New Holland Boomer 20/25 Compact Tractors OEM Service & Repair Manual

SERVICE MANUAL Boomer™ 20 Boomer™ 25 48017684 02/06/2016 EN

Link Product / Engine Product Market Product Engine Boomer™ 20 Europe S3L2 Boomer™ 25 Europe S3L2 48017684 02/06/2016

Contents INTRODUCTION Engine....................................................................................... 10 [10.001] Engine and crankcase ............................................................. 10.1 [10.304] Engine lubrication system .......................................................... 10.2 [10.400] Engine cooling system ............................................................. 10.3 Clutch ....................................................................................... 18 [18.110] Clutch and components ............................................................ 18.1 [18.112] Slip clutch or ﬂywheel damper ..................................................... 18.2 Transmission.............................................................................. 21 [21.114] Mechanical transmission ........................................................... 21.1 Front axle system ....................................................................... 25 [25.100] Powered front axle ................................................................. 25.1 [25.102] Front bevel gear set and differential ............................................... 25.2 [25.108] Final drive hub, steering knuckles, and shafts ..................................... 25.3 [25.310] Final drives ......................................................................... 25.4 Rear axle system ........................................................................ 27 [27.106] Rear bevel gear set and differential ................................................ 27.1 [27.124] Final drive hub, steering knuckles, and shafts ..................................... 27.2 Hydrostatic drive ......................................................................... 29 [29.100] Transmission and steering hydrostatic control ..................................... 29.1 [29.202] Hydrostatic transmission ........................................................... 29.2 [29.204] Reservoir, cooler, and lines ........................................................ 29.3 [29.218] Pump and motor components ...................................................... 29.4 Power Take-Off (PTO) ................................................................. 31 [31.101] Rear mechanical control ........................................................... 31.1 [31.104] Rear electro-hydraulic control ...................................................... 31.2 48017684 02/06/2016

[31.110] One-speed rear Power Take-Off (PTO) ............................................ 31.3 [31.120] Central Power Take-Off (PTO) ..................................................... 31.4 Brakes and controls .................................................................... 33 [33.110] Parking brake or parking lock ...................................................... 33.1 [33.120] Mechanical service brakes ......................................................... 33.2 Hydraulic systems....................................................................... 35 [35.000] Hydraulic systems .................................................................. 35.1 [35.104] Fixed displacement pump .......................................................... 35.2 [35.114] Three-point hitch control valve ..................................................... 35.3 [35.116] Three-point hitch cylinder .......................................................... 35.4 [35.204] Remote control valves ............................................................. 35.5 [35.300] Reservoir, cooler, and ﬁlters........................................................ 35.6 [35.350] Safety and main relief valves ...................................................... 35.7 Hitches, drawbars, and implement couplings .................................. 37 [37.110] Rear three-point hitch .............................................................. 37.1 Steering..................................................................................... 41 [41.106] Tie rods............................................................................. 41.1 [41.200] Hydraulic control components...................................................... 41.2 [41.216] Cylinders ........................................................................... 41.3 Wheels ...................................................................................... 44 [44.511] Front wheels........................................................................ 44.1 [44.520] Rear wheels ........................................................................ 44.2 Electrical systems ....................................................................... 55 [55.000] Electrical system ................................................................... 55.1 [55.010] Fuel injection system ............................................................... 55.2 [55.011] Fuel tank system ................................................................... 55.3 [55.012] Engine cooling system ............................................................. 55.4 48017684 02/06/2016

[55.013] Engine oil system .................................................................. 55.5 [55.031] Parking brake electrical system .................................................... 55.6 [55.048] Rear Power Take-Off (PTO) control system ....................................... 55.7 [55.100] Harnesses and connectors ......................................................... 55.8 [55.201] Engine starting system ............................................................. 55.9 [55.202] Cold start aid ..................................................................... 55.10 [55.302] Battery............................................................................ 55.11 [55.404] External lighting .................................................................. 55.12 [55.405] External lighting switches and relays ............................................ 55.13 [55.408] Warning indicators, alarms, and instruments .................................... 55.14 Platform, cab, bodywork, and decals ............................................. 90 [90.120] Mechanically-adjusted operator seat ............................................... 90.1 48017684 02/06/2016

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INTRODUCTION 48017684 02/06/2016 1

Contents INTRODUCTION Foreword ........................................................................................ 3 Foreword - Important notice regarding equipment servicing .................................... 4 International symbols ........................................................................... 5 Safety rules ..................................................................................... 6 Safety rules ..................................................................................... 7 Safety rules - Ecology and the environment .................................................... 8 Basic instructions hardware .................................................................... 9 Torque - Standard torque data for hydraulic connections ..................................... 10 Basic instructions - Shop and assembly ...................................................... 17 General specification - Tractors with Hydrostatic Transmission (HST) ....................... 19 General specification - Tractor with mechanical transmission ................................ 23 General specification ......................................................................... 26 Dimension .................................................................................... 27 Consumables ................................................................................. 30 Capacities ..................................................................................... 31 Product identification .......................................................................... 32 Product identification machine orientation .................................................... 34 48017684 02/06/2016 2

INTRODUCTION Foreword This repair manual provides the technical information needed to properly service the NEW HOLLAND models Boomer 20 and 25 tractors. Use this manual in conjunction with the operator's manual for complete operation, adjustment, and maintenance information On NEW HOLLAND equipment, left and right are determined by standing behind the unit, looking in the direction of travel. 48017684 02/06/2016 3

New Holland Boomer 20/25 Compact Tractors OEM Service & Repair Manual

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