Twin Disc MG-5170DC, Service Manual

Page: 148 / 250

148
Twin Disc, Incorporated
Assembly
Marine Transmission Service Manual #1020667
6. Attach dial indicator to housing with probe resting on face of output
flange. Locate indicator probe as close to O.D. of flange as possible.
Check flange face runout by rotating flange. Total indicated runout must
not exceed 0.10 mm (0.004 in.).
7. Attach dial indicator to housing with probe resting on O.D. of output
flange pilot. Check pilot runout by rotating output flange. Total indicated
runout must not exceed 0.10 mm (0.004 in.).
Note: Should total dial indicator runout exceed 0.10 mm
(0.004 in.) proceed as follows:
A. With a felt-tip pen, draw a line across the end of the output shaft
and face of output shaft counterbore to mark original installed
position of the output flange versus the output shaft.
B. Remove the output flange as described in Section 6 and reinstall
90° from original position. Recheck runout of flange face and
flange pilot using procedures in steps 6 and 7 above. If runout is
within specification, do nothing more.
C. If runout continues to exceed tolerance, repeat procedure in (B)
above at positions 180° and 270° from originally installed output
flange position. Stop at whatever position output flange runout is
no more than 0.10 mm (0.004 in.).
D. If output flange runout cannot be reduced to acceptable
tolerances, contact the Product Service Department at Twin Disc,
Incorporated for information/recommendations.