Kubota LA344, Workshop Manual

5. One lever quick touch 4 lines coupler.......................................................................................................3-5

5.1 Structure of one lever quick touch 4 lines coupler ............................................................................3-5

6. Auto lock attachment and detachment .....................................................................................................3-5

6.1 Outline of auto lock attachment and detachment..............................................................................3-5
6.2 Function of auto lock attachment and detachment ...........................................................................3-6

7. Mechanical loader frame standing mechanism ........................................................................................3-6

7.1 Structure of mechanical loader frame standing mechanism .............................................................3-6

8. 3rd function valve (If equipped) ................................................................................................................3-7

8.1 Structure of 3rd function valve ..........................................................................................................3-7
8.2 Function of 3rd function valve ...........................................................................................................3-8

8.2.1 Activation switch in off position .................................................................................................3-8
8.2.2 Activation switch in on position .................................................................................................3-9

SERVICING ..................................................................................................................................................... 3-11

1. Troubleshooting for front loader.............................................................................................................. 3-11
2. Tightening torques for front loader..........................................................................................................3-13
3. Checking and adjusting ..........................................................................................................................3-14

3.1 Loader stand ...................................................................................................................................3-14

3.1.1 Adjusting height of loader stand .............................................................................................3-14

3.2 Front hydraulic valve main switch and relay ...................................................................................3-17

3.2.1 Checking front hydraulic valve main switch continuity............................................................3-17
3.2.2 Checking connector voltage of front hydraulic valve main switch........................................... 3-18
3.2.3 Checking relay ........................................................................................................................3-18

3.3 3rd function solenoid valve..............................................................................................................3-19

3.3.1 Checking 3rd function solenoid valve continuity .....................................................................3-19
3.3.2 Checking connector voltage of 3rd function solenoid valve.................................................... 3-19

4. Disassembling and assembling ..............................................................................................................3-19

4.1 Removing and attaching front loader ..............................................................................................3-19

4.1.1 Removing loader.....................................................................................................................3-19
4.1.2 Reinstalling loader ..................................................................................................................3-22

4.2 Bucket, boom and hydraulic cylinders.............................................................................................3-26

4.2.1 Attaching attachments ............................................................................................................3-26
4.2.2 Detaching attachments ...........................................................................................................3-28
4.2.3 Removing bucket cylinder.......................................................................................................3-28
4.2.4 Removing boom cylinder and hydraulic tubes ........................................................................3-28
4.2.5 Removing piston rod assembly...............................................................................................3-29
4.2.6 Removing cylinder head, piston and nut.................................................................................3-29
4.2.7 Removing piston seal and O-ring ...........................................................................................3-30
4.2.8 Installing O-ring and piston seal .............................................................................................3-30

4.3 Side frames, front guard and main frames......................................................................................3-31

4.3.1 Removing side frames ............................................................................................................3-31
4.3.2 Removing front guard .............................................................................................................3-31
4.3.3 Removing main frames...........................................................................................................3-31

4.4 3rd function valve (If equipped).......................................................................................................3-32

4.4.1 Removing 3rd function valve ..................................................................................................3-32
4.4.2 Removing hydraulic tubes of 3rd function...............................................................................3-32

5. Servicing.................................................................................................................................................3-33

5.1 Piston rod ........................................................................................................................................3-33

5.1.1 Checking piston rod bend .......................................................................................................3-33

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LA344, LA344S

KiSC issued 02, 2017 A