My 7.3L T444E powerstroke was registering fairly low oil pressure at 250,000+ miles. With the engine out for an oil change, I decided to change out the Low Pressure Oil Pump (LPOP). The new unit is much tighter (inner gear to outer) than the stock one I removed. As instructed in the kit, I soaked the gears in oil prior to installation.

Note, I did inspect the front cover and it was not grooved. If heavily grooved, there is a kit available elsewhere to fix that up; not needed in this case.

I also used Vaseline on the o-ring to keep it in place for installation. I'm looking forward to higher pressure from the LPOP.

Everything looked and felt good. Install was easy and it’s been pumping good so far.

Worked great and as always Riffraff super fast shipping and a quality product!

This fixed my hard starting problems, had to crank the engine a lot to get it started, now it fires off like normal

One of the best LPOP up grade pumps

After communicating my issue to Riff Raff Diesel, I went ahead and ordered the M208. Sorry I did not order this sooner! What a terrific upgrade for less than 150 bucks. Really appreciated the detail instructions they provided too. I did this swap (it's really an upgrade!) with the fan in place and went just fine. Just a little more patience is needed to attach the puller ect... But worked out great.
Great advice - Great parts from Riff Raff Diesel.

Good part, I Like that it comes with a new housing. Oem does not anymore.

Very easy to instal , just ensure the O ring mating face on the front cover is clean and inspect the front cover for ware from old pump. I used Permatex assembly oil liberally on the meshing surfaces. Thank you Riffraff.
From 7.3 Down under
Regards
Geoff

I DID MY LPOP PREVENTITIVLY. 340K ON MY ENGINE AND IT WAS TAKING A MOMENT FOR THE PRESSURE GAUGE TO COME UP ON START UP. GETTING WORSE WITH WINTER SETTING IN, SO I FIGURED IT IS TIME. I WAS ALSO GETTING SOME OIL AIRATION NOT BAD NOT FOAMING BUT JUST SOME MICRO AIR BUBBLES. THE MELLING PUMP IS A SMALLER PUMP THAN OEM, BUT PUMPS MORE VOLUME FOR SURE!! SAYS RITE ON THE BOX MADE IN USA. THIS LITTLE GUY MADE A MASSIVE IMPROVEMENT ON HOW MY ENGINE RUNS. IMMEDIATLY ON START UP I NOTICED IT IDLES MUCH SMOOTHER, AND MUCH QUIETER. ITS 1/3 QUIETER AT IDLE, OIL PSI COMES UP RIGHT AWAY ON COLD START, RUNS SOO MUCH BETTER THROUGH THE ENTIRE RPM BAND. BASED ON HOW WELL THIS ONE IS DOING, I COME TO THE CONCLUSION MY OLD PUMP WAS LEGIT FAILING...I ALSO DID THE FLUIDAMPER DAMPER LISTED ON THIS WEBSITE PER CLAY'S RECCOMENDATION AT THE SAME TIME. FLUIDAMPER AND THE MELLING LPOP IS A WINNING PAIR FOR SURE. I WAS BLOWN AWAY HOW MUCH BETTER THIS THING IS. NOT AIRATING OIL ANYMORE
---ALSO, I WAS HAVING AN ONGOING ISSUE WITH INJECTORS NOT FIRING CORRECTLY AT OPERATING TEMP AND UNDER LOAD. IT WOULD ALMOST FEEL LIKE A MISS/ WEAK FIRE OF THE INJECTORS. CHASED MY TAIL WITH INJECTOR O-RINGS, HARNESSES, BALANCE TESTS WITH NO SUCSESS. PROBLEM SOLVED, INJECTORS FIRING CORRECTLY NOW UNDER LOAD.