Kioti DK35SE Manual
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Kioti DK35SE Manual

Steering system
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DK35SE/DK40SE/DK45SE/DK50SE
STEERING SYSTEM

TaBLe OF COnTenTS

1. SpeCIFICaTIOnS ................................... 9-2
1.1 Steering cylinder ...................................... 8-2
1.2 Steering unit ............................................. 8-2
2. OpeRaTInG pRInCIpLe ........................ 9-3
2.2 Operating principle ................................... 8-5
2.3 Structure ................................................... 8-9
3. TROUBLeSHOOTInG .......................... 9-12
4.2 Relief pressure adjustment .................... 8-13
4.3 Toe in ...................................................... 8-14
5. eXpLODeD VIeW ................................. 9-15
5.1 T595A steering cylinder .......................... 8-15
5.2 T596A steering cover ............................. 8-16
5.3 T605A steering unit ................................ 8-17
5.5 T845A-1 frame (HST) ............................. 8-19
5.6 T845A-2 frame (mechanical) .................. 8-20
6. SeRVICInG ............................................ 9-21
6.1 Steering cylinder .................................... 8-21
6.2 Removal of steering unit ........................ 8-22
installation of steering unit ..................... 8-23
6.4 Steering hose location ............................ 8-24
components ............................................ 8-26

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Summary of Contents for Kioti DK35SE

  • Page 1: Table Of Contents

    DK35SE/DK40SE/DK45SE/DK50SE STEERING SYSTEM TaBLe OF COnTenTS 1. SpeCIFICaTIOnS ........9-2 5. eXpLODeD VIeW ......... 9-15 1.1 Steering cylinder ........8-2 5.1 T595A steering cylinder ......8-15 1.2 Steering unit ..........8-2 5.2 T596A steering cover ......8-16 1.3 Tightening torque for main components ... 8-2 5.3 T605A steering unit ........

  • Page 2: Specifications

    DK35/40/45/50SE STEERING SYSTEM - SPECIFICATIONS 1. SpeCIFICaTIOnS 1.1 STeeRInG CYLInDeR Type ........Two cylinders with one rod single action (ram cylinder) Cylinder O.D......35 HP = 60 mm (2.3 in.), 40 ~ 50 HP = 65 mm (2.5 in.) Cylinder I.D......35 HP = 55 mm (2.1 in.), 40 ~ 50 HP = 60 mm (2.3 in.) Rod O.D.

  • Page 3: Operating Principle

    DK35/40/45/50SE STEERING SYSTEM - OPERATING PRINCIPLE 2. OpeRaTInG pRInCIpLe 2.1 DIaGRam FOR STeeRInG OpeRaTIOn meCHanICaL ▶ Operating pressure Return hydraulic pressure RETURN RETURN T46W902A COmpOnenTS (1) Gear pump (3) PTO clutch pack (5) Steering unit (7) Suction pipe (2) Modulator valve (4) 4WD clutch (6) Steering return pip The oil supplied from the gear pump (1) is sent to the...
  • Page 4 DK35/40/45/50SE STEERING SYSTEM - OPERATING PRINCIPLE ▶ Operating pressure Return hydraulic pressure T46W903A COmpOnenTS (1) Oil cooler pipe (2) Oil cooler (3) HST filter (4) HST For the HST type, the route that the oil is supplied to the steering unit is the same. However, the return line (1) supplies oil to the HST (4) through the HST oil cooler and the HST filter (3) for charging of the HST.

  • Page 5: Operating Principle

    DK35/40/45/50SE STEERING SYSTEM - OPERATING PRINCIPLE 2.2 OpeRaTInG pRInCIpLe Overviews This tractor has the full hydraulic, non-load reaction type steering system. The full hydraulic type completely relies on the hydrau- lic oil for transferring the power between the steering unit and the steering cylinder. It is not equipped with any mechanical transferring system, such as a drag link, pitman arm, rack or pinion.
  • Page 6 DK35/40/45/50SE STEERING SYSTEM - OPERATING PRINCIPLE Operation neUTRaL manUaL STeeRInG (RIGHT TURn) ▶ ▶ T46W906A T46W907A When the steering wheel is not moved, the valve plate The steering should be forced to be turned in some oc- (3) keeps its neutral position by the centering spring (4). casions, for example, when the engine does not start In this case, the oil flows to the P port through the mod- or the hydraulic pump is damaged.
  • Page 7 DK35/40/45/50SE STEERING SYSTEM - OPERATING PRINCIPLE RIGHT TURn OpeRaTIOn OF ReLIeF VaLVe (FOR ▶ ▶ RIGHT TURn) T46W908A T46W909A When turning the steering wheel in the right direction, If the steering cylinder rod is completely drawn out and the gerotor rotates and the valve plate is moved to the does not move, the rod does not move due to the stop- right side so that the gerotor (1) rotates further by the per even when its stroke is not complete or the wheels...
  • Page 8 DK35/40/45/50SE STEERING SYSTEM - OPERATING PRINCIPLE LeFT TURn ▶ T46W910A The operation for the left turn is same as that of right turn except for the oil flow direction. DT66-W00 Jan. 2007...

  • Page 9: Structure

    DK35/40/45/50SE STEERING SYSTEM - OPERATING PRINCIPLE 2.3 STRUCTURe Structure and major specifications for steering cylinder STRUCTURe ▶ T46W911A COmpOnenTS (1) Tube (4) Dust seal (7) Housing (A) Rod O.D (2) Packing (5) Rod (8) Bearing (B) Tube I.D (3) Bush (6) Ring (9) Snap ring (C) Tube O.D...
  • Page 10 DK35/40/45/50SE STEERING SYSTEM - OPERATING PRINCIPLE Steering unit T46W912A COmpOnenTS (1) Steering case assembly (7) Lace bearing (12) Pin (18) Endcap (2) Dust seal (8) Thrust needle bearing (13) O-ring (19) Bolt (3) Retainer ring (9) Control valve assembly (14) Spacer (20) Retainer bolt assembly (4) Seal gland bushing (9a) Relief valve...
  • Page 11 DK35/40/45/50SE STEERING SYSTEM - OPERATING PRINCIPLE pOWeR STeeRInG COnTROL mOTOR ▶ D. CHeCk VaLVe a. SpOOL anD SLeeVe The check valve normally remains closed, which pre- The spool (22) and sleeve (23) consists of the ro- vents the fluid from flowing from its inlet side to its out- tary valve to selectively switch the fluid passage as well as the direction of the fluid flow.

  • Page 12: Troubleshooting

    DK35/40/45/50SE STEERING SYSTEM - TROUBLESHOOTING 3. TROUBLeSHOOTInG problem Cause Remedy Tractor pulls to right or left - Improper tire size, inflation pressure - Adjust inflation pressure or replace or shape the tire - Worn or damaged tie rod end - Replace - Improper toe in, damaged steering - Replace cylinder rod and rod hinge...

  • Page 13: Measurement And Adjustment

    DK35/40/45/50SE STEERING SYSTEM - MEASUREMENT AND ADJUSTMENT . meaSURemenT anD aDjUSTmenT .1 STeeRInG ReLIeF OpenInG pReSSURe .2 ReLIeF pReSSURe aDjUSTmenT T46W913A T46W915A Disconnect the steering hose (1) to be tested and Turn the plug (A) for setting relief valve 90° at one connect the manometer (over 150 bar).

  • Page 14: Toe In

    DK35/40/45/50SE STEERING SYSTEM - MEASUREMENT AND ADJUSTMENT .3 TOe In T46W916A measurement of toe in Park the tractor on level ground and apply the parking brake. Lift the front tires slightly from the ground using a hydraulic jack. Place the steering wheel in the straight ahead posi- tion.

  • Page 15: Exploded View

    DK35/40/45/50SE STEERING SYSTEM - SYSTEM LAYOUT 5. eXpLODeD VIeW nOTeS The manufacturing parts are subject to change without notice. Therefore, check the parts catalog or electronic • manual for latest information. 5.1 T595a STeeRInG CYLInDeR T46W917A COmpOnenTS (1) Steering cylinder assembly (6) Nut (14) Cotter pin (LH, 35 HP)

  • Page 16: T596A Steering Cover

    DK35/40/45/50SE STEERING SYSTEM - SYSTEM LAYOUT 5.2 T596a STeeRInG COVeR T46W918A COmpOnenTS (1) Cylinder cover (LH) (2) Cylinder cover (RH) (3) Bolt with captive washer DT66-W00 Jan. 2007...

  • Page 17: T605A Steering Unit

    DK35/40/45/50SE STEERING SYSTEM - SYSTEM LAYOUT 5.3 T605a STeeRInG UnIT Mechanical T46W919A COmpOnenTS (1) Power steering unit (6) Connecter (10) Steering hose assembly (LH) (2) Hydraulic block (7) Elbow (11) Steering hose assembly (RH) (3) O-ring (8) Steering hose assembly (P) (12) Elbow (4) Socket bolt (9) Steering hose assembly (T)

  • Page 18: T875A Instrument Panel Cover

    DK35/40/45/50SE STEERING SYSTEM - SYSTEM LAYOUT 5. T875a InSTRUmenT paneL COVeR T46W920A COmpOnenTS (1) Instrument cover (T) (6) Steering wheel cover (RR) (11) Nut (2) Bolt with captive washer (7) Spring nut (12) Steering wheel cap (3) Cover (P) (8) Screw (13) Bellows (4) Bolt with captive washer (9) Steering wheel assembly...

  • Page 19: T845A-1 Frame (Hst)

    DK35/40/45/50SE STEERING SYSTEM - SYSTEM LAYOUT 5.5 T85a-1 FRame (HST) T46W921A COmpOnenTS (1) Frame assembly (17) Steering support (33) Lock gear (2) Flange bolt (18) Shaft (34) Lever (tilt) (3) Needle bearing (19) Snap ring (35) Fixing plate (tilt) (4) Tank support (20) Ball bearing (36) Bolt with captive washer (5) Flange bolt...

  • Page 20: T845A-2 Frame (Mechanical)

    DK35/40/45/50SE STEERING SYSTEM - SYSTEM LAYOUT 5.6 T85a-2 FRame (meCHanICaL) T46W922A COmpOnenTS (1) Frame assembly (17) Steering support (33) Lock gear (2) Flange bolt (18) Shaft (34) Lever (tilt) (3) Needle bearing (19) Snap ring (35) Fixing plate (tilt) (4) Tank support (20) Ball bearing (36) Bolt with captive washer (5) Flange bolt...

  • Page 21: Servicing

    DK35/40/45/50SE STEERING SYSTEM - SERvICING 6. SeRVICInG 6.1 STeeRInG CYLInDeR Removal Reinstallation T46W923A T46W925A Lift the front axle using a hydraulic jack. Tightening torque for pin mounting bolt in the steer- ing cylinder Remove the steering cylinder cover (1). Tightening torque for pin mounting bolt in steering cylinder (m8) ..

  • Page 22: Removal Of Steering Unit

    DK35/40/45/50SE STEERING SYSTEM - SERvICING 6.2 RemOVaL OF STeeRInG UnIT T46W926A Remove the upper cover (1), lower cover (3), front handle cover (2) and rear handle cover (4). T46W928A Remove the steering support (5) from the frame. Separate the steering unit (6) from the steering support (5).

  • Page 23: Tightening Torque Of Steering Hose And Installation Of Steering Unit

    DK35/40/45/50SE STEERING SYSTEM - SERvICING 6.3 TIGHTenInG TORqUe OF STeeRInG HOSe anD InSTaLLaTIOn OF STeeRInG UnIT Mechanical 기계식 HST식 T46W958A Connectors (2, 3, 4, 5, 6) at each port (P, T, L, R) of Clamp (15) tightening torque of return hose hydraulic block (1) ....

  • Page 24: Steering Hose Location

    DK35/40/45/50SE STEERING SYSTEM - SERvICING 6. STeeRInG HOSe LOCaTIOn T46W953A p (pUmp) T (ReTURn) ▶ ▶ T46W954A T46W955A This is the hydraulic pressure supply hose installed be- This is the return hose installed between steering unit tween modulator valve and steering unit. It is indicated and hydraulic block on the gear pump.
  • Page 25 DK35/40/45/50SE STEERING SYSTEM - SERvICING R (RIGHT TURn) L (LeFT TURn) ▶ ▶ T46W956A T46W957A This hose is installed between steering unit and RH This hose is installed between steering unit and LH steering cylinder. It is indicated by white tape on both steering cylinder.

  • Page 26: Disassembly Of Steering Unit Components

    DK35/40/45/50SE STEERING SYSTEM - SERvICING 6.5 DISaSSemBLY OF STeeRInG UnIT COmpOnenTS DISaSSemBLY OF pOWeR STeeRInG SYSTem ▶ T46W929A T46W931A (1) Connector (3) End cap (1) Check valve ball (2) The deepest bolt hole (2) Control motor Remove the steering motor from the vise and re- Turn over the control motor (2) and set it in a vise.
  • Page 27 DK35/40/45/50SE STEERING SYSTEM - SERvICING T46W933A T46W936A Remove the oil seal (1), dust seal (2) and O-ring (1 Sleeve (3) Pin (2) Spool seal (3) from the gland bushing. Remove the pin (3) from the sleeve (1) and spool (2) assembly.
  • Page 28 DK35/40/45/50SE STEERING SYSTEM - SERvICING InSpeCTIOn InSTaLLaTIOn ▶ ▶ Check the spool and sleeve for evidence of stick- ing, scuff marks and any other damage. If defec- tive, replace the spool and sleeve as a set. Check the pin for damage and check the internal teeth on the spool for damage.
  • Page 29 DK35/40/45/50SE STEERING SYSTEM - SERvICING T46W940A T46W942A (1) Pin (1) Thrust bearing race (2) Thrust bearing Position the spool and sleeve so that their ends are 7. Insert the thrust bearing race (1) and the thrust at the same height and insert the pin (1) through bearing (2) and make sure that the opposite thrust the assembly until its ends are below the surfaces bearing race (1) is seated on the sleeve and spool.
  • Page 30 DK35/40/45/50SE STEERING SYSTEM - SERvICING T46W945A T46W947A (1) O-ring (2) Spacer Install a new O-ring (1) in the housing and position the spacer (2) on the O-ring so that the holes are aligned with the holes in housing. T46W948A (1) Motor (3) Seal (2) O-ring (4) O-ring...
  • Page 31 DK35/40/45/50SE STEERING SYSTEM - SERvICING T46W949A T46W951A (1) Valley (3) Steering port side (1) Check ball retainer bolt (3) Steering motor (2) Mark (2) Hole Position the rotor and stator on the steering motor. 18. Replace the O-ring with new one. Position the end cap on the steering motor (3) and align its Align the holes in the spacer and stator.
  • Page 32 memO...

This manual is also suitable for:

Dk40seDk45seDk50se

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