Curso Cat 950-962G Steering Syst STMG

Service Training MALAGA

950G/962G MEDIUM WHEEL LOADERS

STEERING SYSTEM

Francis March 1998

950G/962G MWL CHAPTER : STEERING SYSTEM

M E T S Y M M S S E E Y O M T T R T E S S A N T Y Y D O S S S N Y S T N O M L O I C M O L L A E I C P M S A

S T N E N O P M O C M E T S Y S G N I R E E T S

T I N U D G N N I A R H E T E M

R E Z I S L E V A L R T A V U E N

G N I R R E O T E O T S M Y D N R A A D P N M O U C P E S

K N A T C I L U A R D Y H E V L G A N I V R L E O E R T T S N O C

E V Y L R A A V D G N N O I C R E E S E T S

G N I P R M E U E P T S

R G N I E D R I E N E L T Y S C


COMPONENTS IDENTIFICATION

4

5

1. HMU. 2. Signal Hose 3. Signal Pressure Port 4 Brake Valve 5. Accelerator Pedal Cable

3

2

1


M E T S Y S D G L O N I H R E E T S

S G R N I E D R E N E I T L S Y C

R E Z I E L V A L R T A V U E N

G N I T D I R N N E A T U H E M

R E Z I E L V A L R T A V U E N

E V L A V K C E H C

Y R G A N I E D V R N E L O E A C T V E S S

L G N E I O R V R L E T N E A V T O C S

P M U P

R O Y T R G O A N M I D R D N E N O E A C T E S P S M K U N P A T


STEERING CONTROL VALVE

8

1

9

2 3

7 4 6 5

1. Steering Control Valve 2.Left Turn Hose 3.Back-Up Relief Valve 4.Return Hose 5.Supply Hose

6.Drain Hose 7.Pressure Port Line 8.Supply Hose 9.Right Turn Hose



E L K E B C V U E L O H A D C V

M E T S Y S C I L U A R D Y H G N I R E E T S

L T O E V O R T L L I N A P O V C

E L E T V T L U A H V S

G S R N I E R D E N I E L T Y S C L O E R V T L N A O V C

E K E L V B C L U E H O C A D V

T N Y E L M P E P L U P S M I T O M L I O P R F

P M U P G N I R E E T S

N E E R C S

K N A T


P F P U E E - I M K L V L U C E A P A R V B

L S L E V A L B A P V U K E C K E A H M C


S G R N E I D R E N I E T L Y S C

M E T S Y S C I L U A D R L O D H Y H G N I R E E T S

E G R N E I U C V S U L S D A E E V R R P

R E V O E S V S L O A V R C F E R I E L E D R N I L Y C

E V L E A L V B U K O C D E H C

L O O P S L O R T N O C

E V E L L A B V U K O C D E H C

L O R T E N V O L C A T V O L I P T M E N T E S M M Y O E S R L F P T O M L I I P

L O R T N E O V C L G A N I V R E E T S

E V L A V E L T T U H S

T O L I N R P U T M E O R R F

M T E N T S E T D Y M O O S L N T E I A L P E P K M A I R B

E K A R P B / M T U P O L I P

T N E M E L P M I O T

G N I P R M E U E T P S

T N E P M M E L U P P M I


STEERING PILOT CONTROL VALVE


STEERING PILOT CONTROL VALVE (Engine running)


STEERING PILOT COTROL VALVE (In process)


OUTPUT PRESSURE VS INPUT POSITION "ZERO" INPUT POSITION 1800 kPa 1600 kPa MINIMUM F F I E D R T U U S P S T E U R P O

550 +/10 kPa

0 kPa - 35 (CCW DEGREES)

2

+ -

1

0

2

+ -

1

35 (CW DEGREES)


E T F V I A R H D S

N O I T A R E P O R O F T F A O S E N N I G E N P E M O C D N A P M U P

D A P E K O Y

R O T A U T C A E G R A L

T U P T U O P M U P

E G A S S A P L A N G I S

E T A L P H S A W S

R G O N T I A R U P T S C S A A I L B L A D N M S A

) F R F O E O T T R A U U S C S N E S E R E P U R M S P S O E C R P ( R O ) T L A O S O N P E S P N M I O G C R A W ( O M L F

Y L B D M N E A S N S O A T L S I E P R R A B


N O I T A R E P Y O B D R N O A T T S A E S R U N S E S E P R P M W O O C L D N A P M U P

D A P E K O Y

E T A L P H S A W S

E T F V I A R H D S

R G O N T I A R U P T S C S A A I L B L A D N M S A


T U P T U O P M U P

E G A S S A P L A N G I S

Y L B D M N E A S N S O A T L S I E P R R A B



E T F V I A R H D S

N O I T A R E P O R O G T N A I K S O N R T E S P P U M O C D N A P M U P

D A P E K O Y R O T A U T C A E G R A L

E R U S S E R P D E C U D E R

T U P T U O P M U P

L A N G I S

E T A L P H S A W S

R G O N T I A R U P T S C S A A I L B L Y A D L N M B S A D M N E A S N S O A T L S I E P R R A B

) F R F O T E O T R A U U S C S N E S E R E P U R M S P S O E C R P ( R O ) T L A O S O N P E S P N M I O G C R A W ( O M L F


E T F V I A R H D S

N O I T A R E P O R O G T N A I S K O N R E T S P E D M O C D N A P M U P

D A P E K O Y

E T A L P H S A W S

Y L B D M N E A S N S O A T L S I E P R R A B R G O N T I A R U P T S C S A A I L B L A D N M S A


T U P T U O P M U P

L A N G I S



E T F V I A R H D S

N O I T A R E P O L L R A O T S T E A R S U S N S E E R P P M H G O I H C D N A P M U P

D A P E K O Y


E R T U U S P S T E U R O P . P X M A U M P T A

E R T U A S L S A E N R P G I . S X A M

E T A L P H S A W S

R G O N T I A R U P T S C S A A I L B L A D Y N L M S A B D M N E A S N S O A T L S I E P R R A B

) F R F O T E O T R A U U S C S N E S E R E P U R M S P S O E C R P ( R O ) T L A O S O N P E S P N M I O G C R A W ( O M L F


a P k 0 0 5 3 2

L S L E V A L B A P V U K E C K E A H M C

a P k 0 0 6 5 2

L O R T N E O V C L G A N V I R E E T S

E G R N E I U C V S U L S D A E E V R R P


S G R N E I D R E N I E T L Y S C

M E T S Y S C I L U N A R U R T D H G Y I R H G N I R E E T S

P F P U E - E I M K L V L U C E A P A R V B

R E V O E S V S L O A V R C F E R I E L E D R N I L Y C

a P k 0 7 0 2


m / m 1


E V L E L A V B U K O C D E H C

L O R T E N V O L C A T V O L I P M T E a N T E P M S k M Y O 0 E S R 5 L F T 4 P O 3 M L I I P

E V L A V E L T T U H S T O L N I R P U T M E O R R F

M E T D T N N S E A Y M S O T T E O L E L K P I A M I P R B

E K A R P B / M T U P O L I P

n i m / l 8 5 1

N R U T E R T N E M E L P M I


G n N i I P R m M / E l U E 7 T P 3 S

n i m / l 2 9 2 T N E P M M E L U P P M I

a a P P k k 8 2 3 1


S L E L V A L B A V P U K E C K E A H M C

a P k 0 0 6 5 2

F

L O R T N O E C V L G A N V I R E E T S

E G R N I E U V C S L U S A D E E V R R P


S G R N I E D R E N I E T L Y S C

M F E O T E N S I G Y N S E N C I R U L T U T F A E L R R D E Y E S H T L G A T N I N E R M E E L E P T P S S U

P F P U E - E I V M K L L U E C A P A R V B

a P k 0 0 5 3 2

R E V O E S V S L O A V R C F E R I L E E D R N I L Y C


a P k 0 7 0 2

m / m 1

a a P P k k 0 0 0 0 2 7 1


E V E L L A B V U K O C D E H C Y R n A i R D E m / N E l O T 2 S C E 3 S

L O R T E N V O L C A T V O L I P

M T E a N T P E S k M M Y 0 O E S 5 R F L T 4 P O 3 M I L I P

N R U T E R T N E M E L P M I

E V L A V E L T T U H S

T O N L I R P U T M E O R R F

M E T D T N N S E A M Y O T E S T L O E P I L K A M P I R B

E K A R P B / M U T P O L I P

n i m / l 8 5 1


G n i N I P m R M / l E U E 7 P T 3 S

n i m / l 2 9 2


a P k 0 0 5 6

a a P P k k 8 2 3 1


FAN DRIVE SYSTEM

2 3

1

4 5

1. 2. 3. 4. 5.

Fan Motor Intake Hose Hydraulic Fan Motor Fan Return Hose Drain Hose


R O N T A F O M

) m p r N A 5 F 8 3 1 (

M E T S Y N S O E E N V I I G R N D E N A F

T N C I E L M M E E U L A T P R S D Y M I Y S O H T

n i m / l 2 4

P U E E V L K A A V M

E V R L a E P L A V k O S 0 O S 5 4 C A L I P O Y B

R E L O O C L I O

a P k 0 7 1

R E T L I F

F E E I V L a L A P E V k R 0 0 0 7 1

K N A T

R P E M E T U P S


/ E P T K M O A L U I R P P B


R O N T A F O M

) m p N r A 5 F 8 3 1 (

M E T S Y F S F O E E V I I N R G N D E N A F

T N C I E L M M E E U L A T P R S D Y M I Y S O H T

P U E E V L K A A V M

E V R L E a L A V P O k S O S 0 C A 5 4 L I P O Y B

R E L O O C L I O

a P k 0 7 1

R E T L I F

n i m / l 2 4

F E E I V L L a E A P R V k 0 0 0 7 1

K N A T

P N M A F U P

R P E M E T U P S


/ E P T K M O A L U I R P P B


STEERING PRESSURE TEST PORT

FROM IMPLEMENT PILOT SYSTEM

PILOT SIGNAL PRESSURE TEST PORT

INPUT SHAFT

STEERING PILOT CONTROL VALVE PILOT SIGNAL PRESSURE ADJ

REDUCED PILOT SIGNAL PRESSURE TEST PORT

CONTROL SPOOL


STEERING SYSTEM MARGIN PRESSURE ADJUSTMENT

SIGNAL PRESSURE AP

1U5796 DIFFERENTIAL PRESSURE GROUP

FLOW COMPENSATOR (MARGIN SPOOL) MARGIN PRESSURE \ ADJUSTMENT SCREW

PRESSURE COMPENSATOR (PRESSURE CUTOFF)

PUMP OUTPUT PUMP OUTPUT PRESSURE TAP

1. Install the steering frame lock link so the machine machine can not turn. 2. Using the load sensing sensing signal pressure tap and the pump pump outlet pressure tap, install the Pressure Differential Gauge (1U5796). Connect a 60000 kPa pressure gauge in the differential pressure gauge, pump outlet side. 3. Loosen jam nut on on the crossover line relief valve, and turn adjuster adjuster screw three full turns counterclockwise. 4. Start the engine , allow the hydraulic oil to reach reach normal operating temperature. temperature. 5. While operating at the high high idle, turn slowly the steering steering wheel against the frame link lock until the pressure gauge installed on the pump outlet pressure tap shows 20000 kPa approximately. Then slowly unturn the t he steering wheel so that the pressure gradually decreases. 7. Between 20000 kPa kPa and 12000 kPa approximately, the Margin pressure should should remain constant at 2400 +/- 150 kPa 8. If the reading is not with with in specs, screw in or out the Margin pressure pressure adjustment screw.

Curso Cat 950-962G Steering Syst STMG

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