Part of the New Holland Operator Manuals.
This New Holland Workmaster 33, 37 Operator Manual (OEM #47832587) covers one job across its 218 pages: keeping your compact tractor running the way New Holland built it. Controls and instruments are detailed throughout: seat belt, instrument panel, PTO switch, differential lock, and HST pedals. Operating procedures cover engine break-in, DPF regeneration, three-point linkage, and operation of both the HST and 12x12 synchronized transmission. The maintenance schedule runs from every-10-hour daily checks through 1,000-hour service, with hydraulic and HST oil filters due first at 50 hours, then every 300 hours after. Front wheel torque lands at 176-196 N·m; ROPS bottom bolts take 147 N·m. Both are factory figures pulled straight from the specs section. Stop chasing answers online while your machine sits idle, and bookmark any section by keyword to find it fast.
What's Inside This New Holland Workmaster 33, Workmaster 37 Operator Manual
| System | Pages | Key Topics |
|---|---|---|
| - General Information | 7-20 | Note to the Owner, Intended Use, Electro-Magnetic Compatibility (Emc), Manual Scope and Required Training Level, Metric and Imperial Units Abbreviations, Product Identification |
| - Safety Information | 21-52 | Precautionary Statements, Safety Rules, Do Not Operate Tag, Roll Over Protection Structure (ROPS), Ecology and the Environment, Safety Signs |
| - Controls and Instruments | 53-86 | Instrument Panel, Clutch Pedal, Brake Pedals, Power Take-Off (PTO) Switch, Key Switch, Differential Lock Pedal |
| - Operating Instructions | 87-124 | Engine Break-In Procedure, Diesel Particulate Filter (DPF) Regeneration, Power Take-Off (PTO) Operation, Three-Point Linkage, Starting the Engine, Stopping the Engine |
| - Transport Operations | 125-132 | External Lighting - Identification, Hazard Warning Light Operation, Turn Signal Operation, Driving the Vehicle, Carrying the Tractor on a Transporter, Towing |
| - Working Operations | 133-136 | Tractor Ballasting, Tractor Ballasting Weights, Liquid Ballast |
| - Maintenance | 137-190 | Maintenance Chart, Engine Oil and Filter, Fuel Filter, Hydraulic Oil Filter, Engine Belts, Wheels bolt/nut |
| - Troubleshooting | 191-194 | Engine - Troubleshooting, Clutch - Troubleshooting, Mechanical Service Brakes - Troubleshooting, Hydraulic Lift System - Troubleshooting, Steering - Troubleshooting |
| - Specifications | 195-206 | Wheel Tread Settings, Tire Inflation Pressures, Liquid Ballast, General Specifications, Tractor Dimensions |
| - Accessories | 207-208 | - |
| - Forms and Declarations | 209-214 | - |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| ROPS bottom portion mounting bolts torque | 147 N·m (108 lb ft) | p. 154 |
| ROPS cross brace mounting bolts torque | 60 N·m (41 lb ft) | p. 154 |
| Hydraulic oil seal replacement | Replace | p. 192 |
| Hydraulic oil filter replacement interval | after the first 50 hours of operation, and then following every 300 hours of operation thereafter | p. 153 |
| Hydrostatic (HST) oil filter replacement interval | after the first 50 hours of operation, and then following every 300 hours of operation thereafter | p. 153 |
| Cold - start aid type | Glow plug | p. 199 |
| Engine coolant temperature sensor normal signal | 0.11 to 25.4 ohms | p. 59 |
| Intake manifold temperature sensor normal signal | 0.08 to 4.85 volts | p. 60 |
| Radiator cap pressure | 90 kPa (12.8 psi) | p. 198 |
| (DPF) differential pressure sensor normal signal | 0.25 to 4.75 volts | p. 61 |
| DPF soot load for automatic regeneration | 60% or more of capacity | p. 90 |
New Holland Workmaster 33, Workmaster 37 Common Problems This Manual Covers
New Holland Workmaster enters safe mode with warning lights flashing, engine speed limited to 1800 RPM p. 191
Check the instrument panel warning lights against the error code reference on page 59. Inspect the connectors at the DPF differential pressure sensor; the normal signal range is 0.25 to 4.75 volts (page 61). Review the DPF regeneration procedure on page 90: once soot load hits 60% or more, run a manual regeneration cycle.
Manual Section: 8 - TroubleshootingEngine cranks slowly or fails to fire on first start attempt in cold weather p. 87
Hold the key switch in the preheat position until the glow plug indicator light goes out, then crank; the starting procedure is on page 87. If that indicator never lights up, work through the electrical troubleshooting steps on page 194. Confirm fuel is adequate for the job ahead.
Manual Section: 4 - Operating InstructionsRegeneration warning light stays on during field operation, exhaust temperature noticeably high p. 90
Verify the tractor is running under normal load; automatic DPF regeneration starts when soot load reaches 60% or more. Keep engine RPM stable and allow the full cycle to complete before shutting down. Should the warning persist after a complete cycle, turn to the troubleshooting procedures on page 191.
Manual Section: 4 - Operating InstructionsThree-point hitch won't raise implements fully or lifts very slowly under load p. 192
Check the hydraulic oil level and top up as needed, as it belongs on every daily service check. Confirm the hydraulic oil filter was replaced at 50 hours and every 300 hours after that (page 153). For more, see the hydraulic lift system troubleshooting steps on page 192.
Manual Section: 8 - TroubleshootingTractor creeps forward or backward in neutral, or HST feels sluggish and unresponsive under load p. 193
Confirm transmission and hydraulic oil is at the correct level per the specifications section. In cold weather, let the transmission warm up at low RPM before engaging work functions. When the tractor drifts in neutral or HST power feels low, follow the hydrostatic transmission troubleshooting steps on page 193.
Manual Section: 8 - TroubleshootingFrequently Asked Questions
How do I reset the DPF regen on a New Holland Workmaster 33?
To exit inhibited regeneration mode and return to auto regeneration, press the upper side (B) of the DPF switch for about two seconds. The DPF inhibited indicator light will then switch off. If you shut the tractor off during inhibited mode, the system returns to auto regeneration the next time you start it.
How do I clear a safe mode or fault code on a Workmaster 37?
There's no general 'clear a safe mode' or 'clear a fault code' procedure in the manual. For specific codes like AB15 (Battery), page 194 lists the correction as 'Check battery terminals and ground for corrosion' or 'Replace battery'. For any engine fault code analysis, contact your authorized NEW HOLLAND dealer.
What do error codes mean on a New Holland Workmaster 33/37?
The manual lists several engine fault codes: AB02 (Main/Sub speed sensor), AB04 (Foot throttle pedal position sensor), AB07 (Engine coolant temperature sensor), AB09 (Barometric pressure sensor), AB10 (Ambient temperature sensor), AB12 (Intake manifold temperature sensor), AB13 (Exhaust gas temperature sensor), AB14 (DPF differential pressure sensor), and AB15 (Battery). Each code lists a possible cause and a recommended check or correction, such as connector connections, wiring harnesses, or sensor signals (e.g., AB04: normal sensor signal 0.2 to 4.25 volts).
How do I force a regen on a Workmaster 37?
Use manual regeneration when the automatic cycle is inhibited or unsuccessful. First move the machine to a safe, well-ventilated area away from combustible materials. The display reads 'DPF ON' during this mode, and the tractor stays unusable until regeneration finishes.
What is the torque spec for Workmaster 33/37 wheel bolts or axle nuts?
Both front and rear wheel bolts/nuts on the Workmaster 33/37 torque to 176 - 196 N·m (130 - 145 lb ft). Check and retighten them after the first 5 hours, again at 50 hours, and every 300 hours after that.
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