Kubota KX121-3, KX161-3 Excavator Repair Manual

Kubota Excavator Model KX121-3, KX161-3

Table of Content of the Workshop Service Manual

I General
II Machine body
Mechanism Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .II-M-1
Service Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .II-S-1
III Engine
Mechanism Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .III-M-1
Service Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .III-S-1
IV Hydraulic System
Mechanism Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .IV-M-1
Service Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .IV-S-1
V Electrical System
KX121-3, KX161-3 EU-Version

Your KUBOTA dealer is always ready to help so that your excavator offers the best performance. After having carefully read this manual, you will realize that much of the routine maintenance can be done by yourself. Machines must be disassembled and assembled efficiently and safely. It is very important to thoroughly understand the construction and function of the machine, to make all appropriate preparations, and start operations according to the specified working procedures in this workshop service manual.

IMPORTANT INSPECTION ITEMS AFTER REASSEMBLING
a Operate the Kubota KX121-3, KX161-3 Excavator and check for Unusual Noise and Vibrations.
b Make Sure the Safety decals and Wire harness Clamps are in their Specified Positions.
c With the Machine Front in a Specified Posture, Check the Amount of Hydrauric Oil Checking the oil level (For further details, refer to the Excavator KX121-3, KX161-3 Operators Manual)
1) Park the machine on a level ground.
2) Make sure the hydraulic oil temperature is in the range of 10-30C (50-86F) and see if the oil level is within the specified zone of the oil level gauge.
3) Keep the machine front as shown as following posture.
Pump installing precaution
1) Checking
Check the following points before mounting the piston pump.
Is there any part damaged or lost during transportation
Is there any looseness at tightened parts
Are the port flange and drain port closed so tight as not to allow dust entry into the piston pump
2) Hydraulic oil
1. Recommended oil

Hydraulic oil is an important element which plays the role of power transmission and lubrication of various parts in hydraulic equipment. Selection and handling of hydraulic oil significantly affect the performance and service life of hydraulic equipment.

Hydraulic oil being used generally is lubricating oil of very good quality which must be excellent in lubricity, oxidation stability, anti-rust property and anti-emulsion property. In addition, it should have such a property as not to damage packings and seals.

Strictly avoid mixing different types of hydraulic oil.