Reading the Freightliner preventitive Maintenance, I discovered that my local FL dealer did not document the fact that they performed maintenance item "20-04 Mechanical Fan Drive Gearbox Oil Change".
I don't want to just "hope" this was done, and it seems very simple to perform, so I plan on doing it myself.
The procedure calls for using a flushing fluid. Here is the quote from the manual:
Flush the fan drive gearbox with an approved
nonflammalbe, nontoxic solvent such as:
· Lubriplate Syn Flush
· Lubriplate Pure Flush
· Whitmore’s Flushing Oil
· Medallion™ Flushing Oil Kosher
I am not familiar with flushing fluids, and have never used them. I did some research, and found a site that seems to be a very good description of how to flush a gearbox. ( Best-Practice Gearbox Lubrication - Gear Solutions Magazine
1) Run the gear to warm the fluid
2) Drain the fluid
3) Fill enough to lubricate gears ( 2/3's capacity ), circulate the gears, drain
4) if you get a bunch of gunk out, repeat step 3
5) Fill with clean fluid to full level.
I am posting what seems to be basic information here, hoping that either I will get more information on how to do this, or a confirmation that I have this covered.
Assuming that the procedure is correct, I would like to know how to engage the mechanical fan, so I don't have to drive around the block and get the engine hot enough to engage the fan. It is possible the fan will run at idle, but I seem to recall that this fan only engages when the engine is at a certain temp.