TC33D with 7308 loader
- Thread starter rjv1210
- Start date
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jinman
Rest in Peace
- Joined
- Feb 23, 2001
- Messages
- 20,387
- Location
- Texas - Wise County - Sunset
- Tractor
- NHTC45D, NH LB75B, Ford Jubilee
As far as I am concerned, your question should be rephrased to "How do I blow the seals out of my hydraulic pump?" Your tractor's hydraulic pressure is set by the hydraulic relief valve. It is the ONLY protection you have for your pump. Your pump not only supplies pressure to the loader, but it also supplies the same pressure to the 3PH. Raising pressures beyond spec is a sure way to cause problems throughout the hydraulic system. Checking your pressure to make sure it is correct is good practice. Low pressure can be corrected by shimming the relief valve. However, going above spec is not something I would advise nor will I describe the process. I'm that much against it.:thumbdown:
We all get used to our tractor's power and want more. The only safe way to get higher performance is to trade up to a bigger tractor.
:welcome: to TBN. We are happy to have you join our group.
We all get used to our tractor's power and want more. The only safe way to get higher performance is to trade up to a bigger tractor.
:welcome: to TBN. We are happy to have you join our group.
thclimer
Veteran Member
Jim is correct about blowing your seals on your pump if you raise the pressure above the design specification.
I have a TC33D and a 7308 loader like yours. I'm not sure what you want to pick up but there have been times when I have had my bucket full of rocks and the tractor lifted it just fine, but as I drove I could tell there was a considerable amount of weight out there and my rear tires are loaded. If your tires are not loaded and you don't have a implement on the rear and you lift the maximum amount with your bucket and drive on anything but a flat surface you might be in for a real surprise,
Can you give us an idea of what you are trying to lift? For instance if you fill your bucket full of wet sand or cement its probably not going to lift it.
I have a TC33D and a 7308 loader like yours. I'm not sure what you want to pick up but there have been times when I have had my bucket full of rocks and the tractor lifted it just fine, but as I drove I could tell there was a considerable amount of weight out there and my rear tires are loaded. If your tires are not loaded and you don't have a implement on the rear and you lift the maximum amount with your bucket and drive on anything but a flat surface you might be in for a real surprise,
Can you give us an idea of what you are trying to lift? For instance if you fill your bucket full of wet sand or cement its probably not going to lift it.
SteveInMD
Platinum Member
Many of these tractors were shipped with the loader pressure relief valve set a couple of hundred psi below spec. It can be adjusted with a set screw under the joystick cover. The psi should be set to 1800 however you need a pressure gauge to do this properly. As already mentioned - don't over do it! Mine has operated for many years at 1850 psi. The newer models have a beefier front axle and a higher lift capacity.
Here's a thread from the past on the subject...
http://www.tractorbynet.com/forums/new-holland-owning-operating/25364-nh-7308-loader-owners.html
A little history...
Years ago a generous TBN member put together a gauge, hose, and fitting and was willing to loan this out to other TBN members. Each person paid shipping to the next member interested in using the gauge. Many members benefited from this. Unfortunately a less-than-honest member decided to keep the gauge rather then send it on. Some of us took up a collection to repay the original owner.
Here's a thread from the past on the subject...
http://www.tractorbynet.com/forums/new-holland-owning-operating/25364-nh-7308-loader-owners.html
A little history...
Years ago a generous TBN member put together a gauge, hose, and fitting and was willing to loan this out to other TBN members. Each person paid shipping to the next member interested in using the gauge. Many members benefited from this. Unfortunately a less-than-honest member decided to keep the gauge rather then send it on. Some of us took up a collection to repay the original owner.