I hate to keep bugging you guys about this 7610, but I guess I need to quit looking over it so closely. I noticed when I topped the fluids up, the coolant was a quart or two low, and no signs of it in the oil. I steam cleaned the tractor really well and ran it to temp and found it is leaking externally from the head gasket just above the injection pump where the corner of the head is. A little background on the tractor's engine: It was rebuilt by a good ford mechanic after it punched a valve through the head (top part of the valve broke off) with a used head that was completely rebuilt at a local machine shop. Has just over 2000 hrs since that rebuild. I check the torque on that head bolt in that corner and it didn't spin when the wrench clicked at 110lbs. Is this a common leak on these engines? The tractor has never gotten hot enough to boil over that I have been aware of and it doesn't miss or show compression in the cooling system, just a small seeping of coolant in this one spot.
Also, the tractor is low on power and tends to have some unburnt fuel in the exhaust, quite a bit when cold, but still some haze when up to temp. It is also pretty down on power for something that should be closer to 90-100hp. It has a hard time roading a 14ft dump wagon in 8th gear that weighs about 4-5000lbs, something our 6610 can do well. I talked to the guy I use to do my injectors/pumps now, and he said he thinks the pump may have been set/slipped and is timed a little retarded. How do I check the timing on a Simms pump? The CAV on the 6610 is easy with just loosening 3 bolts and twisting it, but this one doesn't look quite as easy. The injectors only have about 500 hours on them. I bought a new set so I would have the old set to send off to get rebuilt when the time came.
Thanks in advance!
Hurst
Also, the tractor is low on power and tends to have some unburnt fuel in the exhaust, quite a bit when cold, but still some haze when up to temp. It is also pretty down on power for something that should be closer to 90-100hp. It has a hard time roading a 14ft dump wagon in 8th gear that weighs about 4-5000lbs, something our 6610 can do well. I talked to the guy I use to do my injectors/pumps now, and he said he thinks the pump may have been set/slipped and is timed a little retarded. How do I check the timing on a Simms pump? The CAV on the 6610 is easy with just loosening 3 bolts and twisting it, but this one doesn't look quite as easy. The injectors only have about 500 hours on them. I bought a new set so I would have the old set to send off to get rebuilt when the time came.
Thanks in advance!
Hurst