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

 Saturdays By Appointment ONLY: 


April 17th

May 1st, 15th & 22nd

CLOSED May 29-31st Memorial Day


JTL Repair LLC & The Machine Shop remain OPEN and we are committed to offering you the best customer service possible. 


JTL Repair & The Machine Shop, like other businesses, is not immune to the unique challenges offered by the national/global covid-19 pandemic. Unfortunately, during this time, your service/repairs may take longer to complete due to shipper & supplier delays beyond our control. Rest assured that our teams are working as hard as possible to get you the products and services that you have come to expect in a timely manner.


Thank you so much for your loyalty to our shops while we continue to strive to meet and exceed your expectations.

                                                                                    ~ Kevin & Tina Treffert  Owners ~

N5756 County Road D  Fond du lac,  WI  54937

(920)906-9840 for Repair Shop

(920)933-3813 for Machine Shop 

Providing Fond du lac & surrounding areas a truly

'ONE STOP SHOP'

for all your Diesel service & repair, hydraulic hose,

custom machining & motor needs.