Loader Bobcat 853, 853H. Manual — part 44
FUEL TANK
Removal And Installation
Remove the cover (Item 1) [A] which is installed over the
drain plug.
Remove the drain plug (Item 1) [B].
Drain the fuel into a container.
Check the drain plug and replace if necessary.
Remove the engine/hydrostatic pump assembly from the
loader (Page 7–1).
Disconnect the fuel fill hose (Item 1) [C].
Disconnect the tank vent hose (Item 2) [C].
Remove the bolts (Item 1) [D] from the battery holddown
plate.
Remove the battery holddown plate from the loader.
A
P–01616
1
C
P–04855
1
2
D
P–04959
1
853, 853H Loader
–5–15–
Service Manual
B
P–01619
1
FUEL TANK (Cont’d)
Removal And Installation (Cont’d)
Remove the mounting plate (Item 1) [A] for the battery
holddown plate.
Lift the fuel tank and remove it from the loader frame [B].
Fuel Level Sender
Loosen the fuel level sender (Item 1) [B].
Remove the fuel level sender from the fuel tank [C].
Inlet Screen
The inlet screen (Item 1) [D] is located at fuel tank fill
neck.
Disconnect the fuel fill hose.
Remove the inlet screen (Item 1) [D].
Wash the screen in clean solvent.
Dry the screen and check for damage. Replace as
needed.
A
P–04960
1
C
P–07922
D
P–05007
1
–5–16–
853, 853H Loader
Service Manual
B
P–04961
1
C
11
4
C
21
6
MC2561 (5-25-99)
S/N 508411001-11010
(Printed June 1999)
MC2561
853 BOSS - WIRING SCHEMATIC
START
RUN
OFF
ACC
2
1
PUR/WHT
RNG
RNG
DBL/WHT
RNG
WHT
BLK
RED/WHT
IGNITION SWITCH
B
I
ST
SO
BLK
PUR/RED
C
20
4
BLK
TO OPTIONS
(FRONT WIPER)
LIGHT SWITCH
(IF EQUIPPED)
CAB HARNESS (BOSS) - 6576352
FLASHER
BR
N
BRN
BR
N
LEFT
FLASHER
LAMP
(IF
EQUIPPED)
BOSS DISPLAY
4
3
2
1
D
E
A
C
B
PUR/RED
PUR/WHT
RNG
BLK
RED
PUR/RED
PUR/WHT
BLK
DIAGNOSTIC PORT
C
11
5
C
20
1
DGN/WHT
DGN/WHT
C119
D
BL
LEFT
HEADLIGHT
(IF
EQUIPPED)
BLK
RED/WHT
PNK
RNG
RED
RED
RED
RED/WHT
ACCESSORY FUSE HOLDER
RED/WHT
B
R
N
LCD DISPLAY MONITOR
BLK
WHT
DBL/WHT
PNK
PUR/WHT
PUR/RED
RNG
RNG
BLK
RNG
BL
K
BL
K
R
N
G
R
N
G
PU
R
/R
E
D
PU
R
/W
H
T
W
H
T/
R
N
G
R
N
G
/W
H
T
R
N
G
/W
H
T
YEL
/R
ED
BL
K
BL
K
PU
R
/R
ED
YE
L/
LBL
BL
K
BL
K
PU
R
BL
K
YE
L/
LBL
BL
K
YEL
/BR
N
BL
K
YEL
/D
BL
D
BL
/YEL
AIR
FILTER
HR
C
A
B
STARTER RELAY
SHUTDOWN RELAY
WIRES CONNECT BY
LETTER ACROSS
CONNECTORS
A
B A
B
WHT/LGN
GLOW PLUG RELAY
M
S
B
STARTER
BATTERY
RED
RED
G
RED
S
ALTERNATOR
B
RED
RED
87
87A
30
86
85
BLK
DBL/WHT
PNK
BLK
85
87
87A
LBL/BLK
LBL/RNG
RED
BLK
RED
86
30
85
WHT
87
87A
C
10
7
SOME CONNECTOR
BODIES NOT SHOWN
FOR DRAWING CLARITY
BLK
RNG
h
BL
K
C121
R
N
G
GLOW
PLUGS
BOSS
FUEL SHUTOFF
SOLENOID
FUEL
LEVEL
ENGINE OIL
PRESSURE
ENGINE
COOLANT
LGN
C118
LGN/WHT
PUR
EXC
B
RED
YEL
/D
G
N
R
N
G
/D
BL
WHT/BLK
86
30
AUXILIARY
HOURMETER AND
HARNESS (IF EQUIPPED)
ENGINE RPM
(MAGNETIC PICKUP)
#
H
2
* * *
G
1
C
3
PIN NUMBER = 30 PIN CONNECTOR
*
C
3
* * *
C
2
D
3
C
1
#
# # # # #
C
2
A
2
A
3
B
1
B
2
B
3
* * * *
F
3
E
1
B
2
B
1
# # # #
D
1
C
1
D
3
D
2
#
E
3
* * * * * * * *
D
1
D
2
E
2
E
3
H
1
H
3
B
3
A
1
#
PIN NUMBER = 18 PIN CONNECTOR
* * * * *
* *
F
2
G
2
G
3
J
1
J
3
J
2
K
1
#
# #
F
3
E
2
F
2
*
* * *
F
1
K
2
A
3
A
2
# #
#
F
1
E
1
A
1
ENGINE HARNESS (BOSS) - 6579653
BACKUP
ALARM
A
B
C
BL
K
BL
K
PN
K
PN
K
B
LK
D
BL
/W
H
T
BLK
B
LK
DBL/WHT
RNG/DGN
PNK
RNG
LEFT
TAILLIGHT
RIGHT
TAILLIGHT
REAR LIGHT HARNESS - 6577648
LEFT
WORK
LIGHT
RIGHT
WORK
LIGHT
LGN/RED
RED
LGN/PNK
RNG
DGN/YEL
LGN/DBL
DETENT LIGHT
MODE LIGHT
AUXILIARY HYDRAULIC SWITCH
(IF EQUIPPED)
D
C
E
F
B
A
E
B
A
RED
C
D
F
RED
LG
N
/D
BL
D
G
N
/YE
L
R
N
G
LG
N
/P
N
K
B
LG
N
/R
ED
PU
R
/L
BL
BL
K
LBL
/W
H
T
R
E
D
RED
C
10
6
RETURN FILTER
PRESSURE
PRE-FILTER
PRESSURE
HYDRAULIC
OIL
PRESSURE
COOLANT
LEVEL
HYDRAULIC
OIL
TEMPERATURE
HYDRAULIC
CHARGE
PRESSURE
BLK
RED
RNG
RED/WHT
A
B
BL
K
R
N
G
BLK
BLK
DGN/RED
DGN/WHT
C110
C
41
4
C
41
5
C407
C408
YEL/LGN
BL
K
RNG
B
CONTROLS MODULE
FRONT AUXILIARY
ROD SOLENOID
FRONT AUXILIARY
BASE SOLENOID
CONTROLS HARNESS - 6579881
D
G
N
D
G
N
/L
G
N
R
N
G
R
N
G
LG
N
/D
BL
LG
N
/PN
K
LG
N
/R
ED
D
G
N
/Y
EL
LG
N
/PN
K
LG
N
/R
ED
LG
N
/D
BL
R
N
G
B
A
B
A
B
A
B
A
C
41
1
C
41
0
BLK
BLK
B
A
A
B
A
B
A
B
REAR AUXILIARY
ROD SOLENOID
REAR AUXILIARY
BASE SOLENOID
YEL/WHT
YEL
DGN/LGN
RNG
DGN/RED
DGN
D
G
N
/R
ED
YEL
/W
H
T
D
G
N
/W
H
T
Y
EL
/L
G
N
D
G
N
/R
ED
YEL
LBL
/R
ED
A
B
FOR FUTURE USE
C
41
3
LBL/RED
BLK
C
40
2
B
A
C
40
3
A
B
C
40
4
RNG
DGN
B
A
A
B
DGN/RED
DGN/LGN
CONTROLS HARNESS -
6576323
BL
K
D
BL
BR
N
RIGHT
HEADLIGHT
(IF
EQUIPPED)
RIGHT
FLASHER
LAMP
(IF
EQUIPPED)
C122
BL
K
BL
K
R
N
G
BL
K
LBL/BLK
*
D
1
B
A
CONTROLS HARNESS -
6576297
RNG
YEL
RNG/DBL
FUSE
IGNITION FUSE HOLDER
C120
C
11
6
HORN
B2
B1
WARNING
HEADLIGHT
REAR WORK
TAIL
FUSE
FRONT AUX.
RIGHT HANDLE
(IF EQUIPPED)
DETENT
LEFT HANDLE
(IF EQUIPPED)
HORN
REAR AUX.
RED/WHT
RESISTOR
5 OHM
C
20
3
A
A B
B A
B A
A
C
G J
K
H
F
D
E
J
C K
G H F A D B E
F
D
E
A K J H G C
B
E D F
A K J H G C
B A D F E C
B A D F E C
RNG
C
10
5
TO OPTIONS
C
10
8
RED/WHT
TO OPTIONS
GRY = GREY
WHT = WHITE
PUR = PURPLE
TAN = TAN
BRN = BROWN
PNK = PINK
YEL = YELLOW
DGN = DARK GREEN
LGN = LIGHT GREEN
DBL = DARK BLUE
LBL = LIGHT BLUE
BLK = BLACK
RNG = ORANGE
RED = RED
C
11
4
MC2562 (5-25-99)
S/N 508411011-11353
(Printed June 1999)
MC2562
853 BOSS - WIRING SCHEMATIC
START
RUN
OFF
ACC
2
1
PUR/WHT
RNG
RNG
DBL/WHT
RNG
WHT
BLK
RED/WHT
IGNITION SWITCH
B
I
ST
SO
BLK
PUR/RED
RED/WHT
C
20
4
BLK
TO OPTIONS
(FRONT WIPER)
CAB HARNESS (BOSS) - 6702610
FLASHER
BR
N
BRN
BR
N
LEFT
FLASHER
LAMP
(IF
EQUIPPED)
BOSS DISPLAY
4
3
2
1
D
E
A
C
B
PUR/RED
PUR/WHT
RNG
BLK
RED
PUR/RED
PUR/WHT
BLK
DIAGNOSTIC PORT
C
20
1
C
21
6
DGN/WHT
DGN/WHT
C119
D
B
L
LEFT
HEADLIGHT
(IF
EQUIPPED)
BLK
RED/WHT
RNG
BR
N
LCD DISPLAY MONITOR
BLK
WHT
DBL/WHT
PNK
PUR/WHT
PUR/RED
RNG
RNG
BLK
RNG
BL
K
BL
K
R
N
G
R
N
G
PU
R
/R
ED
PU
R
/W
H
T
W
H
T/
R
N
G
R
N
G
/W
H
T
R
N
G
/W
H
T
YE
L/
R
E
D
BL
K
BL
K
P
U
R
/R
ED
YE
L/
LB
L
BL
K
BL
K
PU
R
BL
K
YE
L/
LB
L
BL
K
YE
L/
BR
N
BL
K
YE
L/
D
B
L
D
BL
/YE
L
HR
C
A
B
STARTER RELAY
SHUTDOWN RELAY
WIRES CONNECT BY
LETTER ACROSS
CONNECTORS
A
B A
B
WHT/LGN
GLOW PLUG RELAY
M
S
B
STARTER
BATTERY
RED
RED
G
RED
S
ALTERNATOR
B
RED
RED
87
87A
30
86
85
BLK
DBL/WHT
PNK
BLK
85
87
87A
LBL/BLK
LBL/RNG
RED
BLK
RED
86
30
85
WHT
WHT/LGN
87
87A
C
10
7
SOME CONNECTOR
BODIES NOT SHOWN
FOR DRAWING CLARITY
BLK
RNG
h
B
LK
C121
R
N
G
GLOW
PLUGS
BOSS
FUEL SHUTOFF
SOLENOID
FUEL
LEVEL
ENGINE OIL
PRESSURE
ENGINE
COOLANT
LGN
C118
LGN/WHT
PUR
EXC
RED
YEL
/D
G
N
R
N
G
/D
BL
WHT/BLK
86
30
AUXILIARY
HOURMETER AND
HARNESS (IF EQUIPPED)
ENGINE RPM
(MAGNETIC PICKUP)
#
H
2
* * *
G
1
C
3
PIN NUMBER = 30 PIN CONNECTOR
*
C
3
* * *
C
2
D
3
C
1
#
# # # # #
C
2
A
2
A
3
B
1
B
2
B
3
* * * *
F
3
E
1
B
2
B
1
# # # #
D
1
C
1
D
3
D
2
#
E
3
* * * * * * * *
D
1
D
2
E
2
E
3
H
1
H
3
B
3
A
1
#
PIN NUMBER = 18 PIN CONNECTOR
* * * * *
* *
F
2
G
2
G
3
J
1
J
3
J
2
K
1
#
# #
F
3
E
2
F
2
*
*
* *
F
1
K
2
A
3
A
2
# #
#
F
1
E
1
A
1
ENGINE HARNESS (BOSS) - 6702898
BACKUP
ALARM
A
B
C
B
LK
B
LK
PN
K
PN
K
BL
K
D
BL
/W
H
T
BLK
BL
K
DBL/WHT
RNG/DGN
PNK
RNG
LEFT
TAILLIGHT
RIGHT
TAILLIGHT
REAR LIGHT HARNESS - 6577648
LEFT
WORK
LIGHT
RIGHT
WORK
LIGHT
LGN/RED
RED
LGN/PNK
RNG
DGN/YEL
LGN/DBL
DETENT LIGHT
MODE LIGHT
AUXILIARY HYDRAULIC SWITCH
(IF EQUIPPED)
D
C
E
F
B
A
E
B
A
RED
C
D
F
RED
LG
N
/D
BL
D
G
N
/Y
EL
R
N
G
LG
N
/PN
K
LG
N
/R
ED
PU
R
/L
BL
BL
K
LBL
/W
H
T
R
ED
RED
C
10
6
HYDRAULIC
CHARGE
PRESSURE
BLK
RNG
RED/WHT
A
B
BL
K
R
N
G
BLK
BLK
DGN/RED
DGN/WHT
C110
C
41
4
C
41
5
C407
C408
BL
K
RNG
CONTROLS MODULE
FRONT AUXILIARY
ROD SOLENOID
FRONT AUXILIARY
BASE SOLENOID
CONTROLS HARNESS -
6702634
D
G
N
D
G
N
/L
G
N
R
N
G
R
N
G
LG
N
/D
BL
LG
N
/P
N
K
LG
N
/R
ED
D
G
N
/Y
EL
LG
N
/P
N
K
LG
N
/R
ED
LG
N
/D
BL
R
N
G
B
A
B
A
B
A
B
A
C
41
1
C
41
0
BLK
BLK
B
A
A
B
A
B
A
B
REAR AUXILIARY
ROD SOLENOID
REAR AUXILIARY
BASE SOLENOID
YEL/WHT
YEL
DGN/LGN
RNG
DGN/RED
DGN
D
G
N
/R
ED
YEL
/W
H
T
D
G
N
/W
H
T
YEL
/L
G
N
D
G
N
/R
ED
YEL
C
40
2
B
A
C
40
3
A
B
C
40
4
RNG
A
B
YEL
YEL/WHT
CONTROLS HARNESS -
6702633
BL
K
D
B
L
BR
N
RIGHT
HEADLIGHT
(IF
EQUIPPED)
RIGHT
FLASHER
LAMP
(IF
EQUIPPED)
C122
BL
K
BL
K
R
N
G
BL
K
LBL/BLK
*
D
1
RED/WHT
DIODE
R
E
D
/W
H
T
AC
C
ES
SO
R
Y
FU
SE
R
ED
/W
H
T
EN
G
IN
E
FU
SE
RED/WHT
RNG/DBL
C
40
1
A
B
YEL
YEL/WHT
DIODE
DIODE
DIODE
DIODE
DIODE
DIODE
DIODE
DIODE
C
11
6
C
11
5
RETURN FILTER
PRESSURE
HYDRAULIC
OIL
PRESSURE
PRE-FILTER
PRESSURE
HYDRAULIC
OIL
TEMPERATURE
COOLANT
LEVEL
AIR
FILTER
C120
LEFT HANDLE
(IF EQUIPPED)
HORN
REAR AUX.
LIGHT SWITCH
(IF EQUIPPED)
B1
B2
WARNING
HEADLIGHT
REAR WORK
TAIL
RED/WHT
PNK
HORN
A
B
RNG
DGN
B
A
A
B
DGN/RED
DGN/LGN
CONTROLS HARNESS -
6576323
RIGHT HANDLE
(IF EQUIPPED)
DETENT
FRONT AUX.
RESISTOR
5 OHM
C
20
3
B
A
A B
B A
B A
B
E D F
A K J H G C
B
E D F
A K J H G C
B A D F E C
B A D F E C
B
C A
G J F K D H E
C
G
F
D
E
K J
H
A
B
RNG
C
10
5
TO OPTIONS
TO OPTIONS
RED/WHT
C
10
8
RED/WHT
GRY = GREY
WHT = WHITE
PUR = PURPLE
TAN = TAN
BRN = BROWN
PNK = PINK
YEL = YELLOW
DGN = DARK GREEN
LGN = LIGHT GREEN
DBL = DARK BLUE
LBL = LIGHT BLUE
BLK = BLACK
RNG = ORANGE
RED = RED
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