TM 5-3895-346-14
POWER STEERING
MAINTENANCE
SERVICE, INSPECTION, AND MAINTENANCE
Service Tools
No special tools, other than a shaft seal driver, are required to service these pumps. This driver should be
used to assure installation of the shaft seal without damage. A length of tubular round stock should be
machined to proper dimensions. The ends must be squared. The outside diameter of the tool should be
slightly smaller than the outside diameter of the shaft seal. The inside diameter will be slightly larger than the
shaft oil seal surface. The tool must be long enough so that the shaft is not contacted by the press installation
of the seal.
Service Inspection
Daily Inspection
1.
Make certain that all hydraulic connections are tight. A loose connection will allow fluid to escape
or cause air to be drawn into the system resulting in noisy and erratic operation.
2.
Inspect the hydraulic fluid in the reservoir for evidence of foreign particles. If contamination is
found, the system should be drained.
Clean reservoir and filter thoroughly before refilling. Remove all lint particles to avoid possible clogging of
system filters or strainers.
Refill the reservoir with new oil of the proper specification poured through a micron filter, or through a 200-
mesh screened funnel.
Periodic Inspection
Check operation of the units against the troubleshooting chart. If pump is not operating satisfactorily, take the
necessary corrective measures.
Maintenance
Removal Of Units
All openings in the circuit must be properly capped if units are removed. The units removed should also be
capped or plugged to protect them from entry of foreign matter.
Adjustments
These pumps require no adjustments other than maintaining proper shaft alignment.
Replacement Parts
Use only genuine parts manufactured or sold by Vickers, Inc. as replacement parts for these units. Refer to
Parts Catalogs.
Troubleshooting
The following troubleshooting chart is compiled on the basis of vane pump performance only. It lists the pos-
sible difficulties that may be en- countered and indicates the probable cause and remedy.
It must be remembered that many of the apparent failings in pump performance may be caused by other units
in a hydraulic system. Improper pump operation is best diagnosed with adequate testing equipment and a
thorough understanding of the complete hydraulic system.
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