dickey

7-4

can  anyone help with fault codes for 94 mack e7 400

code says 7-4 what would that be

has anyone tried the ads performer box on an e7 93-97 if so how do you like it

no im gonna put mack oil pump with mack bearings if it turns out to be bearings when i get it apart 

i understand my pressure is low,thats why i was asking for input,i was thinkin bearings but thought maybe someone else had same problem 

im ok with doin the bearings but idk about 90 weight ,yea it has 673,000 ,how many miles are these usually good for 

yep 650

just bought this 1994 dump with e7 400  the thing runs excellent,no blowby,no smoke pulls great, oil pressure 56lbs at 1650 but at idle 8 lbs bump it to 800 rpm and its 30lbs ,,,oil pump??? already changed filter,oil,and put manual gauge on it,,,????

just bought this 1994 dump with e7 400  the thing runs excellent,no blowby,no smoke pulls great, oil pressure 56lbs at 1650 but at idle 8 lbs bump it to 800 rpm and its 30lbs ,,,oil pump??? already changed filter,oil,and put manual gauge on it,,,????