Re: 1992 U280
Reply #1 –
Only horizontally mounted filter is the coolant filter - behind the alternator on driver side of block.
NOTE: There are different coolant filters for different coolant formulations. Search the term "coolant filter" on Forum for more info.
Fuel filter locations on my '93 U280 (same engine):
1. Primary fuel filter: mounted on the frame, passenger side rearmost compartment, above the start battery.
2. Secondary fuel filter: mounted on engine block, passenger side, down low, just above the lift pump.