Grinding and Testing Valves and Valve Seats

If valve seats and valve faces have been smoothly and accurately refaced with grinders available for this purpose, very little grinding or lapping will be required to complete seating operation. Apply a light coat of fine compound to valve face, insert valve in guide and give it a few oscillations—just enough to give face and seat a lapped finish. Remove valve, wash valve face and seat thoroughly with clean gasoline and allow to dry, or dry with compressed air. If inspection shows an unbroken lapped finish around both valve face and seat, valve is well seated. If lapped finish is "not complete around either valve or seat, further seating is required.

Valve Springs

Inspect length, or check tension of each spring. If a spring is more than Va" shorter than a new spring, or tension shows 5 lbs. below low limit tension of new spring, replace with new spring.

Free length of new valve spring, and tension of valve spring are as follows:

-¿.Oii.V. Engine: Outer spring free length, approximately 1-13/16"; 110 to 120 lbs. when compressed to 1-1/16". Inner spring'free length approximately " 1-15/32"; 70 to 80 lbs./when compressed to 29/32".

Side Valve Engine: Spring free length approximately 2-7/16"; 125/to 135 lbs. when compressed to IW. / /

!/ /y^ 1 /-vt re installing Valve Assemblies

To install, reverse removal procedure, taking care that marked valves are located in their respective cylinders or heads. Be sure all parts are clean. Valve seats and stems should be lightly oiled. OM.V. Engine—be sure that lower valve spring collar (8) or (23), Illus. 39, is properly seated over each valve guide. Side Valve Engine—install a new seal (9), Illus. 61, between each upper valve cover and guide and a new cork washer (11), Illus. 61, between each upper and lower cover. To compress valve springs, use Harley-Davidson special valve spring compressor, Part No. 12630-36 for O.H.V. Engine; valve spring compressor, Part No. 12053-30 for Side Valve Engine (see Illus. 38).

CAUTION: Intake and exhaust valves are of different materials and must not be interchanged. An intake valve installed in exhaust chamber will probably result in rapid burning of valve. Intake valves are marked "IN" on head; exhaust valves are marked "EX" on head. O.H.V. Engine exhaust valve stem is longer than intake valve stem, and if valves are installed in wrong locations there will not be sufficient clearance between intake rocker arm and spring cover and spring tension will not be correct; furthermore, intake valve spring coils may butt together when valve is in wide open position, and result in damage to push rod or other parts.

DIY Battery Repair

DIY Battery Repair

You can now recondition your old batteries at home and bring them back to 100 percent of their working condition. This guide will enable you to revive All NiCd batteries regardless of brand and battery volt. It will give you the required information on how to re-energize and revive your NiCd batteries through the RVD process, charging method and charging guidelines.

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