Water Pump User Manual

39
Installation:
As the new assembly has a machined o-ring groove it is susceptible to damage due to over
tightening therefore the instruction below must be followed:
• Clean the inspection cover with a non-scratching cloth as previous
• Position the window taking care to ensure the o ring seal is sat in the groove all the way
around before tightening.
• Tighten the bolt by HAND, until the plastic washer becomes trapped by the bolt head. Then
observe the relevant torque of 2Nm, if a torque wrench is not available then once the washer
is trapped the bolt head should be turned only ½ a turn more to tighten. The result in either
method is that you will see a witness mark through the plastic cover in the o-ring groove area
in respect of the seal turning from grey to black. This signifies the o-ring has created a seal
and does NOT require further tightening (see fig 21 below)
Figure 21