LeeBoy 685D - Axle Lubricants; Breathers

Axle Lubricants
Check the gear box, tandem box, axle and hydraulic
motor oil levels quarterly, shown in Figures 5-1 and
5-2). Add more gear oil if needed. Change the oil on
these components every year for optimum performance.
NOTE: The manufacturer recommens axle lubricant
that meets API GL-5/MT-1 or SAE J2360
specication.
Use the following procedure to change oil at the various
oil plug points as shown:
1. Park machine on level ground.
2. Remove the oil plug(s) shown in Figures 5-1 and
5-2.
3. Add oil until it starts coming out of the level plug.
4. Replace the level plug.
5. Allow the axle to sit level for at least ve minutes to
allow the oil to ow throughout components.
6. Remove the level plug and check oil level.
7. Add more oil if needed.
Side View
Tandem Oil
Level Plug
Figure 5-1. Side View of Bogie Axle
Breathers
Hydraulic gear boxes, axles, pumps and tanks need to
“breathe” as air is drawn in when hydraulic components
activate. Breathers stop water, dirt and debris from
contaminating the oil. If the breathers are clogged, the
resulting heat and pressure increase will force lubricant
to escape through seals and joints in the housing,
leading to bearing or gear failure. To prolong the
operational life of a bogie axle, regular inspections and
maintenance of the breathers is essential. (Figure 5-2)
• Always inspect the breathers when checking oil levels.
Simply dusting and brushing off the gear breathers
regularly will keep out dirt and debris that can clog the
breathers.
• Check for oil leaks. Leaks indicate that seals
have failed, thus allowing dust, debris and water to
contaminate the oil.
• If the breathers and/or seals are damaged, they
should be replaced without delay to prevent internal
contamination and inadequate lubrication.
• To replace, simply unscrew the breather and discard,
then reinstall the new breather.
Maintenance
LeeBoy 685D Motor Grader5-8