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1995 Mack md690s First truck for sewer business.

Alpha Drains

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Hello just recently purchased my first truck for my sewer business. Cool back story on the truck, I use to operate this truck for a pervious employer years ago. Many long hot summers and blistering cold winters here in central Illinois I have shared with this old truck. This truck has always performed well and when the opportunity arose I took it and purchased it not just for nostalgic reasons, this is a true tank. I have been learning lots and always looking for some more insight and knowledge on these older model Mack trucks. If any one cares to share any information, maintenance tips etc. I would really appreciate it. Far as I know it is running the EM7 300hp engine with the Maxidyne 5 speed transmission, only got @160,000 miles on it. It is a pumper truck with a Moro M8 vacuum pump which still kicks plenty ass on all seasons. I will  another post asking for some advice on how to increase turning radius on my right side but besides that truck is running like a champ. Thanks in advance for any helpful tips or information.

Eric Bustamante

Alpha Drains LLC


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Nice truck.... check the steering stop clearences on both sides. There are stop bolts installed with a jam nut on then. the stop bolt should be square headed. take the weight off the steer tires and have someone turn the wheel (Engine off) all the way one way then the other way. when all the way  to one side check the gap between the bolt and the "nub" that sticks out on the axle beam. it should about an 1/8".. you can use a paint mixing stick for a feeler gauge, the length helps.. if the gaps are more than that , you should be able to adjust the stops in the gearbox. to do that... rather than me tell you, I suggest identifying the steering gear name and part #, then go to the website for adjustment procedure. similar boxes can be rebuilt as "adjustable" or "non-adjustable". Go Bulldog!

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