104740-1862 ZEXEL 9 460 612 103 BOSCH INJECTION-PUMP ASSEMBLY 9460612103 1047401862 8970255432

Information Cross number Calibration Data Calibration Data Ex

Information injection-pump assembly

BOSCH 9 460 612 103 9460612103

ZEXEL 104740-1862 1047401862

ISUZU 8970255432 8970255432

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Buy INJECTION-PUMP ASSEMBLY 104740-1862 zexel genuine, new aftermarket engine parts with delivery

Components :

0.	INJECTION-PUMP ASSEMBLY	104740-1862
1.	_
2.	FUEL INJECTION PUMP	104640-1862
3.	NUMBER PLATE	146921-3300
4.	_	146672-3720
5.	CAPSULE
6.	ADJUSTING DEVICE	593175-2221
7.	NOZZLE AND HOLDER ASSY	105158-2182
8.	Nozzle and Holder	8-94470-499-1
9.	Open Pre:MPa(Kqf/cm2)	13.2{135}
10.	NOZZLE-HOLDER	105088-1090
11.	NOZZLE	105007-1100

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]	146200-0320	DRIVE SHAFT
12/1.	[1]	146200-0300	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]	146303-0100	BEARING PIN
25.	[1]	146304-0000	BEARING PIN
26.	[1]	146305-0000	CLAMPING BAND
27.	[1]	146205-0000	SLOTTED WASHER
29.	[1]	146220-0020	CAM PLATE
30.	[1]	146600-0800	O-RING
31.	[1]	146300-0400	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]	146302-3600	COMPRESSION SPRING
34C.	[1]	146302-3700	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]	146310-0100	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
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]	146234-0500	GUIDE PIN
50.	[1]	146401-2020	HYDRAULIC HEAD
50.	[1]	146401-2020	HYDRAULIC HEAD
50.	[1]	146401-2020	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]	146440-0120	FITTING
60.	[4]	139106-0100	FLAT-HEAD SCREW
67.	[1]	146501-1821	GOVERNOR COVER
67/1.	[1]	146505-2021	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]	146537-6620	CONTROL LEVER
67/5B.	[1]	146537-6720	CONTROL LEVER
67/6.	[1]	014110-6440	LOCKING WASHER
67/7.	[1]	013020-6040	UNION NUT M6P1H5
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
67/18.	[1]	146587-1100	COILED SPRING
67/23.	[1]	146613-1300	BRACKET
67/24.	[2]	139006-4700	BLEEDER SCREW
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]	146551-8220	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]	146602-0500	PLAIN WASHER D17&6.4T1.60
115.	[1]	146975-8300	SLIDING SLEEVE
116.	[1]	146576-0000	SEALING 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]	146579-0820	RETAINING PIN
122.	[1]	146580-2000	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]	146120-1520	OVER FLOW VALVE
137.	[2]	139512-0500	GASKET
138.	[1]	146610-5920	INLET UNION
200.	[1]	146206-0100	COILED SPRING
205.	[1]	029470-4030	WOODRUFF KEY
225.	[1]	146929-2620	BRACKET
240.	[1]	146650-1220	PULLING ELECTROMAGNET
240/8.	[1]	146600-1700	O-RING
242.	[1]	146658-5120	WIRE
243.	[1]	146621-1000	UNION NUT
245.	[3]	139512-0500	GASKET
246.	[1]	146125-0000	EYE BOLT
247.	[1]	146606-6620	INLET UNION
248.	[1]	146614-0200	SPACER BUSHING
275.	[1]	146612-0120	BRACKET
276.	[2]	010010-2040	BLEEDER SCREW M10P1.5L20
800S.	[1]	146019-6920	PUMP HOUSING
800S/1/6.	[1]	146601-0700	PACKING RING
804S.	[1]	146232-0320	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]	146672-3720	PULSE GENERATOR
903/2.	[1]	146600-1300	O-RING &13W1.9
905.	[1]	593175-2221	ADJUSTING DEVICE
905/1.	[1]	593174-2301	BRACKET
906.	[1]	146921-3300	NAMEPLATE
912.	[2]	020146-1270	BLEEDER SCREW
921.	[1]	146659-5420	CLAMPING BAND

Include in #2:

104740-1862 as INJECTION-PUMP ASSEMBLY

Cross reference number

BOSCH 9 460 612 103 9460612103

ZEXEL 104740-1862 1047401862

ISUZU 8970255432 8970255432

Zexel num

Bosch num

Firm num

Name

104740-1862

9 460 612 103

8970255432 ISUZU

INJECTION-PUMP ASSEMBLY
4FG1 * K 11CJ 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 1290 1290 1290

Average injection quantity mm3/st. 48.6 47.6 49.6

Difference in delivery mm3/st. 3.5

Basic *

Injection timing adjustment_02

Pump speed r/min 2500 2500 2500

Average injection quantity mm3/st. 15.4 11.9 18.9

Injection timing adjustment_03

Pump speed r/min 2150 2150 2150

Average injection quantity mm3/st. 45.9 42.9 48.9

Injection timing adjustment_04

Pump speed r/min 1290 1290 1290

Average injection quantity mm3/st. 48.6 47.6 49.6

Injection timing adjustment_05

Pump speed r/min 500 500 500

Average injection quantity mm3/st. 45.8 42.8 48.8

Injection quantity adjustment

Pump speed r/min 2500 2500 2500

Average injection quantity mm3/st. 15.4 11.9 18.9

Difference in delivery mm3/st. 4.5

Basic *

Injection quantity adjustment_02

Pump speed r/min 2850 2850 2850

Average injection quantity mm3/st. 5

Governor adjustment

Pump speed r/min 425 425 425

Average injection quantity mm3/st. 10.5 10.3 10.7

Difference in delivery mm3/st. 2

Basic *

Governor adjustment_02

Pump speed r/min 700 700 700

Average injection quantity mm3/st. 3

Governor adjustment_03

Pump speed r/min 425 425 425

Average injection quantity mm3/st. 10.5 8.5 12.5

Timer adjustment

Pump speed r/min 100 100 100

Average injection quantity mm3/st. 65 55 75

Basic *

Speed control lever angle

Pump speed r/min 350 350 350

Average injection quantity mm3/st. 0 0 0

Remarks
Magnet OFF

0000000901

Pump speed r/min 1250 1250 1250

Overflow quantity cm3/min 635 505 765

Stop lever angle

Pump speed r/min 1750 1750 1750

Pressure kPa 588.5 569 608

Pressure kgf/cm2 6 5.8 6.2

Stop lever angle_02

Pump speed r/min 1750 1750 1750

Pressure kPa 588.5 569 608

Pressure kgf/cm2 6 5.8 6.2

Stop lever angle_03

Pump speed r/min 2150 2150 2150

Pressure kPa 676.5 647 706

Pressure kgf/cm2 6.9 6.6 7.2

0000001101

Pump speed r/min 1750 1750 1750

Timer stroke mm 4.2 4 4.4

Basic *

_02

Pump speed r/min 1250 1250 1250

Timer stroke mm 2 1.4 2.6

_03

Pump speed r/min 1750 1750 1750

Timer stroke mm 4.2 3.9 4.5

_04

Pump speed r/min 2150 2150 2150

Timer stroke mm 5.85 5.3 6.4

0000001201

Max. applied voltage V 8 8 8

Test voltage V 13 12 14

0000001401

Pump speed r/min 1750 1750 1750

Average injection quantity mm3/st. 35 34 36

Timer stroke variation dT mm 0.4 0.2 0.6

Basic *

_02

Pump speed r/min 1750 1750 1750

Average injection quantity mm3/st. 35 34 36

Timer stroke variation dT mm 0.4 0.1 0.7

_03

Pump speed r/min 1750 1750 1750

Average injection quantity mm3/st. 25 23.5 26.5

Timer stroke variation dT mm 1 0.5 1.5

Timing setting

K dimension mm 3.3 3.2 3.4

KF dimension mm 5.8 5.7 5.9

MS dimension mm 0.9 0.8 1

Pre-stroke mm 0.2 0.18 0.22

Control lever angle alpha deg. -2 -6 2

Control lever angle beta deg. 38 33 43

Test data Ex:

0000001801 A/T PLATE ADJUSTMENT

A/T plate adjustment 1. Turn the control lever from the idle position (B) to the Full speed position (C) 2. Adjust the A/T plate (D) so that (A)(C) - (A)(B) = L3, then fix.
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L3=33+-0.5mm
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L1=95.5mm L2=109.5mm L3=33+-0.5mm T=3.5~5N-m(0.35~0.5kgf-m)

0000001901 V-FICD ADJUSTMENT

Adjustment of the V-FICD 1. At idle lever position L1, adjust to obtain S. (Apply negative pressure P1 {P2}). 2. Confirm that L in the figure changes to L2 when negative pressure P3 {P4} is applied to the actuator. To adjust the stroke adjust the actuator's stroke adjusting screw (C) (Tightening torque T). (A) Control lever (B): lock nut (C): stroke adjusting screw (D): Actuator (E): actuator shaft
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S=1+1(mm) L1=0(mm) L2=0.56+-0.2(mm) P1=0(kPa) P2=0(mmHg) P3=-53.3(kPa) P4=-400(mmHg) T=1.2~1.5(N-m)(0.12~0.15(kgf-m))
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S=1+1(mm)

Information:

The Primary Engine Checks consist of quick and easy procedures that could identify the problem with a minimum loss of time. Always make these checks before starting the more involved troubleshooting procedures.Whenever a problem is found and corrected, always run the test again to that point to be sure there is not a combination of problems. When the problem has been corrected and the complaint resolved, stop the test. Do not continue through the complete procedure unless it is necessary. Possible Causes/CorrectionsPrestart Checks
Make sure the air filter elements are in good condition and are not plugged. Also, make sure the engine oil and coolant are at the correct levels.Check Accelerator Linkage
To check the linkage adjustment, push the pedal down until it hits the stop. If the linkage adjustment is correct, the governor linkage will move to the break-over position when the pedal is against the stop. This is shown by clearance on both sides of the tang (see the illustration). When there is clearance on both sides of the tang, the governor linkage is adjusted correctly to permit the engine to operate at high idle. If clearance is not present on both sides of the tang, adjust the governor linkage to give the needed clearance.
Governor Control Linkage Adjustment
(1) Clearance on both sides of tang. (2) Governor control linkage. (3) Pedal (full travel). (4) Governor control. (5) Lever assembly.Check Vehicle Tachometer
Install the 6V3121 Multitach Group. Start the engine and make sure that the vehicle tachometer is accurately indicating engine rpm. Some electric vehicle tachometers can be adjusted. Correct the tachometer as required. A bad tachometer can cause operation at the wrong engine rpm, this can give the feel of low power.Check For Air In The Fuel
Disconnect the fuel return line. With the engine in operation, let the fuel from the injection pump housing flow into a container. Look for air bubbles in the fuel coming from the return line. Approximately 5 to 100 visible air bubbles in the fuel is normal. If there is excessive air in the fuel find the cause and correct it. Such as checking all fuel lines and connections for leaks and repair or replacement of parts as needed.Check Fuel API Gravity Rating
Caterpillar diesel engines are set in production to produce rated power with a fuel of 35 API gravity (0.85 specific gravity). This limit provides a grade of fuel that aids engine starting and avoids vapor lock. Fuel with higher API gravities (i.e., lower specific gravities), will produce less horsepower at the factory power setting and vice versa for lower than 35 API gravity fuels. The engine fuel setting should not be adjusted to compensate for a power loss with fuels lighter than 35 as fuel system component life may be decreased.For more information see Special Instruction Form No. SEHS7067, Fuel Recommendations For Caterpillar Diesel Engines. Also, Special Instruction, Form No. SEHS6947 has fuel correction factors and tables.Check For Proper Fuel Heater Application
Make sure that fuel heaters are correctly used. In some cold climates,