Adjust and Clean Breaker Points

TM-5-4240-501-14P Special Diver Air Support System (SDASS) NSN 4220-01-292-3708 Manual
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TM 5-4240-501-14P IGNITION FLYWHEEL TYPE-- EXTERNAL BREAKER MODEL SERIES 193000, 200000, 230000, 243000, 300000, 320000, 19D, 23D Fig. 25 - Flywheel Ignition External Breaker Models 193000, 200000, 233000, 243000, 300000, 320000 Replace Breaker Points - Model Series 193000, 200000, 230000, 243000, 300000, 320000, 19D, 23D Turn crankshaft until points open to widest gap. This makes it easier to assemble and adjust points later if crankshaft is not removed. Remove condenser and upper and lower mounting screws. Loosen lock nut and back off breaker point screw. Fig. 26. Reverse process to install. Fig. 26 - Breaker Points To avoid the possibility of oil leaking past the breaker point plunger or moisture entering the crankcase between plunger and bushing, a plunger seal is now installed on engine models using this ignition system. Fig. 27. These parts may be added to engines in the field if contaminated points are experienced. Fig. 27 - Seal Assembly EXTREME CARE SHOULD BE TAKEN WHEN INSTALLING SEAL ON PLUNGER, OR SEAL MAY BE FRACTURED. NOTE: Before mounting the breaker-condenser assembly, apply a sealer such as Permatex" to the threads of both mounting screws and the adjustment screw. The sealer prevents oil from leaking into the breaker point area. Mount the breaker point assembly, then tighten adjustment screw until the locknut has pushed the ferrule as far as possible toward the head of the adjustment screw. This secures the adjustment screw firmly to the breaker point. Adjust and Clean Breaker Points Turn the crankshaft until the points open to their widest gap. Turn breaker point adjusting screw points open to .020" (0.5 mm). Tighten locknut, while holding adjustment screw, Fig. 26. To clean points turn crankshaft until points are closed. Insert a piece of lintless paper and draw the paper between the points. Open the breaker points to withdraw the paper (so the paper will not tear and allow a small portion to remain between the points). Apply additional sealer at the point at which the primary wire passes under the breaker cover. This area must be re-sealed to prevent the entry of dust and moisture. See Fig. 28. 2 8

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