D11N TRACTOR / POWER SHIFT / 74Z00001-UP (MACHINE) POWERED BY 3508 ...
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Product: TRACK-TYPE TRACTOR
Model: D11N TRACK-TYPE TRACTOR 74Z
Configuration: D11N TRACTOR / POWER SHIFT / 74Z00001-UP (MACHINE)
POWERED BY 3508 ENGINE
Testing and Adjusting
3500 Vehicular Engines
Media Number -SENR4621-03 Publication Date -01/04/2006 Date Updated -17/04/2006
i01374151
Fuel Injector Timing
SMCS - 1290-025
NOTICE
The camshafts must be correctly timed with the crankshaft before an
adjustment of fuel timing is made. The timing pins must be removed
from the camshafts before the crankshaft is turned or damage to the
cylinder block will be the result.
Note: Ensure that the engine is in time. Refer to Testing And Adjusting, "Camshaft Timing".
Note: Refer to Testing and Adjusting, "Crankshaft Position for Fuel Injector Adjustment and Valve
Lash Setting". All of the injectors can be checked or adjusted with the crankshaft positions that are
given in the chart. This check will make sure that the pushrod lifters are off the lobes and on the base
circles of the camshafts.
Refer to the TMI (Technical Marketing Information) for the correct fuel timing dimension to use.
Table 1
Tools Needed
5P-4160 Indicator Contact Point 1
1U-8869 Dial Indicator 1
9U-5138 Setting Gauge 1
9U-5233 Magnetic Fixture Group 1
9S-9082 Engine Turning Tool 1
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Illustration 1 g00322956
1U-8869 Dial Indicator
1. The digital dial indicator needs to be programmed to read actual timing dimensions. Since the
9U-5138 Setting Gauge in the timing and fuel setting tool group is 87.00 mm, set the digital
dial indicator for 87.00 mm. Use the following steps in order to program the indicator to read
87.00 mm.
a. Turn the indicator to the ON position by pushing the "on/off" button.
b. Push the "in/mm" button so the display shows "mm".
c. A negative "-" sign should be in the display window under "REV". If that space is blank,
push the "+/-" button so the display shows a negative "-" sign. When this is done, the
movement of the plunger into the indicator will be displayed. The display will be shown
as a negative movement. The movement of the plunger out of the indicator will be
displayed as a positive movement.
d. Push the preset button and hold the preset button down until there is a flashing "P" in the
upper right corner of the display. Then release the button.
e. Push the preset button and hold the preset button down until the flashing "P" disappears
and a flashing indicator bar is seen in the lower left corner of the display. Then release
the button. Use the preset button so that this position is blank.
f. Push the preset button and hold the preset button down until the flashing indicator begins
flashing under the first number position. The first number position is located in the fourth
position to the left of the decimal. Then release the button. Momentarily pushing the
preset will cause the display number in that position to change. Use the preset until this
position reads zero (0).
g. Use the preset button to move the flashing indicator and change the display numbers until
the display shows 0087.00 mm. Push the preset button and hold the preset button until the
flashing "P" is shown in the upper right corner of the display. Release the preset button.
Momentarily push the preset button so the flashing "P" and the zeroes to the left of 87.00
mm disappear.
h. The indicator can now be turned off. The indicator will retain the preset number in
memory. To recall the preset number, repeat Steps 1.a through 1.d.
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2. Install a 5P-4160 Indicator Contact Point in the indicator stem.
3. Install the indicator into the 9U-5233 Magnetic Fixture Group. Leave the collet loose.
Illustration 2 g00323023
Adjustment of fuel timing tools
(1) 1U-8869 Dial Indicator
(2) 9U-5233 Magnetic Fixture Group
(3) 9U-5138 Setting Gauge
4. Place the fixture and the indicator on the 9U-5138 Setting Gauge with the extension rod of the
bracket on the step of the gauge. Position the indicator in the bracket so that the indicator
plunger can travel adequately. Tighten the collet.
5. Repeat Steps 1.a through 1.d.
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Illustration 3 g00323029
Fuel timing tools in position
(1) 1U-8869 Dial Indicator
(2) 9U-5233 Magnetic Fixture Group
(4) Injector follower
(5) Shoulder on fuel injector body
6. Momentarily push the preset button on the digital dial indicator in order to stop the "P" in the
upper right hand corner from flashing. The display should show 87.00 mm. Place the 1U-8869
Dial Indicator and the 9U-5233 Magnetic Fixture Group in the correct position on the injector.
Make sure that the magnetic base of the timing fixture is on the top surface of injector follower
(4) and that the extension rod is on the top surface of shoulder on fuel injector body (5) .
Note: In order to ensure an accurate fuel timing dimension, the top surfaces of injector follower
(4) and shoulder on fuel injector body (5) must be clean and dry.
7. The digital dial indicator should now read the actual fuel timing dimension of the injector that is
being checked.
8. No adjustment is necessary if the dial indicator reads the correct fuel timing dimension. Refer to
the TMI (Technical Marketing Information) for the engine that is being checked. Proceed to
Step 12.
9. If the dial indicator does not read the correct fuel timing dimension or the desired fuel timing
dimension, proceed with Steps 10 through 13.
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10. Ensure that the 1U-8869 Dial Indicator and the 9U-5233 Magnetic Fixture Group are in the
correct position on the injector. Loosen the locknut for the pushrod adjustment screw.
11. Turn the adjustment screw until the desired fuel timing dimension is read on the digital dial
indicator.
Note: Turning the adjustment screw clockwise will lower the fuel timing dimension. Turning
the adjustment screw counterclockwise will increase the fuel timing dimension.
Tighten the adjustment screw locknut to a torque of 70 ± 15 N·m (50 ± 11 lb ft) and check
adjustment again. If necessary, repeat the procedure until the adjustment is correct.
12. Remove the timing bolt from the flywheel when the fuel timing check is completed.
13. Turn the flywheel by 360 degrees in the direction of normal engine rotation. Install the timing
bolt for the flywheel. Repeat the procedure for the other half of the engine.
Copyright 1993 - 2018 Caterpillar Inc. Sun May 13 2018 00:47:37 GMT+0200 (Egypt Standard Time)
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