Fuel System/Fuel Injection Nozzles Checking valve seat pressure (see Specifications for opening pressure). Keep watching the nozzle. Under these conditions the nozzle tip has to stay dry (visual check) after a period of 5 seconds. Work the pump lever quickly several times in succession to make the nozzle spray in the normal way. After the last stroke of the pump, observe again. If the nozzle is not quite leakproof, disassemble for servicing. Connect the nozzle to tester in horizontal position. Operate the pump lever rapidly to bleed the nozzle and allow the valve to seat. Dry the tip of the nozzle thoroughly. Now operate the pump lever slowly until the indicated pressure is approx.
2800 to 3500 kPa (28 to 35 bar; 400 to 500 psi) below opening CD,3274,G40,45 -19-01FEB94 FUEL INJECTION NOZZLE DISASSEMBLY NOTE: If all tests prove that the nozzle performs properly, no further service is necessary and the nozzle can be reinstalled (see under “Installation”). If an injection nozzle is not operating properly and must be disassembled for cleaning and/or reconditioning, see your “Stanadyne” dealer. CD,3274,G40,46 -19-01FEB94 CTM3274 (01JUL99) 40-62 Saran Liter Engines 060799 PN=307 ADJUST FUEL INJECTION NOZZLE 1. Loosen and remove lock nut (A) of lift adjusting screw (D). 2. Loosen lock nut (B) of pressure adjusting screw (C). 3.
Connect nozzle to tester, then using JDG949 Special Wrench, adjust opening pressure by turning the pressure adjusting screw (C). 4. Tighten lock nut (B) to 10 N·m (7 lb-ft), then recheck opening pressure. 5. Carefully screw lift adjusting screw (D) until it bottoms -UN-16JUN98 on spring seat (E). 6. Unscrew lift adjusting screw with the number of turns as specified. CD30674 7. Tighten lock nut of lift adjusting screw to 5 N·m (3.5 lb-ft). 8. Recheck opening pressure. CD,CTM125,199 -19-01DEC97 40 62