6-21
GROUP 2 MAJOR COMPONENT
1. MAIN PUMP
Before inspection, wash the parts well and dry them completely.
Inspect the principal parts with care and replace them with new parts when any abnormal wear
exceeding the allowable limit or damage considered harmful is found.
Replace the seal also when any remarkable deformation and damage are found.
PISTON SHOE AND PISTON
Check the axial play of the piston and
piston shoe.
ɻà
0.2mm
PISTON ASSEMBLY AND CYLINDER
BLOCK
Check the appearance visually.
No damage, scouring, abnormal wear
(Particularly, in the slide portion) should be
found.
Check the clearance between the piston
outside dia and cylinder block inside dia.
D-d
à
0.050mm
R55NM7PH46
R55NM7PH47
S
SHAFT
Check the wear amount of the oil seal
mounting section.
Wear mount
à
0.025mm
1)
2)
3)
(1)
(2)
(1)
(1)
ɻ
d
D