TM 5-3810-300-24 & P2
Completely drain the lubricant while the unit is warm.
Some newer model axles have a smaller tapped and plugged hole located near and below the housing lubricant level
hole. This smaller hole has been provided for the use of a lubricant temperature indicator only and should not be used as
a fill or level hole.
Magnetic Drain Plugs.
Magnetic drain plugs perform the vital function of trapping small metallic particles that circulate in the lubricant, through
the gears and bearings, causing rapid wear and premature failure. The magnet must be strong enough to firmly hold the
particles under service conditions. We recommend plugs with elements having a minimum pick-up capacity of 2 pounds
of low carbon steel in plate or flat bar form. See Plug section in Field Maintenance Manual No. 1.
Spare clean plugs should be kept on hand for replacement at regular intervals. The change schedule can easily be
established by periodic plug examination.