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Home > Ordnance Documents and other related manuals > > Sprocket Classification
Figure 7. Inspecting Track End Connectors And Sprocket.
Figure 8. Inspecting Sprocket.

Maintenance of the M88A1
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MAINTENANCE OF THE M88A1 - OD1672 - LESSON 1/TASK 2
With the other hand, fully depress the gage pin as shown in the figure and,
at the same time, rotate the gage on the end of the connector, ensuring that
the gage pin contacts the surface of the connector all the way around its
circumference.  Excessive end connector wear exists when, with the pin fully
depressed, the  gage pin does not, at any  point, contact the connector
surface.
(6) Check for loose or missing center guides, caps, and nuts.
c.
Repair.
If  the  inspection  described  above  reveals  any  of  the
conditions listed, repairs are then accomplished by using the procedures in
TM 9-2350-256-20.
4.
Sprocket Classification
a.
Conditions  for  Classification.
To  determine  the  serviceability
classification of the sprocket, an initial inspection must be performed.  On
the new design, the sprocket (figure 7, view B, on the previous page) has a
wear limit indicator which provides a ready visual indication of the wear
limits.  On the old design, sprocket wear must be checked by means of the
sprocket gage (figure 8, view A, on the following page).
The sprocket is classified unserviceable if the following conditions exist:
(1) On the new design sprocket, the wear indicator contour is no
longer visible.
(2) On  the  old  design  sprocket,  any  edge
on
both
sides
of
the
sprocket falls below the edge of the gage limits.
b.
Inspection of Sprocket.
(1) On the design sprocket (figure 7, view B), visually check for
wear  by  noting  the  amount  of  contour  remaining  on  the  sprocket  wear
indicator.  If the indicator is visible, the sprocket is still serviceable;
if not, it is unserviceable.
(2) On the old design sprocket, using the sprocket gage (figure 8,
view A), position the gage so that the two holes on the gage fit over the
sprocket bolts and the high part of the gage
20






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