Part of the John Deere Repair Manuals.
Electrical work fills the largest stretch of TM1975, the 532-page John Deere LT150 technical manual pdf that also covers the LT160, LT170, LT180 and LT190 lawn tractors, mapping the cranking circuit, the charging and shunt circuit, and the PTO with RIO circuit before you ever pull a harness loose. Wiring schematics trace each conductor through the ignition and shutoff circuit, and separate engine chapters break out Kohler, Briggs & Stratton and both Kawasaki FH500V and FH580V builds with their own troubleshooting trees, governor and choke adjustments, and cylinder head teardowns. Deck lift, blade removal, transaxle and traction drive belt service follow. Set the belt tensioner compression spring caps at 32 to 34 mm (1.26 to 1.34 in.), gap a Kohler plug at 1.0 mm (0.040 in.), and torque it to 27.1 N.m (240 lb-in.). Chasing a dead PTO circuit with a test light and no diagram wastes a Saturday. Bookmarks and a live text layer drop you into the right chapter in seconds.
What's Inside This John Deere LT150–LT190 Series Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | 3-4 | Manual Description, Table of Contents, Identification Numbers, Tools and Materials, Component Location |
| Safety | 5-8 | |
| Specifications and Information | 9-16 | Fastener Torques, Gasoline, Engine Oil, Transmission Oil, Gear Case Oil, Gear Transmission Grease, Lubricants, Oil Filters |
| Engine - Kohler | 17-66 | Engine Specifications, Engine Troubleshooting, Throttle Cable Adjustment, Choke Adjustment, Governor Adjustment, Fuel Pump Removal, Engine Removal, Cylinder Head Removal |
| Engine - Briggs & Stratton | 67-122 | Engine Specifications, Engine Diagnostics, Throttle Cable Adjustment, Choke Cable Adjustment, Fuel Shutoff Solenoid, Governor Adjustment, Cylinder Head Removal, Valve Removal |
| Engine - Kawasaki (FH500V) | 123-172 | Engine Specifications, Lubrication System, Engine Troubleshooting, Throttle Cable Adjustment, Choke Cable Adjustment, Governor Adjustment, Fuel Pump Removal, Cylinder Head Removal |
| Engine - Kawasaki (FH580V) | 173-228 | Engine Specifications, Lubrication System, Engine Troubleshooting, Throttle Cable Adjustment, Choke Cable Adjustment, Governor Adjustment, Fuel Pump Removal, Cylinder Head Removal |
| Electrical | 229-382 | Electrical Schematics, Wiring Harnesses, Power Circuit Operation, Cranking Circuit Operation, Ignition and Shutoff Circuit, Charging and Shunt Circuit, PTO with RIO Circuit |
| Power Train - Gear | 383-404 | Drive Components, PTO Components, Shift Linkage, Transaxle Components, Clutch Pedal, Brake System |
| Power Train - Hydrostatic | 405-430 | Transaxle Components, Drive Components, Forward and Reverse Pedals, Traction Drive Belt System, Freewheel System |
| Steering | 431-440 | Steering System Components, Toe-In Adjustment, Steering Gear Assembly, Front Axle |
| Brakes | 441-456 | Brake Pedal and Linkage, Brake System, Park Brake, Brake Linkage Adjustment, Brake Assembly |
| Attachments | 457-514 | Deck Lift Assembly, Mower Deck, Blade Removal, Mower Deck Removal, Mower Deck Lift Linkage, Idlers |
| Miscellaneous | 515-522 | Front Wheel, Front Wheel Bearing, Rear Wheel, Hood, Seat and Seat Support, Fuel Tank |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Spark Plug Gap | 1.0 mm (0.040 in.) | p. 20 |
| Spark Plug Gap - LT150/LT160/LT190 | 0.75 mm (0.030 in.) | p. 175 |
| Distance Between Plastic Caps of Compression Spring (Belt Tensioner Assembly) | 32 - 34 mm (1.26 - 1.34 in.) | p. 420 |
| Compression Spring | 32 - 34 mm (1.26 - 1.34 in.) | p. 420 |
| Idler Nut | 26 N•m (228 lb-in.) | p. 407 |
| Traction drive belt guide clearance | 3 mm (0.125 in.) | p. 470 |
| LT150, LT160 | ||
| Spark Plug Gap (Kohler) | 1.0 mm (0.040 in.) | p. 20 |
| LT170 | ||
| Spark Plug Gap (Briggs & Stratton) | 0.76 mm (0.030 in.) | p. 69 |
| LT180 | ||
| Spark Plug Gap (Kawasaki FH500V) | 1.0 mm (0.040 in.) | p. 125 |
| LT190 | ||
| Spark Plug Gap (Kawasaki FH580V) | 0.75 mm (0.030 in.) | p. 175 |
| 38 inch, 42C, 48C | ||
| Brake Pad To Spindle clearance | 2 - 3 mm (0.79 - 0.12 in.) | p. 475 |
| Minimum Brake Pad Thickness | 2 mm (0.079 in.) | p. 470 |
