Loader Bobcat 853, 853H. Manual — part 48
RED = RED
RNG = ORANGE
BLK = BLACK
LBL = LIGHT BLUE
DBL = DARK BLUE
LGN = LIGHT GREEN
DGN = DARK GREEN
YEL = YELLOW
PNK = PINK
BRN = BROWN
TAN = TAN
PUR = PURPLE
WHT = WHITE
GRY = GREY
C
21
6
C
12
4
C
11
6
C
11
5
C
20
1
C
11
4
RED/WHT
C
10
8
RED/WHT
TO OPTIONS
TO OPTIONS
C
10
5
RNG
A
B
A
B
E
H
D
K
F
J
G
A
C
B
A
B
A
B
B
A
A B
5 OHM
RESISTOR
FILTER
AIR
LEVEL
COOLANT
TEMPERATURE
OIL
HYDRAULIC
PRESSURE
PRE-FILTER
PRESSURE
OIL
HYDRAULIC
PRESSURE
RETURN FILTER
C120
BLK
YEL/LBL
A
B
B
A
TRANSDUCER HARNESS - 6704345
C
12
3
PRESSURE
CHARGE
HYDRAULIC
RNG
RED
TO OPTIONS
C
10
6
RNG/DGN
RNG
LIGHT
WORK
RIGHT
LIGHT
WORK
LEFT
REAR LIGHT HARNESS - 6704232
TAILLIGHT
RIGHT
TAILLIGHT
LEFT
BL
K
D
BL
/W
H
T
BL
K
PN
K
PN
K
B
LK
B
LK
ALARM
BACKUP
RNG/DGN
RNG
D
C
D
C
E
E
RED/WHT
EN
G
IN
E
FU
SE
R
ED
/W
H
T
AC
C
ES
SO
R
Y
FU
SE
R
E
D
/W
H
T
DIODE
D
1
*
LBL/BLK
BL
K
R
N
G
BL
K
BL
K
C122
C110
RED/WHT
RNG
BLK
6660316 WAS 6651570
VACUUM SWITCH
RED
R
ED
LBL
/W
H
T
BL
K
PU
R
/L
BL
LG
N
/R
ED
LG
N
/PN
K
R
N
G
D
G
N
/Y
EL
LG
N
/D
BL
RED
F
D
C
RED
A
B
E
PNK
DBL/WHT
BLK
B
F
A
ENGINE HARNESS (BOSS) - 6704234
A
1
E
1
F
1
#
#
#
A
2
A
3
K
2
F
1
*
*
*
*
F
2
E
2
F
3
#
#
#
K
1
J
2
J
3
J
1
G
3
G
2
F
2
*
*
*
*
*
*
*
PIN NUMBER = 18 PIN CONNECTOR
#
A
1
B
3
H
3
H
1
E
3
E
2
D
2
D
1
*
*
*
*
*
*
*
*
E
3
#
D
2
D
3
C
1
D
1
#
#
#
#
B
1
B
2
E
1
F
3
*
*
*
*
B
3
B
2
B
1
A
3
A
2
C
2
#
#
#
#
#
#
C
1
D
3
C
2
*
*
*
C
3
*
PIN NUMBER = 30 PIN CONNECTOR
C
3
G
1
*
*
*
H
2
#
(MAGNETIC PICKUP)
ENGINE RPM
TO OPTIONS
HERE OR
HARNESS (IF EQUIPPED)
HOURMETER AND
AUXILIARY
30
86
WHT/BLK
R
N
G
/D
B
L
YEL
/D
G
N
6651664
RED
EXC
PUR
LGN/WHT
C118
LGN
COOLANT
ENGINE
PRESSURE
ENGINE OIL
LEVEL
FUEL
SOLENOID
FUEL SHUTOFF
BOSS
PLUGS
GLOW
R
N
G
C121
B
LK
h
RNG
BLK
FOR DRAWING CLARITY
BODIES NOT SHOWN
SOME CONNECTOR
C
12
8
87A
87
WHT/LGN
WHT
85
30
86
RED
BLK
RED
LBL/RNG
LBL/BLK
87A
87
85
BLK
PNK
DBL/WHT
BLK
85
86
30
87A
87
RED
RED
B
ALTERNATOR
S
G
RED
RED
BATTERY
STARTER
B
S
M
GLOW PLUG RELAY
WHT/LGN
B
A
B
A
CONNECTORS
LETTER ACROSS
WIRES CONNECT BY
SHUTDOWN RELAY
STARTER RELAY
F
A
B
HR
D
BL
/YE
L
YE
L/
D
B
L
BL
K
YE
L/
BR
N
BL
K
Y
EL
/L
B
L
BL
K
PU
R
BL
K
BL
K
Y
EL
/L
B
L
P
U
R
/R
ED
BL
K
BL
K
YE
L/
R
E
D
R
N
G
/W
H
T
R
N
G
/W
H
T
W
H
T/
R
N
G
PU
R
/W
H
T
PU
R
/R
ED
R
N
G
R
N
G
BL
K
BL
K
RNG
BLK
RNG
RNG
PUR/RED
PUR/WHT
PNK
DBL/WHT
WHT
BLK
C119
853 BOSS - WIRING SCHEMATIC
V-0803
(Printed January 2005)
S/N 512811001 - 14999
V-0803 (12-12-05)
RED
C
20
3
RED/WHT
TAIL
REAR WORK
HEADLIGHT
WARNING
B2
B1
(IF EQUIPPED)
LIGHT SWITCH
TO ENGINE
CAB HARNESS (BOSS) - 6705136
BLK
RNG/DBL
RNG/DBL
RED/WHT
MODE LIGHT
DETENT LIGHT
EQUIPPED)
(IF
LAMP
FLASHER
RIGHT
EQUIPPED)
(IF
LAMP
FLASHER
LEFT
EQUIPPED)
(IF
HEADLIGHT
RIGHT
EQUIPPED)
(IF
HEADLIGHT
LEFT
BR
N
D
B
L
BL
K
START
RUN
OFF
ACC
A
B
F
E
C
D
(IF EQUIPPED)
AUXILIARY HYDRAULIC SWITCH
LGN/DBL
DGN/YEL
RNG
LGN/PNK
RED
LGN/RED
LCD DISPLAY MONITOR
B
R
N
ST
RNG
RNG
BLK
PNK
RED/WHT
RNG
WHT
BLK
D
B
L
BR
N
BR
N
DGN/WHT
DGN/WHT
DIAGNOSTIC PORT
BLK
PUR/WHT
PUR/RED
BLK
RNG
PUR/WHT
PUR/RED
B
C
A
E
D
1
2
3
4
BOSS DISPLAY
PUR/RED
BLK
BRN
FLASHER
(FRONT WIPER)
TO OPTIONS
C
20
4
RED/WHT
SO
I
B
IGNITION SWITCH
RED/WHT
BLK
DBL/WHT
RNG
PUR/WHT
1
2
ATTACHMENT
HERE OR TO
C
46
0
ATTACHMENT
HERE OR TO
C
46
0
C
44
1
C
45
7
REAR AUX.
TURN
SIGNAL
B
A
C
DGN
BRN
YEL
RNG
YEL/LGN
YEL/RED
WHT
RNG/WHT
HORN
SKI CONTROL
B
A
C
A
B
B
A
ATTACHMENT
TO
RNG/DBL
LEFT HANDLE (IF EQUIPPED)
C
40
3
DBL
C
44
0
C
44
1
C
44
0
C
45
7
REAR AUX.
SIGNAL
TURN
C
A
B
YEL
BRN
DGN
RNG
YEL/RED
YEL/LGN
YEL
C120
WITH FRONT AUXILIARY VALVE
C
45
9
C
45
8
DGN
DBL
C
40
3
LGN
B
F
E
A
LEFT HANDLE (IF EQUIPPED)
RIGHT HANDLE (IF EQUIPPED)
RNG/DBL
DGN
ATTACHMENT
TO
ATTACHMENT
TO
AUX.
FRONT
C
B
A
A
B
A
B
B
A
C
A
B
D
C
SKI CONTROL
HORN
SKI CONTROL
WATER KIT
DETENT
RNG/WHT
DGN/RED
DGN/LGN
RNG/WHT
RNG
YEL
WHT
F
E
B
D
A
K
J
G
H
C
C
41
4
C
41
5
HORN
D
G
N
/R
ED
DGN
RNG
DGN/RED
RNG
A
DGN/LGN
C
YEL
YEL/WHT
BASE SOLENOID
REAR AUXILIARY
ROD SOLENOID
REAR AUXILIARY
B
A
B
A
B
A
A
B
BLK
BLK
C
41
0
C
41
1
A
B
A
B
A
B
A
B
R
N
G
LG
N
/D
BL
LG
N
/R
ED
LG
N
/PN
K
D
G
N
/YE
L
LG
N
/R
ED
LG
N
/PN
K
LG
N
/D
BL
R
N
G
R
N
G
F
F
E
E
D
D
YEL
YEL/WHT
RNG
B
D
G
N
/L
G
N
D
G
N
R
N
G
CONTROLS HARNESS - 6705283
BASE SOLENOID
FRONT AUXILIARY
ROD SOLENOID
FRONT AUXILIARY
CONTROLS MODULE
B
A
C
B
A
C
H
A
B
E
F
G
C
K
J
D
H
A
B
E
F
G
C
A
B
RNG
BL
K
RNG/DBL
C408
C407
D
C
B
DGN/LGN
DGN/RED
BLK
BLK
R
N
G
BL
K
J
K
B
A
A
C120
WITHOUT FRONT AUXILIARY VALVE
C
45
9
C
45
8
DGN
LGN
B
F
E
A
RIGHT HANDLE (IF EQUIPPED)
DGN
ATTACHMENT
TO
AUX.
FRONT
C
B
A
A
B
D
C
SKI CONTROL
WATER KIT
DETENT
DGN/RED
DGN/LGN
RNG/WHT
RNG
YEL
B
F
A
K
J
G
H
E
D
C
D
B
E
C
A
F
D
B
E
C
A
F
J
H
K
C
E
G
A
B
D F
J
H
K
C
E
G
A
F
D
B
C
41
4
C
41
5
C
41
3
HORN
LBL
/R
ED
LBL/RED
RELIEF SOLENOID
HIGH PRESSURE
YE
L
YE
L
D
G
N
/L
G
N
CONTROLS HARNESS - 6702999
D
G
N
/R
ED
DGN
RNG
DGN/RED
RNG
A
DGN/LGN
C
B
A
A
B
BLK
A
B
A
B
A
B
A
B
R
N
G
LG
N
/D
B
L
LG
N
/R
E
D
LG
N
/PN
K
D
G
N
/YEL
LG
N
/R
E
D
LG
N
/PN
K
LG
N
/D
B
L
R
N
G
R
N
G
YEL
YEL/WHT
RNG
B
D
G
N
/L
G
N
D
G
N
R
N
G
BASE SOLENOID
FRONT AUXILIARY
ROD SOLENOID
FRONT AUXILIARY
CONTROLS MODULE
ATTACHMENT
TO
A
B
RNG
BL
K
RNG/DBL
C408
C407
C
B
DGN/LGN
DGN/RED
BLK
BLK
R
N
G
B
LK
B
A
A
1.
Alternator belt is loose or damaged.
2.
Battery connections are dirty or loose.
3.
Battery is damaged.
4.
The cable & wire connection are not making a good contact.
5.
The alternator is damaged.
6.
The engine is locked.
7.
The starter is damaged.
8.
The wiring or the solenoid is damaged.
9.
Check the fuses.
PROBLEM
CAUSE
Battery will not take a charge.
2, 3, 4
Alternator will not charge.
1, 4
Starter will not turn the engine.
2, 3, 4, 6, 7, 8, 9
KEY TO CORRECT THE CAUSE
TROUBLESHOOTING
Chart
The following troubleshooting chart is provided for
assistance in locating and correcting problems. Many of
the recommended procedures must be done by
authorized Bobcat Service Personnel only.
Instructions are necessary before operating or
servicing machine. Read and understand the
Operation & Maintenance Manuals, Handbook
and signs (decals) on machine. Follow
warnings and instructions in the manuals when
making repairs, adjustments or servicing.
Check for correct function after adjustments,
repairs or service. Untrained operators and
failure to follow instructions can cause injury
or death.
W–2003–0199
853, 853H Loader
–6–5–
Service Manual
ELECTRICAL SYSTEM INFORMATION
Description
The loader has a 12 volt, negative ground alternator
charging system. The electrical system is protected by
fuses. The fuses will protect the electrical system when
there is an electrical overload. The reason for the
overload must be found before starting the engine again.
Fuse Location
The electrical system for the (S/N 5102), (S/N 5103) and
earlier model 853 loaders are protected by two fuses
(Item 1) [A] installed in the wiring harness located in the
engine compartment.
The electrical system for the (S/N 5101) and (S/N 11010
& Below) loaders are protected by two fuses (Item 1) [B]
installed in the instrument panel.
A
P–00910
1
–6–6–
853, 853H Loader
Service Manual
B
B–12883
B–13752
1
1
(S/N 5101)
(S/N 11010 & Bel.)
BATTERY
Removal And Installation
Open the rear door.
Disconnect the negative(–) cable (Item 1) [A] from the
battery.
Disconnect the positive (+) cable (Item 1) [B] from the
battery.
Remove the nuts from the holddown clamp (Item 2) [B]
and remove the battery holddown clamp.
Remove the battery from the loader [C].
Batteries contain acid which burns eyes and
skin on contact. Wear goggles, protective
clothing and rubber gloves to keep acid off
body.
In case of acid contact, wash immediately with
water. In case of eye contact get prompt medical
attention and wash eye with clean, cool water
for at least 15 minutes.
If electrolyte is taken internally drink large
quantities of water or milk! DO NOT induce
vomiting. Get prompt medical attention.
W–2065–1296
A
CD–15008
1
C
CD–15137
853, 853H Loader
–6–7–
Service Manual
B
CD–15136
2
1
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