Information injection-pump assembly
ZEXEL
104761-4121
1047614121
Rating:
Cross reference number
ZEXEL
104761-4121
1047614121
Zexel num
Bosch num
Firm num
Name
104761-4121
INJECTION-PUMP ASSEMBLY
Calibration Data:
Adjustment conditions
Test oil
1404 Test oil ISO4113orSAEJ967d
1404 Test oil ISO4113orSAEJ967d
Test oil temperature
degC
45
45
50
Nozzle
105000-2010
Bosch type code
NP-DN12SD12TT
Nozzle holder
105780-2080
Opening pressure
MPa
14.7
14.7
15.19
Opening pressure
kgf/cm2
150
150
155
Injection pipe
Inside diameter - outside diameter - length (mm) mm 2-6-840
Inside diameter - outside diameter - length (mm) mm 2-6-840
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
Right R
Injection timing adjustment
Pump speed
r/min
750
750
750
Average injection quantity
mm3/st.
50.6
50.1
51.1
Difference in delivery
mm3/st.
3
Basic
*
Oil temperature
degC
50
48
52
Injection timing adjustment_02
Pump speed
r/min
500
500
500
Average injection quantity
mm3/st.
44.7
42.2
47.2
Oil temperature
degC
48
46
50
Injection timing adjustment_03
Pump speed
r/min
750
750
750
Average injection quantity
mm3/st.
50.6
49.6
51.6
Difference in delivery
mm3/st.
3
Basic
*
Oil temperature
degC
50
48
52
Injection timing adjustment_04
Pump speed
r/min
950
950
950
Average injection quantity
mm3/st.
44.7
42.2
47.2
Difference in delivery
mm3/st.
5
Oil temperature
degC
50
48
52
Injection quantity adjustment
Pump speed
r/min
1025
1025
1025
Average injection quantity
mm3/st.
25.4
22.4
28.4
Difference in delivery
mm3/st.
4.5
Basic
*
Oil temperature
degC
50
48
52
Injection quantity adjustment_02
Pump speed
r/min
1100
1100
1100
Average injection quantity
mm3/st.
3
Oil temperature
degC
50
48
52
Injection quantity adjustment_03
Pump speed
r/min
1025
1025
1025
Average injection quantity
mm3/st.
25.4
21.9
28.9
Difference in delivery
mm3/st.
4.5
Basic
*
Oil temperature
degC
50
48
52
Governor adjustment
Pump speed
r/min
350
350
350
Average injection quantity
mm3/st.
10.7
8.7
12.7
Difference in delivery
mm3/st.
2
Basic
*
Oil temperature
degC
48
46
50
Governor adjustment_02
Pump speed
r/min
350
350
350
Average injection quantity
mm3/st.
10.7
8.2
13.2
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.
75
60
90
Basic
*
Oil temperature
degC
48
46
50
Remarks
Full
Full
Timer adjustment_02
Pump speed
r/min
100
100
100
Average injection quantity
mm3/st.
75
60
90
Oil temperature
degC
48
46
50
Speed control lever angle
Pump speed
r/min
150
150
150
Average injection quantity
mm3/st.
20
Oil temperature
degC
48
46
50
Remarks
Magnet OFF at idling position
Magnet OFF at idling position
Speed control lever angle_02
Pump speed
r/min
200
200
200
Average injection quantity
mm3/st.
15
Oil temperature
degC
48
46
50
Remarks
Magnet OFF at idling position
Magnet OFF at idling position
0000000901
Pump speed
r/min
750
750
750
Overflow quantity
cm3/min
330
150
510
Oil temperature
degC
50
48
52
Stop lever angle
Pump speed
r/min
250
250
250
Pressure
kPa
127
107
147
Pressure
kgf/cm2
1.3
1.1
1.5
Basic
*
Oil temperature
degC
48
46
50
Stop lever angle_02
Pump speed
r/min
250
250
250
Pressure
kPa
127
98
156
Pressure
kgf/cm2
1.3
1
1.6
Basic
*
Oil temperature
degC
48
46
50
Stop lever angle_03
Pump speed
r/min
750
750
750
Oil temperature
degC
50
48
52
Remarks
MEASURE
MEASURE
0000001101
Pump speed
r/min
750
750
750
Timer stroke
mm
0.8
0.6
1
Basic
*
Oil temperature
degC
50
48
52
_02
Pump speed
r/min
750
750
750
Timer stroke
mm
0.8
0.5
1.1
Basic
*
Oil temperature
degC
50
48
52
_03
Pump speed
r/min
950
950
950
Timer stroke
mm
1.6
1.2
2.1
Oil temperature
degC
50
48
52
0000001201
Max. applied voltage
V
16
16
16
Test voltage
V
25
24
26
Timing setting
K dimension
mm
3
2.9
3.1
KF dimension
mm
5.2
5.1
5.3
MS dimension
mm
0.9
0.8
1
Control lever angle alpha
deg.
17
13
21
Control lever angle beta
deg.
35
30
40
Information:
Introduction
Tools are now available for the 6V4830 Fixture Group for removal and replacement of tappet springs on 3500 Unit Injectors.
Type 2 Fuel Injector. (1) Spring. (2) Rack Bar.
(3) 6V4830 Fixture Group. (4) 4C9279 Plate Assembly.Use fixture group (3) and plate assembly (4) along with the procedure in this instruction to remove and install tappet springs on injectors.Do not perform any procedure, outlined in this publication, or order any parts until you read and understand the information contained within.Removal and Installation of Fuel Injector Tappet Springs
Take care not to damage, drop, or jar the internal parts of the injector. Injector parts must be clean when reassembled. Place a light coating of clean diesel fuel, kerosene, or calibration fluid on the moving internal components during assembly.
* Clean the outside of the injector before disassembly. Install good O-ring seals on the injector and then install a 6V4172 Cleaning Sleeve. Wash the outside of the injector with solvents and a brush. Dry with pressure air.
Pressure air can cause personal injury. When using pressure air for cleaning, wear a protective face shield, protective clothing and protective shoes.The maximum air pressure must be below 205 kPa (30 psi) for cleaning purposes.
1. Remove existing plate and secure plate assembly (4) to fixture group (3).2. Remove O-ring seals from the injector prior to placing injector into fixture.3. Place injector into fixture with spring up as shown. Rack bar (2) on injector is to be extended out so that it is locked into position by two pins on plate assembly (4). 4. Using the handle of the fixture group, compress injector spring (tappet) (5) so that lock pin (6) can be pushed IN to release the tappet assembly from the injector body. 5. Remove tappet assembly from the injector body. Remove and discard old spring. Place the injector plunger on a soft clean cloth to avoid handling the plunger. Excessive handling will remove the fuel on the plunger and may result in corroding the plunger if it is left out for an extended period of time.6. Install new spring on injector body. 7. Locate the punched dot (.)(7) on the top end of the gear after it is pulled out of the body. Using a yellow magic marker, paint the whole length of the tooth that is 180° opposite the punched dot.
Injector Assembly (shown without spring).8. As the tappet/plunger assembly is inserted into the body, the yellow colored tooth on the gear should be visible in the center of the slot for the tappet lock pin.
Injector Assembly (shown without spring). 9. With the colored tooth visible in the slot of the injector body, a pin or long narrow screw driver is needed to position the gear to engage rack and pinion teeth after which the tappet assembly will drop into place.10. Using the 6V4830 Fixture Group, apply pressure on tappet (5) to compress the spring so the pin pops out and locks the tappet assembly in place.11. Remove the injector from the fixture. Push and pull the
Tools are now available for the 6V4830 Fixture Group for removal and replacement of tappet springs on 3500 Unit Injectors.
Type 2 Fuel Injector. (1) Spring. (2) Rack Bar.
(3) 6V4830 Fixture Group. (4) 4C9279 Plate Assembly.Use fixture group (3) and plate assembly (4) along with the procedure in this instruction to remove and install tappet springs on injectors.Do not perform any procedure, outlined in this publication, or order any parts until you read and understand the information contained within.Removal and Installation of Fuel Injector Tappet Springs
Take care not to damage, drop, or jar the internal parts of the injector. Injector parts must be clean when reassembled. Place a light coating of clean diesel fuel, kerosene, or calibration fluid on the moving internal components during assembly.
* Clean the outside of the injector before disassembly. Install good O-ring seals on the injector and then install a 6V4172 Cleaning Sleeve. Wash the outside of the injector with solvents and a brush. Dry with pressure air.
Pressure air can cause personal injury. When using pressure air for cleaning, wear a protective face shield, protective clothing and protective shoes.The maximum air pressure must be below 205 kPa (30 psi) for cleaning purposes.
1. Remove existing plate and secure plate assembly (4) to fixture group (3).2. Remove O-ring seals from the injector prior to placing injector into fixture.3. Place injector into fixture with spring up as shown. Rack bar (2) on injector is to be extended out so that it is locked into position by two pins on plate assembly (4). 4. Using the handle of the fixture group, compress injector spring (tappet) (5) so that lock pin (6) can be pushed IN to release the tappet assembly from the injector body. 5. Remove tappet assembly from the injector body. Remove and discard old spring. Place the injector plunger on a soft clean cloth to avoid handling the plunger. Excessive handling will remove the fuel on the plunger and may result in corroding the plunger if it is left out for an extended period of time.6. Install new spring on injector body. 7. Locate the punched dot (.)(7) on the top end of the gear after it is pulled out of the body. Using a yellow magic marker, paint the whole length of the tooth that is 180° opposite the punched dot.
Injector Assembly (shown without spring).8. As the tappet/plunger assembly is inserted into the body, the yellow colored tooth on the gear should be visible in the center of the slot for the tappet lock pin.
Injector Assembly (shown without spring). 9. With the colored tooth visible in the slot of the injector body, a pin or long narrow screw driver is needed to position the gear to engage rack and pinion teeth after which the tappet assembly will drop into place.10. Using the 6V4830 Fixture Group, apply pressure on tappet (5) to compress the spring so the pin pops out and locks the tappet assembly in place.11. Remove the injector from the fixture. Push and pull the
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Komatsu
Komatsu
104761-4121
INJECTION-PUMP ASSEMBLY