Service Manual

Rev. 000

This service manual was written expressly for Toro service technicians. The Toro company has made every effort to

make the information in this manual complete and correct.

Basic shop safety knowledge and mechanical/electrical skills are assumed. The Table of Contents lists the systems

and the related topics covered in this manual.

For service information on drive systems, please refer to the Hydro-Gear BDP-10A/16A/21L Pump service manual

(form no. 492-4789), Hydro-Gear P Series Pump service manual (form no. BLN 52503) and Parker-Ross TF wheel

motor service manual (form no. 492-4753). For information speciﬁ c to the engines used on this unit, refer to the

appropriate engine manufacturer’s service and repair instructions.

Units covered on in this manual are: TX420 model years 2000 - 2008

TX425 model years 2002 - 2008

The manual may also be speciﬁ ed for use on later model products.

The hydraulic power system is precision machinery. Maintain strict cleanliness control during all stages of service

and repair. Cover or cap all hose ends and ﬁ ttings whenever they are exposed. Even a small amount of dirt or other

contamination can severely damage the system.

We are hopeful that you will ﬁ nd this manual a valuable addition to your service shop. If you have any questions or

comments regarding this manual, please contact us at the following address:

The Toro Company

LCB Technical Services

8111 Lyndale Avenue South

Bloomington, MN 55420

The Toro Company reserves the right to change product speciﬁ cations or this manual without notice.

ABOUT THIS MANUAL