Changing my wood chipper's engine

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SUMMARY

The discussion centers on the feasibility of replacing the Kohler Command CH25s 25hp engine in a wood chipper with a Renault Clio 1.2 16v engine and a BMW E36 differential. Experts advise against this modification due to safety, economic, and design concerns. The original engine is specifically designed to maintain a constant RPM, and altering this setup could lead to structural weaknesses and potential failure of the chipper blades. Rebuilding the original engine is recommended as a safer and more cost-effective solution.

PREREQUISITES
  • Understanding of engine specifications and compatibility
  • Knowledge of power take-off (PTO) adaptors
  • Familiarity with wood chipper design and safety standards
  • Basic mechanical engineering principles related to RPM and load
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  • Research the specifications and rebuild options for the Kohler Command CH25s engine
  • Learn about power take-off (PTO) systems and their applications
  • Investigate the safety standards for modifying heavy machinery
  • Explore the implications of RPM changes on machinery performance and safety
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Wood chipper owners, mechanical engineers, and anyone considering modifications to small engines and heavy machinery.

Skylight100
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Hello everyone

I have a wood chipper as shown in photos attached to this message called 'Morbark1.jpg' and 'Morbark5.jpg'.

The engine on it as standard (Kohler Command CH25s 25hp) is too much hassle, time and money to fix and repair. My question is I wish to attach another engine onto the chipper as shown below...

http://www.ebay.co.uk/itm/engine-1149cc-renault-clio-1-2-16v-3dr-98-06-nc03owd-sheffield-/400786226055?hash=item5d50b87b87:g:XwcAAOSwEppUNmch

with a differential...

http://www.ebay.co.uk/itm/Bmw-E36-3-38-Rotation-Diff/282427857698?_trksid=p2045573.c100033.m2042&_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D20131017132637%26meid%3Dc22cdc5b61bc47c1925e9775dbbfbcda%26pid%3D100033%26rk%3D8%26rkt%3D8%26sd%3D112201001648

to branch off the main drive shaft perpendicular into the cutting drum located just before the input foliage shoot. Is this theoretically possible to attach a 1.2 8v petrol engine into a differential ? ie are there pto adaptors and the like that can link the engine to the differential. and likewise the differential into the cutting drum? thanks :)
 

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i love your upbeat attitude on replacing the engine. I do not recommend it from an economic side , convenience side or safety side.
The chipper has been sized to run at a constant RPM with the Koehler engine. All related hardware is designed to work safely at the specified RPM. To change anyone design feature will weaken the support structure, wear out bearings and related hardware and may cause the chipper blades to fail ( fly apart) ..not good for the human operator. The adaptation of the differential and large engine make a very large foot print versus the compact design. The adaptation of the non standard components will not be cheap. i recommend rebuild the original engine.
 
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Ranger Mike said:
i love your upbeat attitude on replacing the engine. I do not recommend it from an economic side , convenience side or safety side.
The chipper has been sized to run at a constant RPM with the Koehler engine. All related hardware is designed to work safely at the specified RPM. To change anyone design feature will weaken the support structure, wear out bearings and related hardware and may cause the chipper blades to fail ( fly apart) ..not good for the human operator. The adaptation of the differential and large engine make a very large foot print versus the compact design. The adaptation of the non standard components will not be cheap. i recommend rebuild the original engine.
Good advice from Ranger Mike. Thread is closed.
 
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