Mitsubishi FGC25N:
Hydraulic pump configuration

OK, classify this as "impatient anticipation".
We are due to receive a Mitsubishi FGC25N in the next few days.
It is being transferred to our terminal from another location in the company.
We have not had an N model previously (at our location). I know from internet browsing (and on this forum) that it has the Nissan K-21 engine (which I am no stranger to).
What I would like to know in advance of this unit's arrival is:
Is the N model still configured with a PTO shaft driven off the crankshaft pulley to power the fan and rear frame mounted hydraulic pump (in the traditional Mitsu style) or has MCFA switched to a more conventional pump and fan drive?
  • Posted 6 Jun 2013 23:40
  • Discussion started by L1ftmech
  • Tennessee, United States
Showing items 1 - 6 of 6 results.
Truck arrived under its own power.
Does not look too bad in appearance.
A little over 10,000 hours on the clock.
Noticed right off that number 4 cylinder has a spark plug "slightly hissing compression" and I will need to get beyond the COP to see what the damage is there. Possibly someone simply "under torqued" the spark plug, but I've a feeling this may be a case where threads were galled and damaged by the earlier style spark plugs before Nissan went with an extended unthreaded ending to the metal plug casing.
Also noted is a leaking front crankshaft seal.
Looking at the beast it appears that the least cumbersome way to access that is going to be by removing the counterweight and radiator to reach it from behind the truck.
Anybody done one of the seals in this model using a different approach?
The steer axle front trunnion bushing steel shell has apparently shattered as I can see pieces of broken metal (consistent with steel that forms the bushing shell) hanging out of the trunnion pocket.
That looks like a pretty straight forward job of dropping out the axle assembly and then removing the bushings.

On another note, the Nikki regulator/vaporizer on this truck appears to be same one used on our Komatsu trucks with the K-21 engine. I haven't had a chance yet to confirm this so does anyone know that the regulator is identical on this MCFA application.........to what is on the Komatsu trucks.........or not identical?
Our Komatsu dealer is literally 1 block over from our shop, but the Mitsi dealer is way cross town.
  • Posted 9 Jun 2013 00:50
  • Modified 9 Jun 2013 00:54 by poster
  • Reply by L1ftmech
  • Tennessee, United States
OK, thanks. We should have the truck at our shop today as I was informed it was due to arrive at our dock last night (but after I went home).
Hopefully my first job for today will not be having to tow it from the dock to our shop bay. I would much rather it arrived under its own power.
  • Posted 8 Jun 2013 00:32
  • Reply by L1ftmech
  • Tennessee, United States
no the hydraulic pump is mounted directly to the engine PTO, or in laymens terms, its mounted on a cover on front of engine bolted on backside of cover, it is a gear driven pump driven from a gear off the gear array inside the timing cover from the looks of the diagram.

This would also mean the fan is driven straight off the waterpump hub.

hope this clears things up for you
  • Posted 7 Jun 2013 21:40
  • Reply by swoop223
  • North Carolina, United States
You've been swooped!
swoop223@gmail.com
seen a nissan platnum series( or a cat built since 2004)? pretty much like the n series mitsu. minor differences, most NOT under the hood.
  • Posted 7 Jun 2013 06:54
  • Reply by edward_t
  • South Carolina, United States
"it's not rocket surgery"
thanks mrfixit.
I was just wondering ahead of time because my exposure to MCFA trucks has been very limited over the years from the mid 1990s to present.
I have seen a sort of "evolution" in that the ones I have seen over a few years went from a radiator rear mounted su cker fan inside the counterweight, to a radiator front mounted pusher fan.
I was just wondering if they had dropped the remote hydraulic pump set up too. I guess I'll get my hands on the beast in a day or so. (I hope it comes to the shop under its own power)
  • Posted 7 Jun 2013 02:44
  • Modified 7 Jun 2013 15:05 by poster
  • Reply by L1ftmech
  • Tennessee, United States
No PTO shaft, it's just like a C5000 Cat.
  • Posted 6 Jun 2013 23:57
  • Reply by mrfixit
  • New York, United States

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