james Hurt
New User
Coming to the well of knowledge again!
O.K. I pulled off the valve cover to clean it out and discovered one of five studs/bolts holding down the rocker arm shaft was broken. I extracted and replaced it without much problem and hand cleaned the visible moving parts. I torqued all bolts per spec and removed spark plugs to spin the engine to check for oil flow and proper movement in the valve train. One of the eight rockers (on the opposite end of the motor as the broken bolt) was stuck in the full open position. Since that should have caused a permanent miss in the engine and since the engine ran strong (before my brilliant work) the malfunction must have occured due to my error. Any ideas on cause and what series of checks could I run?
(a) test the spring for proper tension?, (b) check the lifter rod for straightness? (c) attempt to collapse the lifter from above?
Tractor 1967 Case Model 540. 159CI.
O.K. I pulled off the valve cover to clean it out and discovered one of five studs/bolts holding down the rocker arm shaft was broken. I extracted and replaced it without much problem and hand cleaned the visible moving parts. I torqued all bolts per spec and removed spark plugs to spin the engine to check for oil flow and proper movement in the valve train. One of the eight rockers (on the opposite end of the motor as the broken bolt) was stuck in the full open position. Since that should have caused a permanent miss in the engine and since the engine ran strong (before my brilliant work) the malfunction must have occured due to my error. Any ideas on cause and what series of checks could I run?
(a) test the spring for proper tension?, (b) check the lifter rod for straightness? (c) attempt to collapse the lifter from above?
Tractor 1967 Case Model 540. 159CI.
