Description

Kubota T1570, T1670, T1770, T1870 Workshop Manual

You’ve got a Kubota T1570, T1670, T1770, or T1870 sitting in the bay and the fuel system is acting up. Or the hydrostatic transaxle is leaking and you don’t want to pull it blind. The aftermarket PDF you found online has a wiring diagram that doesn’t match the pinout you’re staring at. I’ve been there. Twenty-eight years turning wrenches and I learned the hard way: factory data or nothing. This Kubota T1570, T1670, T1770, T1870 Workshop Manual is the real print – 293 pages of the same material the dealer techs use. No reprint, no condensed version. You get the full table of contents, including separate ENGINE 1 and ENGINE 2 sections that give you the exact servicing specs for both engine variants. That’s a detail most generic manuals skip.

Engine 1 and Engine 2 – Separated, Not Combined

Kubota split the engine coverage into two chapters in this manual because the T1570/T1670 and the T1770/T1870 use different power plants. ENGINE 1 covers troubleshooting, servicing specifications for engine body, lubricating system, ignition system, and a dedicated tightening torque table. ENGINE 2 repeats that structure with its own set of specs. If you’re chasing a no-start on a T1870, you go straight to the ENGINE 2 section, not some generic flowchart. The manual gives you the checking and adjusting procedures for the fuel system, including the high altitude kit adjustments. That kind of detail saves you from pulling the injector pump for something a screw adjustment fixes.

Torque Specs for Metric and American Standard Fasteners

Section G (General) includes a whole subsection on tightening torques. You get separate tables for general use screws, metric screws/bolts/nuts, and American standard screws/bolts/nuts with UNC or UNF threads. Page numbers aren’t listed here, but when you open the PDF you’ll find those tables right after the fuel and lubricants page. I’ve seen bolts strip because a tech used a generic torque chart from a Snap-on poster. This manual gives you the factory torque values that match the T1570-T1870 hardware specifically. Use them.

Hydrostatic Transaxle – T1670, T1770, T1870 Specific

Those three models share a similar hydrostatic transaxle but the manual breaks out the checking, disassembling, and assembling procedures for each. You get troubleshooting for the hydrostatic transmission – which is a separate subsection – and then the step-by-step to separate the transaxle from the machine. The manual explicitly states “Checking, Disassembling and Servicing (T1670, T1770 and T1870)” in the table of contents. That means no guesswork about whether your T1670 procedure matches the T1870. It’s written for your model.

Safety Instructions Before You Open the Hood

Page 3 of this workshop manual starts with “SAFETY FIRST” in bold. It covers battery disconnect, parking brake set, engine stopped and key removed. It even tells you to tag the operator station. I know some of you skip that stuff because you’re in a hurry. Don’t. This manual also includes handling precautions for electrical parts and wiring – how to treat connectors, fuses, and the circuit tester. Blowing a fuse because you back-probed the wrong pin is a waste of billable time. The precautions are right there, so read them once and avoid the headache.

Fuel System: Checking and Adjusting

Fuel system coverage appears in both ENGINE sections. You get checking and adjusting procedures, servicing instructions, and the high altitude compensation kit details. If your Kubota is running rough or won’t rev past idle, the manual walks you through the fuel system troubleshooting table. There’s also a high altitude kit subsection – important if you’re working on machines that spend time above 5,000 feet. The manual doesn’t assume you know which jet or screw to turn; it gives you the factory specification.

Does This Manual Cover Wiring and Electrical?

Yes. The General section has a dedicated “HANDLING PRECAUTIONS FOR ELECTRICAL PARTS AND WIRING” subsection. It covers wiring battery, fuse, connector, and handling of circuit tester. There’s no full wiring diagram included in the TOC excerpt, but the manual does provide the wiring handling rules and precautions. For a full schematic you may need the Kubota electrical supplement, but this workshop manual gives you the servicing specs for the ignition system and electrical components tied to the engine.

Who Should Use This Manual

If you own a T1570, T1670, T1770, or T1870 and do your own maintenance – or run a small shop that takes in Kubota utility tractors – this manual is for you. The audience is anyone who needs factory torque values for the hydrostatic transaxle bolts, engine mounting bolts, and brake adjustment specs. Beginners can use it because the checking and adjusting sections are written with clear steps. Experienced techs will appreciate the separate tightening torque tables for metric vs. American standard fasteners. There’s a maintenance check list and daily/periodic check points at 25, 50, 100, 200, 300 hours and 2 years. That alone makes it worth having on the workbench.

Source Validity – OEM, Not Aftermarket

This is a Kubota factory workshop manual, published January 2002. The PDF is a direct scan of the original printed manual, not a third-party rewrite. Aftermarket manuals often combine multiple model years into one confusing document. This one is model-specific: T1570, T1670, T1770, T1870. The page numbers, section headers, and specs match the printed dealer version. If you’ve ever been burned by a Chilton or Haynes manual that said “see engine removal on page 56” and page 56 was blank, you’ll appreciate the difference.

FAQ

What page are the engine torque specs for the cylinder head on the T1770?

The tightening torque tables are in the General section under TIGHTENING TORQUES. You’ll find the metric and American standard values there. The ENGINE 2 section also has its own torque table. Look for the SERVICING SPECIFICATIONS subsection inside ENGINE 2 for the T1770-specific numbers. The manual doesn’t list page numbers in the TOC, but the PDF search is quick. Type “tightening torques” into your PDF reader and you’ll land on the right page within seconds.

Can I use this manual for other Kubota models like the B-series or L-series?

No. It covers only T1570, T1670, T1770, T1870.

I’ve torqued enough head bolts to know that a manual like this pays for itself the first time you avoid a stripped thread or a misdiagnosed fuel issue. Don’t trust a free PDF from a forum. Get the genuine factory data. Access the Factory Manual straight from AutoRepairManuals and keep it on your tablet or print it for the bench.

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• Kubota R420B R520B Workshop Manual – Factory Specs for Wheel Loaders
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• Kubota WG752-E2 DF752-E2 2003 Workshop Manual – Factory Specs

External reference: Manual Transmission basics for understanding driveline principles.

Another external reference: Manual Transmission design considerations.