Technical Information
Unit returned has the backplate forced out; this is caused by the back plate not being supported by the gearbox mating face.
Ensure the gearbox mating face is clear from debris and the unit is sitting flush before tightening the bolts.
The piston retaining ring has deformation or rippling. This shows that the cylinder has been overstroked.
The piston retaining ring has no deformation or rippling. This shows that the cylinder has not been overstroked.
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