Greetings:
I'm trying to get my new (to me) 757 Z-trak back running again. Based on the issues outlined in the forum in various places, I took the shields off of the heads and front in order to clean the head fins. Indeed, while they weren't totally plugged off, several fins had obstructions of greasy dirt. So I cleaned everything as best possible and reassembled.
While doing this work, I noticed that the governor appeared to be mal-adjusted, the linkage would move only very slightly, just a bare bit. I.e. the governor arm was adjusted on the shaft in such a fashion as to prevent any movement at all of the governor throttle plate. Turns out this is the main throttle plate in terms of power...
Before disassembling, I had the mower out in the yard and found that when I would engage the blades, the RPM's would drop. They drop again when the hydraulic pump is turning the wheels...
So based on this, I've adjusted the arm on the shaft to allow for full movement of the throttle. I start the motor to test the re-assembly and find that the governor is not working to control the RPMs. The arm appears to be dead, there's no force moving it as a function of RPM.
The last service the mower had (JD dealer in Oct. 2011) stated that the mower would not idle down, and that the governor was out of adjustment, so the tech adjusted the governor...
I'm thinking that the plate on the inside of the housing has come off/loose... Anyone able to opine on the symptoms?
Much Grass,
I'm trying to get my new (to me) 757 Z-trak back running again. Based on the issues outlined in the forum in various places, I took the shields off of the heads and front in order to clean the head fins. Indeed, while they weren't totally plugged off, several fins had obstructions of greasy dirt. So I cleaned everything as best possible and reassembled.
While doing this work, I noticed that the governor appeared to be mal-adjusted, the linkage would move only very slightly, just a bare bit. I.e. the governor arm was adjusted on the shaft in such a fashion as to prevent any movement at all of the governor throttle plate. Turns out this is the main throttle plate in terms of power...
Before disassembling, I had the mower out in the yard and found that when I would engage the blades, the RPM's would drop. They drop again when the hydraulic pump is turning the wheels...
So based on this, I've adjusted the arm on the shaft to allow for full movement of the throttle. I start the motor to test the re-assembly and find that the governor is not working to control the RPMs. The arm appears to be dead, there's no force moving it as a function of RPM.
The last service the mower had (JD dealer in Oct. 2011) stated that the mower would not idle down, and that the governor was out of adjustment, so the tech adjusted the governor...
I'm thinking that the plate on the inside of the housing has come off/loose... Anyone able to opine on the symptoms?
Much Grass,