This Kubota T1570A / T1670A / T1770A / T1870A Service Manual runs 378 pages with a single aim: returning the machine to factory spec. Twenty pages of troubleshooting walk every major system. Color-coded wiring diagrams map the full KRA (Kubota Reverse Awareness) circuit, and hydraulic schematics detail the hydrostatic transaxle. Fifteen pages of tightening torque tables cover general, metric, and UNC/UNF fasteners. Separate engine sections handle the rebuild sequence start to finish: crankcase, lubrication, fuel, and ignition. Fill the crankcase to exactly 1.9 L and set front tire pressure to 100 kPa cold before it rolls out of the shop. Bookmarks drop you straight into Transaxle, PTO, Brakes, or Electrical without scrolling. One download, works on any device.
What's Inside This Kubota T1570–T1870 Series Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 11-44 | Features, Identification (Machine, Engine, Mower), Handling Precautions For Electrical Parts And Wiring (Battery, Fuse, Connector, Handling Of Circuit Tester), Fuel And Lubricants |
| Sect 1 Engine 1 | 45-96 | Disassembling And Servicing (Disassembling And Assembling, Engine Body, Lubricating System, Fuel System, Checking And Adjusting, High Altitude Kit) |
| Sect 2 Engine 2 | 97-110 | Disassembling And Servicing (Disassembling And Assembling) |
| Sect 3 Transaxle | 111-134 | Structure (Hydrostatic Transaxle) |
| Sect 4 Brakes | 135-142 | Disassembling And Servicing (Checking And Adjusting, Disassembling And Assembling) |
| Sect 5 Front Axle | 143-150 | Disassembling And Servicing (Checking And Adjusting, Disassembling And Assembling, Separating Front Axle Assembly, Disassembling Front Axle) |
| Sect 6 Steering | 151-158 | Disassembling And Servicing (Disassembling And Assembling) |
| Sect 7 Fender and Lift | 159-170 | Disassembling And Servicing (Checking And Adjusting, Disassembling And Assembling, Separating Fender, Lift Linkage, Lift Lever) |
| Sect 8 PTO | 171-178 | Disassembling And Servicing (Checking And Adjusting, Disassembling And Assembling) |
| Sect 9 Electrical 1 | 179-212 | Wiring Diagram (Color Of Wiring), Kra System |
| Sect 10 Electrical 2 | 213-240 | Wiring Diagram (Color Of Wiring), Kra System |
| Sect 11 Mower | 241-254 | Disassembling And Servicing (Checking And Adjusting, Disassembling And Assembling) |
| Sect P Engine Body | 255-378 | Safety And General Information, Air Cleaner And Air Intake System, Fuel System And Governor, Lubrication System, Electrical System And Components, Disassembly, Reconditioning |
Every system also includes tightening torques, troubleshooting, checking, and servicing specifications.
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| T1570A | ||
| Fuel Tank Capacity | 11.0 L (2.9 U.S.gals., 2.4 Imp.gals.) | p. 7 |
| Hydrostatic Transmission Case Capacity | 2.3 L | p. 7 |
| T1670A, T1770A, T1870A | ||
| Fuel Tank Capacity | 15.0 L (3.9 U.S.gals., 3.3 Imp.gals.) | p. 7 |
| All Models | ||
| Engine Crankcase Capacity | 1.9 L | p. 7 |
| Front Tire Pressure (cold) | 100 kPa | p. 28 |
| Rear Tire Pressure (cold) | 70 kPa | p. 28 |
| Engine Oil Change Interval | 100 hours | p. 261 |
| Spark Plug Gap (Engine 1) | 1.02 mm | p. 53 |
| Spark Plug Torque (Engine 1) | 38.0 to 43.4 N·m | p. 54 |
| PTO Tension Spring Length | 69 to 72 mm | p. 174 |
| Blade Screw Torque | 102.9 to 117.6 N·m | p. 246 |
| Steering Wheel Play | 20 to 30 mm | p. 154 |
Kubota T1570–T1870 Series Common Problems This Manual Covers
Kubota T1570A riding mower wanders left and right with excessive slop in the steering wheel. p. 154
Inspect the steering linkage for wear, then measure steering wheel play using page 154. If play exceeds the 20 to 30 mm range, adjust or replace the worn parts and retighten all hardware.
Manual Section: Steering TroubleshootingExcessive vibration from the mower deck when engaging the PTO and blade does not rotate properly. p. 246
Remove the deck and check the blades and spindles. Confirm the blade screws are tight, then torque them to 102.9 to 117.6 N·m per page 246. Swap out any bent blade or damaged belt before running again.
Manual Section: Mower TroubleshootingPTO belt slips under heavy load and the cutting blades stop spinning in thick grass. p. 174
Check the PTO belt for glazing, cracking, or heavy wear. Measure the tension spring length against page 174, then adjust the linkage until the spring sits at exactly 69 to 72 mm. If tensioning doesn't hold, replace the belt.
Manual Section: PTO System TroubleshootingEngine cranks rapidly but will not start or sputter after sitting idle through the winter. p. 53
Pull the spark plugs and look for fouling or fuel saturation. Set the gap to 1.02 mm per page 53, reinstall, and torque each plug to 38.0 to 43.4 N·m following page 54.
Manual Section: Engine Troubleshooting (General)Frequently Asked Questions
What are the recommended service intervals?
Maintenance runs on a set schedule. Daily, top off the fuel tank and check the oil level. Every 25 hours, service the precleaner element; every 100 hours, replace the air cleaner element. Wear parts like the fuel line get replaced every 2 years.
What fluids and capacities does this machine require?
Fuel tank capacity is 11.0 L (2.9 U.S.gals.) on the T1570A and 15.0 L (3.9 U.S.gals.) on the T1670A, T1770A, and T1870A, all running unleaded gasoline 87 octane or higher. The crankcase takes 1.9 L (2.0 U.S.qts.) of API SG, SH, SJ or higher oil. Hydrostatic transmission cases hold 2.3 L (2.4 U.S.qts.) on the T1570A and 3.6 L (3.8 U.S.qts.) on the others, using API SH, SJ or CD SAE 20W-50 oil.
How to troubleshoot engine won't start?
A no-crank condition usually traces to a discharged battery, a failing starter, or a blown slow blow fuse. Check the battery's specific gravity and charge or replace it, then repair or replace the starter or fuse as needed. Defective main, PTO, brake, or seat switches and a disconnected wiring harness can also be at fault.
What are the hydraulic system specifications?
On the T1570A, the hydrostatic transmission case holds 2.3 L (2.4 U.S.qts., 2.0 Imp.qts.); on the T1670A, T1770A, and T1870A it holds 3.6 L (3.8 U.S.qts., 3.2 Imp.qts.). Fill it with engine oil rated API SH, SJ or CD, SAE 20W-50.
What format is this Kubota T1570–T1870 Series manual in?
This is a 378-page searchable PDF ready for immediate download. Pull it up on your phone right at the machine. No shipping, no waiting.
Are there any print restrictions on this Kubota T1570–T1870 Series manual?
Yes. The PDF carries no DRM restrictions, so print any page or section your shop needs. Works with any standard printer.
Does this Kubota T1570–T1870 Series manual include hydraulic schematics?
Yes. Full hydraulic diagrams are included, covering circuits, valve locations, and component specs for the Kubota T1570–T1870 Series.
Document Quality
This document is a scanned PDF with an OCR text layer, allowing you to search and copy the full text. Text quality is generally crisp and readable throughout, with no blurry or faded sections. Diagrams and illustrations are a mix of sharp line drawings and clear raster images, with all labels remaining perfectly readable. Pages are clean with no notable scan artifacts, stains, marks, or skewed content. There are a few blank filler pages interspersed within the document.
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