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Part of the New Holland Repair Manuals.
Every one of the 685 pages in this New Holland Boomer 30, Boomer 35 Service Manual PDF (OEM #84373326) is dedicated to keeping your compact tractor running like it just rolled off the assembly line. You get complete hydraulic schematics tracing the open center remote valve, full electrical wiring diagrams, and step-by-step teardowns for both mechanical and hydrostatic transmissions. Open up to massive exploded views of the front axle and PTO assemblies, backed by dedicated troubleshooting charts to diagnose hard-starting issues fast. Verify the hydraulic lift system relief valve is hitting exactly 16671 kPa (2418 psi) before topping off the 4.7-liter engine crankcase. Stop wasting time looking for lost shop manuals. Grab this bookmarked file on your tablet, walk right up to the machine, and get the repair done today.
What's Inside This New Holland Boomer 30, Boomer 35 Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | 7-42 | Foreword, Foreword - Ecology and the Environment, International Symbols, Safety Rules, Basic Instructions - Important Notice Regarding Equipment Servicing |
| Hydraulic - Pneumatic - Electrical - Electronic Systems - a | 43-170 | Primary Hydraulic Power System - 10.A, Primary Hydraulic Power System Open Center Mechanical Remotevalve - 10.D, Electrical Power System - 30.A, Lighting System - 40.A |
| Engine and PTO in - B | 171-248 | Engine - 10.A, Fuel and Injection System - 20.A, Engine Coolant System - 50.A, Lubrication System - 60.A, Starting System - 80.A |
| Transmission, Drive and PTO Out - C | 249-472 | Power Coupling Clutch - 10.C, Transmission Mechanical - 20.B, Transmission Hydrostatic - 20.F, Rear PTO Mechanical - 40.B, Rear PTO Hydraulic - 40.C, Middle PTO - 44.A |
| Axles, Brakes and Steering - D | 473-592 | Front Axle - 10.A, Final Drive - 15.A, Steering Hydraulic - 20.C, Service Brake Mechanical - 30.B, Parking Brake Mechanical - 32.B |
| Frame and Cab - E | 593-634 | User Controls and Seat - 32.A, Safety Security Accessories Safety - 50.B |
| Hitch and Working Tool - H | 635-685 | Hitch Rear Hitch - 10.C |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Boomer 30 | ||
| Engine Gross Horsepower | 21 kW (28 Hp) | p. 31 |
| Boomer 35 | ||
| Engine Gross Horsepower | 28 kW (38 Hp) | p. 31 |
| All Models | ||
| Fuel Tank Capacity | 33.0 l (8.7 US gal) | p. 31 |
| Engine Crankcase Capacity (With Filter) | 4.7 l (5.0 US qt) | p. 31 |
| System Relief Valve Setting (Hydraulic Lift) | 16671 kPa (2418 psi) | p. 33 |
| Front Wheel Toe-In | 0 - 5 mm (0 - 0.20 in) | p. 32 |
| ROPS to Rear Axle Torque | 132 - 147 N·m (97 - 108 lb ft) | p. 35 |
| Service Brake Disc Thickness | 5.00 - 5.14 mm (0.1969 - 0.2024 in) | p. 568 |
| Steering Angle Inside | 48 degrees | p. 476 |
| HST Case Pressure | < 98 kPa (14 psi) | p. 362 |
New Holland Boomer 30, Boomer 35 Common Problems This Manual Covers
New Holland Boomer 30 hydraulic implement fails to lift under load or raises too slowly
Test the primary hydraulic power system using the troubleshooting procedures. Connect a test gauge and verify the system relief valve setting reaches exactly 16671 kPa (2418 psi) as specified on page 33. Inspect the pump inlet screen for debris and clean it.
Manual Section: PRIMARY HYDRAULIC POWER SYSTEM TroubleshootingHydrostatic transmission erratic operation, low power output, or tractor fails to stop at neutral
Inspect the HST filter for O-ring leakage or element implosion. Connect a diagnostic gauge to the test port and verify the HST case pressure stays below 98 kPa (14 psi) as shown on page 362. Adjust the control linkage if the machine creeps forward.
Manual Section: TRANSMISSION Hydrostatic - Troubleshooting For the HST unitSteering wheel excessively stiff during operation or slow response when turning the front axle
Inspect the steering control unit for external oil leakage. Measure the front wheel toe-in and adjust the tie rods until the measurement is 0 - 5 mm (0 - 0.20 in) as specified on page 32. Turn the wheel fully and verify the inside steering angle hits 48 degrees.
Manual Section: STEERING Hydraulic - Troubleshooting - For the steering control unitStarter energizes normally but the engine will not start or crank over completely
Test the safety circuit and transmission neutral switches. Drain the fuel system and fill the tank to its 33.0 l (8.7 US gal) capacity with fresh diesel. Drain the oil, replace the filter, and refill the crankcase to exactly 4.7 l (5.0 US qt).
Manual Section: Start control - Troubleshooting Safety circuit, HST transmissionFrequently Asked Questions
What are the general torque specifications for M12 engine bolts on the New Holland Boomer 35?
For M12 metric non-flanged hardware, the torque specification for Class 8.8 bolts is 93.2 N·m (68.7 lb ft) and for Class 10.9 bolts is 137 N·m (101 lb ft). These are general values to be used unless a specific requirement is indicated in the repair manual. p. 26
What are the torque specifications for the PTO clutch assembly bolts on the Boomer 30?
When assembling the PTO clutch, install bolts in opposite pairs and torque them to 25 - 30 N·m (18 - 22 lb ft). This ensures proper alignment and secure fastening of the clutch components. p. 255
What is the engine oil capacity with the filter for the New Holland Boomer 30/35?
The engine crankcase oil capacity, including the filter, is 4.7 liters (5.0 US quarts). This specification is important for proper lubrication and engine performance. p. 31
What is the cooling system capacity for the New Holland Boomer 30/35?
The cooling system capacity for both the Boomer 30 and Boomer 35 models is 4.5 liters (4.8 US quarts). Maintaining the correct coolant level is crucial for engine temperature regulation. p. 31
Is this New Holland Boomer 30, 35 SERVICE MANUAL a digital download?
You get a 685-page searchable PDF that downloads instantly after checkout. Open it on your laptop, tablet, or phone, and bring it right to the shop floor.
Am I able to print pages from this New Holland Boomer 30, 35 manual?
Yes. The PDF has no DRM restrictions, so print any page or section you need for your shop. Works with any standard printer.
Does this New Holland Boomer 30, 35 SERVICE MANUAL cover the hydraulic system?
Yes, this New Holland Boomer 30, 35 SERVICE MANUAL includes hydraulic system diagrams, circuit schematics, and component specifications.
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