Kubota B21, TL421 & BT751 Tractor Loader Backhoe Repair Manual

Kubota Tractor Model B21, TL421, BT751

Table of Content of the Workshop Service Manual

This Workshop Manual has been prepared to provide servicing personnel with information on the mechanism, service and maintenance of KUBOTA Tractor B21, KUBOTA Front Loader TL421 and KUBOTA Backhoe BT751 . It is divided into three parts, General, Mechanism and Servicing for each section.

General
Information on the tractor identification, the general precautions, maintenance check list, check and maintenance and special tools are described.
Mechanism
Information on the construction and function are included. This part should be understood before proceeding with troubleshooting, disassembling and servicing.
Refer to Diesel Engine / Tractor Mechanism Workshop Manual (Code No. 9789701873 / 97897-18200) for the one which has not been described to this workshop manual.
Servicing

Information on the troubleshooting, servicing specification lists, tightening torque, checking and adjusting, disassembling and assembling and servicing which cover procedures, precautions, factory specifications and allowable limits.

All information illustrations and specifications contained in this manual are based on the latest product information available at the time of publication.

During disassembly of the KUBOTA Tractor B21, KUBOTA Front Loader TL421 and KUBOTA Backhoe BT751, carefully arrange removed parts in a clean area to prevent confusion later. Screws, bolts and nuts should be installed in their original position to prevent reassembly errors.

When special tools are required, use KUBOTA genuine special tools. Special tools which are not frequently used should be made according to the drawings provided.
Before disassembling or servicing electrical wires, always disconnect the ground cable from the battery first.
Remove oil and dirt from parts before measuring.
Use only KUBOTA Tractor B21, KUBOTA Front Loader TL421 and KUBOTA Backhoe BT751 genuine parts for parts replacement to maintain machine performance and to assure safety.
Gaskets and O-rings must be replaced during reassembly.
Apply grease to new O-rings or oil seals before assembling.
See the figure left side.
When reassembling external snap rings or internal snap rings, they must be positioned so that sharp edge faces against the direction from which a force is applied. See the figure left side.
When inserting spring pins, their splits must face the direction from which a force is applied. See the figure left side.
To prevent damage to the hydraulic system, use only specified fluid or equivalent.