104741-8020 ZEXEL 9 460 614 825 BOSCH INJECTION-PUMP ASSEMBLY 9460614825 1047418020 32a6500390


 

Information injection-pump assembly

BOSCH 9 460 614 825 9460614825
ZEXEL 104741-8020 1047418020
MITSUBISHI-HEAV 32A6500390 32a6500390
104741-8020 INJECTION-PUMP ASSEMBLY
Rating:
10
Buy INJECTION-PUMP ASSEMBLY 104741-8020 zexel genuine, new aftermarket engine parts with delivery

Components :

0. INJECTION-PUMP ASSEMBLY 104741-8020
1. _
2. FUEL INJECTION PUMP 104641-8020
3. NUMBER PLATE 146989-9100
4. _
5. CAPSULE
6. ADJUSTING DEVICE
7. NOZZLE AND HOLDER ASSY
8. Nozzle and Holder
9. Open Pre:MPa(Kqf/cm2)
10. NOZZLE-HOLDER
11. NOZZLE

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] 146220-4820 CAM PLATE
30. [1] 146600-0800 O-RING
31. [1] 146311-5420 PUMP PLUNGER
32. [1] 146301-0000 SLIDING PIECE
34. [1] 146312-6300 COMPRESSION SPRING
34B. [1] 146312-6200 COMPRESSION SPRING
35/1. [1] 146690-3200 SHIM D11.5&9.4T0.1
35/1. [1] 146690-3300 SHIM D11.5&9.4T0.2
35/1. [1] 146690-3400 SHIM D11.5&9.4T0.25
35/1. [1] 146690-3500 SHIM D11.5&9.4T1.0
35/1. [1] 146690-4100 SHIM D11.5&9.4T2
35/1. [1] 146690-4200 SHIM D11.5&9.4T0.5
35/1. [1] 146690-4300 SHIM D11.5&9.4T0.75
36. [1] 146600-0800 O-RING
37. [1] 146310-4020 COVER
38. [2] 146620-5000 BLEEDER SCREW
39. [1] 146310-0100 COVER
39. [1] 146310-0100 COVER
40. [2] 146620-5000 BLEEDER SCREW
41. [1] 146312-1900 COMPRESSION SPRING
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] 146401-4220 HYDRAULIC HEAD
50. [1] 146401-4220 HYDRAULIC HEAD
50. [1] 146401-4220 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] 146430-2020 DELIVERY-VALVE ASSEMBLY
56. [4] 146432-0000 COMPRESSION SPRING
58. [4] 146440-0220 FITTING
60. [3] 139106-0100 FLAT-HEAD SCREW
67. [1] 146822-0120 GOVERNOR COVER
67/1. [1] 146508-1022 GOVERNOR COVER
67/2. [1] 146515-2520 CONTROL SHAFT
67/3. [1] 146600-0100 O-RING
67/4. [2] 139310-0200 PLAIN WASHER
67/4. [2] 139310-0200 PLAIN WASHER
67/5. [1] 146832-5500 CONTROL LEVER MARK:255
67/5B. [1] 146832-5600 CONTROL LEVER MARK:256
67/5C. [1] 146832-9300 CONTROL LEVER MARK:293
67/5D. [1] 146832-9400 CONTROL LEVER MARK:294
67/6. [2] 014110-6440 LOCKING WASHER
67/6. [2] 014110-6440 LOCKING WASHER
67/7. [1] 013020-6040 UNION NUT M6P1H5
67/8. [1] 146515-1820 LEVER SHAFT
67/9. [1] 146587-4500 COILED SPRING
67/10. [1] 146600-0200 O-RING
67/11. [1] 146602-0100 PLAIN WASHER D14&10.1T1.50
67/12. [1] 146540-1300 CONTROL LEVER
67/12B. [1] 146540-1400 CONTROL LEVER MARK:0
67/12C. [1] 146540-5200 CONTROL LEVER
67/12D. [1] 146540-5300 CONTROL LEVER
67/13. [1] 146621-1700 UNION NUT
67/14. [1] 146621-1700 UNION NUT
67/15. [1] 146526-2800 BLEEDER SCREW
67/16. [1] 146526-3400 BLEEDER SCREW
67/18. [1] 146587-0400 COILED SPRING
67/19. [1] 146541-0000 ANGLE PIECE
67/23. [1] 146925-2520 BRACKET
67/24. [2] 139006-4500 BLEEDER SCREW
67/25. [1] 013020-6040 UNION NUT M6P1H5
67/78. [1] 146600-4400 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] 146871-9520 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] 146570-0420 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] 146602-2600 PLAIN WASHER D34&13T1.0
115. [1] 146976-1200 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] 146879-3320 RETAINING PIN
122. [1] 146580-1200 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] 146110-0220 CONTROL VALVE
135/5. [1] 146114-0000 SPRING WASHER
136. [1] 146120-0120 OVER FLOW VALVE
137. [2] 139512-0500 GASKET
200. [1] 146206-0100 COILED SPRING
235. [1] 146936-3900 BRACKET
236. [2] 010206-2240 HEX-SOCKET-HEAD CAP SCREW
237. [1] 146620-0200 HEX-SOCKET-HEAD CAP SCREW
240. [1] 146650-1220 PULLING ELECTROMAGNET
240/8. [1] 146600-1700 O-RING
242. [1] 146662-1420 WIRE
243. [1] 146621-4901 UNION NUT
245. [1] 139512-0500 GASKET
247. [1] 146669-1720 INLET UNION
251. [1] 146125-0101 FILTER
252. [1] 146125-0200 COILED SPRING
800S. [1] 146020-1820 PUMP HOUSING
800S/1/6. [1] 146601-0900 PACKING RING
804S. [1] 146232-0720 COMPRESSION SPRING
805S. [1] 146574-0320 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
906. [1] 146989-9100 NAMEPLATE
907. [1] 025803-1640 WOODRUFF KEY
908. [1] 013021-2140 UNION NUT M12P1.75H10
909. [1] 014111-2440 LOCKING WASHER D21.5&12.2T3
910S. [1] 146600-6020 PARTS SET
912S. [1] 026508-1140 GASKET D11.4&8.2T1
913S. [1] 146422-0000 BLEEDER SCREW
914S. [1] 146699-0020 VALVE SET
915S. [1] 146662-1420 WIRE
916S. [1] 025803-1640 WOODRUFF KEY

Include in #2:

104741-8020 as INJECTION-PUMP ASSEMBLY

Cross reference number

BOSCH 9 460 614 825 9460614825
ZEXEL 104741-8020 1047418020
MITSUBISHI-HEAV 32A6500390 32a6500390


Zexel num
Bosch num
Firm num
Name
104741-8020 
9 460 614 825 
32A6500390  MITSUBISHI-HEAV
INJECTION-PUMP ASSEMBLY
S4S K 11CJ INJECTION PUMP ASSY VE4 VE

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   700 700 700
Average injection quantity mm3/st.   50.9 50.4 51.4
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.   51.5 48 55
Oil temperature degC   48 46 50
Injection timing adjustment_03
Pump speed r/min   700 700 700
Average injection quantity mm3/st.   50.9 49.9 51.9
Difference in delivery mm3/st.   5
Basic   *
Oil temperature degC   50 48 52
Injection timing adjustment_04
Pump speed r/min   1100 1100 1100
Average injection quantity mm3/st.   46.5 40 50
Oil temperature degC   50 48 52
Injection quantity adjustment
Pump speed r/min   1200 1200 1200
Average injection quantity mm3/st.   12.9 10.9 14.9
Difference in delivery mm3/st.   3
Basic   *
Oil temperature degC   50 48 52
Injection quantity adjustment_02
Pump speed r/min   1400 1400 1400
Average injection quantity mm3/st.   3
Oil temperature degC   50 48 52
Injection quantity adjustment_03
Pump speed r/min   1200 1200 1200
Average injection quantity mm3/st.   12.9 9.4 16.4
Difference in delivery mm3/st.   3.5
Basic   *
Oil temperature degC   50 48 52
Governor adjustment
Pump speed r/min   375 375 375
Average injection quantity mm3/st.   5.6 3.6 7.6
Difference in delivery mm3/st.   2
Basic   *
Oil temperature degC   48 46 50
Governor adjustment_02
Pump speed r/min   375 375 375
Average injection quantity mm3/st.   5.6 3.1 8.1
Difference in delivery mm3/st.   2.5
Basic   *
Oil temperature degC   48 46 50
Timer adjustment
Pump speed r/min   100 100 100
Average injection quantity mm3/st.   57 52 62
Basic   *
Oil temperature degC   48 46 50
Remarks
Full
 
Timer adjustment_02
Pump speed r/min   100 100 100
Average injection quantity mm3/st.   57 52 62
Oil temperature degC   48 46 50
Remarks
Full
 
Speed control lever angle
Pump speed r/min   375 375 375
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   800 800 800
Overflow quantity cm3/min   450 320 580
Oil temperature degC   50 48 52
Stop lever angle
Pump speed r/min   800 800 800
Pressure kPa   549 520 578
Pressure kgf/cm2   5.6 5.3 5.9
Basic   *
Oil temperature degC   50 48 52
0000001101
Pump speed r/min   800 800 800
Timer stroke mm   2.5 2.3 2.7
Basic   *
Oil temperature degC   50 48 52
_02
Pump speed r/min   600 600 600
Timer stroke mm   1 0.4 1.6
Oil temperature degC   50 48 52
_03
Pump speed r/min   800 800 800
Timer stroke mm   2.5 2.1 2.9
Basic   *
Oil temperature degC   50 48 52
_04
Pump speed r/min   1000 1000 1000
Timer stroke mm   3.9 3.3 4.5
Oil temperature degC   50 48 52
_05
Pump speed r/min   1100 1100 1100
Timer stroke mm   4.1 3.6 4.5
Oil temperature degC   50 48 52
0000001201
Max. applied voltage V   8 8 8
Test voltage V   13 12 14
0000001401
Pump speed r/min   800 800 800
Average injection quantity mm3/st.   19 18.5 19.5
Timer stroke TA mm   2 1.8 2.2
Basic   *
Oil temperature degC   50 48 52
_02
Pump speed r/min   1100 1100 1100
Average injection quantity mm3/st.   20 19 21
Timer stroke TA mm   4.1 3.6 4.5
Timer stroke variation dT mm   0 0 0
Oil temperature degC   50 48 52
_03
Pump speed r/min   1100 1100 1100
Average injection quantity mm3/st.   13.3 12.3 14.3
Timer stroke TA mm   2.5 1.5 3.5
Timer stroke variation dT mm   1.6 1.6 1.6
Oil temperature degC   50 48 52
Timing setting
K dimension mm   3.3 3.2 3.4
KF dimension mm   5.8 5.7 5.9
MS dimension mm   2.5 2.4 2.6
Pre-stroke mm   0.1 0.08 0.12
Control lever angle alpha deg.   21.5 17.5 25.5
Control lever angle beta deg.   32 27 37

Test data Ex:

0000001801 STARTING I/Q ADJUSTMENT

Test data 104741-8020
Starting Q decrease lever adjustment Adjust using the screw (A) so that the standards are satisfied, then fix using the nut (B). Screw (B) protrusion: L (C) = Cap (D) = Stop lever
----------
L=7.4~11.1mm
----------
L=7.4~11.1mm T=6~9N-m(0.6~0.9kgf-m)




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

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