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Cummins NHC 250 The model would tend to help! Cummins NHC 250 in a M812 Bridge Truck Thanks!

We have installed a new relief springs and had new hoses made but need some help on installing the hoses. The hose on the bottom of the oil pan needs to go where on the oil pump? And the line that goes to the fitting on the side of the engine block needs to go where on the oil pump? Any...

Were going to have it off tomorrow and I finally found a place that does sell the parts instead of a $3000 plus complete assy!! Most places acted as if this pump was obsolete which is odd since the 855 Cummins block was probably sold in the millions. I'll let you know what I find out on the...

I need an oil pump for my NHC 250 Cummins. M812 Bridge Truck. I tried calling John Winslow twice and have not received a call back. A new pump is $3,305 and Clark Truck wants $1,800 for a take off pump that hasn't even been rebuilt. For those prices I can get a great running take out 290 or...

Checked the oil pressure for a second time with a different gauge on my M812 NHC250 Cummins. The oil pressure bounces all around from 41 to 27psi. Mainly shows around 30 psi but when rpm increases the oil pressure actually decreases. I'm thinking I have a bad relief in my oil pump. My...

My power steering is low on my M812 with cummins power. I do not see what fluid is recommended on the date plate in the cab. What should I use? Andy

Thanks for the info. We are going to have a Cummins mechanic take a look at it shortly to see what needs to be done. I'll keep you updated.

We changed the oil and moved the truck approx 25 miles into town. We were hoping that the oil change and filter would bring up the oil pressure but it remains around 30 psi when running down the road at 50-55mph. We are going to see if new rods and mains would help but if I could get a good...

We are finally going to change the oil and filter, fuel filter and drive the truck approx 25 miles to a pole shed that we will be renting so we can start to really work on this rig. Question is I have a flat on the inner dual and need to change it before the short journey. What size is the...

Trucks turn signals do not operate for any lights. The turn signal indicator in the cab does not flash. What things should I be looking for to correct this problem? The headlights and brake lights work just fine. :?

RE: Oil and fuel filters Thank you for you help. Andy

Does anyone know what fuel filters and oil filters I need to buy for my M812? I want to replace all fuel and oil filters on the truck. If anyone has a cross reference chart for napa, baldwin, wix, etc. filters I would appreciate it. Any tips or things to look for while changing the oil or...

I will check the gage. Thanks for the advice / Andy

Mine seems to be 30psi at idle and not much higher at full load. What is the most likely cause or remedy? Any thoughts?

I'm a new owner of a 1977 M812 Bridge Truck with the NHC250 Cummins engine. What should the normal oil pressure be at operating temp for idle and at driving speeds? What is the best place to buy rims to convert this truck over to 1600x20 single tires? Thanks, Andy