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6
MODEL TL70 - - BOSCH INJECTION PUMP CALIBRATION DATA
TYPE VE 4/11 F 1250 L 816 AND TYPE VE 4/11 F 1250 L 816- -1
ASSEMBLY DATA
Pump timing on engine: delivery start 6° ± 1° before
T.D.C. of cylinder 1 on compression stroke.
Plunger pre--lift for pump timing on engine: 0.04 in. (1
mm) from B.D.C. (with tools 380000228 --
380000229).
Cylinder No. 1 delivery line union on pump: marked
with letter A.
ASSEMBLY DIMENSIONS
SYM-
SVS
KF
BOL
(max)
inch
0.17 (4.30) 0.19 to 0.21
(mm)
(5.00 to
5.40)
Plunger pre--lift from BDC:
0.007 ± 0.001 in. (0.2 ± 0.02 mm) (0.04)
rpm: 800
rpm: 800
rpm: 750
rpm: 350
rpm: 1350
rpm: 100
Rev/min
Internal pressure psi (bar)
Rev/min
Advance stroke
Rev/min
Backflow
NOTE: The values shown above in brackets must be used for checking purposes only.
SECTION 10 - - ENGINE - - CHAPTER 1
MS
ya
yb
0.05 to 0.07
1.49 to 1.57
1.74 to 1.95
(1.40 to
(37.9 to
(44.2 to
1.80)
39.9)
49.6)
1. START OF DELIVERY
Pump rotation (viewed from drive side):
counterclockwise
2. ADVANCE REGULATOR STROKE
3. FUEL SUPPLY PUMP PRESSURE
4. FULL LOAD DELIVERY
Delivery per 1000 shots: cm
5. SPREAD GOVERNOR AT IDLE SPEED
Delivery per 1000 shots: cm
6. SPREAD GOVERNOR AT MAXIMUM SPEED
Delivery per 1000 shots: cm
7. DELIVERY AT STARTING SPEED
8. TRANSFER PRESSURE PROGRESSION
600
46.4 to 55.1 (3.2 to 3.8)
9. INJECTION ADVANCE PROGRESSION
600
in. (mm)
0.0472 to 0.0787
(1.2 to 2.0)
0.0354 to 0.0906
(0.9 to 2.3)
10. BACKFLOW
CALIBRATION TEST CONDITIONS
Test bench conforming to ISO 4008/1 .../2
Injectors
conforming
[(1.688.901.020 with calibrated pad ∅ 0.02 in.
(0.6 mm)].
Injector pressure setting 2694 to 2538 psi
(172 to 175 bar).
Fuel supply pressure: 0.35 ± 0.05 psi
(5.07 ± 0.72 bar).
Pipes (conforming to ISO 4093.2):
0.24 x 0.08 x 33 in. (mm 6 x 2 x 840).
Graduate drain time:
Test liquid: ISO 4113 at a temperature of
113° ± 33.8 °F (45° ± 1°C) at outlet.
Advance stroke: 0.12 to 0.13 in. (3.0 to 3.4 mm)
Internal pressure: 59.4 to 68.17 psi (4.1 to 4.7 bar)
3
62 to 63
3
21 to 25
3
43 to 47
Delivery per 1000 shots: cm
800
59.4 to 68.1 (4.1 to 4.7)
800
0.118 to 0.134
(3.0 to 3.4)
0.0984 to 0.154
(2.5 to 3.9)
500
3
cm
41.7 to 83.4 (26.7 to 98.4)
to
ISO
30 sec.
Injection order: 1--3--4--2
3
Spread: cm
-- 4.0 (4.0)
3
Spread: cm
≤ 3.5 (3.5)
3
Spread: cm
3
90 to 140
1250
88.4 to 97.1 (6.1 to 6.7)
1000
0.189 to 0.220 (4.8
0.213 to 0.244
to 5.6)
(5.4 to 6.2)
0.177 to 0.232 (4.5
0.201 to 0.244 (5.1
to 5.9)
1250
55.6 to 139 (40.6 to 153)
7440--A61
--
1250
to 6.5)
(continued)
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