Download 133113925 GMK Schematic Handbook PDF

Title 133113925 GMK Schematic Handbook 782.0 KB 55
Table of Contents
```                            Introduction
Table of Contents
Section 1 Hydraulic Symbols
Section 2 Electric Symbols
Section 3 Pneumatic Symbols
Section 4 Elan Electrical Schematics
Index
```
Document Text Contents
Page 1

GMK I
Schematic Symbol Handbook

MAIN MENU

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Page 2

GMKGMK
Schematic Symbol
Handbook

Grove Training Institute
Second Edition

7 1 8 2 9

3 4 10

0 1

W
W

300 bar

X56 2X2 6

P

+ -L

G WK

2K20 B1 A1

A2

85

86 87 87 b

30

K10

1
23

4

2

bl

W
5 bar

S62

br

sw

sm07951
Stamp

Page 27

GMK Electrical Symbols

DescriptionDescription SymbolSymbol

Relay Identification - The letter K is used
to designate a relay. The prefix number
identifies which circuit the relay is used
in and the last number is used as
identification of a specific relay within a
circuit.

Superstructure Relay Identification -
Without any prefix - Safe load
indicator,
hoist limit, and or engine control
With prefix 0 = Pump Control
With prefix 1 = Main hoist
With prefix 2 = Auxiliary hoist
With prefix 3 = Telescope/Derricking

2K5
Circuit
Prefix

Relay identification
number

Relay - In this example, the relay coil
is shown as a separate symbol on the
schematic. The contacts for the relay
are drawn on the same page within the
same enclosure module, but they are
not connected with a line. When tracing
a circuit it is important to make sure you
are looking at the correct set of relay
contacts. A technician must always
look for the relay identification number.

Coil

85

86

K
5

0

K50
30

87 87 b

Contacts

K10

85

86 87 87 b

30

Relay - The same basic component can
also be represented schematically as
shown in this example. The major
difference is that a line connects the
coil of the relay to the contacts of the
relay. The theory of operation for these
two symbols is exactly the same.

2-11

Page 28

GMK Electrical Symbols

DescriptionDescription SymbolSymbol

Relay - Multiple contact relays are
commonly used on GMK machines. This
is an example of how a four contact
relay will be represented on an
electrical schematic. The numbers provide
a great deal of information that is necessary
for navigating through the various circuits.

The numbers on the left side of the contacts
represent the location of the contacts on
the schematic. A single number indicates
the contacts are on the same page as the
relay coil and can be found in grid 15.
The next example shows two numbers
with a period between them. The
first number represents the page number
the contacts can be located on and the
second number represents the grid on
that page. When a period is found beside
the contacts, this means the contacts are
not used in this circuit.

The numbers on the contacts also provide
information. The first number represents the
order the contacts are arranged on the
schematic. The second number tells you
if the contacts are normally open or are
normally closed. If you examine the other
sets of contacts, you should be able to see
this pattern.

Contacts
not used

Second set of
contacts

A1

A2

2K5

4.8

13 14

33 34

43 44

21 22

15

.
10

Coil terminals
Relay
Identification

Grid
number

Page &
Grid #

13 14

2221

Normally closed

Normally open

First set of
contacts

2-12

Page 54

G

Gate valve 1-2
Gauges 2-10
Grid lines 2-4
Grid map locator 2-3
Ground 2-5

H

Hydraulic pressure switch 1-2

J

Joystick 1-9

L

M

P

O

Line size 1-1
Lock valve 1-4
Logic valve 1-10
Lubrication pump 2-9

Male plug 2-5
Maxi brake chamber 3-5
Momentary toggle switch 2-7

Oil cooler assemble 1-7

Parking brake valve 3-5
Pilot operated control valve 1-5
Pilot operated dieectional
contro valve 1-6
Port identification 3-2
Pressure reducing valve 1-3, 3-2
Pressure switch 2-7, 3-1
Proximity switch 2-8
Pump/motor unit 1-9l

R

Q

Quick disconnect 1-2

Relay 2-11, 2-12, 2-13
relay identification 2-11
Relay valve 1-3, 3-3

S

Sending units 2-10
Service brake chamber 3-5
Service brake valve 3-4
Single-pole switch 2-8
Single-acting cylinder 1-7, 3-3
Solenoid valve 2-9
Speed control 1-9
Standby valve 1-6
Swing brake control pedal 1-9
Swivel slip-ring 2-9

Page 55

T

Temperature switch 2-7
Terminal connections 2-5
Terminal strip connections 2-6
Test port 1-1
Time delay relay 2-13
Tire inflator valve 3-4
Toggle switch 2-7

V

Variable displacement piston pump 1-8
Velocity fuse 1-4
Ventilation line 3-1

W

2-Way electric over hydraulic
directional control valve 1-6
3-Way electrically operated valve 1-5
3-Way electrically operated valve
with manual override 1-5
4-Way electrically operated valve
Working line 3-1