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SECTION 10 -- ENGINE -- CHAPTER 1
6-62720 -- 09 -- 2006
JX70 MODEL -- CALIBRATION DATA FOR BOSCH INJECTION PUMP
TYPE VE 3/12 F 1250 L 977 -- 504054474
ASSEMBLY DATA
Pump timing on engine: delivery start 0° ± 0.5°
before TDC of cylinder 1 compression stroke.
Plunger pre--lift for pump timing on engine: 1 mm
from BDC with tools 380000228 -- 380001601).
Delivery line union on pump for cylinder no. 1:
marked with letter A.
ASSEMBLY DIMENSIONS
SYMBOL K KF MS ya yb
mm 3.6to3.8 3 0.5to0.9 35.5 to
39.5
39.8 to
44.8
CALIBRATION TEST CONDITIONS
Test bench conforming to ISO 4008/1.../2
Injectors conforming to ISO 7440--A61 --
(1688901027 with pad ∅ 0.5 mm (0.0197 in.))
Injector setting pressure: 250 bar (3625.925 psi).
Fuel supply pressure: 0.35 ± 0.05 bar
(5.0763 ± 0.7252 psi).
Delivery pipes (conforming to ISO 4093.2):
6 x 2 x 450 mm (0.2362 x 0.787 x 17.7165 in.)
Graduate drain time: 30 seconds
Test liquid: ISO 4113 at a temperature of 55° ± 1°C
(131° ± 33.8°F).
1. START OF DELIVERY
Plunger pre--lift from B.D.C.: mm -- Pump rotation (viewed from drive side):
anticlockwise
Injection order:1--2--3
2. ADVANCE REGULATOR STROKE
1100 rpm LDA pressure: kPa 100 Advance stroke: mm 1.8 to 2.2
3. FUEL SUPPLY PUMP PRESSURE
rpm: 800 LDA pressure: kPa 100 Internal pressure: bar 7.7 to 8.3
4. FULL--LOAD DELIVERY WITH BOOSTER PRESSURE
rpm: 900 LDA pressure: kPa 100 Delivery per 1000 shots: cm
3
76.5 to 76.9 Spread: cm
3
≤ 3.5
5. FULL--LOAD DELIVERY WITHOUT BOOSTER PRESSURE
rpm: 600 LDA pressure: kPa 0 Delivery per 1000 shots: cm
3
73.8 to 74.2 Spread: cm
3
--
6. SPREAD GOVERNOR AT IDLE SPEED
rpm: 325 LDA pressure: kPa 0 Delivery per 1000 shots: cm
3
12 to 13 Spread: cm
3
≤ 4.5
7. SPREAD GOVERNOR AT MAXIMUM SPEED
rpm: 1350 LDA pressure: kPa 100 Delivery per 1000 shots: cm
3
32.0 to 33.0 Spread: cm
3
--
8. DELIVERY AT STARTING SPEED
rpm: 100 Delivery per 1000 shots: cm
3
100 to 140
9. INJECTION ADVANCE PROGRESSION
LDA pressure kPa 100
Rev/min 1250 1100 900
Advance stroke mm 2.5to3.5 1.8to2.2 0.3to1.3
10. TRANSFER PRESSURE PROGRESSION
LDA pressure kPa 100
Rev/min 1250 1100 500
Internal pressure supply: bar 8,7 7.7to8.3 4.5to5.5
11. BACKFLOW
Rev/min 1250 500
LDA pressure kPa 100 100
Backflow for cm
3
/10 s 66.7 to 105.5 50.0 to 77.6
(continued)
Note: The values shown above in brackets must be used for checking purposes only.
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