Komatsu D85EX-18 Operation & Maintenance Manual page 242

MACHINE OPERATIONS AND CONTROLS
2.
Measure length (L) of 4 link pitches in a straight portion at
least 2 links apart from master link (A).
1/4 of the measured value is the link pitch.
Standard link pitch (P): 216.3 mm
Turning limit link pitch of bushing: 219.3 mm
The master link has no link window.
REMARK
The decimal portion of the measured value of link pitch
may be different from standard link pitch (P), depending on
the measurement accuracy and machining tolerance, even
if the track is not worn. Do not judge the track is worn by
only the value measured now, but judge by the trend of the
later measured values.
METHOD FOR MEASURE GROUSER HEIGHT
Eliminate the sag of the track, and measure at the center of the
track.
Standard dimension (h): 72 mm
Repairable limit: 25 mm
METHOD FOR MEASURING TRACK ROLLER DIAMETER
1.
Measure the link tread (dimension C) as shown in the fig-
ure.
2.
Stop the machine at a position where the link tread, at
which dimension C was measured, is perfectly in contact
with the roller tread.
3.
Measure dimension B.
4.
Calculate outside diameter of the tread (dimension A).
A = (B - C) x 2
• Standard dimension (h): 222 mm
• Repairable limit: 182 mm
3-188
OPERATION