104746-5630 ZEXEL 9 460 614 873 BOSCH INJECTION-PUMP ASSEMBLY 9460614873 1047465630 8973795820

Information Cross number Calibration Data Calibration Data Ex

Information injection-pump assembly

BOSCH 9 460 614 873 9460614873

ZEXEL 104746-5630 1047465630

ISUZU 8973795820 8973795820

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Buy INJECTION-PUMP ASSEMBLY 104746-5630 zexel genuine, new aftermarket engine parts with delivery

Components :

0.	INJECTION-PUMP ASSEMBLY	104746-5630
1.	_
2.	FUEL INJECTION PUMP	104646-5200
3.	NUMBER PLATE
4.	_
5.	CAPSULE
6.	ADJUSTING DEVICE
7.	NOZZLE AND HOLDER ASSY	105118-6532
8.	Nozzle and Holder
9.	Open Pre:MPa(Kqf/cm2)	18.1(185)
10.	NOZZLE-HOLDER	105048-3230
11.	NOZZLE	105017-2280

Scheme ###:

1/6.	[1]	146601-0700	PACKING RING
6.	[1]	146100-0120	SUPPLY PUMP
9.	[1]	146103-0000	COVER
10.	[2]	139104-0000	FLAT-HEAD SCREW
12.	[1]	146200-0820	DRIVE SHAFT
12/1.	[1]	146200-0800	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]	146210-1720	ROLLER SET
24.	[1]	146303-0000	BEARING PIN
25.	[1]	146304-0000	BEARING PIN
26.	[1]	146305-0000	CLAMPING BAND
27.	[1]	146205-0100	SLOTTED WASHER
29.	[1]	146220-2020	CAM PLATE
30.	[1]	146600-0800	O-RING
31.	[1]	146300-4000	PUMP PLUNGER
32.	[1]	146301-0000	SLIDING PIECE
33.	[1]	146603-0700	SHIM D17.5&7.5T0.60
34.	[1]	146302-3500	COMPRESSION SPRING
34B.	[1]	146302-3400	COMPRESSION SPRING
34C.	[1]	146302-3600	COMPRESSION SPRING
35/1.	[0]	146603-0700	SHIM D17.5&7.5T0.60
35/1.	[0]	146603-0800	SHIM D17.5&7.5T0.70
35/1.	[0]	146603-0900	SHIM D17.5&7.5T0.90
35/1.	[0]	146603-1000	SHIM D17.5&7.5T1.00
35/1.	[0]	146603-1100	SHIM D17.5&7.5T1.20
35/1.	[0]	146603-3600	SHIM D17.5&7.5T2.40
36.	[1]	146600-0800	O-RING
37.	[1]	146310-0700	COVER
38.	[2]	146620-5000	BLEEDER SCREW
39.	[1]	146310-5100	COVER
40.	[2]	146620-5000	BLEEDER SCREW
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 D17&5.2T2.1
48/1.	[1]	146690-5900	SHIM D17&5.2T2.2
48/1.	[1]	146690-6000	SHIM D17&5.2T2.3
48/1.	[1]	146690-6100	SHIM D17&5.2T2.4
48/1.	[1]	146690-6200	SHIM D17&5.2T2.5
48/1.	[1]	146690-6300	SHIM D17&5.2T2.6
48/1.	[1]	146690-6400	SHIM D17&5.2T2.7
48/1.	[1]	146690-6500	SHIM D17&5.2T2.8
48/1.	[1]	146690-6600	SHIM D17&5.2T2.9
48/1.	[1]	146690-6700	SHIM D17&5.2T3.0
48/1.	[1]	146690-6800	SHIM D17&5.2T3.1
48/1.	[1]	146690-6900	SHIM D17&5.2T3.2
48/1.	[1]	146690-7000	SHIM D17&5.2T3.3
48/1.	[1]	146690-7100	SHIM D17&5.2T3.4
48/1.	[1]	146690-7200	SHIM D17&5.2T0.4
48/1.	[1]	146690-7300	SHIM D17&5.2T0.6
48/1.	[1]	146690-7400	SHIM D17&5.2T0.7
48/1.	[1]	146690-7500	SHIM D17&5.2T1.9
48/1.	[1]	146690-7800	SHIM D17&5.2T0.2
49.	[2]	146234-0600	GUIDE PIN
50.	[1]	146402-3820	HYDRAULIC HEAD
50.	[1]	146402-3820	HYDRAULIC HEAD
50.	[1]	146402-3820	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]	146430-1420	DELIVERY-VALVE ASSEMBLY
56.	[4]	146432-0200	COMPRESSION SPRING
58.	[4]	146440-1520	FITTING
60.	[4]	139106-0100	FLAT-HEAD SCREW
67.	[1]	146821-5820	GOVERNOR COVER
67/1.	[1]	146508-6821	GOVERNOR COVER
67/2.	[1]	146515-2520	CONTROL SHAFT
67/3.	[1]	146600-0100	O-RING
67/4.	[1]	139310-0200	PLAIN WASHER
67/13.	[1]	013020-6040	UNION NUT M6P1H5
67/14.	[1]	146621-1700	UNION NUT
67/15.	[1]	146526-2800	BLEEDER SCREW
67/16.	[1]	146526-2800	BLEEDER SCREW
67/23.	[1]	146628-9201	BRACKET
67/24.	[2]	139006-4500	BLEEDER SCREW
67/26.	[1]	146932-2900	BRACKET
67/78.	[1]	146600-4400	SEAL RING
67/98.	[1]	139006-4500	BLEEDER SCREW
67/100.	[1]	146628-9000	BRACKET
67/102.	[1]	146629-5920	BRACKET
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
72.	[1]	146832-6920	CONTROL LEVER
72B.	[1]	146832-7020	CONTROL LEVER
72C.	[1]	146832-7120	CONTROL LEVER
72D.	[1]	146832-7220	CONTROL LEVER
73.	[1]	014110-6440	LOCKING WASHER
75.	[1]	013020-6040	UNION NUT M6P1H5
95.	[1]	146865-9920	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]	146975-4200	SLIDING SLEEVE
116.	[1]	146576-0200	CAP
117/1.	[1]	146577-1800	PLUG L2.10
117/1.	[1]	146577-1900	PLUG L2.30
117/1.	[1]	146577-2000	PLUG L2.50
117/1.	[1]	146577-2100	PLUG L2.70
117/1.	[1]	146577-2200	PLUG L2.90
117/1.	[1]	146577-2300	PLUG L3.10
117/1.	[1]	146577-2400	PLUG L3.30
117/1.	[1]	146577-2500	PLUG L3.50
117/1.	[1]	146577-2600	PLUG L3.70
117/1.	[1]	146577-2700	PLUG L3.90
117/1.	[1]	146577-2800	PLUG L4.10
117/1.	[1]	146577-2900	PLUG L4.30
117/1.	[1]	146577-3000	PLUG L4.50
117/1.	[1]	146577-3100	PLUG L4.70
117/1.	[1]	146577-3200	PLUG L4.90
117/1.	[1]	146577-3300	PLUG L5.10
117/1.	[1]	146577-6700	PLUG L2.2
117/1.	[1]	146577-6800	PLUG L2.4
117/1.	[1]	146577-6900	PLUG L2.6
117/1.	[1]	146577-7000	PLUG L2.8
117/1.	[1]	146577-7100	PLUG L3.0
117/1.	[1]	146577-7200	PLUG L3.2
117/1.	[1]	146577-7300	PLUG L3.4
117/1.	[1]	146577-7400	PLUG L3.6
117/1.	[1]	146577-7500	PLUG L3.8
117/1.	[1]	146577-7600	PLUG L4.0
117/1.	[1]	146577-7700	PLUG L4.2
117/1.	[1]	146577-7800	PLUG L4.4
117/1.	[1]	146577-7900	PLUG L4.6
117/1.	[1]	146577-8000	PLUG L4.8
117/1.	[1]	146577-8100	PLUG L5.0
117/1.	[1]	146877-0000	PLUG L5.2
117/1.	[1]	146877-0100	PLUG L5.3
117/1.	[1]	146877-0200	PLUG L5.4
117/1.	[1]	146877-0300	PLUG L5.5
117/1.	[1]	146877-4700	PLUG
117/1.	[1]	146877-4800	PLUG
117/1.	[1]	146877-4900	PLUG
117/1.	[1]	146877-5000	PLUG
120.	[1]	146579-2920	RETAINING PIN
122.	[1]	146580-3300	GOVERNOR SPRING
123.	[4]	139106-0200	FLAT-HEAD SCREW
130.	[1]	146421-0320	CAPSULE
130/2.	[1]	026508-1140	GASKET D11.4&8.2T1
130/3.	[1]	146422-0300	BLEEDER SCREW
130/4.	[1]	146600-0500	O-RING
133.	[1]	146600-0600	O-RING
134.	[1]	146600-0700	O-RING
135.	[1]	146110-0720	CONTROL VALVE
135/5.	[1]	146114-0000	SPRING WASHER
136.	[1]	146120-1520	OVER FLOW VALVE
137.	[2]	139512-0500	GASKET
138.	[1]	146605-5820	INLET UNION
159.	[1]	146628-7220	PLATE
160.	[1]	146625-8020	PLATE
205.	[1]	029470-4030	WOODRUFF KEY
220.	[1]	146594-0500	COILED SPRING
240.	[1]	146650-1220	PULLING ELECTROMAGNET
240/8.	[1]	146600-1700	O-RING
242.	[1]	146658-7320	WIRE
243.	[1]	146621-4901	UNION NUT
245.	[2]	139512-0500	GASKET
246.	[1]	027412-2440	EYE BOLT
247.	[1]	146609-4620	INLET UNION
260.	[1]	146611-0720	BRACKET
261.	[2]	146621-4700	UNION NUT
264.	[1]	016500-5010	O-RING
800S.	[1]	146009-9420	PUMP HOUSING
800S/1/6.	[1]	146601-0700	PACKING RING
804S.	[1]	146232-0720	COMPRESSION SPRING
805S.	[1]	146574-0120	PARTS SET
810S.	[1]	146600-1120	REPAIR SET
821S.	[1]	146210-5720	ROLLER 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
903.	[1]	146620-0120	CAPSULE
903/2.	[1]	146600-1300	O-RING &13W1.9
906.	[1]	146979-2500	NAMEPLATE

Include in #2:

104746-5630 as INJECTION-PUMP ASSEMBLY

Cross reference number

BOSCH 9 460 614 873 9460614873

ZEXEL 104746-5630 1047465630

ISUZU 8973795820 8973795820

Zexel num

Bosch num

Firm num

Name

104746-5630
104746-5631

9 460 614 873

8973795820 ISUZU

INJECTION-PUMP ASSEMBLY
4JA1 * 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)
Left L

Injection timing adjustment

Pump speed r/min 1150 1150 1150

Average injection quantity mm3/st. 55.1 54.6 55.6

Difference in delivery mm3/st. 4.5

Basic *

Oil temperature degC 50 48 52

Injection timing adjustment_02

Pump speed r/min 500 500 500

Average injection quantity mm3/st. 33.4 29.4 37.4

Oil temperature degC 48 46 50

Injection timing adjustment_03

Pump speed r/min 750 750 750

Average injection quantity mm3/st. 40.8 36.8 44.8

Oil temperature degC 50 48 52

Injection timing adjustment_04

Pump speed r/min 1150 1150 1150

Average injection quantity mm3/st. 55.1 54.1 56.1

Difference in delivery mm3/st. 4.5

Basic *

Oil temperature degC 50 48 52

Injection timing adjustment_05

Pump speed r/min 2000 2000 2000

Average injection quantity mm3/st. 60.8 56.3 65.3

Oil temperature degC 50 48 52

Injection quantity adjustment

Pump speed r/min 2350 2350 2350

Average injection quantity mm3/st. 26 23 29

Difference in delivery mm3/st. 6

Basic *

Oil temperature degC 52 50 54

Injection quantity adjustment_02

Pump speed r/min 2700 2700 2700

Average injection quantity mm3/st. 5

Oil temperature degC 55 52 58

Injection quantity adjustment_03

Pump speed r/min 2350 2350 2350

Average injection quantity mm3/st. 26 23 29

Difference in delivery mm3/st. 6

Basic *

Oil temperature degC 52 50 54

Governor adjustment

Pump speed r/min 385 385 385

Average injection quantity mm3/st. 8.6 6.6 10.6

Difference in delivery mm3/st. 2

Basic *

Oil temperature degC 48 46 50

Governor adjustment_02

Pump speed r/min 385 385 385

Average injection quantity mm3/st. 8.6 6.6 10.6

Difference in delivery mm3/st. 2

Basic *

Oil temperature degC 48 46 50

Timer adjustment

Pump speed r/min 100 100 100

Average injection quantity mm3/st. 60 60 100

Basic *

Oil temperature degC 48 46 50

Remarks
Full

Timer adjustment_02

Pump speed r/min 100 100 100

Average injection quantity mm3/st. 60 60 100

Oil temperature degC 48 46 50

Remarks
Full

Speed control lever angle

Pump speed r/min 385 385 385

Average injection quantity mm3/st. 0 0 0

Oil temperature degC 48 46 50

Remarks
Magnet OFF at idling position

0000000901

Pump speed r/min 1500 1500 1500

Overflow quantity cm3/min 630 500 760

Oil temperature degC 50 48 52

Stop lever angle

Pump speed r/min 1500 1500 1500

Pressure kPa 412 392 432

Pressure kgf/cm2 4.2 4 4.4

Basic *

Oil temperature degC 50 48 52

Stop lever angle_02

Pump speed r/min 1500 1500 1500

Pressure kPa 412 392 432

Pressure kgf/cm2 4.2 4 4.4

Basic *

Oil temperature degC 50 48 52

0000001101

Pump speed r/min 1500 1500 1500

Timer stroke mm 2.7 2.5 2.9

Basic *

Oil temperature degC 50 48 52

_02

Pump speed r/min 1000 1000 1000

Timer stroke mm 0.5

Oil temperature degC 50 48 52

_03

Pump speed r/min 1500 1500 1500

Timer stroke mm 2.7 2.5 2.9

Basic *

Oil temperature degC 50 48 52

_04

Pump speed r/min 1700 1700 1700

Timer stroke mm 3.9 3.5 4.3

Oil temperature degC 50 48 52

_05

Pump speed r/min 2050 2050 2050

Timer stroke mm 5.3 5 5.7

Oil temperature degC 52 50 54

0000001201

Max. applied voltage V 8 8 8

Test voltage V 13 12 14

Timing setting

K dimension mm 3.1 3 3.2

KF dimension mm 5.5 5.4 5.6

MS dimension mm 0.8 0.7 0.9

Pre-stroke mm 0.45 0.43 0.47

Control lever angle alpha deg. 18 14 22

Control lever angle beta deg. 39 34 44

Information:

PRESSURIZING THE SYSTEMIf the pressure isn't maintained, overflow loss can occur as cooling system temperature rises. Do not remove the cap while the system is at operating temperature. Check coolant level only when cold.If the system does not hold pressure, find the leak.Carefully inspect the radiator cap, seals, sealing surfaces and the top tank filler neck surface for damage.
RADIATOR CAPTesting The Temperature Gauge
Remember that boiling point temperature and pressure go hand-in-hand and neither one can be tested logically without considering the other. For example, the effect of pressurization and altitude on the boiling point of water is shown in the chart. If overheating and loss of coolant is a problem, a pressure loss in the system could be the cause. If an overheating condition is indicated on the temperature gauge and loss of coolant is not evident, check the accuracy of the temperature gauge. Make this check by installing a thermometer with a suitable bushing into the cylinder head.Start the engine. Partially cover the radiator to reduce air flow and cooling. The reading on the instrument panel gauge should agree with the reading on the thermometer.
Use CAUTION when working around moving parts with the engine running.
CHECKING COOLANT TEMPERATURE WITH THERMOMETERTemperature Regulators
There is a temperature regulator located at the front of each cylinder head.The opening temperature of the regulator (bench test in antmospheric pressure) should be 180 2°F (82 2°C). The regulator should be fully open at approximately 197°F (92°C). 1. Remove the regulator from the housing.2. Submerge the regulator and a thermometer in a pan of water as shown.3. Apply heat to the pan and stir the water to maintain uniformity.4. Observe the opening temperature of the regulator.If the regulator does not operate correctly, install a new one. Cooling System Hoses
Inspect all coolant hoses annually and replace if they show signs of cracking or leaking. Periodically replace all hoses, as it is many times difficult to determine the condition of a water hose by visual inspection and feel. Coolant hoses are expendable items and periodic replacement is considered good maintenance practice.Air, Gases And Steam In The System
Incomplete or improper filling is a major cause of air in the cooling system. Also, leaks in various components such as the aftercooler, and hoses allow air to enter the cooling system, especially on the inlet side of the water pump.Air in the system produces foaming or aeration and affects water pump performance. The air bubbles insulate various parts of the engine from the coolant, and hot spots form. As the air bubbles circulate or break up, coolant contacts the hot surfaces, creating steam. The steam pockets have basically the same effect as air bubbles, accelerating the formation of more steam. Consequently, coolant discharges through the overflow.Exhaust gas leakage into the system causes similar conditions. Exhaust gas can enter through internal cracks or defective cylinder head gaskets.Most of the causes can be checked by a visual inspection, while others require disassembly or a simple test.Air in the cooling system is