PS Magazine - TB 43-PS-617
PS, The Preventative Maintenance Monthly
ISSUE 617
APRIL 2004
W
orking from the bottom up is where undercarriage PM starts on your hydraulic
excavator.
The well-being of the excavator’s undercarriage components hinges on good track
adjustment. If the track’s too tight, it puts a lot of stress on undercarriage and drive
train components. If it’s too loose, the track flaps, wearing out roller flanges and
sprocket teeth.
How to Measure
The amount of sag
in your track tells
you when to adjust.
Here’s what you need
to do before taking a
measurement:
PS 617
APR 04
25
HYEX…
Make Sure Track
Measures Up
3.
Put blocks or shop stands under the vehicle’s frame. The Type I excavator weighs
approximately 57,440 pounds. The Type II weighs 65,280 pounds and the Type III
Hyex tips the scales at 73,140 pounds.
4.
Slowly turn the track forward, then in reverse (two revolutions
both ways). Stop the track while it’s moving in the reverse direction.
2.
Lower the
excavator’s
bucket
to
raise the
track off the
ground.
1.
Swing the
upperstructure
90° to the side
of the vehicle.
looks
like you’re
sagging
again!
well,
…measure
and
be
sure!
617. 24-25 (C)
2/21/04
5:20 PM
Page 1
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