This Bobcat T550 came into the shop after the customer had already replaced the fuel system, but the machine still had problems getting up and running.

In this video, I walk through my diagnostic process step by step to figure out what is actually wrong instead of continuing to throw parts at the machine. I test and troubleshoot the Bobcat T550 fuel system, look at what the engine is doing, and narrow the problem down to the injectors.

After going through the testing, my conclusion is that all four fuel injectors need to be replaced.

If you're troubleshooting a Bobcat T550 that cranks but won't start, runs poorly, has fuel system problems, or you're trying to determine whether you have a bad injector, this video shows the real-world diagnostic process we use in the shop.

Topics covered:
• Bobcat T550 troubleshooting
• Bobcat T550 no-start diagnosis
• Diesel fuel system diagnostics
• Common rail diesel troubleshooting
• Fuel injector testing and diagnosis
• Bobcat diesel engine repair
• Bobcat fuel system problems
• Crank/no-start troubleshooting
• Diagnosing bad diesel injectors
• Heavy equipment repair

Bobcat specialists who work on all major equipment brands — parts & service, same-day shipping on in-stock items:

https://www.southvalleyequipment.com/...

Call South Valley Equipment: (385) 287-4366, Ext. 3 — ask for Trevor in Parts  
Pleasant Grove, UT — parts & service for Bobcat, Case, Caterpillar, John Deere, Kubota & more



https://www.4tetradgroup.com
https://www.southvalleyequipment.com

Tools We Use:
Hydraulic Cylinder Spanner   https://amzn.to/3SAlHYw
Another Spanner Option        https://amzn.to/3LR1JFb
Hydraulic Seal Clasper           https://www.4tetradgroup.com/shop/p/s...
Hydraulic Seal Stretcher       https://www.4tetradgroup.com/shop/p/p...
Injector Block Off Cap            https://www.4tetradgroup.com/shop/p/d...
Bobcat Fuel Filter Bowl Wrench     https://www.4tetradgroup.com/shop/p/f...
Wrench Extender         https://amzn.to/3Yt2yvl
Spring Compressor Tool     https://amzn.to/4fA030n
Hydraulic Seal Installation Kit       https://amzn.to/3Yrs6sV
Hand Impact Tool      https://amzn.to/3Sz0yOk
Common Rail Fuel Injector Test Kit    https://amzn.to/4dasD6T
Injector Leak Back Test Kit     https://amzn.to/46Btf3i

Electrical Supplies:
Milwaukee Solder Iron     https://amzn.to/4dpp0cY
Tesa Harness Tape      https://amzn.to/3SAdG60
X Fasten Harness Tape     https://amzn.to/4cbItNA
Non-Insulated Terminals      https://amzn.to/4dp18XH
Short / Open Tester Power Probe     https://amzn.to/3WRdrpu
Power Probe Master Kit         https://amzn.to/3WPETUR  

Shop Supplies:
Gloveworks Nitrile Gloves      https://amzn.to/3WADdwW
Oil Absorbent Pads         https://amzn.to/4ckYq48
Absorbent Pads       https://amzn.to/3WOX64P
Brake Cleaner (Its Really Good)   https://amzn.to/3yse3sA