OIL SEEPAGE FROM TANK TO CRANKCASE ON 149-249 MODELS
There are two points where oil from the tank may seep by and fill up the crankcase when the machines are parked overnight or longer.
(A) The oil may leak by the oil passage check valve, as explained in Service Shot #205. The valve may be seated and the valve spring stretched to prevent leakage at this point.
(B) The oil may seep at the clearance between the hub of the oil pump drive gear and the oil pump cover. An “O” ring seal has been added to prevent oil seepage at this point.
I. NEW PARTS REQUIRED: (These may be ordered from our Parts Department or your distributor.)
1 – #1351001 Oil Pump Cover (countersunk for “0” seal)
1 – #1762011 Oil Pump Cover Seal (“O” ring seal)
1 – #1927025 Oil Pump Cover Seal Washer
The Original oil pump cover may be returned for adjustment with Form M-709.
II. INSTRUCTIONS:
(A) Remove timing gear case cover.
(B) Remove oil pump drive gear.
(C) Remove oil pump cover.
(D) Install new cover with “0” seal and washer.
(E) Reassemble oil pump drive gear.
(F) Reassemble timing gear case cover.
NOTE: The two dowels in the oil pump have been discontinued in present production. Therefore, you will find it necessary to drill or ream the holes in the new covers to fit over the dowels.
III. TO INSTALL THE NEW COVER:
(A) Ream the hole in the cover to 5/16″.
(B) Assemble the cover in place over the shaft and dowels.
(C) Install screws and tighten up evenly, rotating the shaft as screws are being tightened.
(D) Back off the screws one-half turn and assemble gear. Rotate gear to line up the cover and tighten the one screw that can be reached with the gear on the shaft.
(E) Remove gear and tighten the rest of the screws.
(F) Assemble gear, lockwasher and nut. Rotate gear to make sure it turns free and tighten out.
Walter Brown
Service Manager
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