OM-C3 11/21
39
Service and Maintenance - 500 Hour
SP 17. Checking Tensioner Spring Tension
A belt tension gauge will not give an accurate measure of
the belt tension when automatic spring tensioner is used.
Measure tensioner spring tension using a torque wrench
and procedure outlined below:
1. Release tension on belt using a long handled 1/2 inch
drive tool in square hole in tensioner arm. (Earlier
tensioner arms have bolt in place of square hole, and
require breaker bar with socket.) Remove belt from
pulleys.
NOTE: While belt is removed, inspect pulleys and
bearings. Rotate and feel for hard turning and listen for
any unusual sounds. If pulleys or bearings need
replacement, contact your Northern Lights dealer.
2. Release tension on tension arm and remove drive tool.
3. Put a mark (A, right) on swing arm of tensioner as
shown.
4. Measure 21 mm (0.83 in.) from (A) and put a mark
(B, right) on tensioner mounting base.
5. Install torque wrench (C, right) so that it is aligned
with centers of pulley and tensioner. Rotate the swing
arm using a torque wrench until marks (A and B) are
aligned.
6. Record torque wrench measurement and compare with
specification below. Replace tensioner assembly as
required.
Specification:
Spring Tension—Torque...............18-22 N·m (13-16 lb-ft)
NOTE: Threads on belt tensioner roller cap screw
are LEFT-HAND threads.
Marks on tensioner - Mark on swing arm (A), mark on
tensioner mounting base (b)
Align Torque Wrench (C) with Pulley
Align marks on tensioner - Swing arm (A), Tensioner
mounting base (b)
