Table of Contents
Advertisement
Oil Sampling Guidelines
1. Inspect the magnetic drain plug for contamina-
tion every 250 hours.
2. Sample the oil from each wheel hub every 500
hours. Record the oil sample results and com-
pare with previous results.
3. Change the oil in the front wheel hubs every
2500 hours.
4. Wait 50 hours after an oil change or any major
repair before taking the next oil sample.
5. Shorten the oil sampling interval when any of
the readings begin to show abnormal increases
of contamination.
If a definite trend of increased metal particles is
showing up in the oil samples, remove the front
wheels and inspect the bearings. Replace the bear-
ings if necessary.
Procedure
1. The truck must have been in operation for at
least one hour prior to taking an oil sample to
ensure that all contaminants are in suspension.
2. Take the oil sample within five minutes of stop-
ping the truck.
3. Clean the area around the magnetic plug before
removing the plug.
4. Obtain the oil sample at the lowest point possi-
ble inside the wheel hub.
5. Complete the oil sample form immediately and
submit it with the oil sample for analysis.
NOTE: For more information regarding oil sampling,
refer to the Komatsu Oil Wear Analysis (KOWA)
manual.
G3-14
If any of the following conditions appear, an inspec-
tion or adjustment of the front wheel bearings is
required:
• The amount of metal found on the magnetic plug
is high. (The magnetic plug will attract metal from
the oil. A failure is indicated by an increased
amount of metal on the magnetic plug).
• External oil leaks around the front hub and
spindle area.
• A sudden increase in the size of any particle
count in the oil sample, and/or if the nickel
concentration has increased in the oil sample. (A
sudden increase in the size of any particle count
in a oil sample can indicate a possible bearing
failure.)
• If the front wheel bearings show obvious
symptoms of failure, disassembly and inspection
of the front wheel bearings is required.
OIL DRAIN AND REFILL PROCEDURE
1. Position the drain plug at the lowest position.
Remove the drain plug and drain the oil from
the front wheel hub. Inspect and reinstall the
drain plug.
2. If necessary, rotate the wheel hub to position
the fill plug at 12 o'clock.
3. Remove the fill plug.
4. Fill wheel hub assembly with SAE 80W-90 oil.
5. When properly filled, the floating ball in the sight
gauge will be at its highest position.
6. Replace the fill plug.
NOTE: The oil may need to be changed more
frequently, depending on mine conditions and the
results of the oil sample tests.
Front Wheel Hub and Spindle
G03029
Advertisement
Chapters
Table of Contents
