NOTE: Make sure that the piston (002) does not move above the limit of the red
groove (011).
7 Keep the applied pressure constant.
8 Loosen the round nut (004).
8.1 Get the applicable round bar (012) from the round bar kit.
8.2 Put the round bar (012) through the slot (005) into a hole of the round nut (004).
8.3 Turn the round nut (004) back the related number of turns.
8.4 Remove the round bar (012).
9 Release the pressure on the HP oil pump or on the hydraulic unit to zero.
10 Disconnect the pre-tensioner from the HP oil pump or from the hydraulic unit.
11 Remove the pre-tensioner from the elastic stud (008).
12 If necessary, fully remove the round nut (004) from the elastic stud (008).
CLOSE UP
• None
X72DF
AA00-0000-00AAA-510A-A
Maintenance Manual Loosen a round nut with a pre-tensioner
Winterthur Gas & Diesel Ltd.
- 94 - Issue 002 2020-10
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