13—335 Instructions concerning renewal and tensioning of V-belts

Adjusting data

V-belts (profile width in mm)
New V-belts (KG scale on measuring instrument)
Used V-belts (KG scale on measuring instrument)
9.5 12.5
30 50
20-25 40-45

Conventional tool

Measuring instrument (Krikit)
e.g. made by Gates GmbH
Gravener StraSe 191-193, D-4018 Langenfeld 2
e.g. made by Gates Rubber Company
999 S. Broadway, USA-80217 Denver/Colorado

Checking condition of V-belts

Cracked, porous, burnt or worn V-belts should be replaced.

Checking tension
om617 - 0322-1.jpg
For handling of instrument, refer to operating instruc­tions, renewing and tensioning V-belts (13—340).
The respective adjusting data refer to KG scale of measuring instrument (arrow).

13.8-335/1 F2




Used V-belts

Check tension of V-belts and compare with values named in table for used V-belts (e.g. V-belt, profile width 9.5 mm = adjusting value 20—25) and reten-sion, if required.

Mounting and tensioning of new V-belts
Perfect mounting of a V-belt requires loosening of respective auxiliary unit or of tensioning device of V-belt to the extent that the belt can be easily mounted. In addition, the running surfaces for the V-belts on pulleys must be free of burr, rust and dirt.
Keep free of oil, grease, chemicals. Do not use belt wax or similar agents. Subsequent optimal adjustment of belt tension (for adjusting values refer to table) serves to prevent complaints such as squeaking V-belts and low life.
In scope of maintenance jobs, mount V-belts prior to engine checkup and tension to value for new V-belts named in table (e.g. V-belt, profile width 9.5 mm = adjusting value 30).
If the V-belt tension is checked during final accept­ance or following a test drive, the value measured in such a case should be in agreement with the value named in table for used V-belts (e.g. V-belt with profile width 9.5 mm = adjusting value 20—25). If less, retension V-belt to this value.

13.8-335/2 F2