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New Holland YT12.5–YT18H Service Manual (incl. Wiring)

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$24.95 USD · one-time payment

Model: YT12.5 | YT14 | YT16 | YT16H | YT18H
Type: Yard Tractor
Years: 1984-1992
Serial: YC
130 Pages·8.7 MB·Searchable PDF·English·Print-Ready
  • ✓ Wiring Diagrams
  • ✓ Hydraulic Schematics
  • ✓ Torque Specs
  • ✓ Bookmarks
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New Holland YT12.5, YT14, YT16, YT16H, YT18H, 09GN-2155, 9607430, 9801250, 9809209, 09GN-2151, 09GN-2152, 09GN-2153, 9607431, 9800686, 09GN-2198, 09GN-2199, 9607432, 9607481, 9800687, 9607482, 9800688, YT16 H, YT18 H, 09GN-2154, Yard Tractor, 16 H.P. Yard Tractor (Gear Drive), YT 16 Gear Drive: Exploded view diagram of Eaton Model 850 transaxle components.
New Holland YT12.5–YT18H Service Manual (incl. Wiring)
$24.95

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This 130-page New Holland YT12.5–YT18H Yard Tractor Service Manual (OEM #620-289) covers every gear drive and hydro drive configuration built from 1984 to 1992, across all five models: YT12.5, YT14, YT16, YT16H and YT18H. Open it and you get full wiring diagrams for both drive systems, a complete troubleshooting section for no-start and no-stop faults, and page after page of torque specifications broken down by fastener type. You'll also find the Eaton hydrostatic transaxle repair procedures most yard tractor manuals skip entirely. Set your engine's no-load speed between 3500 and 3700 RPM, and confirm PTO clutch field coil resistance reads 2.31 to 3.12 ohms before you chase a phantom electrical gremlin. No more staring at a seized traction belt guessing which bolt comes out first. This PDF carries bookmarks for every section, so you jump straight from the table of contents to the exact procedure, torque table, or wiring page you need, right from your phone in the shop.

What's Inside This Manual

SystemPagesKey Topics
Introduction and Safety21Personal Considerations, Equipment Considerations, Operational Considerations
Lubrication and Maintenance22Engine, Grease, All Other Pivot Points, Transaxle, Battery, Belt
Adjustments and Servicing - Gear Drive (Engine, Clutch & Transaxle)23-32Engine Removal, PTO Clutch/Brake Adjustment, Clutch Coil Check, Transaxle Removal, Brake Pad Replacement, Traction Drive Belt
Adjustments and Servicing - Gear Drive (Steering & Controls)33-41Front Axle Removal, Steering Shaft Removal, Steering Gear Adjustment, Foot Pedal Removal, Gear Shift Lever Adjustment, Throttle/Choke Cable Removal
Adjustments and Servicing - Gear Drive (Electrical System & Troubleshooting)42-54Electrical System Functions, Battery, Solenoid Check, Ignition Switch Check, Interlock Switch Check, Headlight Service, Fuse Replacement, PTO Warning Light
Adjustments and Servicing - Hydro Drive (Engine, Clutch & Transmission)60-71Engine Removal, PTO Clutch/Brake Adjustment, Clutch Coil Check, Hydrostatic Transmission Removal, Brake Pad Replacement, Hydro Drive Lever Adjustment, Traction Drive Belts
Adjustments and Servicing - Hydro Drive (Steering & Controls)72-79Front Axle Removal, Steering Shaft Removal, Steering Gear Adjustment, Foot Pedal Shaft Removal, Lift Lever Shaft Removal, Throttle/Choke Cable Removal
Adjustments and Servicing - Hydro Drive (Electrical System)80-88Electrical System Functions, Battery, Solenoid Check, Ammeter Check, Ignition Switch Check, Interlock Switch Check, Headlight Service, Fuse Replacement
Trouble-Shooting53Engine Will Not Crank to Start, Engine Turns Over But Fails to Start, Engine Starts with Foot Pedal Up or PTO Switch Engaged, Operator on Seat, Engine Fails to Stop
Bolt Torque Specifications54-92Type of Capscrew, Type of Fastener Used, Torque Factor, Standard Hex Nut, Cone Locknut, Into Tapped Hole
Eaton Hydraulics Division Repair Information93-112Product Identification and Ordering Information, Complete Disassembly, Axle Disassembly Procedures, Housing Disassembly Procedures, Fluid Recommendations
Repair Information 751 & 851 Hydrostatic Transaxle113-130Transaxle Remove & Replace, Traction Drive Brake Adjustment, Brake Pad Replacement

Quick Reference Specifications

SpecificationValuePage
All Models
Engine Max RPM (no load)3500-3700 RPMp. 23
Tire Pressure (front & rear)10 p.s.i.p. 23
PTO Clutch Field Coil Resistance2.31-3.12 ohmsp. 27
16 H.P. Yard Tractor (Hydro Drive)
Hydrostatic Transmission Oil Capacity22 ouncesp. 59
Brake Pad Holder Screw Torque85-110 in-lbsp. 68
Eaton Corporation Model 850 Transaxle
Transaxle Series 850 Pump Plate Screw Torque44 lb-inp. 105
Transaxle Series 850 Cover Hex Flange Screw Torque125 lb-inp. 105
BrandNew Holland
ModelYT12.5, YT14, YT16, YT16H, YT18H
Machine TypeYard Tractor
Manual TypeService Manual
LanguageEnglish
FormatSearchable PDF (Digital Download)
Pages130
File Size8.7 MB
Year Range1984-1992
Manual No.620-289
Serial RangeYC
Wiring DiagramsYes
Hydraulic SchematicsYes
Torque SpecificationsYes
Bookmarked / IndexedYes
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