Terex Genie GTH-4017 EX User manual

English
Service Manual
GTH-4017 EX
GTH-4514 EX
Serial number range
From serial n.: 19296
From serial n.: 19286
GTH-4013 EX From serial n.: 19266
Part. No. 57.0009.0427
November 2008

Document 57.0009.0427
GTH-4017EX GTH-4514EX GTH-4013EX
ii
Intentionally blank page
Service Manual November 2008

November 2008 Introduction
Introduction
IMPORTANT
Read, understand and obey the safety rules and operating
instructions in the GTH-4013EX - GTH-4514EX - GTH-
4017EX Operator's manual (cod. 57.0009.0454) before
attempting any maintenance or repair procedure.
This manual provides the machine owner and user with
detailed information on the scheduled maintenance. It also
provided qualified service technicians with infromation on
troubleshooting and repair procedures.
Basic mechanical, hydraulic and electrical skills are
required to perform most procedures. However, several
procedures require specialized skills, as well as specific
tools and equipment.
In these instances, we strongly recommend letting service
and repair the machine at an authorized TEREXLIFT
service center.
Technical Publications
No part of this publication may be reproduced, stored in a
retrieval system or transmitted in any form or by any means
without prior written permission from TEREXLIFT srl.
In pursuing a policy of constant quality improvement,
TEREXLIFT srl reserves the right to make changes at any
time and without undertaking to give prior notice; therefore,
also this publication may be subject to modifications.
Contact us
http://www.terexlift.com
e-mail: [email protected]
http://www.genielift.com
© Copyright 2008 TEREXLIFT srl - All rights reserved
First Edition, First Printing, November 2008
For going to Table of Contents,
click on Genie symbol
Document 57.0009.0427 iii
GTH-4017EX GTH-4514EX GTH 4013EX

Machine Identification November 2008
CHASSIS SERIAL NUMBER
The chassis serial number is punched on the front left
part of the chassis side member.
IDENTIFICATION PLATES OF THE MAIN PARTS
The plates of the main components, not directly
manufactured by TEREXLIFT srl (for instance, engines,
pumps, etc.), are located where originally applied by the
manufacturers.
HOW TO READ
YOUR SERIAL
NUMBER
Chassis serial number
(The chassis serial number is punched on the front left
part of the chassis side member)
GTH-4017 P 07 19296
MODEL
ENGINE
TYPE
YEAR OF
MANUFACTURER
SERIAL
NUMBER
Lb
ona Industriale 0 0 Umbertide (PG) Italy
TRUC CAPACITY
UNLADEN TRUC MA IMUN EIG T
SERIAL NUMBER
MADE IN ITALY
MODEL NUMBER
YEAR OF MANUFACTURE
Lb
T IS TRUC IS COMPLIANT TO PART III OF ASME B . 2002 ERE APPLICABLE
MACHINE DATA PLATE
Machine Identification
Machine data plate
IDENTIFICATION MACHINE
Document 557.0009.0427
GTH-4017 GTH-4514 GTH-4013EX
iv

November 2008 Description
DESCRIPTION OF THE MACHINE OPERATION
GTH-4017 EX - GTH-4514 EX
The mechanical energy source of these machines is a
(1) Perkins diesel engine model 1104/d-44T, which
supplies a 74,5 kW at 2300 rev/min with a max torque
of 392 Nm at 1400 rev/min.
On the flywheel side of the engine, and connected to the
same by a Technodrive coupler complete with elastic joint
and with a 1-to-1 ratio, there is Sauer danfoss closedloop
pump for hydrostatic drives, model H1P078 (2). Max
displacement of this swashplate pump is 78 cm3/rev, and
the max calibration pressure is 450 bar. This pump is used
to supply hydraulic power under form of pressure and flow
rate which is then used for moving the machine. On the
through-shaft of such drive pump there is a Casappa open-
loop gear pump (with fixed displacement) (3) with priority
valve integrated in the housing. The displacement of this
pump is 43 cm3/rev. Its function is to provide hydraulic
power, under form of pressure and flow rate, to the steering
circuit of the machine (primary side) and to the circuit for
the telescopic boom movements (secondary side). The
assembly of the two pumps involves they have a rotation
velocity equal to the speed of the diesel engine. A third
Casappa open-loop gear pump (with fixed displacement)
(4) with a displacement of 20 cm3/rev., is installed on the
PTO of the engine located to the distribution side. This
pump feeds the servo-assisted braking system (25). The
suction lines of the open-loop pumps (3) and (4) are
protected by an immersed filter (8), placed inside the
hydraulic fluid tank (10) whose capacity is 150 litres. Just
upstream of the connection with the three suction lines
mentioned above, there is a gate valve with ball valve
(9) which lets you cut out the hydraulic oil tank in order
to perform maintenance interventions on the machine's
hydraulic system. The drive pump (2) is protected by a
special filter (34), placed on the external side of the tank
and protected by a gate (40).
The one-way valve (11) set at 2.5 bar protects the
pump housing against high pressures and guarantees a
certain circulation of the drain oil to the hydrostatic motor
reducing, in this way, the temperature. From port “M3” of
the drive pump (2) low-pressure oil is taken (25-30 bar)
and used for the anti-cavitation circuit of the automatic
fork levelling system. The hydraulic energy produced by
the drive pump (2) is converted into mechanical power by
a closed-loop hydrostatic motor, Sauer danfoos 51D110
model (5). The max displacement of this bent-axis motor
is 80 cm3/rev.
The motor is directly flanged to the Dana single-speed
reduction gear (26), which is fixed with brackets to the
central zone of the chassis. The mechanical torque at
the gearbox output is transmitted to the front axle (6)
and the rear axle (27), both model 212 manufactured by
Dana, through Cardan shafts. The hydraulic drive (12)
of “load sensing” type with a displacement of 315 cm3/
rev., receives oil from the priority line of the pump (3) in
relation to the “load sensing” signal sent by the hydraulic
drive and connected to such pump with function of pilot
signal. In this way, the input flow to the hydraulic drive
is exactly the one needed for the instantaneous steering
functions; any excess flow of the pump is available for
the functions of the telescopic boom. The steering circuit
is protected against input overpressures by a pressure
reducing valve set at 140 bar. On the two delivery lines
to the steering cylinders there are other two pressure
reducing valves with anti-shock function set at 200 bar.
These two valves are intended to limit possible shocks
on the steering wheel due to overstress on the steering
cylinders. The pressure reducing valves are installed in
the hydraulic drive (12) and cannot be regulated from
the outside. The steering circuit is completed by the
front steering cylinder (14), the rear steering cylinder
(15) (these cylinders being integral part of the front
axle (6) and the rear axle (27) respectively) and by a
4-way/3-position solenoid valve (13) for the selection of
the three different steer modes (rear wheels straight,
co-ordinate front/rear steering and independent front/
rear steering).
When the solenoid valve (13) is not energised, the
hydraulic drive supplies power to the front steering
cylinder; the rear steering cylinder is locked. When
one magnet or the other of the solenoid valve (13) is
energised, the chambers of the cylinders are connected
in a different manner thus causing the desired effect on
the steering mode. The Walvoil 4-section valve block of
mechanical type (16) receives oil from the secondary
line of the pump (3) and feeds all the movements of the
telescopic boom.
This valve consists of an input head with 3-way
pressure compensator used as a flow regulator for the
user which works at max load (load sensing), and as
a discharge valve when the pump flow is not used for
the boom movements, and of 4 modules each one of
them controlling a specific function of the telescopic
boom, that is lifting/lowering, attachment holding plate
Description
Document 57.0009.0427 v
GTH-4017EX GTH-4514EX GTH 4013EX

Description November 2008
rotation, boom extension/ retraction, attachment locking/
unlocking).
In the head there is a pressure relief valve set at 280
bar which, acting on the line of the “load sensing” signal,
limits the maximum pressure at the inlet of the main
valve through such 3-way compensator. On the main
inlet head of the main valve, there is also the pilot line
head which includes an inlet safety filter, a pressure
relief valve acting on the pilot line, and a safety solenoid
valve. The pilot head delivers oil at pressure to the 4
control modules of the main valves, such modules
operating the relevant main sliders in relation to the
command signal they receive from such joystick via the
control unit.
Module 1 of the main valve controls the telescopic
boom lifting cylinder (17). This cylinder has one single-
acting compensation valve (43) with safety function.
The control module of the second main valve element
is the electro-proportional type with electrical feed-back
and integrated electronics. The 0.5-lt. accumulator
prefilled at 50 bar (18) and located on the line of the
differential chamber of the lifting cylinder (17), allows
for damping the boom swings when the same boom is
moved down.
Module 2 of the main valve (16) controls the cylinder
operating the attachment holding plate of the telescopic
boom (19). This cylinder is equipped with a double-acting
compensation valve (41) with safety function. Paralleled
to this cylinder we find the fork levelling cylinder (20) (or
balancingcylinder)equippedwithaspecialdouble-acting
compensation valve (42). Inside this valve, the one-way
valves are installed in a reverse manner with respect
to the normal position to avoid the pressurisation of the
cylinder when the rotation command of the attachment
holding plate is operated. Again inside this valve, there
are other two one-way valves (44) set at 5 bar with
anti-cavitation function. These are used to deliver oil,
sucked from the low pressure line coming from the
drive pump (2), to the compensation circuit of the fork
levelling function, when such circuit cannot do it alone.
The control module of the second main valve element
is the electro-proportional type with electrical feed-back
and integrated electronics. On the two control lines of
the cylinder (19), and integral to module 2, there are two
pressure relief valves set at 290 bar which protect the
automatic levelling system of the forks when the boom
is moved up and down and in case of overload on the
attachment holding plate (ex. use of the bucket).
Module 3 of the main valve controls the boom telescope
extension cylinder (21). This cylinder is equipped with
a double-acting compensation valve (31) with safety
function. The control module main valve element is the
electro-proportional type with electrical feed-back and
integrated electronics.
On the control line of the circular chamber of the cylinder
(21) there is a pressure relief valve set at 200 bar which
limits the load when the boom is extended in those
working zones where the electronic overturning control
system cannot detect overload conditions with respect
to the load chart of the machine.
Module 4 of the main valve controls the attachment
locking cylinder (22). This cylinder has a double one-way
valve (45) with hydraulic release and safety function.
The control module of this main valve element is the
ON/OFF electrical type with integrated electronics. On
the feeding lines of this cylinder, there are two quick-fit
connectors (23) for the connection of the hydraulic lines
to the optional attachments which need hydraulic power
for their operation (ex. hydraulic winch and maintenance
jib, mixing bucket, etc.). The SAFIM S6 servo-assisted
braking system with pedal (25) receives oil from the
pump (4) and uses this oil to pressurise 3 hydraulic
accumulators (39) connected to the same system. The
oil at pressure contained in these accumulators is then
used to operate the service brake of the two axles (6)
and (27), and to unlock the parking brake in the front
axle (27).
The fill valve inside the braking system takes the flow
from the feeding line so the pressure on the line of the
accumulators reaches the calibration value of the cutout
valve set at 150 bar. When this pressure is reached,
the valve gradually releases all the flow to line B for
other uses. The oil feeds the ON/OFF type modular
main valve (28); the not used oil feeds the engine of the
radiator fan for cooling the hydraulic oil and the thermal
engine liquid.
The brake pedal located in the driving cab, which is an
integral part of the braking system S6, is connected to
a proportional slider which controls the two lines of the
service brake, one for each axle.
In relation to the stroke of this slider, a gradual
communication between the feeding line, connected
to two accumulators (39) which, at their turn, are
connected to ports R1 and R2 (the accumulators have
0.5-lt. capacity and 50bar fill pressure), and the service
brake lines is established so the flow is distributed to
such lines and the discharge line increasing, in this
way, the pressure (and as a result the braking force)
on the lines of the service brakes. When the sliders are
in the rest position, the lines of the service brakes are
connected to the discharge.
The pressure switch set at 70 bar and connected to port
F, sends an electrical warning signal when the pressure
inside the feeding circuit of the brake lines is too low to
guarantee the minimum braking efficiency.
The oil coming from the drain lines of the main control
valve of the telescopic boom (16) is cooled downb by
heat exchanger (32), which is divided in two sectors, i.e.
one absorbing heat from the cooling circuit of the diesel
engine and the other absorbing heat from the hydraulic
circuit of the machine. The oil cooled down by the heat
exchanger is drained into the tank (10).
DESCRIPTION
Document 57.0009.0427
GTH-4017EX GTH-4514EX GTH 4013EX
vi

November 2008 Description
A one-way valve calibrated at 8 bar (33), is installed
parallel to the input line of the heat exchanger and used
as safety valve. Its function is to avoid overpressure
conditions of the heat exchanger (as is the case of
a machine starting at low temperatures) by directly
draining any excess oil into the tank. The oscillation of
the rear axle of the machine is controlled by a block
cylinder (35) whose two chambers are equipped with
sealed 2-way/2-position solenoid valves. When the two
solenoid valves (46) are de-energised, the circular and
annular chambers of the cylinder are closed toward the
outside and the cylinder behaves like a strut/ tie-rod
blocking in this way the rear axle.
This happens when the inclination of the telescopic
boom exceeds a certain pre-set value of about 50° and
the side stability of the machine must be improved.
When, on the contrary, the boom inclination is below
such pre-set value, the two solenoids of the solenoid
valves are energised thus letting the oil circulating freely
from/to the two chambers of the cylinder. In this way,
the axle can oscillate, thus making the machine drive
more comfortable even in case of rough terrains.
The chambers of the cylinder are always kept filled with
oil by a single hydraulic line connected to the housing of
the drive pump (2).
This allows to have a minimum pressure capable of
keeping the circuit of the rear axle block cylinder full of
oil but incapable of producing overloads on the same
axle.
The ON/OFF type modular main valve (28) controls the
outriggers using the cylinders (24) (29) and controls the
levelling of the frame (30). In the input head of the main
valve there is a pressure relief valve set at 220 bar. The
oil flow that the main valve doesn't use, goes to the 20
cm gears hydraulic engine (7). The engine housing is
equipped with an anti-cavitation valve and a pressure
reducing valve set at 140 bar with by-pass function.
The outriggers and levelling cylinders are equipped
with a double-acting balancing valve (47) with safety
function.
When the machine is equipped with man-platform, a
battery-powered emergency pump (36) is installed to
be used in an emergency when the main circuit of the
telescopic boom is faulty.
To work correctly, this circuit uses one-way valves (37)
with different opening pressures.
DESCRIPTION
Document 57.0009.0427 vii
GTH-4017EX GTH-4514EX GTH 4013EX

Description November 2008
GTH-14017EX - GTH-4514EX hydraulic schematic
DESCRIPTION
M
N
R
F
P
B
N’
B
MA
LS
L
R
T
P
Diesel engine
Auxiliary gear pump
brakes stabilizers chassis levelling
displacement: 25 cc/rev
//
Suction filter
Suction screen
Anticavitation valve cracking pressure 5 bar
Check valve
cracking pressure:
2.5 bar
Check valve
cracking pressure:
0.5 bar (option)
Check valve
cracking pressure:
8 bar (option)
Check valve
cracking pressure:
0.5 bar (option)
Oil tank capacity 150 liters
Steering rotating actuator
displacement: 315 cc rev/
Front axle
Rear axle
Forks levelling
slave cylinder
Rear axle pivoting
lockout cylinder
Rear axle pivoting
lockout valve
2 ways/2 positions
Left stabilizer cylinder Right stabilizer cylinder
Chassis levelling cylinders
Boom telescoping cylinder
Boom lift cylinder
Forks tilt cylinder
Double overcenter safety valve piloting ratio: 4 1 cracking pressure: 350 bar
/
Double overcenter safety valve
piloting ratio: 4.2 1
cracking pressure: 350 bar
/
Double overcenter safety valve
piloting ratio: 4.2 1
cracking pressure: 350 bar
/
Double overcenter safety valve piloting ratio: 4.2 1 cracking pressure: 350 bar
/
Double overcenter safety valve piloting ratio: 7.6 1 cracking pressure: 350 bar
/
Double overcenter safety valve
piloting ratio: 1
cracking pressure: 350 bar
4/
Sing
4/
le overcenter safety valve
piloting ratio: 1 cracking pressure: 350 bar
Max relief valve
cracking
pressure
140 bar
Anti-shock
valves
cracking
pressure
200 bar
Quick coupling
hydraulic ports
Steering modes
selector valve
4 ways / 3 positions
Front axle
steering cylinder
Rear axle
steering cylinder
Tp1
Hydraulically piloted double check valve piloting ratio: 4 1/
P1 P1
R1
T1
T1’
T2’
T2
R2
P2 P2
T
A
P
B
Shutoff valve
Shutoff valve
capacity: 0.5 Litri precharge pressure 50 bar
capacity: 0.5 Litri precharge pressure 50 bar
capacity: 1.5 Litri precharge pressure 35 bar
Pressure
switch
activating
pressure
70 bar
Pressure
switch
activating
pressure
10 bar-20
Pressure
switch
activating
pressure
10 bar-20
Hydraulically powered
service emergency brakes
pedal pump
/
Boom functions hydraulic
circuit test port
TP
A
B
Mechanical gear speed
selector valve
4 ways/3 positions
Emergency electrical
motor driven pump set
3.2 cc/rev (option)
Mechanical gear speed
selector actuator
Boom functions pump
with integrated priority valve
displacement: 43 cc rev/
Mechanical gear (2 speeds)
E
200 bar
280 bar
1
0
2
E
1
0
2
1
0
2
E
290 bar
290 bar
1
0
2
T1
A
A
A
A
B
B
B
B
P
P
T
T
LS
Pp
Tp
Tp
FLT
Pp
RPM
G1
Ev13
MPR
A1
B1
B3
A3
B2
A2
T
P220 bar
1
1
10
0
0
2
2
2
140 bar
R
T
N
150 bar
30 bar
Parking brake handle selector valve
Forks attachment
quick coupling cylinder
Stabilizers/chassis levelling main valve
Boom up-down
Heat exchanger fan hydraulic motor displacement 20 cc rev
/
Heat exchanger
HYDRAULIC CIRCUIT
COLORS LEGENDA
Boom teering, brakes, stabilizers and chassis levelling functions lines
/ s
Low pressure and transmission charge pressure lines
Hydrostatic transmission high pressure lines
Hydrostatic transmission and boom functions valve piloting lines
Boom teering, brakes, stabilizers, chassis levelling pump pressure lines
/ s
Boom teering, auxiliary and transmission pumps suction lines
/ s
Tank lines
M
Ev3 Ev4
Ev5 Ev6
Ev14 Ev15
Ev7
Ev8
Ev9
Ev10
Ev11
Ev12
Pv1
Pv2
Pv3
Pv4
Hydrostatic transmission motor
max displacement: 80 cc rev/
XA XB
AM3 M4 M1
L1
L2
M2
X5
B
F00B F00A
MA
M3
L1
L3
L4
L2
S
M4
M14
M5
MB
Hydrostatic transmission pump
max displacement: 78 cc rev/
Hydrostatic transmission pump
displacement: cc rev
charge
17 /
X7 X8
24 bar
450 bar
450 bar
480 bar
480 bar
Tp3 Hydrostatic transmission
charge pressure test port
Forward Reverse
Check valve
cracking pressure:
8 bar
X3
Hydrostatic transmission high pressure test port
Tp2
38 39
25
6
27
23
22
19
35
17
18
12
14
13
15
20
21
28
16
32
36
3737
26
5
10
3
2
1
4
11
8
9
40
34
7
33
Fork tilt up-down
Boom telescoping in-out
Forks attachment
quick couplingt
Boom functions
main valve
45
30
47
47
29
24
47
47
30
31
44
42
41
46
46
43
Document 57.0009.0427
GTH-4017EX GTH-4514EX GTH 4013EX
viii

November 2008 Description
DESCRIPTION OF THE MACHINE OPERATION
GTH-4013EX
The mechanical energy source of these machines is a
(1) Perkins diesel engine model 1104/d-44T, which
supplies a 74,5 kW at 2200 rev/min with a max torque
of 392 Nm at 1400 rev/min.
On the flywheel side of the engine, and connected to the
same by a Technodrive coupler complete with elastic joint
and with a 1-to-1 ratio, there is Sauer danfoss closedloop
pump for hydrostatic drives, model H1P078 (2). Max
displacement of this swashplate pump is 78 cm3/rev, and
the max calibration pressure is 450 bar. This pump is used
to supply hydraulic power under form of pressure and flow
rate which is then used for moving the machine. On the
through-shaft of such drive pump there is a Casappa open-
loop gear pump (with fixed displacement) (3) with priority
valve integrated in the housing. The displacement of this
pump is 43 cm3/rev. Its function is to provide hydraulic
power, under form of pressure and flow rate, to the steering
circuit of the machine (primary side) and to the circuit for
the telescopic boom movements (secondary side). The
assembly of the two pumps involves they have a rotation
velocity equal to the speed of the diesel engine. A third
Casappa open-loop gear pump (with fixed displacement)
(4) with a displacement of 20 cm3/rev., is installed on the
PTO of the engine located to the distribution side. This
pump feeds the servo-assisted braking system (25). The
suction lines of the open-loop pumps (3) and (4) are
protected by an immersed filter (8), placed inside the
hydraulic fluid tank (10) whose capacity is 150 litres. Just
upstream of the connection with the three suction lines
mentioned above, there is a gate valve with ball valve
(9) which lets you cut out the hydraulic oil tank in order
to perform maintenance interventions on the machine's
hydraulic system. The drive pump (2) is protected by a
special filter (34), placed on the drine lines of the pumps
(3) (4). This filter cleans the oil. The drive pump sucks
the oil from the head filter set at 0,5bar.
The one-way valve (11) set at 2.5 bar protects the
pump housing against high pressures and guarantees a
certain circulation of the drain oil to the hydrostatic motor
reducing, in this way, the temperature. From port “M3” of
the drive pump (2) low-pressure oil is taken (25-30 bar)
and used for the anti-cavitation circuit of the automatic
fork levelling system. The hydraulic energy produced by
the drive pump (2) is converted into mechanical power by
a closed-loop hydrostatic motor, Sauer danfoos 51D080
model (5). The max displacement of this bent-axis motor
is 80 cm3/rev.
The motor is directly flanged to the Dana single-speed
reduction gear (26), which is fixed with brackets to the
central zone of the chassis. The mechanical torque at
the gearbox output is transmitted to the front axle (6)
and the rear axle (27), both model 212 manufactured by
Dana, through Cardan shafts. The hydraulic drive (12)
of “load sensing” type with a displacement of 315 cm3/
rev., receives oil from the priority line of the pump (3) in
relation to the “load sensing” signal sent by the hydraulic
drive and connected to such pump with function of pilot
signal. In this way, the input flow to the hydraulic drive
is exactly the one needed for the instantaneous steering
functions; any excess flow of the pump is available for
the functions of the telescopic boom. The steering circuit
is protected against input overpressures by a pressure
reducing valve set at 140 bar. On the two delivery lines
to the steering cylinders there are other two pressure
reducing valves with anti-shock function set at 200 bar.
These two valves are intended to limit possible shocks
on the steering wheel due to overstress on the steering
cylinders. The pressure reducing valves are installed in
the hydraulic drive (12) and cannot be regulated from
the outside. The steering circuit is completed by the
front steering cylinder (14), the rear steering cylinder
(15) (these cylinders being integral part of the front axle
(6) and the rear axle (27) respectively) and by a 4-way/3-
position solenoid valve (13) for the selection of the three
different steer modes (rear wheels straight, co-ordinate
front/rear steering and independent front/rear steering).
When the solenoid valve (13) is not energised, the
hydraulic drive feeds the front steering cylinder and the
rear cylinder is blocked.
When one magnet or the other of the solenoid valve (13) is
energised, the chambers of the cylinders are connected
in a different manner thus causing the desired effect on
the steering mode. The Walvoil 4-section valve block of
mechanical type (16) receives oil from the secondary
line of the pump (3) and feeds all the movements of the
telescopic boom.
This valve consists of an input head with 3-way
pressure compensator used as a flow regulator for the
user which works at max load (load sensing), and as
a discharge valve when the pump flow is not used for
the boom movements, and of 4 modules each one of
them controlling a specific function of the telescopic
boom, that is lifting/lowering, attachment holding plate
rotation, boom extension/ retraction, attachment locking/
unlocking).
Description
Document 57.0009.0427 ix
GTH-4017EX GTH-4514EX GTH 4013EX

Description November 2008
In the head there is a pressure relief valve set at 280
bar which, acting on the line of the “load sensing” signal,
limits the maximum pressure at the inlet of the main
valve through such 3-way compensator. On the main
inlet head of the main valve, there is also the pilot line
head which includes an inlet safety filter, a pressure
relief valve acting on the pilot line, and a safety solenoid
valve. The pilot head delivers oil at pressure to the 4
control modules of the main valves, such modules
operating the relevant main sliders in relation to the
command signal they receive from such joystick via the
control unit.
Module 1 of the main valve controls the telescopic
boom lifting cylinder (17). This cylinder has one single-
acting compensation valve (43) with safety function.
The control module of the second main valve element
is the electro-proportional type with electrical feed-back
and integrated electronics. The 0.5-lt. accumulator
prefilled at 50 bar (18) and located on the line of the
differential chamber of the lifting cylinder (17), allows
for damping the boom swings when the same boom is
moved down.
Module 2 of the main valve (16) controls the cylinder
operating the attachment holding plate of the telescopic
boom (19). This cylinder is equipped with a double-acting
compensation valve (41) with safety function. Paralleled
to this cylinder we find the fork levelling cylinder (20) (or
balancingcylinder)equippedwithaspecialdouble-acting
compensation valve (42). Inside this valve, the one-way
valves are installed in a reverse manner with respect
to the normal position to avoid the pressurisation of the
cylinder when the rotation command of the attachment
holding plate is operated. Again inside this valve, there
are other two one-way valves (44) set at 5 bar with
anti-cavitation function. These are used to deliver oil,
sucked from the low pressure line coming from the
drive pump (2), to the compensation circuit of the fork
levelling function, when such circuit cannot do it alone.
The control module of the second main valve element
is the electro-proportional type with electrical feed-back
and integrated electronics. On the two control lines of
the cylinder (19), and integral to module 2, there are two
pressure relief valves set at 290 bar which protect the
automatic levelling system of the forks when the boom
is moved up and down and in case of overload on the
attachment holding plate (ex. use of the bucket).
Module 3 of the main valve controls the boom telescope
extension cylinder (21). This cylinder is equipped with
a double-acting compensation valve (31) with safety
function; the module 3 controls the third section boom
extension cylinder (40) too. This cylinder is equipped
with a single-acting balancing valve (48) with safety
function.
The control module main valve element is the electro-
proportional type with electrical feed-back and integrated
electronics.
On the control line of the circular chamber of the cylinders
(21) and (40) there is a pressure relief valve set at 230
bar which limits the load when the boom is extended in
those working zones where the electronic overturning
control system cannot detect overload conditions with
respect to the load chart of the machine.
Module 4 of the main valve controls the attachment
locking cylinder (22). This cylinder has a double one-way
valve (45) with hydraulic release and safety function.
The control module of this main valve element is the
ON/OFF electrical type with integrated electronics. On
the feeding lines of this cylinder, there are two quick-fit
connectors (23) for the connection of the hydraulic lines
to the optional attachments which need hydraulic power
for their operation (ex. hydraulic winch and maintenance
jib, mixing bucket, etc.). The SAFIM S6 servo-assisted
braking system with pedal (25) receives oil from the
pump (4) and uses this oil to pressurise 2 hydraulic
accumulators (39) connected to the same system. The
oil at pressure contained in these accumulators is then
used to operate the service brake of the two axles (6)
and (27).
The fill valve inside the braking system takes the flow
from the feeding line so the pressure on the line of the
accumulators reaches the calibration value of the cutout
valve set at 150 bar. When this pressure is reached, the
valve gradually releases all the flow to line B for other
uses. The oil feeds the ON/OFF type modular main
valve (28).
The brake pedal located in the driving cab, which is an
integral part of the braking system S6, is connected to
a proportional slider which controls the two lines of the
service brake, one for each axle.
In relation to the stroke of this slider, a gradual
communication between the feeding line, connected
to two accumulators (39) which, at their turn, are
connected to ports R1 and R2 (the accumulators have
0.5-lt. capacity and 50bar fill pressure), and the service
brake lines is established so the flow is distributed to
such lines and the discharge line increasing, in this
way, the pressure (and as a result the braking force)
on the lines of the service brakes. When the sliders are
in the rest position, the lines of the service brakes are
connected to the discharge.
The pressure switch (38) set at 70 bar and connected
to port F, sends an electrical warning signal when the
pressure inside the feeding circuit of the brake lines is
too low to guarantee the minimum braking efficiency.
The oil coming from the drain lines of the main control
valve (16) of the telescopic boom is cooled down by
heat exchanger (32), which is divided in two sectors, i.e.
one absorbing heat from the cooling circuit of the diesel
engine and the other absorbing heat from the hydraulic
circuit of the machine. The oil cooled down by the heat
exchanger is drained into the tank (10).
A one-way valve calibrated at 8 bar (33), is installed
DESCRIPTION
Document 57.0009.0427
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November 2008 Description
parallel to the input line of the heat exchanger and used
as safety valve. Its function is to avoid overpressure
conditions of the heat exchanger (as is the case of
a machine starting at low temperatures) by directly
draining any excess oil into the tank. The oscillation of
the rear axle of the machine is controlled by a block
cylinder (35) whose two chambers are equipped with
sealed 2-way/2-position solenoid valves. When the two
solenoid valves (46) are de-energised, the circular and
annular chambers of the cylinder are closed toward the
outside and the cylinder behaves like a strut/ tie-rod
blocking in this way the rear axle.
This happens when the inclination of the telescopic
boom exceeds a certain pre-set value of about 50° and
the side stability of the machine must be improved.
When, on the contrary, the boom inclination is below
such pre-set value, the two solenoids of the solenoid
valves are energised thus letting the oil circulating freely
from/to the two chambers of the cylinder. In this way,
the axle can oscillate, thus making the machine drive
more comfortable even in case of rough terrains.
The chambers of the cylinder are always kept filled with
oil by a single hydraulic line connected to the housing of
the drive pump (2).
This allows to have a minimum pressure capable of
keeping the circuit of the rear axle block cylinder full of
oil but incapable of producing overloads on the same
axle.
The ON/OFF type modular main valve (28) controls the
outriggers using the cylinders (24) (29) and controls the
levelling of the frame (30). In the input head of the main
valve there is a pressure relief valve set at 220 bar.
The outriggers and levelling cylinders are equipped
with a double-acting balancing valve (47) with safety
function.
When the machine is equipped with man-platform, a
battery-powered emergency pump (36) is installed to
be used in an emergency when the main circuit of the
telescopic boom is faulty.
To work correctly, this circuit uses one-way valves (37)
with different opening pressures.
DESCRIPTION
Document 57.0009.0427 xi
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Description November 2008
GTH-4013EX hydraulic schematic
DESCRIPTION
M
N
R
F
P
B
N’
LS
L
R
T
P
Diesel engine
Auxiliary gear pump
displacement: 20 cc/rev
Suction screen
Anticavitation valve cracking pressure 5 bar
Check valve
cracking pressure:
2.5 bar
Check valve
cracking pressure:
0.5 bar (option)
Check valve
cracking pressure:
8 bar (option)
Check valve
cracking pressure:
0.5 bar (option)
Oil tank capacity 150 liters
Steering rotating actuator
displacement: 315 cc rev/
Front axle
Rear axle
Forks levelling
slave cylinder
Left stabilizer cylinder Right stabilizer cylinder
Chassis levelling cylinders
Second section boom
telescoping cylinder
Third section boom
telescoping cylinder
Boom lift cylinder
Forks tilt cylinder
Double overcenter safety valve piloting ratio: 4 1 cracking pressure: 350 bar
/
Double overcenter safety valve
piloting ratio: 4.2 1
cracking pressure: 350 bar
/
Double overcenter safety valve
piloting ratio: 4.2 1
cracking pressure: 350 bar
/Double overcenter safety valve
piloting ratio: 4.2 1 cracking pressure: 350 bar
/
Double overcenter safety valve piloting ratio: 7.6 1 cracking pressure: 350 bar
/
Double overcenter safety valve piloting ratio: 4/1 cracking pressure: 350 bar
Sing
4/
le overcenter safety valve
piloting ratio: 1 cracking pressure: 350 bar
Sing
4/
le overcenter safety valve
piloting ratio: 1 cracking pressure: 350 bar
Max relief valve
cracking
pressure
140 bar
Anti-shock
valves
cracking
pressure
200 bar
Quick coupling
hydraulic ports
Steering modes
selector valve
4 ways / 3 positions
Front axle
steering cylinder
Rear axle
steering cylinder
Tp1
Hydraulically piloted double check valve piloting ratio: 4 1/
R1
T1
T1’
T2’
T2
R2
T
A
P
B
capacity: 0.5 Litri precharge pressure 50 bar
capacity: 0.5 Litri precharge pressure 35 bar
Pressure
switch
activating
pressure
70 bar
Hydraulically powered
service/emergency brakes
pedal pump
Boom functions hydraulic
circuit test port
Hydrostatic transmission motor
max displacement: 80 cc rev/
TP
A
B
Mechanical gear speed
selector valve
4 ways/3 positions
Emergency electrical
motor driven pump set
3.2 cc/rev (option)
Mechanical gear speed
selector actuator
Mechanical gear (2 speeds)
E
230 bar
280 bar
1
0
2
E
1
0
2
1
0
2
E
290 bar
290 bar
1
0
2
T1
A
A
A
A
B
B
B
B
P
P
T
T
LS
Pp
Tp
Tp
FLT
Pp
RPM
G1 MPR
A1
B1
B3
A3
B2
A2
T
P200 bar
1
1
10
0
0
2
2
2
150 bar
Forks attachment
quick coupling cylinder
Stabilizers/chassis levelling main valve
Boom functions
main valve
HYDRAULIC CIRCUIT
COLORS LEGENDA
Actuators functions lines
Low pressure lines
Hydrostatic transmission high pressure lines
Hydraulic piloting lines
Open circuits pressure lines
Suction lines
Tank lines
M
Pv1
Pv2
Pv3
Pv4
Return filter with suction line pressurized at 0,5 bar
Check valve cracking pressure: 8 bar
Auxiliaries functions hydraulic circuit test port
Tp4
Shutoff valve
Rear axle pivoting
lockout cylinder
Rear axle pivoting
lockout valve
2 ways/2 positions
F00B F00A
MA
M3
L1
L3
L4
L2
A
B
S
M4
M14
M5
MB
Boom functions pump
with integrated priority valve
displacement: 43 cc/rev
Hydrostatic transmission pump
max displacement: 78 cc rev/
Hydrostatic transmission pump
displacement: cc rev
charge
17 /
XA XB
AM3 M4 M1
L1
L2
M2
X39
X14
X8
X4
X5
X6 X7
X19
X20
X22
X21
X23
X24
X7
X30 X31
X18
X17
X19
X8
X33X34
X3
B
24 bar
450 bar
450 bar
480 bar
480 bar
Heat exchanger
Return filter
with suction line
pressurized at 0,5 bar
Tp2
Hydrostatic transmission
high pressure test port
Tp3
Hydrostatic transmission charge pressure test port
38 39
25
6
27
23
22
19
35
17
18
12
14
13
15
20
21
28
16
32
36
37
26
5
10
3
2
1
4
11
8
9
33
45
47
47
29
24
47
30
31
44
42
41
46
46
43
48
40
34
Document 57.0009.0427
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November 2008 Section 1 - Safety Rules
Document 57.0009.0427 xiii
GTH-4017EX GTH-4514EX GTH-4013EX
Safety Rules
Danger
Failure to obey the instructions and safety rules in this
manual and the appropriate Operator's Manual on your
machine will result in death or serious injury.
Many of the hazards identified in the Operator's Manual
are also safety hazards when maintenace and repair
procedures are performed..
Do Not Perform Maintenace Unless:
You are trained and qualified to perform maintenace
on this machine.
You read, understand and obey:
- manufacturer's instructions and safety rules
- employer's safety rules and worksite regulations
- applicable governmental regulations
You have the appropriate tools, lifting equipment and
a suitable workshop.

Section 1 - Safety Rules November 2008
Document 57.0009.0427
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xiv
SAFETY RULES
1.1 SAFETY RULES
1.1-1 PERSONAL SAFETY
In this manual, any important information is preceded by
a SPECIAL SYMBOL.
All operators who work or service the machine must know
the exact meaning of these safety symbols.
There are six special (or safety) symbols in this manual,
always combined with keywords that class the situations
according to their danger degree.
The symbols are always followed by a text explaining
the situation taken into account, the attention to be paid
to such situation, the method and the behaviour to be
adopted. When necessary, it stresses prohibitions or
supplies instructions to prevent dangers.
Sometimes, it can be followed by illustrations.
We list below the special (or safety) symbols according
to the relative seriousness of the hazard situation:
Draws the attention to situations that involve your
own as well as the others’ safety and that can result
in serious or lethal injury.
DANGER
Draws the attention to situations that involve your
own as well as the others’ safety and that can result
in serious or lethal injury.
WARNING
Draws the attention either to situations that involve
your own as well as the others’ safety and that can
result in minor or moderate injury or to situations
that involve the machine efficiency.
CAUTION
Draws the attention either to situations that involve
your own as well as the others’ safety and that can
result in minor or moderate injury or to situations
that involve the machine efficiency.
NOTICE
Draws the attention to important technical information
or practical advice that allows for a safer and more
efficient use of the machine.
PROTECT THE
ENVIRONMENT
Draws the attention to important environment-related
information.
Be sure to wear protective eye wear and
other protective clothing if the situation
warrants it.
Be aware of potential crushing hazards such
as moving parts, free swinging or unsecured
components when lifting or placing loads.
Always wear approved steel-toed shoes.

November 2008 Section 1 - Safety Rules
Document 57.0009.0427 xv
GTH-4017EX GTH-4514EX GTH-4013EX
SAFETY RULES
1.1-2 WORKPLACE SAFETY
Be sure to keep sparks, flames and
lighted tobacco away from flammable and
combustible materials like battery gases
and engine fuels. Always have an approved
fire extinguisher within easy reach.
Be sure that all tools and working areas are
properly maintained and ready for use.
Keep work surfaces clean and free of debris
that could get into machine components and
cause damage.
Be sure that your workshop or work area is
properly ventilated and well lit.
Be sure any forklift, overhead crane or other
lifting or supporting device is fully capable of
supporting and stabilizing the weight to be
lifted. Use only chains or straps that are in
good condition and of ample capacity.
Be sure that fasteners intended for one time
use (i.e., cotter pins and self-locking nuts)
are not reused. These components may fail
if they are used a second time.
Be sure to properly dispose of old oil or other
fluids. Use an approved container. Please
be environmentally safe.

Section 1 - Safety Rules November 2008
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xvi
SAFETY RULES
1.2 GENERAL REMARKS
Most accidents occurring while working, servicing or
maintaining operation machines, are caused by not
complying with the basic safety precautions. Therefore,
it is necessary to pay steady attention to the potential
hazards and the effects that may come of operations
carried out on the machine
CAUTION
If you recognise hazardous situations, you can
prevent accidents!
For instance, this handbook makes use of special safety
symbols to highlight potentially hazardous situations.
NOTICE
The instructions given in this handbook are the ones
established by GENIE. They do not exclude other
safe and most convenient ways for the machine
commissioning, operation and maintenance that take
into account the available spaces and means.
If you decide to follow instructions other than those given
in this manual, you must:
• be sure that the operations you are going to carry
out are not explicitly forbidden;
• be sure that the methods are safe and in compliance
with the indications given in this section;
• be sure that the methods cannot damage the machine
directly or indirectly or make it unsafe;
• contact GENIE Assistance Service for any suggestion
and the necessary written permission.
CAUTION
Do not hesitate to pose questions if you are in
doubt! Contact GENIE: the assistance service is at
your disposal. Addresses, phone and fax numbers
are given in the cover and in the title-page of this
manual.
1.3 SERVICEMEN'S REQUISITES
The operators who use the machine regularly or
occasionally (e.g. for maintenance or transport) shall
have the following requisites:
health:
before and during any operation, operators shall never
take alcoholic beverages, medicines or other substances
that may alter their psycho-physical conditions and,
consequently, their working abilities.
physical:
good eyesight, acute hearing, good co-ordination and
ability to carry out all required operations in a safe way,
according to the instructions of this manual.
mental:
ability to understand and apply the rules, regulations and
safety precautions. They shall be careful and sensible
for their own as well as for the others’ safety and shall
desire to carry out the work correctly and in a responsible
way.
emotional:
they shall keep calm and always be able to evaluate their
own physical and mental conditions.
training:
they shall read and familiarise with this handbook, its
enclosed graphs and diagrams, the identification and
hazard warning plates. They shall be skilled and trained
about the machine use.
CAUTION
It is recommended to take part in at least one technical
training course organised by GENIE Assistance
Office.
CAUTION
Ordinary and extraordinary maintenance of the
machineare quite complex from a technical point
of view and should be performed by an authoirsed
service centre.

November 2008 Section 1 - Safety Rules
Document 57.0009.0427 xvii
GTH-4017EX GTH-4514EX GTH-4013EX
SAFETY RULES
1.3-1 PERSONAL PROTECTIVE EQUIPMENT
During work, but especially when maintaining or repairing
the machine, operators must wear suitable protective
clothing and equipment:
• Overalls or any other comfortable garments.
Operators should wear neither clothes with large
sleeves nor objects that can get stuck in moving parts
of the machine
• Protective helmet when working under or in the
vicinity of suspended load
• Protective gloves
• Working shoes
• Breathing set (or dust mask)
• Ear-protectors or equivalent equipment
• Goggles or facial screen.
CAUTION
Use only type-approved protective equipment in
good condition.
1.4 GENERAL SAFETY PRECAUTIONS
DANGER
Read and understand the following safety instructions
before servicing the machine.
The following list contains safety rules which must
absolutely be obeyed to prevent accidents and
injuries.
1.4-1 WORKING AREA
• Make sure the area all around the machine is safe.
Always be aware of potential risks.
• During work, keep the working area in order. Never
leave objects scattered: they could hinder the
machine movements and represent a danger for
personnel.
1.4-2 PRECAUTIONS DURING WORK
• Do not walk or stop under raised loads or machine
parts supported by hydraulic cylinders or ropes
only.
• Keep the machine handholds and access steps
always clean from oil, grease or dirt to prevent falls
or slips.
• When entering/leaving the cab or other raised parts,
always face the machine; never turn the back.
• When carrying out operations at hazardous
heights (over 3 meters from the ground), always
use typeapproved safety belts or fall preventing
devices.
• Do not enter/leave the machine when it is running.
• Before servicing the engine, let its parts cool down.
• Do not leave the driving place when the machine is
running.
• Neither stop nor carry out interventions under or
between the machine wheels when engine is running.
When maintenance in this area is needed, stop the
engine, engage the parking brake and chock the
wheels to prevent accidental movements.
• Do not carry out maintenance or repair works without
a sufficient lighting.
• When using the machine lights, the beam should be
oriented in order not to blind the personnel at work.
• Before applying voltage to electric cables or
components, ensure they are properly connected
and efficient.
• Do not carry out interventions on electric components
with voltage over 48V.

Section 1 - Safety Rules November 2008
Document 57.0009.0427
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xviii
SAFETY RULES
• Do not connect wet plugs or sockets.
• Signs and stickers shall never be removed, hidden
or become unreadable.
• Except for maintenance purposes, do not remove
safety devices, covers, guards,. Should their removal
be necessary, stop the engine, remove them with
the greatest care and always remember to refit them
before starting the engine and using the machine
again.
• Always stop the engine and disconnect the batteries
before maintenance or service.
• Do not lubricate, clean or adjust moving parts.
• Do not carry out operations manually when specific
tools are provided for this purpose.
• Absolutely avoid to use tools in bad conditions or in
an improper way.
• Before carrying out operations on hydraulic lines
under pressure (hydraulic oil, compressed air) and/or
before disconnecting hydraulic components, ensure
the relevant line has been previously depressurised
and does not contain any hot fluid.
DANGER
Any intervention on the hydraulic or pneumatic circuit
must be carried out by authorised personnel.
Before any operation on lines under pressure, release
any residual pressure from the circuit.
Do not use your fingers to check for pressure leaks.
Fine jets of air, oil or fuel can injure you.
• Neither smoke nor use open flames if there is a risk
of fire or close to fuel, oil or batteries.
• Do not leave fuel cans or bottles in unsuitable
places.
• Do not empty catalytic mufflers or other vessels
containing burning materials without taking the
necessary precautions.
• Carefully handle all flammable or dangerous
substances.
• After any maintenance or repair work, make sure
that no tool, cloth or other object has been left within
compartments with moving parts or in which suction
and cooling air circulates.
• Never give orders to several people at a time.
Instructions and signs must be given by one person
only.
• Always pay the due attention to the instructions given
by the foreman.
• Never distract the operator during working phases
or crucial manoeuvres.
• Do not call an operator suddenly, if unnecessary.
• Do not frighten an operator or throw objects by no
means.
• After work, never leave the machine under potentially
dangerous conditions.
PROTECT THE
ENVIRONMENT
Treatment and disposal of used oils is subject to
federal, national and local laws and regulations.
Collect and deliver these wastes to authorised
centres.
• Use the assistance of a second person to handle
loads weighing 30 to 50 kg.
• For loads over 50 kg, the use of special hoisting
equipment in good condition and equipped as per
enforced regulations is mandatory.

November 2008
Document 57.0009.0427 xix
GTH-4017EX GTH-4514EX GTH-4013EX
Table of Contents
Rev. Introduction iii
Important iii
Machine Identification iv
Description v
Description of the machine operation GTH-4017EX - GTH-4514EX v
Hydraulic schematic GTH-4017EX - GTH-4514EX viii
Description of the machine operation GTH-4013EX ix
Hydraulic schematic GTH-4013EX xii
Section 1 Rev. Safety Rules Xiii
1.1 Safety rules xiv
1.1-1 Personal safety xiv
1.1-2 Workplace safety xv
1.2 General remarks xvi
1.3 Servicemen's requisites xvi
1.3-1 Personal protective equipment xvii
1.4 General safety precautions xvii
1.4-1 Working area xvii
1.4-2 Precautions during work xvii
Section 2 Rev. Technical Specification 1
2.1 Main dimensions 1
2.2 Tyres 2
2.3 Limit of use 2
2.4 Weight 2
2.5 Speed 2
2.6 Payload and reach 2
2.7 Forks (floating type) 3
2.8 Diesel engine 3
2.9 Hydraulic system 3
2.10 Electrical system 3
2.11 Machine sounds level 4
2.12 Vibration level 4
2.13 Refuelling 4
2.14 Fastener torques 5
2.15 Locking material 6
2.16 Hoisting instructions 7
2.17 Advice to renew flexible hoses 8
2.18 List of recommended spare parts GTH-4013EX 9
List of recommended spare parts GTH-4017EX - GTH-4514EX 11
2.19 Machine paint colour 13
2.20 Checking the cylinder movement times 14
2.21 Hydraulic settings 16
1. Preliminary operations 16
2. Calibrating the boom main valve 16
3. Check calibrating hydrostatic transmission 16
3.1 Hydrostatic transmission pump 17
3.2 Check transmission piloting 17
4. Calibrating the power steering 17
2.22 DLE system 24
2.23 Hydrostatic transmission control unit check system 35

November 2008
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TABLE OF CONTENTS
Section 3 Rev. Maintenance Inspections 1
3.1 Introduction 1
3.2 About this section 2
3.3 Maintenance table 3
3.4 Maintenance inspection report 6
Section 4 Rev. Maintenance Procedures 1
4.1 Introduction 1
4.2 About this section 2
4.3 Table A procedures 3
A-1 Check the oil level within reduction gears, differential gears
and power divider reduction gears 3
A-2 Check the tightening of the wheel bolts 5
A-3 Check the tightening of all bolts and nuts 6
A-4 Check the couplings for oil leaks 6
A-5 Inspect the Operator's Manual 7
A-6 Inspect the decals and plates 7
A-7 Check the engine oil level 8
A-8 Clean the air suction filter (GTH-4013EX) 9
Clean the air suction filter (GTH-4017EX - GTH-4514EX) 10
A-9 Check and clean the radiator 11
A-10 Check the hydraulic oil level in the tank 12
A-11 Check the greasing of the boom section pads
(GTH-4013EX - GTH-4514EX) 13
Check the greasing of the boom section pads (GTH-4017EX) 14
A-12 Grease the forks 15
A-13 Grease all joints of the boom, the rear axle shaft joint,
the transmission shafts, the front and rear axles
and any equipment of the machine 16
A-14 Check the efficency of the lighting electric system 17
A-15 Check the efficency of braking system 18
A-16 Check the efficency of the steering selection system 19
A-17 Check the efficency of the fork balancing system 20
A-18 Check the efficient working order of the safety devices 21
A-19 Check the engine coolant level 24
A-20 Check the efficency of the overload warning system 25
A-21 Check the re-sequence of the boom telescope (GTH-4013EX) 26
4.4 Table B procedures 27
B-1 Check the efficency of the machine 27
B-2 Check the tension of the alternator belt 27
B-3 Check the tyre inflation 28
B-4 Check the tightening of the wheel nuts 29
B-5 Check the tightening of the cardan shaft screws 30
B-6 Clean the radiator fins 31
4.5 Table C procedures 32
C-1 Change the oil in the reduction gears, differential gears
and power divider reduction gear 32
C-2 Change the engine oil and relevant filter 33
C-3 Check the oil level in the front and rear differential gears 34
C-4 Check the oil level in the four wheel reduction gears 34
C-5 Check and clean the engine air filter (GTH-4013EX) 35
Check and clean the engine air filter (GTH-4017EX - GTH-4514EX) 36
C-6 Check the clamping of the cableheads to the battery terminals 37
C-7 Check the air suction hose between engine and filter 37
C-8 Check the cylinder chromium-plated rods 38