Part of the John Deere Repair Manuals.
Whether the hydrostatic transaxle takes the right oil, how the operator presence interlock is supposed to behave, which grease belongs in a deck spindle: questions like these get settled once, by the factory. This John Deere 1445 technical manual PDF, Deere publication TM1806, runs 834 pages and covers five front mower models from the 1420 through the 1565, gas and diesel alike. Wiring diagrams trace the interlock circuits from seat switch to PTO switch to starter, hydraulic schematics lay out the lift and drive circuits line by line, and repair procedures fill well over half the book. Set your alternator belt deflection between 10 and 15 mm, then pull the crankshaft main bearing cap screws to 79 N·m (58 lb-ft), straight from the spec tables. Nobody to ask when it's just you and a machine older than the dealership's records? Bookmarked and text-searchable, this PDF answers, and the mower runs again.
What's Inside This John Deere 1420–1565 Manual
| System | Pages | Key Topics |
|---|---|---|
| Engine (Gas) - Specifications, Tests and Repair | 31-282 | General Specifications, Tests and Adjustments, Starting Motor Troubleshooting, Starter Solenoid, Engine Repair Procedures |
| Electrical - Schematics and Harnesses | 293-344 | Gas Series Schematics, Diesel Series Schematics, Harness Routing, Connector Locations |
| Electrical - Operation and Diagnostics | 345-469 | Circuit Operation, Test Procedures, Engine Will Not Crank Diagnosis, Starting Circuit Checks |
| Electrical - Tests, Adjustments, Repair and Cab | 470-506 | Component Testing, Adjustments, Electrical Repair, Cab Electrical |
| Power Train - Hydrostatic Diagnostics and Repair | 514-664 | Hydrostatic Drive Diagnosis, Transaxle Repair, Ground Speed Loss, Drive Component Overhaul |
| Steering - Diagnostics and Repair | 671-684 | Steering Diagnosis, Steering Component Repair |
| Brakes - Repair | 694-702 | Brake Repair Procedures |
| Hydraulics - Schematics, Diagnostics, Tests and Repair | 706-752 | Component Location, Hydraulic Schematics, Operation and Diagnostics, Tests and Adjustments, Hydraulic Repair |
| Attachments - Diagnostics and Repair | 758-804 | Deck and Attachment Diagnosis, Attachment Repair, Deck Spindle Service |
| Miscellaneous Repair | 808-835 | Miscellaneous Service Procedures |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Camshaft Attaching Cap Screw | 11 N•m (96 lb-in.) | p. 30 |
| Camshaft Gear Housing Cover Cap Screw | 9 N•m (78 lb-in.) | p. 30 |
| Alternator Belt Deflection | 10 - 15 mm (0.38 - 0.5 in.) | p. 6 |
| Thermostat Begin Opening Temperature | 69.5 - 72.5°C (157 - 163°F) | p. 48 |
| Thermostat Fully Open Temperature | 85°C (185°F) | p. 44 |
| Alternator Drive Belt Deflection at 98 N (22 lb-force) | 10 - 15 mm (0.40 - 0.60 in.) | p. 100 |
| 1420 | ||
| Engine Oil Capacity (Gas Engine) | 3.1 L | p. 31 |
| Cooling System Capacity (Gas Engine) | 6.6 L | p. 31 |
| 1435 | ||
| Engine Oil Capacity (Diesel Engine) | 2.7 L | p. 99 |
| Cooling System Capacity (Diesel Engine) | 6.6 L | p. 101 |
| 1445 and 1545 | ||
| Engine Oil Capacity (Diesel Engine) | 3.6 L | p. 100 |
| 1445 | ||
| Cooling System Capacity (Diesel Engine) | 7.1 L | p. 105 |
John Deere 1420–1565 Common Problems This Manual Covers
Gas engine hunts and surges at low speed, stalls when you back off the throttle
Work the Engine Malfunctions At Low Speed symptom chart on page 37: it starts with the choke (unusual smoke out of the muffler points straight at it, adjustment on page 36), then walks the rpm drop and stall checks step by step before you touch the carburetor.
Manual Section: Engine - gas diagnostics p. 37Starter rotates slowly or barely turns the engine over
The Starting Motor Troubleshooting Guide on page 38 begins with the battery: run the Battery Test on page 467 in the electrical section before condemning the starter, then follow the guide through the cable and solenoid checks.
Manual Section: Engine - gas diagnostics p. 38Machine will not move when the travel pedals are engaged
Start with Test Procedure A on page 515. The manual warns this condition is often not the power train at all: if the procedures do not correct it, check the brake system next. Page 516 carries the matching chart for a machine that moves but will not reach full speed.
Manual Section: Power train - hydro diagnostics p. 515Differential will not lock up when the differential lock pedal is depressed
Page 514 has the diagnostic: with the machine parked safely, check the differential lock linkage for wear or damage first, then follow the chart through the remaining steps.
Manual Section: Power train - hydro diagnostics p. 514Frequently Asked Questions
What is the engine oil capacity for the John Deere 1420 front mower?
The engine oil capacity for the John Deere 1420 front mower, including the filter, is 3.1 liters (3.3 quarts). p. 31
How do you fix John Deere 1435 diesel runs hot mowing, coolant boils over and engine shuts down under load?
Pull the rear screen and blow the radiator fins clean with compressed air first. Drain and refill with 6.6 L of coolant meeting the specs on page 25. Test the thermostat in a pan of heated water: if it lifts less than 8 mm (0.315 in.) above 85\u00b0C (185\u00b0F), replace it, per page 107. p. 25
How do you fix engine won't crank after key switch or wiring work, no starter click with brake set?
Check the seat, PTO, and park brake interlock switches before condemning the new key switch; the troubleshooting procedures start. Back-probe the cranking circuit against the wiring diagram. While you are in there, set alternator drive belt deflection to 10-15 mm (0.40-0.60 in.) at 98 N (22 lb-force) so the battery stays charged. p. 365
How do you fix hydrostatic drive sluggish or jerky, machine loses ground speed on slopes and in thick grass?
Drain the transaxle, replace the hydraulic oil filter, and refill with the hydrostatic transaxle oil called out on page 22. With the rear of the machine safely supported, purge air by cycling the pedal through full forward and reverse, holding each end 5 seconds, for five cycles. Then check the control linkage jam nuts for looseness. p. 22
Will this manual download right away?
You download the Technical Manual yourself: 834 pages, searchable PDF, available immediately. Keep a copy on every device you use.
Is this manual print-friendly?
Yes. The PDF has no DRM restrictions, so print any page or section you need for your shop. Works with any standard printer.
Are wiring diagrams part of this John Deere 1420-1565 Front Mower Technical Manual?
Yes, this John Deere 1420 & variants Technical Manual includes a wiring diagram for the electrical system. See page 297 for an example.
Reviews
There are no reviews yet.