NOTE: Make sure that the piston (002) does not move above the limit of the red
groove (011).
NOTE: If you have to install the complete set of elastic studs, do the procedure in two
steps as noted.
10 Keep the applied pressure constant.
11 Tighten the round nut (004).
11.1 Get the applicable round bar (012) from the round bar kit.
11.2 Put the round bar (012) through the slot (005) into a hole of the round nut (004).
11.3 Turn the round nut (004) moderately down to the plate (007).
11.4 Put the feeler gauge through the groove (006) to make sure that there is no
clearance between the round nut (004) and the plate (007).
11.5 If there is a clearance, turn the round nut (004) more down.
11.6 Remove the round bar (012).
12 Release the pressure on the HP oil pump or on the hydraulic unit to zero.
13 Disconnect the pre-tensioner from the HP oil pump or from the hydraulic unit.
14 Remove the pre-tensioner from the elastic stud (008).
15 If necessary, compare the angle between the reference marks and the control value in
the related table (refer to section 16.1 Tightening instructions)).
NOTE: For the tie rod you compare the difference in the lengths.
16 If there is a large difference, find the cause and eliminate the fault.
CLOSE UP
• None
X72DF
AA00-0000-00AAA-711A-A
Maintenance Manual Tighten a round nut with a pre-tensioner
Winterthur Gas & Diesel Ltd.
- 90 - Issue 002 2020-10
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