Hyundai 20L-7 User manual

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The following contains the Service Manual for the current Hyundai Construction

Equipment Forklift.

In order to effectively access and view this manual, please use Adobe Acrobat 7.0 or later

software. The latest version of Adobe Reader can be found and downloaded at no cost at

http://get.adobe.com/reader/. While viewing the manual, a window may pop-up

requesting download of a Korean plug-in to run the program properly. Download this

application to ensure compatibility of the PDF.

This software uses Bookmarks to help quickly access each section of the manual. Click

on the Bookmarks tab located on the left and click on the plus sign (+) to expand the

desired section. Alternatively click on the minus sign (-) to contract a section. Once a

section is expanded, you may click on a Section or Group to go directly to that page.

Another method of quickly accessing each page in the manual is going to the ‘Table of

Contents’ and clicking on the desired Section or Group. This will directly take you to that

page.

If any part of the manual needs to be printed, press the printer icon, or click on the FILE

menu and select print. This will open up the printing options window where you may

choose how to print the document.

0-1

FOREWORD

1. STRUCTURE

This service manual has been prepared as an aid to improve the quality of repairs by giving the

serviceman an accurate understanding of the product and by showing him the correct way to perform

repairs and make judgements. Make sure you understand the contents of this manual and use it to

full effect at every opportunity.

This service manual mainly contains the necessary technical information for operations performed in

a service workshop.

For ease of understanding, the manual is divided into the following sections.

SECTION 1 GENERAL

This section gives the general information of the machine and explains the safety hints for

maintenance.

SECTION 2 REMOVAL & INSTALLATION OF UNIT

This section explains the procedures and techniques of removal and installation of each component.

SECTION 3 POWER TRAIN SYSTEM

This section explains the structure of the transmission as well as control valve and drive axle.

SECTION 4 BRAKE SYSTEM

This section explains the brake piping, each component and operation.

SECTION 5 STEERING SYSTEM

This section explains the structure of the steering unit, priority valve, trail axle as well as steering

circuit and operation.

SECTION 6 HYDRAULIC SYSTEM

This section explains the structure of the gear pump, main control valve as well as work equipment

circuit, each component and operation.

SECTION 7 ELECTRICAL SYSTEM

This section explains the electrical circuit and each component.

It serves not only to give an understanding electrical system, but also serves as reference material for

troubleshooting.

SECTION 8 MAST

This section explains the structure of mast, carriage, backrest and forks.

The specifications contained in this service manual are subject to change at any time and without any

advance notice. Contact your HYUNDAI distributor for the latest information.

0-2

Revised edition mark(



)

When a manual is revised, an edition mark is

recorded on the bottom outside corner of the

pages.

Revisions

Revised pages are shown at the list of revised

pages on the between the contents page and

section 1 page.

Symbols

So that the shop manual can be of ample

practical use, important places for safety and

quality are marked with the following symbols.

2. HOW TO READ THE SERVICE MANUAL

Distribution and updating

Any additions, amendments or other changes will

be sent to HYUNDAI distributors.

Get the most up-to-date information before you

start any work.

Filing method

See the page number on the bottom of the

page.

File the pages in correct order.

Following examples shows how to read the

page number.

Example 1

2 - 3

Item number(2. Structure and

Function)

Consecutive page number for

each item.

Additional pages : Additional pages are

indicated by a hyphen(-) and number after the

page number. File as in the example.

Symbol Item Remarks

Special safety precautions are

necessary when performing the

work.

Extra special safety precautions

are necessary when performing

the work because it is under

internal pressure.

Special technical precautions or

other precautions for preserving

standards are necessary when

performing the work.

Safety

Caution



10 - 4

10 - 4 - 1

10 - 4 - 2

10 - 5

Added pages

0-3

3. CONVERSION TABLE

Method of using the Conversion Table

The Conversion Table in this section is provided to enable simple conversion of figures. For details of

the method of using the Conversion Table, see the example given below.

Example

Method of using the Conversion Table to convert from millimeters to inches

Convert 55

into inches.

Locate the number 50

the vertical column at the left side, take this as



, then draw a

horizontal line from



Locate the number 5

the row across the top, take this as



, then draw a perpendicular line

down from



Take the point where the two lines cross as



. This point



gives the value when converting

from millimeters to inches. Therefore, 55

= 2.165 inches.

Convert 550

into inches.

The number 550 does not appear in the table, so divide by 10(Move the decimal point one place

to the left) to convert it to 55

Carry out the same procedure as above to convert 55mm to 2.165 inches.

The original value(550

) was divided by 10, so multiply 2.165 inches by 10(Move the decimal

point one place to the right) to return to the original value.

This gives 550

= 21.65 inches.

(1)

(2)

(3)

(1)

(2)

(3)

Millimeters to inches 1

= 0.03937 in





01 2 345 678 9

0 0.039 0.079 0.118 0.157 0.197 0.236 0.276 0.315 0.354

10 0.394 0.433 0.472 0.512 0.551 0.591 0.630 0.669 0.709 0.748

20 0.787 0.827 0.866 0.906 0.945 0.984 1.024 1.063 1.102 1.142

30 1.181 1.220 1.260 1.299 1.339 1.378 1.417 1.457 1.496 1.536

40 1.575 1.614 1.654 1.693 1.732 1.772 1.811 1.850 1.890 1.929

50 1.969 2.008 2.047 2.087 2.126 2.165 2.205 2.244 2.283 2.323

60 2.362 2.402 2.441 2.480 2.520 2.559 2.598 2.638 2.677 2.717

70 2.756 2.795 2.835 2.874 2.913 2.953 2.992 3.032 3.071 3.110

80 3.150 3.189 3.228 3.268 3.307 3.346 3.386 3.425 3.465 3.504

90 3.543 3.583 3.622 3.661 3.701 3.740 3.780 3.819 3.858 3.898



0-4

Millimeters to inches 1

= 0.03937