Yanmar C25R/YFW25R

Joe Pavlis · Oct 20, 2022

Looking for a wiring diagram for a late 80's mid 90's Yanmar C25R/YFW25R Crawler Carrier Dump.No power to instrument panel/glow plugs/hour meter. Can't seem to find specific manuals online. I am new to this machine. would be greatly appreciated.
Thanks

bmaverick · Oct 28, 2022

I believe the Yanmar Tractor Owners Group has the manuals for FREE. And or the guys in the Yanmar section do too. The machines use the SAME engines.

bmaverick · Oct 28, 2022

Joe Pavlis said:
Looking for a wiring diagram for a late 80's mid 90's Yanmar C25R/YFW25R Crawler Carrier Dump.No power to instrument panel/glow plugs/hour meter. Can't seem to find specific manuals online. I am new to this machine. would be greatly appreciated.
ThanksView attachment 767101

And if you need new tracks WBF has them too.

http://wbfparts.com/pdf/rubbertracks.pdf

bmaverick · Oct 28, 2022

Joe Pavlis said:
Looking for a wiring diagram for a late 80's mid 90's Yanmar C25R/YFW25R Crawler Carrier Dump.No power to instrument panel/glow plugs/hour meter. Can't seem to find specific manuals online. I am new to this machine. would be greatly appreciated.
ThanksView attachment 767101

This is the original, next is translated via Yandex OCR

YANMAR YFW25 3TNA68 MOTOR large-specs.translated.jpg

bmaverick · Oct 28, 2022

Joe Pavlis said:
Looking for a wiring diagram for a late 80's mid 90's Yanmar C25R/YFW25R Crawler Carrier Dump.No power to instrument panel/glow plugs/hour meter. Can't seem to find specific manuals online. I am new to this machine. would be greatly appreciated.
ThanksView attachment 767101

The engine is the Yanmar 3TNA68.

Why is it great to have this engine? It's found in many John Deere Gators and Deere industrial excavators. It's in the Deere F915 fairway mowers too. It's in the Komatsu excavators.

Yanmar has it in, C25W, C30R, C37R, YFW30D, and the very popular KE3 tractor. Typically, the 3TNA72 sibling engine is a direct swap and shares many parts with the 68.

The Yanmar Tractor Owners Group has the engine service manual in English. Too big to attach here as it's over the 8Mb limit.

YANMAR 3TN63L 3TN66L 3TNA68L 3TNA72L 3TN75L 3TN78L-T 4TN78L-T 4TNA78L-T 3-4TN82T 3TN84L-T SERVICE MANUAL.pdf

Your engine ID plate should look like this. 15PS (JIS) should be about 18Hp (SAE) for the engine. Don't discredit the engine power. This is a diesel. The torque curves are very strong throughout the power band.