Gear end clearance .004-.008 and check the cover for wear and flat. It can be surface ground to clean up.
Shim the drive gear to crank gear lash to .005-.010.
Look the set screws over closely that drive he shaft and driven gear. That is a weak point. Be sure the screws are tight, the gear is not split, or loose on the shaft.
Take the suction line and screen off and clean, clean, clean! Anything gets sucked into the pump will lock it and shear the set screw or split the gear!
While you are in there...
Be a good time to pull the cylinder liners and replace the orings, especially since it's been hot. If any liners rode up with the head off, they MUST be removed and resealed. Check the block for cracks between the cylinders at the bottom, common failure due to freezing. Clean thoroughly!!! Orings must seal, liners must bottom completely at the top flange. Liner height above block deck is CRITICAL,.001-.003.
Take a look at the governor. Early weighted style has been replaced with the ball type. Both are prone to fail, release pieces into the engine.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
... [Read Article]
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