Komatsu GD755-5R User manual

MOTOR GRADER
Field Assembly Instruction
GEN00113-00
GD755
-5R
SERIAL NUMBERS
10001
and up

CONTENTS
0000 Introduction (1/2) to (2/2) 1
0010 Preparation - Removal of parts on floor side (1/9) to (9/9) 3
0020 Preparation - Removal of exterior parts under floor (1/3) to (3/3) 12
0030 Preparation - Removal of floor mounting bolts 15
0040 Preparation - Removal of parts on cab side 16
0050 Installation of cab (1/5) to (5/5) 17
0060 Connections with chassis (1/5) to (5/5) 22
0070 Restoration of parts around floor (1/3) to (3/3) 27
0080 Check of each operation (1/2) to (2/2) 31

Introduction
1: Park the machine on a flat ground, lower the blade to the ground, and then start the work.
2: When selecting the parking place, consider the size and weight of the machine.
3: A space about 6 m high is necessary for installation of the cab.
4: Before starting the work, read this manual through.
* To remove the cab, perform the procedure in this manual in the reverse order.
Workflow Items in this manual
1: Removal of parts on floor side
2: Removal of exterior parts on floor side
3: Removal of floor mounting bolts
4: Removal of parts on cab side
5: Installation of cab
6: Connections with chassis
7: Restoration of parts around floor
8: Check of each operation
9: End of work
Q't
y
Name Q't
y
Others
Precautions
1 × 2 ×
Tools to be used
Name
Introduction (1/2)
Facilities to be used
Assembly procedure
5 ×
NO.0000
3 × 4 × 6 ×
G
D755-5R Installation procedure o
f
operator's cab
Overall length: 9,580 mm
Overall width: 2,800 mm
Wei
g
ht: 21
,
700 k
g
To top of steering post: 2,690 mm
(
when
p
ost is at max. hei
g
ht
)
Cab height: 1,995 mm
Overall height: 3,515 mm
Cab weight: 860 kg
Installation
of cab
Removal
of cab
1

Scre
w
Q't
y
Name Q't
y
Others
Assembly procedure
5 ×
NO.0000
3 × 4 × 6 ×
If it is necessary to replace any nut or bolt, always use a Komatsu genuine part of
the same size as the
p
art that was re
p
laced
.
Tools to be used
Name
Introduction (2/2)
Facilities to be usedPrecautions
1 × 2 ×
M16 eyebolts 04530-11628 are necessary
for slinging (4 pcs.)
7.85 to 9.8 {0.8 to 1.0}
3.44 to 4.41 {0.35 to 0.45}
Nominal dia. a
6
8
Target value
3.9 {0.4}
8.8 ｛0.9｝
Allowable range Nm {kgm}
Nominal No.
Tightening
torque
16
54 to 88
{5.5 to 9.0}
2

1. Preparation on floor side
1) The machine is delivered under the following condition
2
)
Removal of floor ma
t
Q't
y
Name Q't
y
Others
Facilities to be used
Preparation - Removal of parts on floor side (1/9)
Assembly procedure
Tools to be used
5 ×
NO.0010
3 × 4 × 6 ×
Name
Precautions
1 × 2 ×
3

3
)
Removal of o
p
erator's sea
t
(1) Remove the four bolts and remove the operator's seat and its base together
.
01024-D1025 x4
Q't
y
Name Q't
y
Others
Name
Precautions
1 × 2 ×
5 ×
NO.0010
3 × 4 × 6 ×
Facilities to be used
Preparation - Removal of parts on floor side (2/9)
Assembly procedure
Tools to be used
Z
Z
Operator's seat
Weight: 35 kg
4

4) Removal of accessory case
01225-70616 x
4
23S-55-51970 x
4
5) Removal of KOMTRAX (if equipped)
(1) Remove the top cover of the KOMTRAX.
01024-81020 x
4
Q't
y
Name Q't
y
Others
Facilities to be used
Preparation - Removal of parts on floor side (3/9)
Assembly procedure
Tools to be used
5 ×
NO.0010
3 × 4 × 6 ×
Name
Precautions
1 × 2 ×
5

(2) Remove the left side cover.
01024-81020 x
2
01024-D1025 x2
01024-81020 x
2
Q't
y
Name Q't
y
Others
Precautions
1 × 2 ×
Facilities to be used
Preparation - Removal of parts on floor side (4/9)
(3) Disconnect the KOMTRAX connector (under the additional heater) a
s
shown below.
Assembly procedure
Tools to be used
Note) The engine does not star
t
while this connector is
disconnected.
5 ×
NO.0010
3 × 4 × 6 ×
Name
Disconnect
connector CN-KM1
6

(4) Remove the three bracket bolts of the KOMTRAX base.
01024-D1225 x2
01024-D1020 x1
01024-D1020 x2
Q't
y
Name Q't
y
Others
5 ×
NO.0010
3 × 4 × 6 ×
Tools to be used
Name
Facilities to be used
Preparation - Removal of parts on floor side (5/9)
(5) Remove the additional heater vent and plate together as shown at right below
,
and then remove the KOMTRAX unit, bracket, and wirin
g
harness to
g
ether
.
Assembly procedure
Precautions
1 × 2 ×
Z
Z
7