75 - 9
Assembly (cont’d)
9 Inspection after Assembly
Section E Hydraulics
9803/6410
Section E
75 - 9
Issue 1
Hydraulic Rams
No-load Operation Operations are smooth and there are no abnormalities with each part after full stroking more
Inspection than five times with no load.
Measurement Confirm the maximum extension and stroke.
Inspection There is no looseness, permanent deformation or external leakage after applying the test
pressure shown in the diagram for three times to each stroke end.
External Leakage Check the oil leakage amount at the rod.
Maximum allowable leakage rates (in millilitres per 10 minutes)
inner diameter oil leakage inner diameter oil leakage inner diameter oil leakage
mm ( in) amount mm (in) amount mm (in) amount
Internal Leakage 32 (1.26) 0.4 100 (3.94) 4.0 160 (6.30) 10.0
Inspection 40 (1.58) 0.6 125 (4.92) 5.6 180 (7.09) 12.6
50 (1.97) 1.0 140 (5.51) 6.0 200 (7.87) 15.6
63 (2.48) 1.6 220 (8.66) 20.0
80 (3.15) 2.3 250 (9.84) 22.0
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