Inspect shaft bearing
E101 376E
Swashplate
Carefully inspect each machined surface of the swashplate for wear. Ensure all swashplate surfaces are
smooth. Inspect the swashplate's slipper running surface for flatness and brass transfer. Excessive brass
transfer from slippers may indicate you should replace the slippers. Check the journals for scratches.
Replace swashplate if necessary.
Inspect swashplate
E101 377E
Valve Plate
Inspect the valve plate for scratches and grooves. Check the plate for pitting along the running face. If
pitting from cavitation exists, replace the valve plate. Check for excess wear on the brass running face. If
you observe any discoloration or burn marks, replace the valve plate.
Run a fingernail or pencil tip across the diameter of the sealing land surface (see illustration). You should
feel no deep or outstanding grooves. These may decrease pump flow. Lap or replace if grooves or nicks
are present. Inspect the mating surfaces of the endcap and valve plate for any possible contamination;
even a few thousandths of an inch may affect pump operation.
Valve plate rework specifications are given in
ReWork Specifications
520L1033.
Ensure plate appears flat and smooth on both the running face and the bottom surface. Perform a
magnetic particle inspection to detect cracks. Replace if any cracks exist.
Repair Instructions
H1 45/53/60/68 Closed Circuit Axial Piston Pumps
Inspection
520L0957 • Rev CB • September 2014
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