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Case Tractors Discussion Forum

830 Case Injection Pump timing

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10-14-2010 16:46:22

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Hello all how does one time a injection pump on an 830 case? all my manual said is put the engine on 29deg, but ive never seen a pump that didnt have to be times also.? i looked for timing marks on the pump, but could find any could anyone give me a hand with this had to replace a pump

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10-14-2010 18:44:29

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 Re: 830 Case Injection Pump tim ing in reply to Cyric30, 10-14-2010 16:46:22  
Should have set pump at 29degree mark with scribe marks on pump seen through hole in front of pump before removing pump.That way you will have crankshaft set with no 1 cylinder ready to fire.If that was not done you will have to remove front valve cover an turn crankshaft to the 29degree mark an if 2 front valves are loose on no1 cyl you can install pump with 2 scribe marks lined up. If valves are not loose you have to turn crankshaft till they are loose. You must have no 1 cylinder on compression stroke set at 29 degres btdc proper place.

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10-14-2010 19:00:47

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 Re: 830 Case Injection Pump tim ing in reply to cs.hess, 10-14-2010 18:44:29  
At the age of these tractors and the probability of a possible blown fan belt over the years it probably would be a good idea to verify the accuracy of the pointer. This could be done by bringing the engine to tdc and removing the spring from # 1 exhaust valve and allowing it to drop slightly to sit on top of the piston and use a dial indicator on the stem to find true tdc then adjust (bend) the pointer as necessary. Obviously you would only move the engine the amount needed to get the tdc indication on the dial indicator as you could drop the valve into the cylinder if the engine was rotated to far. A small hairpin type clip could be slipped on the valve stem to keep it from dropping to far. mEl

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10-14-2010 18:39:33

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 Re: 830 Case Injection Pump timing in reply to Cyric30, 10-14-2010 16:46:22  
What manual are you using, put the timing mark at 29 BTDC or whatever the specified timing is and remove the 1 1/4 plug on the governor housing just in front of the pump on the pump adapter. On the pump flange internally there is a pad with a scribe line on it and the drive gear has a line etched into it. IF you are on compression on # 1 cylinder the marks should be in register if the pump is timed correctly. If no mark is present on the gear turn the engine another complete turn and recheck. It is necessary to clean the gear to see the mark. If they are there but not in register loosen the injection pump and line them up and retighten the pump. mEl

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10-15-2010 07:15:54

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 Re: 830 Case Injection Pump timing in reply to mEl, 10-14-2010 18:39:33  
Ok i found the scribe line one the internal pad, BUT noe etched line on the drive gear...can they wear off.? how well is it Scribed.?

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10-15-2010 15:03:36

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 Re: 830 Case Injection Pump timing in reply to Cyric30, 10-15-2010 07:15:54  
Sometimes very faintly, As I previously stated, you will have to clean and dry the gear after you get the 29 deg marking lined up then if its not there turn the engine a complete turn and clean and dry it again, they do not wear off so I'm bettin you are just not seeing it, without it there is no way to time the injection except by other methods to lengthy to put up here. mEl

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