Here is the critical information regarding this specific part for your Deutz BF4M/ BF6M 1013 engine (Ag 1013 1.2 refers to the agricultural engine variant):
1. Application Verification
Part Number: 0414401101
Engine: Deutz 1013 series (BF4M1013, BF6M1013)
System: Unit Pump System (UPS)
Good news: This is the correct pump element for that engine. It is the complete assembly including the roller tappet and the spring.
2. Technical Function
Unlike common rail systems, this is a mechanical unit pump.
It is bolted directly to the engine block.
It is actuated by the camshaft via a roller tappet.
It generates high pressure internally and sends the fuel through a short high-pressure line to the injector (which is simply a nozzle holder in this system).
3. Critical Installation Note
Since you are handling this part (likely for replacement), please remember these two points:
A. Timing Shims
The pump sits on timing shims. When you remove the old pump, there will be a set of shims (spacer washers) between the pump flange and the engine block. Do not lose these. They determine the injection timing.
If you are replacing a faulty pump: You must transfer the exact same shim thickness to the new pump.
If you are removing the pump for other work: Keep the shims with that specific cylinder so they go back in the same place.
B. Plunger Lubrication
When installing a new pump, the plunger and tappet roller are lubricated by the engine oil. Coat the roller and the bore with clean engine oil before insertion to prevent scoring on initial startup.
4. Part Interchangeability
0414401101 is the complete pump assembly.
The individual internal elements (delivery valve, plunger & barrel) are usually not serviceable separately; if the pump is faulty, the entire assembly is replaced.
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