14 - 12
Inspection
All parts should be checked for signs of damage or wear,
paying particular attention to the parts detailed below.
Section E Hydraulics
9803/6410
Section E
14 - 12
Issue 1
Hydraulic Pump/Regulator
art
Piston assembly 6
Cylinder block assembly 4
Valve plates 9, 10
Swash plates 7, 8
Retainer plate 11
Retainer holder 12
Shaft 5
Bearings 13, 14
Oil seal 15
Body 1
Regulator piston 23
Relief valve assembly 56
Servo regulator parts (spool, sleeve,
piston)
Renew if these conditions exist
a Any sliding part is deeply scratched or has a rough surface.
b The clearance between any piston and its cylinder is 0.050 mm (0.002 in) or
more.
c The shoe/ball clearance X is 0.39 mm (0.0157 in) or more.
a Any sliding part is deeply scratched or has a rough surface.
b The spline is excessively worn or damaged.
a The cylinder block sliding contact surface is deeply scratched or has a
rough surface.
a The piston shoe sliding contact surface is deeply scratched or has a rough
surface.
b Flaking or peeling on the roller bearing 14 contact surface.
a The sliding surface is deeply scratched, thermally seized or unevenly worn
or has a rough surface.
a The oil seal 15 contact surface is deeply scratched or has a rough surface.
b The spline is excessively worn or damaged.
a Flaking or peeling on the rolling surface.
b The bearing does not operate smoothly and freely.
a The lip has been damaged, excessively worn or hardened.
a The piston and/or its bore is deeply scratched or has a rough surface.
a Any problem occurs, e.g. the set pressure has been lowered
a Any sliding part is deeply scratched or has a rough surface.
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