Hello guys! I have a question for those who know mechanics much better.My Zetor 5011 is very hard to start. If I press the button on the injection pump it starts in 2 seconds,but without the button it won't start.I want to mention that it doesn't matter the outside temperature, even if it's hot or cold, when first turned on it won't start without a button. After using it for 10 minutes, it starts without the button .I have a friend with a Zetor 5545, he only uses the button when it's very cold, otherwise it starts very easily. which can be the problem?
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question Injection pump zetor 5011
- Thread starter cipriano28
- Start date
- Joined
- Sep 9, 2012
- Messages
- 886
- Location
- Wiedemar, Germany
- First name
- Joachim
Machinery:
Zetor 2011, Zetor 3045, Zetor 5011, Zetor 7340 Economic
There is no one-size-fits-all solution...
It could be a lot of things (also combined):
- the 5545 has the tank at the level of the injection pump, here diesel does not flow back to the tank as quickly. The 5011 has the tank lower down, if the hand pump or the valve in the diesel pump or the hoses on the suction side to the tank or the pre-filter are leaking, air can get in and the diesel flows back to the tank, then the only thing that helps is to seal everything correctly or pre-pumping.
- compression too low (wear, broken/broken piston rings, wear on the cylinder liner, incorrect head gaskets, poorly adjusted and/or worn valves, ...)
- starter speed too low (gearbox starters turn faster = easier start, more compression a little faster)
- defective injection nozzles (poor fuel atomization, dripping and/or clogged nozzles, incorrect spray pressure, ...)
- defective pump elements (pressure too low, leaking)
- problems in the engine oil lubrication circuit (it takes too long to build up the lubrication pressure, consequently poorer compression values)
- air filter completely dirty
... and a lot more.
Without more information and photos of the condition of the tractor, it really isn't possible to say much more precisely.
It could be a lot of things (also combined):
- the 5545 has the tank at the level of the injection pump, here diesel does not flow back to the tank as quickly. The 5011 has the tank lower down, if the hand pump or the valve in the diesel pump or the hoses on the suction side to the tank or the pre-filter are leaking, air can get in and the diesel flows back to the tank, then the only thing that helps is to seal everything correctly or pre-pumping.
- compression too low (wear, broken/broken piston rings, wear on the cylinder liner, incorrect head gaskets, poorly adjusted and/or worn valves, ...)
- starter speed too low (gearbox starters turn faster = easier start, more compression a little faster)
- defective injection nozzles (poor fuel atomization, dripping and/or clogged nozzles, incorrect spray pressure, ...)
- defective pump elements (pressure too low, leaking)
- problems in the engine oil lubrication circuit (it takes too long to build up the lubrication pressure, consequently poorer compression values)
- air filter completely dirty
... and a lot more.
Without more information and photos of the condition of the tractor, it really isn't possible to say much more precisely.
thanks Joachim! I plan to do a complete check of the engine and the injection pump in the spring.I don't have enough time right now. I'll take pictures then and post them here in case anyone else encounters similar problems.
- Joined
- Sep 9, 2012
- Messages
- 886
- Location
- Wiedemar, Germany
- First name
- Joachim
Machinery:
Zetor 2011, Zetor 3045, Zetor 5011, Zetor 7340 Economic
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