TM-9-2320-273-34

TRUCK TRACTOR, LINE HAUL; LIGHT EQUIPMENT TRANSPORTER; TRUCK CHASSIS; MEDIUM EQUIPMENT TRANSPORTER

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE

DECEMBER 1980

TM-9-2320-273-34 - Page 568 of 801

TM9-2320-273-34

(9) Checking the ring groove wear:

(a) Install anew ring in groove of piston.

(b)

Insert a 0.004 in. (0.10 mm) feeler gage between the ring and the piston groove

(fig. 14-21).

Figure 14-21. Check Piston Ring Groove for Wear.

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(c) Compress the ring in the piston groove. If the ring is below the piston land surface

with feeler gage in place, wear is excessive and the piston must be scrapped.

(10) Check the piston ring gap:

(a) Insert the rings (one at a time) in the cylinder, seating squarely with a piston head in

an unworn portion of the cylinder bore.

(b)

Measure with feeler gage; gap should be 0.010-0.020 in. (0.2540-0.5080 mm)

(fig. 14-22).

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Figure 14-22. Check Piston Ring Gap.

14-21