104741-4131 ZEXEL 9 460 612 962 BOSCH INJECTION-PUMP ASSEMBLY 9460612962 1047414131 1670056t01

Information Cross number Calibration Data Calibration Data Ex

Information injection-pump assembly

BOSCH 9 460 612 962 9460612962

ZEXEL 104741-4131 1047414131

NISSAN 1670056T01 1670056t01

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Buy INJECTION-PUMP ASSEMBLY 104741-4131 zexel genuine, new aftermarket engine parts with delivery

Components :

0.	INJECTION-PUMP ASSEMBLY	104741-4131
1.	_
2.	FUEL INJECTION PUMP	104641-4131
3.	NUMBER PLATE	146950-8400
4.	_
5.	CAPSULE
6.	ADJUSTING DEVICE
7.	NOZZLE AND HOLDER ASSY	105141-1961
8.	Nozzle and Holder	16600-T9000
9.	Open Pre:MPa(Kqf/cm2)	9.8{100}
10.	NOZZLE-HOLDER	105071-1271
11.	NOZZLE	105000-1080

Scheme ###:

1/6.	[1]	146601-0900	PACKING RING
6.	[1]	146100-0420	SUPPLY PUMP
9.	[1]	146103-0100	COVER
10.	[2]	139104-0000	FLAT-HEAD SCREW
12.	[1]	146200-0020	DRIVE SHAFT
12/1.	[1]	146200-0000	DRIVE SHAFT
12/2.	[1]	146201-0000	WOODRUFF KEY
12/3.	[2]	146202-0100	DAMPER
12/4.	[1]	146203-0000	TOOTHED GEAR
17.	[1]	146204-0000	PLAIN WASHER
20.	[1]	146210-2320	ROLLER SET
24.	[1]	146303-0000	BEARING PIN
25.	[1]	146304-0000	BEARING PIN
26.	[1]	146305-0000	CLAMPING BAND
27.	[1]	146205-0000	SLOTTED WASHER
29.	[1]	146220-2120	CAM PLATE
30.	[1]	146600-3000	O-RING
31.	[1]	146311-5620	PUMP PLUNGER
32.	[1]	146301-0000	SLIDING PIECE
34.	[1]	146312-2500	COMPRESSION SPRING
34B.	[1]	146312-2400	COMPRESSION SPRING
34C.	[1]	146312-2300	COMPRESSION SPRING
36.	[1]	146600-3000	O-RING
37.	[1]	146310-3920	COVER
38.	[2]	146620-6300	BLEEDER SCREW
39.	[1]	146310-0901	COVER
40.	[2]	146620-5000	BLEEDER SCREW
41.	[1]	146312-1900	COMPRESSION SPRING
42.	[1]	146602-8500	PLAIN WASHER
43.	[1]	146230-0000	SHIM
44.	[1]	146230-0100	PLAIN WASHER
45.	[1]	146231-0001	SLOTTED WASHER
47.	[2]	146233-0000	SLOTTED WASHER
48/1.	[1]	146603-0000	SHIM D17.0&5.2T0.50
48/1.	[1]	146603-0100	SHIM D17.0&5.2T0.80
48/1.	[1]	146603-0200	SHIM D17.0&5.2T1.00
48/1.	[1]	146603-0300	SHIM D17.0&5.2T1.20
48/1.	[1]	146603-0400	SHIM D17.0&5.2T1.50
48/1.	[1]	146603-0500	SHIM D17.0&5.2T1.80
48/1.	[1]	146603-0600	SHIM D17.0&5.2T2.00
48/1.	[1]	146690-1400	SHIM D17&5.2T0.9
48/1.	[1]	146690-1500	SHIM D17&5.2T1.1
48/1.	[1]	146690-1600	SHIM D17&5.2T1.3
48/1.	[1]	146690-1700	SHIM D17&5.2T1.4
48/1.	[1]	146690-1800	SHIM D17&5.2T1.6
48/1.	[1]	146690-1900	SHIM D17&5.2T1.7
48/1.	[1]	146690-5800	SHIM
48/1.	[1]	146690-5900	SHIM
48/1.	[1]	146690-6000	SHIM
48/1.	[1]	146690-6100	SHIM
48/1.	[1]	146690-6200	SHIM
48/1.	[1]	146690-6300	SHIM
48/1.	[1]	146690-6400	SHIM
48/1.	[1]	146690-6500	SHIM
48/1.	[1]	146690-6600	SHIM
48/1.	[1]	146690-6700	SHIM
48/1.	[1]	146690-6800	SHIM
48/1.	[1]	146690-6900	SHIM
48/1.	[1]	146690-7000	SHIM
48/1.	[1]	146690-7100	SHIM
48/1.	[1]	146690-7200	SHIM
48/1.	[1]	146690-7300	SHIM
48/1.	[1]	146690-7400	SHIM
48/1.	[1]	146690-7500	SHIM
48/1.	[1]	146690-7800	SHIM
49.	[2]	146234-0020	GUIDE PIN
50.	[1]	146403-3320	HYDRAULIC HEAD
50.	[1]	146403-3320	HYDRAULIC HEAD
50.	[1]	146403-3320	HYDRAULIC HEAD
51.	[1]	146600-0000	O-RING
52/1.	[1]	146420-0000	SHIM D9.5&3.0T1.90
52/1.	[1]	146420-0100	SHIM D9.5&3.0T1.92
52/1.	[1]	146420-0200	SHIM D9.5&3.0T1.94
52/1.	[1]	146420-0300	SHIM D9.5&3.0T1.96
52/1.	[1]	146420-0400	SHIM D9.5&3.0T1.98
52/1.	[1]	146420-0500	SHIM D9.5&3.0T2.00
52/1.	[1]	146420-0600	SHIM D9.5&3.0T2.02
52/1.	[1]	146420-0700	SHIM D9.5&3.0T2.04
52/1.	[1]	146420-0800	SHIM D9.5&3.0T2.06
52/1.	[1]	146420-0900	SHIM D9.5&3.0T2.08
52/1.	[1]	146420-1000	SHIM D9.5&3.0T2.10
52/1.	[1]	146420-1100	SHIM D9.5&3.0T2.12
52/1.	[1]	146420-1200	SHIM D9.5&3.0T2.14
52/1.	[1]	146420-1300	SHIM D9.5&3.0T2.16
52/1.	[1]	146420-1400	SHIM D9.5&3.0T2.18
52/1.	[1]	146420-1500	SHIM D9.5&3.0T2.20
52/1.	[1]	146420-1600	SHIM D9.5&3.0T2.22
52/1.	[1]	146420-1700	SHIM D9.5&3.0T2.24
52/1.	[1]	146420-1800	SHIM D9.5&3.0T2.26
52/1.	[1]	146420-1900	SHIM D9.5&3.0T2.28
52/1.	[1]	146420-2000	SHIM D9.5&3.0T2.30
52/1.	[1]	146420-2100	SHIM D9.5&3.0T2.32
52/1.	[1]	146420-2200	SHIM D9.5&3.0T2.34
52/1.	[1]	146420-2300	SHIM D9.5&3.0T2.36
52/1.	[1]	146420-2400	SHIM D9.5&3.0T2.38
52/1.	[1]	146420-2500	SHIM D9.5&3.0T2.40
52/1.	[1]	146420-2600	SHIM D9.5&3.0T2.42
52/1.	[1]	146420-2700	SHIM D9.5&3.0T2.44
52/1.	[1]	146420-2800	SHIM D9.5&3.0T2.46
52/1.	[1]	146420-2900	SHIM D9.5&3.0T2.48
52/1.	[1]	146420-3000	SHIM D9.5&3.0T2.50
52/1.	[1]	146420-3100	SHIM D9.5&3.0T2.52
52/1.	[1]	146420-3200	SHIM D9.5&3.0T2.54
52/1.	[1]	146420-3300	SHIM D9.5&3.0T2.56
52/1.	[1]	146420-3400	SHIM D9.5&3.0T2.58
52/1.	[1]	146420-3500	SHIM D9.5&3.0T2.60
52/1.	[1]	146420-3600	SHIM D9.5&3.0T2.62
52/1.	[1]	146420-3700	SHIM D9.5&3.0T2.64
52/1.	[1]	146420-3800	SHIM D9.5&3.0T2.66
52/1.	[1]	146420-3900	SHIM D9.5&3.0T2.68
52/1.	[1]	146420-4000	SHIM D9.5&3.0T2.70
52/1.	[1]	146420-4100	SHIM D9.5&3.0T2.72
52/1.	[1]	146420-4200	SHIM D9.5&3.0T2.74
52/1.	[1]	146420-4300	SHIM D9.5&3.0T2.76
52/1.	[1]	146420-4400	SHIM D9.5&3.0T2.78
52/1.	[1]	146420-4500	SHIM D9.5&3.0T2.80
52/1.	[1]	146420-4600	SHIM D9.5&3.0T2.82
52/1.	[1]	146420-4700	SHIM D9.5&3.0T2.84
52/1.	[1]	146420-4800	SHIM D9.5&3.0T2.86
52/1.	[1]	146420-4900	SHIM D9.5&3.0T2.88
52/1.	[1]	146420-5000	SHIM D9.5&3.0T2.90
52/1.	[1]	146420-5100	SHIM D9.5&3.0T1.74
52/1.	[1]	146420-5200	SHIM D9.5&3.0T1.76
52/1.	[1]	146420-5300	SHIM D9.5&3.0T1.78
52/1.	[1]	146420-5400	SHIM D9.5&3.0T1.80
52/1.	[1]	146420-5500	SHIM D9.5&3.0T1.82
52/1.	[1]	146420-5600	SHIM D9.5&3.0T1.84
52/1.	[1]	146420-5700	SHIM D9.5&3.0T1.86
52/1.	[1]	146420-5800	SHIM D9.5&3.0T1.88
54.	[4]	146433-0100	GASKET D12&6.4T1.00
55.	[4]	146430-0120	DELIVERY-VALVE ASSEMBLY
56.	[4]	146432-0000	COMPRESSION SPRING
58.	[4]	146440-0220	FITTING
60.	[3]	139106-0100	FLAT-HEAD SCREW
67.	[1]	146820-1120	GOVERNOR COVER
67/1.	[1]	146805-5020	GOVERNOR COVER
67/2.	[1]	146515-2520	CONTROL SHAFT
67/3.	[1]	146600-0100	O-RING
67/4.	[1]	139310-0200	PLAIN WASHER
67/5.	[1]	146535-5120	CONTROL LEVER
67/5B.	[1]	146535-5220	CONTROL LEVER
67/6.	[1]	014110-6440	LOCKING WASHER
67/7.	[1]	013020-6040	UNION NUT M6P1H5
67/13.	[1]	146621-1700	UNION NUT
67/14.	[1]	146621-1700	UNION NUT
67/15.	[1]	146526-2800	BLEEDER SCREW
67/16.	[1]	146526-2800	BLEEDER SCREW
67/18.	[1]	146587-8600	COILED SPRING
67/19.	[1]	146541-3000	BUSHING
67/21.	[1]	146587-2400	COILED SPRING
67/22.	[1]	146541-3100	SLOTTED WASHER
67/28.	[1]	146541-1600	BUSHING
67/78.	[1]	146600-1000	SEAL RING
67/200.	[1]	139308-0300	PLAIN WASHER
67/201.	[1]	146545-3400	THREADED PIN L53.00
67/201B.	[1]	146545-3500	THREADED PIN L55.00
67/201C.	[1]	146545-3600	THREADED PIN L57.00
67/202.	[1]	139208-0900	UNION NUT
67/203.	[1]	146600-1200	O-RING
95.	[1]	146551-0520	FULCRUM LEVER
104.	[2]	146568-0000	SLOTTED SPRING PIN
105.	[2]	026508-1140	GASKET D11.4&8.2T1
106.	[2]	146588-0500	COILED SPRING
107.	[1]	146569-0300	UNION NUT
108.	[1]	146570-0100	GOVERNOR SHAFT
109.	[1]	146600-0400	O-RING
110/1.	[1]	146571-0000	SHIM D20.2&8.3T1.05
110/1.	[1]	146571-0100	SHIM D20.2&8.3T1.25
110/1.	[1]	146571-0200	SHIM D20.2&8.3T1.45
110/1.	[1]	146571-0300	SHIM D20.2&8.3T1.65
110/1.	[1]	146571-0400	SHIM D20.2&8.3T1.85
110/1.	[1]	146571-0500	SHIM D20.2&8.3T1.15
110/1.	[1]	146571-0600	SHIM D20.2&8.3T1.35
110/1.	[1]	146571-0700	SHIM D20.2&8.3T1.55
110/1.	[1]	146571-0800	SHIM D20.2&8.3T1.75
111.	[1]	146602-0600	PLAIN WASHER D20&8.4T1.40
112.	[1]	146572-0020	FLYWEIGHT ASSEMBLY
114.	[1]	146602-0500	PLAIN WASHER D17&6.4T1.60
115.	[1]	146575-0000	SLIDING SLEEVE
116.	[1]	146576-0000	SEALING CAP
117/1.	[1]	146577-0000	PLUG L1.70
117/1.	[1]	146577-0100	PLUG L1.90
117/1.	[1]	146577-0200	PLUG L2.10
117/1.	[1]	146577-0300	PLUG L2.30
117/1.	[1]	146577-0400	PLUG L2.50
117/1.	[1]	146577-0500	PLUG L2.70
117/1.	[1]	146577-0600	PLUG L2.90
117/1.	[1]	146577-0700	PLUG L3.10
117/1.	[1]	146577-0800	PLUG L3.30
117/1.	[1]	146577-0900	PLUG L3.50
117/1.	[1]	146577-1000	PLUG L3.70
117/1.	[1]	146577-1100	PLUG L3.90
117/1.	[1]	146577-1200	PLUG L4.10
117/1.	[1]	146577-1300	PLUG L4.30
117/1.	[1]	146577-1400	PLUG L4.50
117/1.	[1]	146577-1500	PLUG L4.70
117/1.	[1]	146577-1600	PLUG L4.90
117/1.	[1]	146577-1700	PLUG L5.10
117/1.	[1]	146577-5000	PLUG L1.8
117/1.	[1]	146577-5100	PLUG L2.0
117/1.	[1]	146577-5200	PLUG L2.2
117/1.	[1]	146577-5300	PLUG L2.4
117/1.	[1]	146577-5400	PLUG L2.6
117/1.	[1]	146577-5500	PLUG L2.8
117/1.	[1]	146577-5600	PLUG L3.0
117/1.	[1]	146577-5700	PLUG L3.2
117/1.	[1]	146577-5800	PLUG L3.4
117/1.	[1]	146577-5900	PLUG L3.6
117/1.	[1]	146577-6000	PLUG L3.8
117/1.	[1]	146577-6100	PLUG L4.0
117/1.	[1]	146577-6200	PLUG L4.2
117/1.	[1]	146577-6300	PLUG L4.4
117/1.	[1]	146577-6400	PLUG L4.6
117/1.	[1]	146577-6500	PLUG L4.8
117/1.	[1]	146577-6600	PLUG L5.0
117/1.	[1]	146877-0400	PLUG
117/1.	[1]	146877-0500	PLUG
117/1.	[1]	146877-0600	PLUG
117/1.	[1]	146877-0700	PLUG
117/1.	[1]	146877-4300	PLUG
117/1.	[1]	146877-4400	PLUG
117/1.	[1]	146877-4500	PLUG
117/1.	[1]	146877-4600	PLUG
121.	[1]	146579-5020	RETAINING PIN
122.	[1]	146580-1100	GOVERNOR SPRING
123.	[4]	139106-0200	FLAT-HEAD SCREW
130.	[1]	146421-0020	CAPSULE
130/2.	[1]	026508-1140	GASKET D11.4&8.2T1
130/3.	[1]	146422-0000	BLEEDER SCREW
130/4.	[1]	146600-0500	O-RING
133.	[1]	146600-0600	O-RING
134.	[1]	146600-0700	O-RING
135.	[1]	146110-1820	CONTROL VALVE
135/5.	[1]	146114-0000	SPRING WASHER
136.	[1]	146650-4020	PULLING ELECTROMAGNET
137.	[2]	139514-0200	GASKET
145.	[1]	146621-1000	UNION NUT
147.	[1]	016520-1210	O-RING
200.	[1]	146206-0100	COILED SPRING
223.	[1]	146671-0020	SWITCH
225.	[1]	146928-8800	BRACKET
227.	[2]	020105-0940	BLEEDER SCREW
230.	[1]	146928-4920	BRACKET
236.	[1]	139006-4800	BLEEDER SCREW
237.	[1]	146620-0200	HEX-SOCKET-HEAD CAP SCREW
240.	[1]	146650-1320	PULLING ELECTROMAGNET
240/8.	[1]	146600-1700	O-RING
243.	[1]	146621-1000	UNION NUT
244.	[1]	020118-1440	BLEEDER SCREW
245.	[2]	026512-1840	GASKET D17.9&12.2T1.50
246.	[1]	027412-2440	EYE BOLT
247.	[1]	146665-2320	PIPE
251.	[1]	014010-8140	PLAIN WASHER D18&8.5T1.6
307.	[1]	146310-2301	CAP
800S.	[1]	146019-9820	PUMP HOUSING
800S/1/6.	[1]	146601-0900	PACKING RING
804S.	[1]	146232-0220	COMPRESSION SPRING
805S.	[1]	146574-0120	PARTS SET
810S.	[1]	146600-1120	REPAIR SET
813S.	[1]	146600-3120	PARTS SET
835S.	[1]	146598-1000	CAP
836S/1.	[1]	146598-0600	CAP L18
836S/1.	[1]	146598-0700	CAP L21
836S/1.	[1]	146598-0800	CAP L24
836S/1.	[1]	146598-0900	CAP L27
906.	[1]	146950-8400	NAMEPLATE

Include in #2:

104741-4131 as INJECTION-PUMP ASSEMBLY

Cross reference number

BOSCH 9 460 612 962 9460612962

ZEXEL 104741-4131 1047414131

NISSAN 1670056T01 1670056t01

Zexel num

Bosch num

Firm num

Name

104741-4131
104741-4132

9 460 612 962

1670056T01 NISSAN

INJECTION-PUMP ASSEMBLY
ED3 * K

104741-4131
104741-4132

9 460 612 962

1670056T01 NISSAN-DIESEL

INJECTION-PUMP ASSEMBLY
ED3 * K

Calibration Data:

Adjustment conditions

Test oil
1404 Test oil ISO4113orSAEJ967d

Test oil temperature degC 45 45 50

Nozzle 105780-0060

Bosch type code NP-DN0SD1510

Nozzle holder 105780-2150

Opening pressure MPa 13 13 13.3

Opening pressure kgf/cm2 133 133 136

Injection pipe 157805-7320

Injection pipe
Inside diameter - outside diameter - length (mm) mm 2-6-450

Joint assembly 157641-4720

Tube assembly 157641-4020

Transfer pump pressure kPa 20 20 20

Transfer pump pressure kgf/cm2 0.2 0.2 0.2

Direction of rotation (viewed from drive side)
Right R

Injection timing adjustment

Pump speed r/min 1000 1000 1000

Average injection quantity mm3/st. 60.1 59.6 60.6

Difference in delivery mm3/st. 5

Basic *

Injection timing adjustment_02

Pump speed r/min 2000 2000 2000

Average injection quantity mm3/st. 27 23.5 30.5

Injection timing adjustment_03

Pump speed r/min 1750 1750 1750

Average injection quantity mm3/st. 57.5 54 61

Injection timing adjustment_04

Pump speed r/min 1000 1000 1000

Average injection quantity mm3/st. 60.1 59.1 61.1

Injection timing adjustment_05

Pump speed r/min 600 600 600

Average injection quantity mm3/st. 59.6 56.1 63.1

Injection quantity adjustment

Pump speed r/min 2000 2000 2000

Average injection quantity mm3/st. 27 24 30

Difference in delivery mm3/st. 8

Basic *

Injection quantity adjustment_02

Pump speed r/min 2200 2200 2200

Average injection quantity mm3/st. 5

Governor adjustment

Pump speed r/min 325 325 325

Average injection quantity mm3/st. 13.7 11.7 15.7

Difference in delivery mm3/st. 3

Basic *

Governor adjustment_02

Pump speed r/min 450 450 450

Average injection quantity mm3/st. 3

Governor adjustment_03

Pump speed r/min 325 325 325

Average injection quantity mm3/st. 13.7 11.7 15.7

Timer adjustment

Pump speed r/min 100 100 100

Average injection quantity mm3/st. 88 73 103

Basic *

Speed control lever angle

Pump speed r/min 300 300 300

Average injection quantity mm3/st. 0 0 0

Remarks
Magnet OFF

0000000901

Pump speed r/min 1125 1125 1125

Overflow quantity with S/T ON cm3/min 309 180 438

Stop lever angle

Pump speed r/min 1125 1125 1125

Pressure with S/T ON kPa 333.5 294 373

Pressure with S/T ON kgf/cm2 3.4 3 3.8

Pressure with S/T OFF kPa 274.5 235 314

Pressure with S/T OFF kgf/cm2 2.8 2.4 3.2

Basic *

Stop lever angle_02

Pump speed r/min 1125 1125 1125

Pressure with S/T ON kPa 333.5 294 373

Pressure with S/T ON kgf/cm2 3.4 3 3.8

Pressure with S/T OFF kPa 274.5 235 314

Pressure with S/T OFF kgf/cm2 2.8 2.4 3.2

Stop lever angle_03

Pump speed r/min 1500 1500 1500

Pressure with S/T OFF kPa 333.5 255 412

Pressure with S/T OFF kgf/cm2 3.4 2.6 4.2

Stop lever angle_04

Pump speed r/min 1850 1850 1850

Pressure with S/T OFF kPa 431.5 353 510

Pressure with S/T OFF kgf/cm2 4.4 3.6 5.2

0000001101

Pump speed r/min 1125 1125 1125

Timer stroke with S/T OFF mm 0.7 0.1 1.3

Basic *

Remarks
Adjust Pt pressure.

_02

Pump speed r/min 1500 1500 1500

Timer stroke with S/T OFF mm 2.8 2.6 3

Basic *

Remarks
Adjust set force.

_03

Pump speed r/min 900 900 900

Timer stroke with S/T ON mm 1.7 0.9 2.5

_04

Pump speed r/min 1125 1125 1125

Timer stroke with S/T OFF mm 0.7 0 1.4

_05

Pump speed r/min 1300 1300 1300

Timer stroke with S/T OFF mm 1.7 0.9 2.5

_06

Pump speed r/min 1500 1500 1500

Timer stroke with S/T OFF mm 2.8 2.5 3.1

_07

Pump speed r/min 1750 1750 1750

Timer stroke with S/T OFF mm 4.85 4.2 5.5

_08

Pump speed r/min 1850 1850 1850

Timer stroke with S/T OFF mm 4.8 4.3 5.3

0000001201

Max. applied voltage V 16 16 16

Test voltage V 25 24 26

Timing setting

K dimension mm 3.3 3.2 3.4

KF dimension mm 5.8 5.7 5.9

MS dimension mm 1.1 1 1.2

Control lever angle alpha deg. 25 21 29

Control lever angle beta deg. 36 31 41

Test data Ex:

0000001801 MICROSWITCH ADJUSTMENT

Microswitch adjustment (A) Microswitch (B) Idle set screw (C) Control lever (D) block gauge (E) adjusting screw (f) Pin (1)Insert a block gauge thickness L between the idle setscrew and the control lever. (2)Set the microswitch adjusting screw so that the switch turns from ON to OFF.
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L=3.3mm
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0000001901 SUPPLY PUMP-TIMING DEVICE ADJ

Pump chamber pressure PT, timer stroke TA adjustment procedure Adjust the sequence in accordance with the procedure below. 1. At N = N1 set PT lower limit at P1. 2. At N = N2, set so that TA lower limit is TA1. 3. At N = N1 tap the regulating valve so that the timer's minimum specifications are obtained. 4. Reconfirm timer specifications for N = N2. (1)If as specified, confirm timer operation at N = N3. (2)If not as specified: 1) Readjust the timer at N = N2. (Adjust using the outer adjustable type). 2) Confirm timer operation at N = N1, N = N2. 5. Seal after completing adjustment. T:Tightening torque (A) = nut (B) = sealing wire
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N1=1125r/min N2=1500r/min N3=1850r/min P1=235kPa(2.4kgf/cm2) TA1=2.6mm
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T1=7~10N-m(0.7~1.0kgf-m)

Information:

Cooling System
The centrifugal-type water pump mounts on the front cover and is belt driven by the crankshaft pulley. The pump has two outlets. Coolant from the outlet on the right side of the pump flows through a passage in the front cover to the left bank of the engine, and coolant from the outlet on the left flows to the right bank.The coolant circulates through the block to the cylinder head. Coolant flows from the heads through connecting sleeves to the return manifold in the front cover. Orifices in the sleeves control the flow from the heads.Part of the coolant to the left bank is diverted from the block to the oil cooler. External lines direct coolant from the block to the cooler and back to the return manifold in the front cover.An internal passage in the front cover directs the coolant from the return manifold to the water pump inlet. If the thermostats are closed the coolant flows to the pump and is recirculated through the engine. If they are open, coolant flows from the return manifold to the radiator and from there to the pump.The radiator is constructed with a top tank above the core and an expansion tank either above or separate from the top tank. A vent tube connects the radiator top tank and the expansion tank. The expansion tank has a shunt line which connects to the water pump inlet. This shunt system maintains a positive, static head of coolant at the pump inlet to prevent cavitation under all operating conditions. When filling the cooling system, coolant from the expansion tank flows through the shunt line to the water pump inlet and fills the engine block from the bottom. By filling the system from the bottom, air in the system is forced out through the top tank, through the vent tube into the expansion tank.The two thermostats are located at the inlet to the water pump. The inlet-regulated cooling system maintains positive coolant temperature control with decreased engine warm up time.When the thermostats are closed, coolant is circulated through the block and heads and back to the water pump by way of an internal passage in the front cover. When the thermostats are open, the bypass flow is restricted and the engine coolant flows through the radiator and returns through the inlet elbow to the water pump. Without the thermostats installed, the coolant will continually bypass the radiator, and overheating will result.Electrical System
The electrical system is a combination of three separate electric circuits: the charging circuit, the starting circuit and the lighting or load circuit. Each circuit is dependent on some of the same components. The battery (batteries), disconnect switch, circuit breaker, ammeter, cables and wires from the battery are common in each of the circuits.The charging circuit is in operation when the engine is operating. The electricity producing (charging) unit is an alternator. A regulator in the circuit senses the state of charge in the battery and regulates the electrical output to