Question from a new member...for a NH TC30. It has been losing power and getting harder to start, especially when warmed up. Changed air and fuel filters. How can I check for fuel pressure and what should it be? All electrical seems fine.
NH TC30 fuel pressure???
- Thread starter De Fox
- Start date
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- new holland tc30
Jerry/MT
Elite Member
- Joined
- Feb 2, 2008
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- 3,140
- Location
- North Idaho-The Palouse
- Tractor
- New Holland TD95D, Ford 4610 & Kubota M4500
It takes fuel, air, compression ratio, and cranking speed as well as correct valve and injection timing for a diesel to start and make power. Usually, fuel supply, air supply, and cranking speed are inadequate on an engine in reasonable mechanical condition when it won't start. Failure to start on a warm engine could be indicative of a worn injector pump (IP), but check the fundamentals first before concluding it's the IP
Make sure that you have an adequate fuel supply. Disconnect the fuel line between the fuel tank and the filter at the filter and you should have a gush of fuel at that point. Attach the inlet line and go to the filter outlet and you should see then same gush of fuel. If you don't, check the filter and the filter housing. Does you tractor have a lift pump? Check the fuel line coming out of the pump and see if you get a gush of fuel when you crank the engine over. Many of these lift pumps have a filter screen on them so check for that. Finally make sure that you have a gush of fuel going into the injector pump when you crank the engine.
Make sure the air filter is clear; no mouse nests or full of dirt, chaff, etc.
Is the battery strong? When the starter cranks does it crank fast? It should. If it doesn't, then clean the terminals and battery posts and check to make sure the ground contact on the chasis is "bright and tight". make sure that the starter bolts are tight because the starter housing is grounded to the tractor frame at the mount.
If these all check out, then do a compression test on the cylinders. Pressures should be above 350-375 psig.
Make sure that you have an adequate fuel supply. Disconnect the fuel line between the fuel tank and the filter at the filter and you should have a gush of fuel at that point. Attach the inlet line and go to the filter outlet and you should see then same gush of fuel. If you don't, check the filter and the filter housing. Does you tractor have a lift pump? Check the fuel line coming out of the pump and see if you get a gush of fuel when you crank the engine over. Many of these lift pumps have a filter screen on them so check for that. Finally make sure that you have a gush of fuel going into the injector pump when you crank the engine.
Make sure the air filter is clear; no mouse nests or full of dirt, chaff, etc.
Is the battery strong? When the starter cranks does it crank fast? It should. If it doesn't, then clean the terminals and battery posts and check to make sure the ground contact on the chasis is "bright and tight". make sure that the starter bolts are tight because the starter housing is grounded to the tractor frame at the mount.
If these all check out, then do a compression test on the cylinders. Pressures should be above 350-375 psig.
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