N5756 County Road D  Fond du lac,  WI  54937

(920)906-9840 for Repair Shop

(920)933-3813 for Machine Shop 

(920)906-9841 shop cellphone - texting OK

Providing Fond du lac & surrounding areas a truly


for all your Diesel service & repair, hydraulic hose,

custom machining & motor needs.

Hours: Monday - Friday  7:00am - 5:00pm

 Saturdays By Appointment ONLY: 

September 11 & 25

CLOSED September 4th-6th Labor Day

**We are currently booking into the week of

September 6th or beyond for motor

& machine dept. work ~ please plan accordingly**

UPDATE: 8/25/2021

As the pandemic of 2020's adversity continues to cause issues to supply disruptions, increase in raw materials to suppliers & a significant rise in the cost of parts/freight JTL Repair LLC cannot support all of the weight within our current price structure set in 2018 while operating as a small business. Our vendors have passed along several price increases in the last few months and we have worked diligently to minimize the cost impact to the best of our ability while in operation. However, in order to continue to service our customers as we have for the last 17 years (and into the future) we need to make adjustments to pass along increases to our customers.

Thank you so much for your loyalty to our shop while we continue to strive to meet

and exceed your expectations & the trust you have placed in us.

                                                                                    ~ Kevin & Tina Treffert  Owners ~