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 STEP 11.
Remove and discard the two
STEP 7.
Depress the seal pressurizing
O-rings (Item 11) between
valve, (Items 15,16,17, and 18)
end covers and pump center
if pump is so equipped, to be
section.
sure that there is some resist-
ance but that movement is free.
STEP 12.
Do Not Remove drive shaft
seal (Item 1) in the front
Check bearing bore diameter in
STEP 8.
cover (Item 5) unless it is
front and rear covers (Item 5
damaged or is leaking. If
and 21) for wear.
Maximum
this seal must be replaced
acceptable bore diameter is
use care not to damage the
.9394".
seal recess in the front
cover.
Heating the cover
STEP 9.
If bearings are scored, rough,
to 250 degrees will reduce
or show signs of heat discolor-
the press fit and make re-
ation the end cover(s) must be
moval of this seal easier.
replaced.
STEP 13.
If the flow control valve
S T E P 10.
Inspect wear plate (Item 10)
(Item 19) or the relief
and thrust plate (Item 22) for
valve (Item 20) on some
wear.
If wear ridge exceeds
pumps in this series are
.0005" these plates must be
found to be defective they
replaced.
must be replaced as a unit.
S T E P 11.
Inspect gear bore walls in
5-125.
INSPECTION:
center section (Item 12) for
excessive wear or score marks.
STEP 1.
Inspect drive and driven shaft
A wear ridge will have developed
assemblies (Items 13 and 14)
at the end of the bore where the
thrust plate is located.
This
for roughness in the sealing
and bearing areas.
wear ridge should not exceed
1/32".
STEP 2
Measure drive and driven shafts
5-126.
REASSEMBLY:
(Items 13 and 14) for wear.
Minimum acceptable shaft dia-
All parts must be thoroughly
meter is .9365".
STEP 1.
cleaned prior to reassembly
by dipping in solvent and
STEP 3
Inspect shaft keyways, keys or
brushing to remove all traces
splines for excessive wear.
of contamination.
STEP 4
Inspect gear end faces, outside
STEP 2.
Install shaft seal (Item 1),
diameters and teeth for rough-
if it was removed, in front
ness or wear.
cover with the spring loaded
Force seal
lip facing inward.
STEP 5
Measure gear thickness and
into place with a flat steel
outside diameter for wear.
rod slightly smaller in dia-
Minimum acceptable gear width
meter than the O.D. of the seal.
is .8065" and diameter is 2.1047".
STEP 6.
NOTE
Make certain that shaft snap
rings are secure: break off and
The front cover must be backed
smooth up any sharp edges on the
by a smooth clean surface dur-
sides of the gears.
ing this operation to prevent
damaging or scoring its face.
5-92E
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