Have a 66 hp 2130 4000hr, bought new with dealer installed 146 loader. Dealer rebuilt/checked over front pump 5 yrs/200hrs ago.
I have a metalic chattering noise from the area of the front pump. Seems to go away when a hyd function is used like the loader or the scv even with no load attached to it.
Tractor works ok when cold but after 15 min of running the noise starts and the loader will not move well. A guage in SCV showed 2400 psi at all tests, noise or not.
We tore it down to replace leaking front main seal and other leaks. Found the pump driveshaft and rubber bushings in good shape but the bolts in the pulley were slightly "egged" to the side and there were rub marks from the bushing clamp on the pulley. Pulley was replaced, seal surface was grooved anyway. Tractor still makes chattering noise almost as loud as before. A look inside the stroke control circuit showed nothing bad. I thought we would find a broken spring.
Could it be loose seats in the pump bores? have yet to look at them, figured dealer should have them in good shape. I thought if it was starving for oil the SCV would show low pressure.
Another noise, possibly related, comes from the clutch area. Happens at low idle or when starting off at idle in road gear. Sounds like a hammer tapping on large heavy gears. Sometimes goes away if the throttle is bumped, or reved up.
We have been chasing these noises for years now and they are getting more common and the tractor is useless when warmed up.
Any ideas appreciated.
I have a metalic chattering noise from the area of the front pump. Seems to go away when a hyd function is used like the loader or the scv even with no load attached to it.
Tractor works ok when cold but after 15 min of running the noise starts and the loader will not move well. A guage in SCV showed 2400 psi at all tests, noise or not.
We tore it down to replace leaking front main seal and other leaks. Found the pump driveshaft and rubber bushings in good shape but the bolts in the pulley were slightly "egged" to the side and there were rub marks from the bushing clamp on the pulley. Pulley was replaced, seal surface was grooved anyway. Tractor still makes chattering noise almost as loud as before. A look inside the stroke control circuit showed nothing bad. I thought we would find a broken spring.
Could it be loose seats in the pump bores? have yet to look at them, figured dealer should have them in good shape. I thought if it was starving for oil the SCV would show low pressure.
Another noise, possibly related, comes from the clutch area. Happens at low idle or when starting off at idle in road gear. Sounds like a hammer tapping on large heavy gears. Sometimes goes away if the throttle is bumped, or reved up.
We have been chasing these noises for years now and they are getting more common and the tractor is useless when warmed up.
Any ideas appreciated.