Part of the New Holland Operator Manuals.
The New Holland Boomer 35, Boomer 40 operator manual PDF puts factory procedure behind every hour these compact tractors work: 296 pages under OEM number 51485726, covering both ROPS and cab configurations. DPF regeneration, PTO engagement, three-point linkage hookup, and hydrostatic transmission operation each get a full walkthrough, and the instrument panel section decodes the engine fault codes flashing at you. Maintenance takes the largest share of the book, sequenced by service hour from the daily oil and coolant checks through the 50-hour grease rounds out to the 1500-hour cooling system flush. Fill the transmission, rear axle, and hydraulic circuit with 32 L of fluid, and top the coolant to within 4 cm (1.6 in) of the filler neck. A parked tractor burns daylight the weather will not return. Bookmarked and text-searchable, this file settles the question fast and puts your Boomer back in the field.
What's Inside This New Holland Boomer 35, Boomer 40 Operator Manual
| System | Pages | Key Topics |
|---|---|---|
| General Information | 9-20 | Note to the Owner, Tractor Intended Use, Emissions Overview, Electro-Magnetic Compatibility, Manual Scope, Product Identification Number |
| Safety Information | 21-76 | Safety Rules and Signal Word Definitions, Safety Rules, Do Not Operate Tag, Folding Roll Over Protective Structure, Starting Up the Machine Safely, Stopping the Machine Safely |
| Controls and Instruments | 77-134 | Access to Operator's Platform (Operator's Platform Access - Roll Over Protective Structure, Cab Door, Cab Side Window, Cab Rear Window) |
| Operating Instructions | 135-182 | Commissioning the Unit (Engine Break-In Procedure, Diesel Particulate Filter Regeneration, Engine Speed Management – Roll Over Protection Structure, Engine Speed Management – Cab, Power Take Off Operation - Cab, Power Take-Off - Roll Over Protective Structure, Three-Point Linkage, Attaching Three-Point Equipment, Extendable Drawbar - Cab, Extendable Drawbar - Roll Over Protective Structure -, Top Link Adjustment, Hydraulic Power Lift Drop Rate Control Valve, Roll Over Protective Structure Fold Up/Down) |
| Transport Operations | 183-194 | Road Transport (External Lighting - Cab, External Lighting - Roll Over Protective Structure -, Hazard Warning Light Operation - Cab, Hazard Warning Light Operation - Roll Over Protective Structure -, Turn Signal Operation - Cab, Turn Signal Operation - Roll Over Protective Structure, Road Lights - Operation - Cab, Road Lights Operation - ROPS, Work Lights - Operation - Cab, Work Lights - Operation - Roll Over Protective Structure, Driving the Vehicle) |
| Working Operations | 195-200 | Tractor Ballasting |
| Maintenance | 201-266 | Maintenance Planning (Maintenance Chart: Roll-Over Protective Structure, Cab), Every 10 Hours or Daily (Engine: Oil Level - Check, Cooling System - Check) |
| Troubleshooting | 267-270 | Symptom (Engine - Troubleshooting, Clutch - Troubleshooting, Mechanical Service Brakes - Troubleshooting, Hydraulic Lift System - Troubleshooting, Steering - Troubleshooting, Hydrostatic Transmission - Troubleshooting, Electrical System - Troubleshooting) |
| Specifications | 271-284 | Wheel Tread Settings, Tire Inflation Pressures, Liquid Ballast, Consumables, Tractor Dimensions - Cab, Tractor Dimensions - ROPS |
| Accessories | 285-286 | Optional Equipment |
| Forms and Declarations | 287-296 | Pre-Delivery Report - Dealer's Copy, Pre-Delivery Report - Owner's Copy |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Maximum front weights (with extension bracket) | 136 kg (300 lb) | p. 198 |
| Maximum front weights (45 kg options) | 135 kg (300 lb) | p. 198 |
| Transmission, rear axle and includes hydraulics capacity | 32 L | p. 211 |
| Coolant level below filler neck | 4 cm (1.6 in) | p. 244 |
| Battery cold cranking ability | 660 A at -18 °C (0 °F) | p. 252 |
| Front Wheel Torque | 176 – 196 N·m (130 – 145 lb ft) | p. 259 |
| Rear Wheel Torque | 176 – 196 N·m (130 – 145 lb ft) | p. 259 |
| Thermostat start to open temperature | 82 °C (179.6 °F) | p. 273 |
| Thermostat fully open temperature | 95 °C (203 °F) | p. 273 |
| Trans/rear axle oil capacity | 32 L (8.5 US gal) | p. 274 |
| Steering system relief valve setting | 120 Kg/cm² (1707 psi) | p. 275 |
| Engine gross horsepower (Boomer 35) | 26 kW (35 Hp) | p. 273 |
New Holland Boomer 35, Boomer 40 Common Problems This Manual Covers
New Holland Boomer 40 temperature light climbing into the red zone during mowing, coolant boiling over
Clean the radiator debris screen and fins first; a plugged screen is the usual cause on these tractors. Check coolant with the engine cold: level should sit no more than 4 cm (1.6 in) below the filler neck, per page 244. If it still runs hot, work through the engine overheating steps on page 267 before the next cutting window.
Manual Section: Engine Troubleshooting p. 267Oil pressure warning light comes on at idle after the engine warms up
Check the oil level on level ground, with the loader curled out of the way of the dipstick. Fill to the full mark; the engine holds 5.5 L (5.8 US qt) with a new filter, per page 211. If the level is good and the light stays on, shut it down and call your dealer before the next field pass.
Manual Section: Maintenance p. 211Steering feels jerky and ratchets when turning with a full loader bucket
Check the transmission oil level first; the steering shares the 32 L (8.5 US gal) transmission and rear axle sump, per page 274, and a low sump lets the pump pull air. Top up, then cycle the wheel lock to lock several times to purge the air. If it still ratchets, follow the steering troubleshooting chart before hay season.
Manual Section: Steering TroubleshootingEngine cranks slowly and won't start on cold mornings after the tractor sits overnight
Check the battery terminals for corrosion and a tight hold-down before anything else. Test the battery under load; a healthy one delivers 660 A cold cranking at -18 °C (0 °F), per page 252. Verify the cold start aid cycles fully before cranking, and keep the shuttle in neutral with the clutch pedal all the way down.
Manual Section: Engine Troubleshooting p. 267Clutch slips pulling uphill or pedal has too much slack before it grabs
Measure free play at the clutch pedal and adjust it to 20 to 30 mm (0.79 to 1.18 in), the spec on page 224. Too little play keeps the clutch partly released and it will slip under drawbar load; too much and it will not release cleanly. Recheck after the first hard day on the three-point hitch.
Manual Section: Maintenance p. 224Frequently Asked Questions
What is the wheel bolt and nut torque on the New Holland Boomer 35 and Boomer 40?
The torque specification for both the front and rear wheel bolts and nuts is 176 – 196 N·m (130 – 145 lb ft). You should check and tighten these to the proper torque after the first 5 hours, the first 50 hours, and then every 300 hours of use. p. 221
How do I check the engine oil level on the New Holland Boomer 35 and Boomer 40?
Check the engine oil level daily or after every 10 hours of operation. With the engine stopped and the tractor on level ground, use the dipstick to check the level. Add oil through the filler hole if the level is below the (L) mark, ensuring it does not exceed the (H) mark. p. 216
What is the recommended transmission warm-up time on the New Holland Boomer 35 and Boomer 40 by ambient temperature?
The recommended warm-up time for the transmission depends on the ambient temperature. For temperatures above 0°C (32°F), the minimum warm-up time is 5 minutes. For temperatures between 0°C and -10°C (32°F to 14°F), it is 5 to 10 minutes. For -10°C to -20°C (14°F to -4°F), it is 10 to 15 minutes, and below -20°C (-4°F), it is more than 15 minutes. p. 174
What is the fuel tank capacity of the New Holland Boomer 35 and Boomer 40 Cab and ROPS models?
The fuel tank capacity for the Cab model is 47 L (12.4 US gal), and the fuel tank capacity for the Roll Over Protective Structure (ROPS) model is 40 L (11 US gal). p. 211
What is the brake pedal free play specification on the New Holland Boomer 35 and Boomer 40?
The brake pedal free play specification is 50.0 – 60.0 mm (1.96 – 2.36 in). If the measured free play exceeds this, you should refer to page 7-61 for the adjustment procedure. p. 225
What exactly do I receive with this New Holland Boomer 35 Operator Manual?
Instant PDF download. You get the full 296-page searchable Operator Manual immediately after payment. Open it on your laptop, tablet, or phone right in the shop.
Can I print a copy of this New Holland Boomer 35 Operator Manual for the shop?
Absolutely. No DRM or copy protection. Print the whole manual or just the pages you need. Any home or office printer works.
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