
PARTS CATALOG
MINI EXCAVATOR
SERIAL No. WPOOOOOl -
IHI
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IHI Construction Machinery Limited
PUB.No.2

PREFACE
This parts catalog comprehensively lists all the structural parts for all pieces of
equipment and thus may be regarded as a master catalog. Included are a description of
parts that have been altered to adapt to improvements in equipment, and their
suitabillty for designated pieces of equipment and interchangeability, The informa-
tion is provided for both parts sales and servicing use. your opinions and comments on
errors in this catalog will be greatefully received. They will be included in
subsequent revised versions.
Composition of the master catalog
The master catalog consists of the front cover(binder), inside title page, notice of
revisions, preface, index, table of contents, main text, index of parts numbers in
sequential order, and colophon.
STORAGE OF THE MASTER CATALOG
Storage
A record of the master catalog in your possession is rept in our master distribution
file. Therefore, you will be notified of all future additions, revisions and
discontinuations. Thus, we suggest you appoint someone to be in charge of your
master catalog this person will be notified of revisions (revised versions); by
adding, replacing, and making revisions he will be able always to maintain an
accurate master catalog.
Notice of Revisions
A notice of revisions is printed on the inside cover. All pages are listed. Whenever
revisions are distributed, we suggest that you replace the old inner list of pages
with the new one to ensure that filling is properly maintained.
Maintrining the master catalog
First verify the model printed at the bottom left of each sheet.
The page number is printed at the bottom center (under the name for each sheet).
Use this number for filing purposes.
Pages that have been added are indicated by hyphenated numbers following the
applicable page number.
(Example)
Added pages d
Revised numbers
When contents are revised and replacement sheets are provided, in order to
distinguish new from old, each sheet has a revision number (Rev. No.) printed and
encircled at the lower right. Discard the sheet with the old number, and replace it
with the new sheet.
NOTE: Since pages are printed on both sides of each sheet, if one side has been
revised, and the other has not, the unrevised page will have an unchanged
revision number.

HOW TO USE THE MASTER PARTS CATALOG
Parts diagrams
Whenever improvements in machinery call for changes to a diagram, both the new and
the old diagrams are shown.
Description Heading
JAPANESE N M E
ENGLlSH N M E
SHEET No. 6-2A I
I
(61
(1) Model
The machinery model number is indicated. When making replacements, verify the
model type.
(2) Index number
The index number shown at the right of the index is recorded.
(3) Revision number (Rev. No. )
The revision number applies to each page, and indicates the number of revisions.
Use this to confirm that the new sheet is a replacement for the old one.
(4) Sheet number (Sheet. No. )
Sheet numbers are as indicated in the table of contents. Numbers are explained
below.
Main n u m b e r d I I I ~ y p e indicator
Sub-number - Revision indicator
Main number ................ The item number shown at the right of the index.
Sub-number ................. The number for the name shown for each sheet indicated in
the table of contents
Revision indicator ......... Indicator (A, B, C) used whenever modifications are made
to machinery
Type indicator ............. Indicator(A, B, C) to show different specifications
Example: IS-30G Operation
....... Item numberfome index
operational
(
-&Number corresponding to sheet names
............ engine control structure
Isuzu engine specifications
Perkins engine specifications
-~ewly manufactured due to improvements to
machinery : 6-2A as distinguished from 6-2

(5) Page No.
Serial page numbers from the text are used. To avoid confusion enough rough
inserting sheets by sheet number alone, page numbers are given for replacing
sheets as required.
List of parts
This consists of the key number, part number, description, quantity,
interchangeability (chan. 1, serial number, remarks, notes, and heading.
%H#%
KEY No.
(1)
@8%*
PART No.
@&&%
DESCRIPTION
(I) Key number
The key number, in principle, consists of one key number per part. Ilowever, in
cases where one key number has been assigned to more than one part. hyphenated
numbers are used (2, 2-1, 2-2, 2-3). Revisions in such cases are indicated by a dot
"a" preceding the key number.
(2) Part number
Part numbers are indicated by a nine digit code number, which is subdivided into
four-three-two-digit combinations for ease of reading. (Ten-digit code numbers are
subdivided into five-five digit combinations). For engine parts, the remarks
section indicates the parts number issued by the engine manufacturer, to enable
the ordering of such parts, which should be done direct to the manufacturer.
The symbols preceding each part number are explained below:
X ..... Part cannot be supplied.
*. . . . . Supplied as a separate part.
Part number is indicated in the remarks column.
A ..... Special order parts, which are manufactured after the order is received.
(NOTE: parts supply operations may make changes without prior notification)
# ...... Detailed diagram provided separately. See the remarks column for the
applicable sheet number.

(3) Part names (Description)
Each part name is listed. An asterisk preceding the part name indicates a
compositional part. All subsequent multiple asterisks indicate parts that are
structurally required for the assembly of the preceding part.
(Example)
1 5075 124 UA Roller Assembly.. . assembly part
2 5075 125 00 *Shaft ............ Compositonal part
3 5075 126 00 *Collar.. ......... Compositional part
4 5075 127 00 **Bushing ......... Compositional part for the collar
(4) Quantity
In principle, the quantity of parts required for one unit of machinery is given.
However, for structural assembly parts, the number of parts required to assemble
one set is given. Furthermore, for parts for which the number of compositional
pieces is not ascertainable, such as shims, "AR" (As Required) is given. A "( )"
preceding the number of units indicates that the same number of parts is required
as that for the other side, which is given in parentheses.
(5) Interchangeability
The following indications are used to show the interchangeability of parts in
machinery that has been modified.
A change has been made from the part shown at the top
Old part- to the part shown below. The new part is
New part
interchangeable with the old.
old
A change has been made from the part shown at the top
x to the part shown below. The new part is not
New interchangeable with the old.
Interchangeability of parts under certain conditions (interchangeability of multiple
parts) is not described here, but is given in the notes section beneath the parts
sections.
(6) Suitability for Different Machinery
The applicable equipment numbers for whith the part is used are given.
(Example)
1151 -. ............... May be used for all equipment number 1151 and equipment
subsequently numbered.
1152 - 115262 ......... Parts used in equipment numbered 1152 through 115262.
NOTE: The equipment numbers for whith parts are stated as being suitable are based on
plant shipments. Thus, information on modifications that have been made at
destination sites based on local service updates is not covered. Please refer
to related informational updates to ensure the appropriate parts are ordered.

(7) Remarks
The remarks column itemizes standard part sizes, type indicator, manufacturer-
based type indicator, engine manufacturer, etc. Abbreviations are as follows:
............ Sh.No. SlIEET No. W/ * * * * ........ With
................. e Length W/O * * * * ....... With-out
................ t.. Thickness I.D. .............. Inside diameter
P .................. Pitch O.D. .............. Out side diameter
(in detailed cases)
(8) Notes
This section is for noting special items whenever the columns for
interchangeability, suitability for various equipment, and remarks are unable to
accommodate them.
Index of Parts Numbers
All parts used in machines are given numbers and arranged from lowest number highest.
Refer to these to look up the section describing its use.
(Example)
Parts number Index
How to interpret a Sheet Number
Parts No. Sheet No.
502502112 0403 24
507052100 0602AA15 1
0602AA15 1 I) SHEET NO. 6-2A Key No. 15-1
- r L K e y No.
Parts No.
(1) Part No. 5025 021 12 is on Sheet No. 4-3, at Key No. 24.
(2) Part No. 5070 521 00 is on Sheet No. 6 - 2 ~ m , at Key No. 15-1.

SECTION 1
LOWER MACHINE
IHI Construction Machinery Limited

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IHI
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LOWER MACHINE ASS' Y
MODEL 55N SHEET No. 1-1

LEY No. YAK1 NO.
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NOTE
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Lower Machine Ass' y
=fk gD--7 Vz-
*Shoe, Rubber Crawler
gu-7 vz-#l*
*Shoe Ass' y, Crawler (Steel)
gu-7 vz-iRfl*
*Shoe ASS' y, Crawler (Steel)
pu-7 vz-#la
*Shoe Ass' y, Crawler (Steel)
PP-7 Va-;Ohla
*Shoe Ass' y, Crawler (Steel)
pD-7 vz-;Ohl*
*Shoe Ass'y, Crawler (Steel, Link Chain)
P7- 7L-k
*Frame, Lower
*A-
*Cover
%&BSIL t. (L. W, F.W.f;f )
*Bolt, Treatment (W/L.W, F. W)
7-7 Y
*Plug
7~9 a/<-
*Cover, Under
~&BSIL~. (L.W, F.WN BEI)
*Bolt, Treatment (W/L.W, F.W)
*A-
* Cover
*A-
*Cover
%&BSlL t.
*Bolt, Treatment
I-4
*Washer, Treatment
?Hi=€-b#H*
*Motor Ass' y, Traction
F747- 37-~9Yt.
*Sprocket, Drive
"U" S1L b
*Bolt, "U"
77,; p-s# i $Z
*Roller Ass'y, Upper
%&BS1Lb (7729.f.f)
*Bolt, Treatment (W/Flange)
%-&
*Washer, Treatment
%%!s!tYb (ME
*Nut, Treatment
*&BS1L b
*Bolt, Treatment
%-4
*Washer, Treatment
m7- m-?#&a
*Roller Ass' y, Lower
?a- fl4F
*Guide. Shoe (R.H.)
vz- 34F (&)
*Guide, Shoe (L.H. )
*Washer, Treatment
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e =4oo
Sh. No. 1-2
e =480
Sh. No. 1-2
e =550
Sh. No. 1-2
For HUTTER
Sh. No. 1-2W
e =4oo
Sh. No. 1-2[81
M16X40
M16
Sh. No. 5-1
Sh. No. 1-6
M14X40
M12
M12 P=1.25
M20X30
M20
Sh. No. 1-5
[HI
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LOWER MACHINE ASS' Y
REV. No. @
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MODEL 55N -3- SHEET NO. 1-1

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25
26
26-1
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NOTE
%mslk b
:Bolt, Treatment
?A
'Shim
VA
:Shim
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LOWER MACHINE ASS' Y REV No. @ -
MODEL 55N - SHEET No. 1-1 U
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IHI 55N Mini Excavator Parts Catalog
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Description
Looking to repair your IHI 55N MINI EXCAVATOR? Save on mechanic repair fees with the parts manual available below. These technical manuals are extremely detailed, containing hundreds of images, illustrations, and blown-up diagrams, making them useful for both professional mechanics and DIY enthusiasts.
- Lower Machine
- Turntable
- Swing Drive Device
- Hydraulic Piping
- Hydraulic Instrument
- Operating Controls
- Power Unit
- Cab & Related Parts
- Electric System
- Tools & Accessories
- Hoe Attachment
- Blade Attachments
- Option Specifications
- Parts Index
- PLUS MORE...
TOTAL PAGES: 321
FORMAT: PDF
LANGUAGE: English
COMPATIBLE: Win/Mac
- Easy to read and understand
- Step by Step Instructions
- Plenty of Pictures/Diagrams
- Save $$$
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