TM-5-3805-254-14-P-2

TRUCK, DUMP, 20 TON, 6X4, ON-OFF HIGHWAY 71,000 GVW, IHC MODEL F-5070 (CCE)

TECHNICAL MANUAL; OPERATOR’S, ORGANIZATIONAL, DIRECT SUPPORT, GENERAL SUPPORT AND DEPT MAINTENANCE MANUAL (INCLUDING REPAIR PARTS INFORMATION AND SUPPLEMENTAL MAINTENANCE INSTRUCTIONS)

JUNE 1980

TM-5-3805-254-14-P-2 - Page 399 of 894

TRUCK SERVICE MANUAL

ENGINE

4.

Attach dial indicator gauge to block, Fig.

14-4, check

the camshaft to crankshaft gear backlash.

Rotate gear

as far as it will move, zero the gauge.

Rotate gear in

opposite direction and read dial.

5.

Normal backlash is 0.0045 to 0.0105 inch [0.114 to

0.267 mm] on a new gear, with a minimum of 0.002 inch

[0.05 mm].

6.

Gears will rattle if backlash exceeds 0.010 inch [0.25

mm].

If noise is not objectionable, do not replace gears

unless backlash exceeds 0.020 inch [0.51 mm] .