4 a h d4y i A t iF S r k r s OIL FILTER BY PASS VALVE Removal and Installation NOTE The oil filter by pass valve onens at 10 psi OIL COOLER VALVE q u a4 v OIL FIITER VALVE 90 Fig 6A 79 Oil Cooler and Oil Filter Valve Installation 1 Remove oil filter by pass valve from the oil filter and generator adapter by catching the inner edge of the valve with a suitable hook or small screwdriver and discard valve 2 Install the oil filter by pass with the spring up in the adapter housing fig 6A 79 CRANKCASE Cleaning Inspection and Repairs 1 Remove two oil gallery plugs located at flywheel housing end of crankcase These oil gallery passages should be thoroughly cleaned with cleaning solvent 2 Check cylinder pilot bores and bearing surfaces in each half of crankcase for nicks cracks or other damage that would interfere with the proper fit of component parts NOTE Do not use scrapers or other sharp fools to clean gasket surfaces A good cleaning solvent should be used to dissolve gasket material or varnish that may adhere to surfaces NOTE The crankcase unit is serviced with all studs and main bearings installed Stud and Thread Repairs Always use anti seize compound Permatex 404 or equivalent on all threads entering aluminum 1 To replace crankcase studs install long cylinder studs to a projected length of 8 Z fig 6A 80 and short cylinder studs to a projected length of 7 using Tool J 8354 1 3 8 24 fig 6A 81 For