10
Form No. R92.00 Rev. 10/03
Part (Item No.)
Inspection Procedure
Corrective Action
Key
Inspect for wear on side surface.
(70)
A. Discoloration.
A. Remove discoloration
with emery cloth.
Reuse key.
B. Stepped wear.
B. Replace key if worn
over .0002 in. or
.005 mm. When
coupling hub-to-shaft fit
is loose, replace the
coupling. Recheck
alignment with prime mover.
Check for excessive
pressure or side load.
Correct as needed
Guide Plate
Visually inspect contact surface between guide plate
Re-use as is.
(15)
and piston shoe. If brightly polished,
Inspect contact surface for indentations. If stepped or indented,
Replace guide plate.
Wear Plate
Check face condition for:
(16)
A. Polish over all or part of the surface
A. Re-use as is.
B. Scratches, wear or metal transfer
B. Replace wear plate.
Flush reservoir
and circuit.
Check hydraulic fluid
type, temperature rise,
and excessive pressure.
Correct as needed.
Spring
Measure free heights. Correct heights are:
(18)
A. HPV-6: 1.36” or 34.5 mm
Replace when height
B HPV-10: 1.57” or 40 mm
is decreased more
C. HPV-15: 1.79” or 45.5 mm
than 5% from the
D. HPV-20: 1.97” or 50 mm
given heights.
E. HPV-29: 2.05” or 52 mm
Spring
Measure free height. Correct heights are:
(19)
A. HPV-6: 2.44” or 62 mm
Replace when height
B HPV-10: 2.60” or 66 mm
is decreased more
C. HPV-15: 3.00” or 76 mm
than 3% from the
D. HPV-20: 3.00” or 76 mm
given heights.
E. HPV-29: 3.19” or 81 mm
Plunger
Inspect contact pattern on spherical surface.
(21)
A. Wear pattern less than 0.2 in. or 5 mm wide
A. Re-use as is.
B. Wear pattern over 0.2 in. or 5 mm wide
B. Replace plunger.
In case of rapid wear,
check hydraulic fluid
type, temperature rise,
and excessive pressure.
Correct as needed.
Guide Sleeve
Inspect outer surface contact condition.
(64)
A. Slight uneven wear on one side, partial polishing.
A. Re-use as is.
B. Distinct localized contact, with strong, bright polishing.
B. Replace guide sleeve
and cover (2).
Measure guide sleeve outside diameter at several points.
If the difference is more
than .0008 in. or .020 mm
replace guide sleeve and
cover (2). Check
fluid type, temperature
rise, and pressure.
Correct as needed.
Visually inspect for signs of seizure, scoring, or discoloration.
Replace guide sleeve
and cover (2).
Check hydraulic fluid
type, temperature rise,
and excessive pressure.
Correct as needed.
INSPECTION PROCEDURES (Continued)
Continued on Page 11
