics | 1150-1526 | Fault-Code Index and Tables, Guided Diagnostic Test Procedures, Circuit-Level Troubleshooting |
| Platform, Cab, Bodywork and Decals | 1527-1591 | Cab and Platform Assembly, ROPS, Bodywork Panels, Hood and Grille, Glazing, Decals, Component Removal |
| Special Tool Index and ROPS Electrical Schematic | 1592-1595 | Special Service Tool Part Numbers and the ROPS Electrical Schematic, Drawing 48090750 |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Hydraulic pump | ||
| Capacity | 31.2 l/min (8.3 US gpm) at 2600 engine rpm | |
| Hydraulic system | ||
| System relief valve setting | 16671 kPa (2418 psi) | |
| Safety relief valve setting | 19609 kPa (2844 psi) | |
| Oil cooler bypass valve | ||
| Opening pressure differential | Starts to open at 414 kPa (60 psi), fully open at 538 kPa (78 psi) | |
| HST filter bypass valve | ||
| Opening pressure differential | Starts to open at 207 kPa (30 psi), fully open at 276 kPa (40 psi) | |
| Rear lift | ||
| Drop rate | Set by an adjustable drop rate valve with its own safety relief valve | |
| All models | ||
| Emissions tier | Tier 4B (final) | |
| Ground drive | Hydrostatic transmission with its own section and pressure tests | |
New Holland Workmaster 35, Workmaster 40 Common Problems This Manual Covers
The tractor is slow on hydraulics, or the lift will not raise a full load.
Measure against the two relief settings before you open anything. The pump should give 31.2 l/min at 2600 engine rpm, the system relief valve is set to 16671 kPa (2418 psi), and the safety relief valve above it to 19609 kPa (2844 psi). If flow is right and pressure is low, the system relief valve or a leaking spool is at fault. The lift also has its own adjustable drop rate valve and safety relief valve, worth checking before the cylinder.
Manual Section: Hydraulic SystemsThe hydrostatic drive feels weak, or it overheats in hot weather.
Check the bypass valves, since they quietly change how the system behaves. The oil cooler bypass fully opens at a 538 kPa (78 psi) differential and then no oil reaches the cooler at all, and the HST filter bypass fully opens at 276 kPa (40 psi) and then HST oil goes unfiltered. Cold thick oil or a clogged element opens both. Change the element, warm the oil and repeat the HST pressure test the drive section describes.
Manual Section: Hydrostatic DriveA fault code, a dead circuit, or a control that will not respond.
Read the code and work the fault-code tables, which give the conditions that set each code and a guided diagnostic naming what to measure and where. When the test points at a circuit, use the harness drawings and connector component diagrams and back-probe the pin they name. If the tractor is a ROPS machine, the schematic at the very back of the manual, drawing 48090750, is the one you want.
Manual Section: Electrical Systems: Fault Codes and DiagnosticsFrequently Asked Questions
Which tractors does this manual cover?
The Workmaster 35 and the Workmaster 40 compact tractors, Tier 4B (final), under part number 48144024. They share the chassis, the axles, the hydrostatic drive, the hydraulics and the electrical system, so nearly every procedure applies to both.
What hydraulic pressures and flows should I see?
Pump capacity is 31.2 l/min (8.3 US gpm) at 2600 engine rpm. The system relief valve is set to 16671 kPa (2418 psi) and the safety relief valve to 19609 kPa (2844 psi). Test against those two figures before you condemn the pump, because a pump that makes flow but not pressure points at the relief valve rather than the gears.
When do the filter and cooler bypasses open?
The oil cooler bypass valve starts to open at a 414 kPa (60 psi) pressure differential and is fully open at 538 kPa (78 psi), at which point oil no longer passes through the cooler. The HST filter bypass starts to open at 207 kPa (30 psi) and is fully open at 276 kPa (40 psi), at which point HST oil is not being filtered at all. Both matter more than they look on a cold morning.
Is the hydrostatic drive covered separately?
Yes, at pages 419 to 526, separate from the gear transmission section. It covers the hydrostatic pump and motor, the charge and filter circuits, the ground drive control and linkage, and the HST pressure test and overhaul procedures.
How big is the manual and can I search it?
It is 1595 pages in English, a searchable and printable PDF, and it closes with the ROPS electrical schematic, drawing 48090750. Search the text, print the pages you need for the bench, and keep the rest on a laptop in the workshop.
Is this New Holland Workmaster 35, Workmaster 40 manual a digital download?
This is a 1595-page searchable PDF (128 MB) ready for immediate download. Works on any device, so pull it up on your phone while you're under the hood. No shipping, no waiting.
Am I able to print pages from this New Holland Workmaster 35, Workmaster 40?
Yes. The PDF has no DRM restrictions, so print any page or section you need for your shop. Works with any standard printer.
