約翰迪爾電噴柴油機的噴油器調整方法與技術資料John Deere強鹿發動機配件RE528708缸墊,
Adjust Electronic Unit Injector Preload
1. Remove plug from cylinder block and install JDG820 Flywheel Turning Tool (B).
IMPORTANT: Timing pin MUST BE installed in slot of camshaft first. Then install second timing pin in crankshaft slot by carefully rocking flywheel back and forth.

2. Rotate engine flywheel in running direction (counterclockwise as viewed from rear) until JDG971 Timing Pin (A) engages single timing slot (D) in camshaft. The proper timing slot can be found by viewing camshaft timing lobe through camshaft timing pin bore while rotating engine. The double timing  slot
(E) will be at approximately 11 o’clock (viewed from rear of engine) when pin is installed in slot (D).This ensures that engine is locked at TDC of No. 1 cylinder’s compression stroke. Intake and exhaust rocker arms on No. 1 cylinder should be  loose.
3. Remove threaded plug from crankshaft timing hole below oil cooler and filter housing assembly.
IMPORTANT: DO NOT insert timing pin full depth into cylinder block crankshaft timing hole when rotating engine flywheel until double slot on camshaft timing lobe is at approximately 11 o’clock (viewed from rear of engine) to avoid crankshaft counterweight bending timing pin.
4. Slightly move engine flywheel back and forth with turning tool until a second JDG971 Timing Pin (C) can be installed in slot in crankshaft. This ensures that camshaft and crankshaft are in sync (properly timed).
A—JDG971 Timing Pin B—JDG820 Flywheel Turning Tool C—JDG971 Timing Pin
D—Single Timing Slot E—Double Timing Slot
JDG971 Timing Pin in Crankshaft
If timing pin does not enter crankshaft timing slot, crankshaft is not properly timed with camshaft.
Crankshaft MUST BE timed to camshaft. See CHECK AND ADJUST CAMSHAFT-TO-CRANKSHAFT TIMING
in CTM100, Section 02, Group 050.

5. Loosen lock nut (A) and loosen cylinders Nos. 3, 5, and 6 injector rocker arm adjusting screws (B) to relieve tension.
6. Slowly tighten adjusting screw until rocker arm roller contacts camshaft lobe at 0.0 clearance.
7. Tighten adjusting screw an additional 1/2 turn (180) to preload injector. Tighten adjusting screw lock nut to specifications while holding adjusting screw stationary.
Specification
Electronic Unit Injector Adjusting Unit Injector Adjusting Screw
Screw Lock Nut—Torque ................................................  65 N•m (48 lb-ft)
A—Lock Nut
8. Remove both timing lock pins, rotate crankshaft one B—Adjusting Screws
full revolution (360) and pin crankshaft only. Engine will now be locked at No. 6  TDC.
9. Set injector preload on cylinders Nos. 1, 2, and  4.
10. Install plug in timing pin hole in block and tighten to specifications.
Specification
Timing Pin Plug in Cylinder
Block—Torque .................................................................  33 N•m (24 lb-ft)

Replace Electronic Unit Injector O-Rings
1. The electronic unit injector’s two external O-rings (A) must be replaced whenever injector is removed.
2. Fuel system diagnosis will determine if unit injector is not functioning properly. Refer to Section 04, Groups 150 and 160, as required.
3. Replaced unit injectors will be returned by your authorized servicing dealer to the manufacturer for testing and rebuilding.
Unit Injector and Clamp
A—O-Rings

Replace Electronic Unit Injector Thrust Sleeve, Pad and O-Ring
1. Using an O-ring pick, remove O-ring (B).
2. Remove thrust socket (A) and pad (C).
3. Coat parts with clean engine oil and install in reverse order.
A—Thrust Socket B—O-Ring C—Thrust Pad

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