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Takeuchi Gear Box 357A10. Service Manual (1998) - page 2

Serrare le viti con una coppia di serraggio di

Ingrassare i componenti e reinserire il puntalino, la

ITA

ITA

49v51 Nm.

molla, la vite (versione meccanica). Serrare con una

Attenzione: serrare con il metodo incrociato.

coppia di serraggio max. di 80v100 Nm.

Schrauben mit einem Anziehdrehmoment zu

Einzelteile schmieren und Stift, Feder und Schraube

D

D

49v51 Nm anziehen.

einsetzen (mechanische AusfuÈ hrung). Mit einem An-

Achtung: Schrauben abwechselnd im Kreuz anziehen.

ziehdrehmoment zu max. 80v100 Nm anziehen.

a

b

Apretar los tornillos a un par de torsi

Ân de

Engrasar los componentes y volver a insertar el

ESP

ESP

49v51 Nm.

pasador, el muelle, el tornillo (versi

Ânmeca nica).

Cuidado: apretar con el me todo cruzado.

Apretar a un par de torsi

Ânma x. dei 80v100 Nm.

Serrer les vis aÁ un couple de serrage de

Graisser les composants et r

 ins

 rer la bute e, le

F

F

49v51 Nm.

ressort, la vis (mod

Á le me canique).

Attention: serrer avec la m

 thode crois

Âe.

Serrer aÁ un couple de serrage max. de 80(100 Nm.

Ingrassare i componenti e reinserire la sfera, la molla e

Montare l'interruttore di posizione marcia inserita con

ITA

ITA

la vite (versione idraulica).

rosetta e anello OR.

Serrare con una coppia max. di 80v100 Nm.

Serrare con una coppia di serraggio max. di 54,2 Nm.

Einzelteile schmieren und Kugel, Feder und Schraube

Schalter fuÈr die Position der Gangschaltung mit

D

D

einsetzen (hydraulische AusfuÈ hrung). Mit einem An-

Unterlegscheibe und O-Ring montieren. Mit einem

ziehdrehmoment zu 80v100 Nm anziehen.

Anziehdrehmoment zu max. 54,2 Nm anziehen.

c

d

Engrasar los componentes y volver a colocar la bola,

Montar el interruptor de posicioÂn marcha embragada

ESP

ESP

el muelle y el tornillos (versi

Ânhidra ulica).

con roseta y anillo OR.

Apretar a un par ma x. dei 80v100 Nm.

Apretar a un par de torsi

Ânma x. de 54,2 Nm.

Graisser les composants et r

 ins

 rer la spheÁ re, le

Monter l'interrupteur de position de vitesses incorpor

Â

F

F

ressort et la vis (modeÁ le hydraulique).

avec la rondelle et la bague OR.

Serrer aÁ un couple max. de 80v100 Nm.

Serrer aÁ un couple de serrage max. de 54,2 Nm.

Montare tappo di chiusura con rosetta e rilevatore di

ITA

giri. Serrare con una coppia max. di 25 Nm.

Stopfen mit Unterlegscheibe und Drehzahlmesser

D

montieren. Mit einem Anziehdrehmoment zu max. 25

Nm anziehen.

e

Montar el tapoÂn de cierre con la roseta y el detector de

ESP

revoluciones. Apretar a un par ma x. de 25 Nm.

Monter le bouchon de verrouilllage accompagne de la

F

rondelle et du compteur de tours. Serrer aÁ un couple

max. de 25 Nm.

35

ASSEMBLY OF DIRECTLY FLANGEDREDUCTIONGEAR357 - ASSEMBLAGGIOGRUPPORIDUTTORE 357 AFFLANGIATO- DIREKT GEFLANSCHTER

REDUZIERER 357 MONTIEREN - MONTAJE GRUPO REDUCTOR 357 CON BRIDA - ASSEMBLAGE DU GROUPE REDUCTEUR BRIDE 357

F1240129

F1240130

GB

a

GB

b

Re-fit the reduction unit onto the axle by spreading LOCTITE 510

Fasten the support planes (turn flange to assist assembly).

on the planes.

F1240131

F1240132

GB

c

GB

d

Insert screws by applying LOCTITE 510.

Screw down by placing the reduction unit in a vertical position in

relation to the axis.

F1240133

F1240134

GB

e

GB

f

Tighten screws using a torque wrench setting of 49±51 Nm.

Extract screws and remove the temporarily assembled cover.

36

Rimontare il riduttore sul ponte spalmando i piani con

Mandare in battuta i piani di appoggio (ruotare la

ITA

ITA

LOCTITE 510.

flangia per facilitare il montaggio).

Reduzierer auf die Triebachse montieren; zuvor die

AuflageflaÈ chen bis zum Anschlag bringen (Flansch

D

D

FlaÈ chen mit LOCTITE 510 schmieren.

drehen um die Montage zu erleichtern).

a

b

Volver a montar el reductor en el puente engrasando

Llevar a tope las superficies de apoyo (girar la brida

ESP

ESP

las superficies con LOCTITE 510.

para facilitar el montaje).

Remonter le r

Âducteur au pont en e talant sur les

Lancer les surfaces d'appui en but

Âe

(tourner la

F

F

surfaces du LOCTITE 510.

flasque pour faciliter le montage).

Inserire le viti spalmandole con LOCTITE 510.

Avvitare le viti posizionando il riduttore in modo

ITA

ITA

verticale rispetto l'asse.

Schrauben mit LOCTITE 510 schmieren und ein-

Schrauben festschrauben; dabei den Reduzierer

D

D

setzen.

senkrecht zur Achse halten.

c

d

Insertar los tornillos engrasa ndolos con LOCTITE 510.

Atornillar los tornillos posicionando el reductor de

ESP

ESP

manera vertical con respecto al eje.

Introduire les vis en les enduisant d'abord de

Visser les vis en pla

Ëant le re ducteur verticalement par

F

F

LOCTITE 510.

rapport aÁ l'axe.

Serrare le viti con una coppia di serraggio di

Asportare le viti e rimuovere il coperchio montato

ITA

ITA

49v51 Nm.

provvisoriamente

Schrauben mit einem Anziehdrehmoment zu

Schrauben abschrauben und voruÈ bergehend montier-

D

D

49v51 Nm anziehen.

ter Deckel abnehmen.

e

f

Apretar los tornillos a un par de torsi

Ân de

Sacar los tornillos y remover la tapa montada

ESP

ESP

49v51 Nm.

provisionalmente.

Serrer les vis aÁ un couple de serrage de

Enlever les vis et enlever le couvercle provisoirement

F

F

49v51 Nm.

mont

Â.

37

ASSEMBLY OF DIRECTLY FLANGEDREDUCTIONGEAR357 - ASSEMBLAGGIOGRUPPORIDUTTORE 357 AFFLANGIATO- DIREKT GEFLANSCHTER

REDUZIERER 357 MONTIEREN - MONTAJE GRUPO REDUCTOR 357 CON BRIDA - ASSEMBLAGE DU GROUPE REDUCTEUR BRIDE 357

F1240135

F1240136

GB

a

GB

b

Fasten the bearing by using a standard tool.

Measure dimension "A" between the bearing and the box plane

using an ordinary depth gauge (if parts are not replaced, use

disassembled distance washers).

B

S

F1240137

F1240138

GB

c

GB

d

Measure dimension "B" on the cover, between the bearing plane

Apply LOCTITE 510 on the surface, lubricate the sealing ring,

and bearing support. Calculate the dimension of the distance

insert the distance washers and re-assemble the cover with niche

washers required:

facing upwards.

S=Dimension B Ð Dimension A

Es: B=5.2±A=4.6 mm ± Backlash 0.2±0.3=Distance washer

required=0.4±0.3.

F1240139

GB

e

Fit screws after applying LOCTITE 510.

38

Mandare in battuta il cuscinetto utilizzando un

Rilevare la quota "A" fra cuscinetto e piano scatola

ITA

ITA

normale attrezzo.

usando un normale calibro di profondit

Á.

(Se non vengono sostituiti pezzi, utilizzare gli spessori

smontati).

Das Lager bis zum Anschlag bringen; dazu ein

Maû "A" zwischen Lager und SchachtelflaÈ che mit

D

D

gewoÈ hnliches Werkzeug verwenden.

einem gewoÈ hnlichen Kaliber messen

(wenn keine

Teile ausgewechselt werden, die abmontierten Di-

stanzstuÈ cke verwenden).

a

b

Llevar a tope el cojinete utilizando una herramienta

Registrar la cota "A" entre el cojinete y la superficie de

ESP

ESP

normal.

la caja utilizando un normal calibre de profundidad.

(Si no se sustituyen las piezas, utilizar los espesores

desmontados).

Lancer en but

ÂelepalieraÁ l'aide d'un outil normal.

Relever la cote "A" entre palier et surface de la boÃte

Á

F

F

l'aide d'un calibre de profondeur normal (S'il n'y a pas

de pi

Á ces

Á remplacer, utiliser les cales d

 monte es).

Rilevare la quota "B" sul coperchio fra piano e

Spalmare la superficie con LOCTITE 510, lubrificare

ITA

ITA

appoggio cuscinetto. Calcolare gli spessori da inserire

l'anello di tenuta, inserire gli spessori e rimontare il

S=Quota B±Quota A

coperchio con la nicchia rivolta verso l'alto.

Es: B=5,2±A=4,6 mm ± Gioco 0,2v0,3= Spessore da inseri-

re=0,4v0,3

Maû "B" am Deckel zwischen FlaÈ che und Auflage-

FlaÈ che mit LOCTITE 510 schmieren; Dichtungsring

D

D

flaÈ che des Lagers messen. Die einzulegenden Di-

schmieren; DistanzstuÈ cke einsetzen und Deckel mit

stanzstuÈ cke ausrechnen. S=Maû B±Maû A

Nische nach oben gerichtet, montieren.

Bsp: B=5,2±A=4,6 mm ± Spiel 0,2v0,3=einzusetzende Distanz-

c

stuÈ cke=0,4v0,3

d

Registrar la cota "B" en la tapa entre la superficie y el

Engrasar la superficie con LOCTITE 510, lubricar el

ESP

ESP

soporte del cojinete. Calcular los espesores que hay

segmento de compresio n, insertar los espesores y

que insertar S

= Cota B±Cota A

volver a montar la tapa con el hueco dirigido hacia

Es: B=5,2±A=4,6 mm ± Juego 0,2v0,3= Espesor a inser-

arriba.

tar=0,4v0,3

Relever la cote "B" sur le couvercle entre surface et

Enduire la surface de LOCTITE 510, lubrifier la bague

F

F

support palier. Calculer le nombre de cales

Á

d'

 tanch

 iteÂ, introduire les cales et remonter ensuite

introduire S=Cote B±Cote A

le couvercle avec le logement tourne vers le haut.

Exp: B=5,2±A=4,6 mm ± Jeu 0,2v0,3=Cales aÁ introduire

=0,4v0,3

Inseire le viti dopo everle spalmate con

ITA

LOCTITE 510.

Schrauben einsetzen; zuvor mit LOCTITE 510

D

schmieren.

e

Introducir los tornillos despueÂs de engrasarlos con

ESP

LOCTITE 510.

Introduire les vis apreÁs les avoir enduites de

F

LOCTITE 510.

39

ASSEMBLY OF DIRECTLY FLANGEDREDUCTIONGEAR357 - ASSEMBLAGGIOGRUPPORIDUTTORE 357 AFFLANGIATO- DIREKT GEFLANSCHTER

REDUZIERER 357 MONTIEREN - MONTAJE GRUPO REDUCTOR 357 CON BRIDA - ASSEMBLAGE DU GROUPE REDUCTEUR BRIDE 357

F1240140

F1240141

GB

a

GB

b

Tighten screws using a torque wrench setting of 49±51 Nm.

Assemble flange, O-ring and nut using LOCTITE 242.

F1240142

F1240143

GB

c

GB

d

Screw down the nut of the flange.

Tighten the nut using a torque wrench setting of 260±280 Nm.

F1240144

F1240069

GB

e

GB

f

Re-fix the protection plate after applying LOCTITE 510.

Complete flanged reduction gear 357 with mechanical gear control.

40

Serrare le viti con una coppia di serraggio di

Montare la flangia, l'anello OR e il dado con

ITA

ITA

49v51 Nm.

LOCTITE 242.

Schrauben mit einem Anziehdrehmoment zu

Flansch, O-Ring und Mutter mit LOCTITE 242

D

D

49v51 Nm anziehen.

schmieren und montieren.

a

b

Apretar los tornillos a un par de torsi

Ân de

Montar la brida, el anillo OR y la tuerca con

ESP

ESP

49v51 Nm.

LOCTITE 242.

Serrer les vis aÁ un couple de serrage de

Monter la flasque, la bague OR et l'e crou enduit de

F

F

49v51 Nm.

LOCTITE 242.

Avvitare il dado della flangia.

Serrare il dado con una coppia di serraggio di

ITA

ITA

260v280 Nm.

Flanschmutter festschrauben.

Mutter mit einem Anziehdrehmoment zu

D

D

260v280 Nm anziehen.

c

d

Atornillar la tuerca de la brida.

Apretar la tuerca a un par de torsi

Ân de

ESP

ESP

260v280 Nm.

Visser l'e crou de la flasque.

Serrer l'

 crou aÁ un couple de serrage de

F

F

260v280 Nm.

Rimontare lamiera di protezione dopo everla spalmata

Gruppo riduttore 357 afflangiato con comando marcia

ITA

ITA

con LOCTITE 510.

meccanico completo.

Schutzblech mit LOCTITE 510 schmieren und mon-

Ganzes direkt geflanschter Reduzierer 357 mit me-

D

D

tieren.

chanischer Gangschaltung.

e

f

Volver a montar la placa de protecci

Ân despu

Âs de

Grupo reductor 357 con brida con mando de marcha

ESP

ESP

engrasarla con LOCTITE 510.

meca nico completo.

Remonter la t

à le de protection apreÁs l'avoir enduite de

Groupe r

 ducteur brid

 357 aÁ commande de vitesses

F

F

LOCTITE 510.

me canique complet.

41

ASSEMBLY OF DIRECTLY FLANGEDREDUCTIONGEAR357 - ASSEMBLAGGIOGRUPPORIDUTTORE 357 AFFLANGIATO- DIREKT GEFLANSCHTER

REDUZIERER 357 MONTIEREN - MONTAJE GRUPO REDUCTOR 357 CON BRIDA - ASSEMBLAGE DU GROUPE REDUCTEUR BRIDE 357

F1240145

F1240144

GB

a

GB

b

Re-assemble all the parts of the gear control cylinder, according to

Re-fix the protection plate after applying LOCTITE 510 on it.

their arrangement.

F1240146

F1240147

GB

c

GB

d

Re-fit the gear control cylinder into place with its O-ring.

Re-fit screws and screw down.

F1240148

GB

e

Re-introduce the gear control rod after applying LOCTITE 242 on it.

42

Rimontare tutti i particolari del cilindro comando

Rimontare lamiera di protezione dopo averla spalmata

ITA

ITA

marcia come disposti in ordine.

con LOCTITE 510.

Alle Einzelteile des Zylinders des Gangschalters der

Schutzblech mit LOCTITE 510 schmieren und mon-

D

D

Reihenfolge nach montieren.

tieren.

a

b

Volver a montar todas las piezas del cilindro mando

Volver a montar la placa de protecci

Ân despu

Âs de

ESP

ESP

marcha dispuestos en su orden.

engrasarla con LOCTITE 510.

Remonter toutes les pieÁces du cylindre de commande

Remonter la t

à le de protection apreÁs l'avoir enduite de

F

F

de vitesses place dans l'ordre.

LOCTITE 510.

Rimontare il cilindro comando marcia completo di

Reinserire le viti ed avvitarle.

ITA

ITA

anello OR.

Zylinder des Gangschalters mit O-Ring montieren.

Schrauben einsetzen und festschrauben.

D

D

c

d

Volver a montar el cilindro mando marcha completo de

Volver a introducir los tornillos y atornillarlos.

ESP

ESP

anillo OR.

Remonter le cylindre de commande de vitesses

Introduire les vis et visser.

F

F

complet de bague OR.

Reinserire asta di comando marcia dopo averla

ITA

spalmata con LOCTITE 242.

Gangschalterhebel mit LOCTITE 242 schmieren und

D

montieren.

e

Volver a insertar la varilla de mando de la marcha

ESP

despueÂs de engrasarla con LOCTITE 242.

Introduire la tringle de commande de vitesses apr

Ás

F

l'avoir enduite de LOCTITE 242.

43

INSTALLATION OF HYDRAULIC GEAR CONTROL - INSTALLAZIONE COMANDO MARCIA IDRAULICO - HYDRAULISCHER GANGSCHALTUNG

MONTIEREN - MONTAJE MANDO MARCHA HIDRAULICO - INSTALLATION DE LA COMMANDE DE VITESSES HYDRAULIQUE

F1240149

F1240150

GB

a

GB

b

Tighten the gear control rod using a torque wrench setting of

Tighten gear control cylinder screws using a torque wrench setting

25±26 Nm.

of 49±51 Nm.

44

Serrare asta di comando marcia con una coppia di

Serrare le viti cilindro comando marcia con una coppia

ITA

ITA

serraggio di 25v26 Nm.

di serraggio di 49v51 Nm.

Den Gangschalterhebel mit einem Anziehdrehmoment

Die Zylinderschrauben des Gangschalters mit einem

D

D

zu 25v26 Nm anziehen.

Anziehdrehmoment zu 49v51 Nm anziehen.

a

b

Apretar la varilla de mando a un par de torsi

Ân de

Apretar los tornillos de mando de la marcha a un par

ESP

ESP

25v26 Nm.

de torsioÂn de 49v51 Nm.

Serrer la tringle de commande de vitesses aÁ un couple

Serrer les vis du cylindre de commande de vitesses

Á

F

F

de serrage de 25v26 Nm.

un couple de serrage de 49v51 Nm.

45

REV. 1

1

TB175W

TB175W

2

REV. 1

REV. 1

3

TB175W

INSTALLATION INSTRUCTIONS

532 044 001

7-way swivel joint for hydrau-

lic applications

Application

The introduction of dust and spray interferes with labyrinths

As rotating line connector for introducing hydraulic fluid

9 and 2 at the interface between housing 12 and rotor 11.

from at-rest to rotating machine parts. Example: in hydrau-

lic excavators to transfer energy from the rotatable upper

Cover 8 has a seat for fitting a rotating connector. This

assembly with pumps and control blocks to the lower

makes it possible to introduce hydraulic and compressed air

assembly with hydraulic motors for driving and hydrostatic

with a perfect separation of media within the swivel joint.

linkages.

Installation instructions

Other applications upon request.

The swivel joint is attached to flange 13 with adapter 14 and

fastened with three M16 bolts. The line connectors can then

Principles of operation

attach to the tubes.

Rotor 11 in housing 12 is maintained in the axial direction

by cover 8. Channels 5 run from connectors 7 on the upper

In the housing, there should be adequate play between

side of the housing to toroidal chambers 4 which are sealed

connector 6 and the fork. Line connectors must be flexible,

from each other by special gaskets 10. Each toroidal cham-

i.e., hoses. Additional sideways loads on the swivel joint

ber 4 is connected to a radial connector 1 in rotor 11 by an

must be avoided.

axial bore 3.

Slight leakage is possible between toroidal chambers when

no pressure is present. This drains away in a common

leakage channel. If the hydraulic circuits are separate, a

common oil container will be needed.

TB175W

4

REV. 1

APPLICATION

As swivel joint between moving and rotating machine parts.

Use preferably as part of a Grau combination swivel joint for

independent support of different circuits such as work and pre-control

hydraulics.

Some designs have a central bore for a cable. In these cases, fixing threads

are located in the cover for a slip ring mount.

OPERATION

The rotatable bearing supported rotor 2 in the housing is held in the

axial plane by cover 5.

Connectors 6 in the housing are connected by toroidal chambers 4,

axial bores 7 and intermediate piece 9 to connectors 11 in the

connector unit.

There is a seal between toroidal chambers 4 by means of gaskets 3, by

gaskets 8 between rotor 2 and intermediate piece 9, and by gaskets 10

between rotor 10 and connector 13.

TB175W

6

REV. 1

TB175W

8

REV. 1

REV. 1

9

TB175W

TROUBLESHOOTINTG

OVERALL MACHINE

NO OPERATIONS CAN BE DONE.

Inspect the hydraulic oil

Insufficient

Replenish the hydraulic

1

2

level.

oil.

Proper Amount

• Repair the pump or replace

Pump or coupling is

3

the pump.

faulty.

• Replace the coupling.

1. Inspect the hydraulic oil level.

“III. Machine Configuration, Hydraulic

Tank”

2. Replenish the hydraulic oil.

Take out the plug and replenish the hydraulic oil.

• The hydraulic oil supplied should be the same

brand as the oil currently in the tank.

“II. Specifications, Fluid Capacities”

3. Pump or coupling is faulty.

a. Disconnect the discharge hose from the pump

side.

Also fit a plug in the disconnected hose to keep

the hydraulic oil from pouring out.

b. With the engine emergency stop knob pulled

out all the way, turn the start switch to the

“START” position to cause the engine to begin

cranking. Check that the hydraulic oil is dis-

charged from the pump at this time.

If the pump is normal, hydraulic oil will be

discharged from it. If hydraulic oil is not dis-

charged, the pump or the coupling is faulty.

TB175W

V-4

OVERALL MACHINE

TROUBLESHOOTINTG

ALL OPERATIONS CAN BE DONE, BUT THERE IS NO POWER.

Inspect the hydraulic oil

Insufficient

Replenish the hydraulic

1

2

level.

oil.

Proper Amount

Noise generated by the

Noise

Replace the seal tape, O-rings,

3

Suction line is faulty.

pump.

hose.

No Noise

Bubbles from inside

Treat beginning at the source

the tank.

of the bubbling.

Faulty

Inspect the main relief

Repair or replace the main

4

valve.

relief valve.

Normal

• Repair or replace the pump.

5

Pump is faulty.

• Flush with hydraulic oil.

1. Inspect the hydraulic oil level.

2. Replenish the hydraulic oil.

“V-4”

3. Noise generated by the pump.

A faulty suction line can make it easy for cavita-

tion to occur in the pump and for noise to be

generated. Carry out the following inspect.

a. Inspect the piping used for suction of hydraulic

oil.

• Apply grease or oil to the part which appears

to be making the noise and inspect if there is

any change. (Inspect if it is sucking in air or

not.)

b. Inspect for clogging of the suction filter.

V-5

TB175W

OVERALL MACHINE

TROUBLESHOOTINTG

THE BOOM, BUCKET, SLEW AND ARM DO NOT MOVE AT ALL, OR THE SPEED IS LOW.

Inspect the hydraulic

Faulty

Repair or replace the hydrau-

1

pump P5.

lic pump P5.

Normal

Faulty

2

Inspect the fuse.

Replace the fuse.

Normal

Faulty

Adjust or replace the limit

3

Inspect the limit switch.

switch.

Normal

Inspect the lever lock so-

Faulty

Repair or replace the lever lock

4

lenoid valve.

solenoid valve.

Normal

Inspect the pilot relief

Faulty

Adjust, repair or replace the

5

valve.

pilot relief valve.

Normal

Faulty

Repair or replace the pilot

6

Inspect the pilot valve.

valve.

1. Inspect the hydraulic pump P5.

Inspect the hydraulic pump P5 which is the source

of the hydraulic pressure for the pilot valve.

“V-4”

Since clogging of the line filter can also be con-

sidered, inspect and clean the filter.

V-7

TB175W

TROUBLESHOOTINTG

OVERALL MACHINE

2. Inspect the fuse.

Inspect the fuse for the electric power circuit that

operates the pilot solenoid valve.

W2E003

3. Inspect the limit switch.

Set the lever stand to the operation position to turn

on the limit switch. Check the voltage at the lever

lock solenoid valve by using a tester.

• The limit switch is normal if the voltage is

being applied.

Reference: If the limit switch is found to be faulty

and the attachment must be moved, connect the

lever lock release connectors (male) and (female)

for emergency use.

4. Inspect the lever lock solenoid valve.

Inspect by the following procedure.

a. Turn the starter switch to the “ON” position.

b. Push lightly on the projection on the front end

of the solenoid valve.

c. Move the lever stand and change the limit

switch from “OFF” to “ON”.

d. If the spool moves and vibration can be felt

with the fingertip when the circuit changes,

then it is normal.

5. Inspect the pilot relief valve.

Measure the relief pressure of the pilot relief

valve.

• If the pressure is the standard value, the valve

is normal.

“II. Specifications, Standards for Judging

Performance”

6. Inspect the pilot valve.

“IV. Hydraulic Units, Pilot Valve”

TB175W

V-8

SLEWING

TROUBLESHOOTINTG

NO SLEWING CAN BE DONE.

Inspect the operation of

1

actuators other than the

slew motor.

Normal

Faulty

Repair or replace the pilot

2

Inspect the pilot valve.

valve.

Normal

Faulty

Repair or replace the shuttle

3

Inspect the shuttle valve.

valve.

Normal

Faulty

Inspect the operation of

Repair or replace the housing

4

the spool.

block.

Normal

Inspect the slew hydrau-

Pressure is low.

Adjust the slew relief

5

Adjust the set pressure.

lic pressure.

valve pressure.

Normal

Pressure does not rise

Repair or replace the slew re-

lief valve.

Faulty

Repair or replace the slew

6

Inspect the slew motor.

motor.

Normal

The slew bearing is faulty.

Replace.

1. Inspect the operation of actuators other than

the slew motor.

Inspect if the operation of the slew motor only is

Lever Operated

Places inspected

faulty by the table at right. If its operation is

Dozer Blade

Relief Valve R3

Pump P3

faulty, inspect the main relief valve and the hy-

draulic pump.

“V-6”

V-9

TB175W

TROUBLESHOOTINTG

SLEWING

2. Inspect the pilot valve.

Disconnect the hose between the pilot valve and

control valve (slew section) at the control valve

side, then set a pressure gauge in the disconnected

hose.

• A plug should be inserted in the control valve

port.

• Operate the lever (slew) and measure the pres-

sure.

• Depending on the operating angle, a pressure

in the 0~3.4 MPa range is normal.

3. Inspect the shuttle valve.

Disconnect the hose that goes between the shuttle

valve and the slew motor at the slew motor side

and set a pressure gauge to the disconnected hose.

• Operate the lever (slew) and measure the pres-

sure.

• The shuttle valve is normal if between 0 and

3.4 MPa corresponding to the operation angle.

4. Inspect the operation of the spool.

Disconnect the hose that goes between the control

valve (slew section) and the slew motor at the

valve side and set a pressure gauge to the dis-

charge port of the valve.

• Operate the lever (slew) and measure the pres-

sure.

• The operation of the spool is normal if it agrees

with the following value of supply pressure:

23.5 MPa

5. Inspect the slew hydraulic pressure.

Measure the pressure at the left and right slew

relief valves.

• The pressure is normal if it is the standard

value.

“II. Specifications, Standards for Judging

Performance”

If adjustment of the pressure is possible, the slew

relief valve’s adjustment is faulty. Also, if the

pressure adjustment is impossible, the slew relief

valve is faulty.

TB175W

V-10

SLEWING

TROUBLESHOOTINTG

6. Inspect the slew motor.

Separate the slew motor (1) and the turntable (2),

then try turning the turntable (2).

• Turntable doesn’t turn

Faulty slew bearing (3).

• Turntable turns

Faulty slew motor (1).

“IV. Hydraulic Units, Slew Motor”

V-11

TB175W

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