Instruction Manual IM‐125
CUSTOMER'S INFORMATION BOX
CONTENTS ARE INDEPENDENT OF RIVERHAWK DOCUMENT CONTROL
215 Clinton Road
New Hartford, NY 13413
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REV
373A4000
GE DRAWING NUMBER
Revision W
Page 32 of 38
Q:
A:
The hydraulic tensioner has been taken up to its final pressure. The final stretch length is
short of the final stretch target. What is the next step?
Do not increase the hydraulic pressure. Check if the hydraulic pump is set to the right
pressure. Install the tensioner and re‐pressurize the tensioner to the final pressure then
recheck the stretch measurement. If the stretch value is still short, remove the stud
from the hole and re‐measure the stud's initial length then try to install the stud again.
Q:
A:
The hydraulic tensioner has been taken up to its final pressure. The final stretch length is
larger than the final stretch target. What is the next step?
Remove the stud from the bolt hole. Check if the hydraulic pump is set to the right
pressure. Re‐measure the stud's initial length then try to install the stud again.
Q:
A:
Is there an easier way to support or move the tensioner around the coupling shaft?
In section 8.1, a method using two straps, one around the coupling shaft and the other
attach to an overhead support, is described that can help.
Q:
A:
The tensioner is at its final pressure, but the nut cannot be loosened.
If the nuts cannot be loosened at the final pressure, continually increasing the pressure
will not help and can be dangerous and in some cases make it harder to remove the nut.
Check the nut to see if its set screws have been loosened. Check for and remove any
corrosion around the nut's threads.
Q:
A:
How do I clean the conical threads on a stud?
The conical threads are best cleaned using a spiral wound brass brush in a drill as
described in section 5.2.2