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5
.
B
R
E
A
K
D
O
W
5
.
B
R
E
A
K
D
O
W
This guide does not replace the logical equations described previously in this manual,
it makes it possible to the technician to have a logical step of breakdown service, detailing the
successive stages, while going from main one until the details.
The checking of the electric part is carried out in priority because less sensitive to the external
parameters than the hydraulics part (temperature, pollution, viscosity...).
The denomination of the movements describes below implies the 2 phases (ie BOOM UP/DOWN)
Note: Some options like ASB (Activ Shied Bar) if installed and activated will stop all movements from
upper controls only (except turntable rotation) , all movements from lower controls remain active , refer
to Haulotte services for more details
5
.
1
.
N
O
S
T
5
.
1
.
N
O
S
T
Battery (14V)
Emergency push buttons SB1-SB2
Start switchs SB3-SB4
Key switch SA1
Fuse FU8
Pressure Oil engine B3
Clogged air filter B1
Alternator light HL1
Relays KA2 –KP1-KMG
Alternator charge D+ =0
Drive joystick SM4 ( signal and/or neutral position)
Head module
5
.
2
.
N
O
M
O
5
.
2
.
N
O
M
O
Machine in overload and/or in slope
Fuses FU7 –FU10
LS Valve YV1
Foot dead man pedal SB6 / lower dead man switch SA19
Head module
5
.
3
.
N
O
M
O
5
.
3
.
N
O
M
O
Machine in slope (SQ1)
Machine in overload (SQ5/SQ6)
5
.
4
.
N
O
B
O
5
.
4
.
N
O
B
O
Signal on YV3 (25-50-75% Vbat)
Signal on SM31 joystick ( 0.5/2.5/4.5VDC)
Toggle switch SA13
Valve YV3
Head module
No pressure lift
TRAINING MANUAL DIAGNOSTIC Level 2
2420339100
N
S
E
R
V
I
C
E
G
U
N
S
E
R
V
I
C
E
G
U
A
R
T
A
R
T
V
E
M
E
N
T
V
E
M
E
N
T
V
E
M
E
N
T
>
3
M
V
E
M
E
N
T
>
3
M
O
M
L
I
F
T
O
M
L
I
F
T
I
D
E
I
D
E
H21TX - H23TPX and H25 TPX
66/78
E07-14
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