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 bearing and roller bearing from the gear housing
KEY to fig. 6-1:
19.
Expansion plug
cover.
1.
Pipe plug
20.
Sleeve bearing
l. If the ball bearing (36) seated in the gear
2.
Shoulder bolt
21.
Roller bearing
housing cover is damaged and requires
3.
Cap screw
22.
Gear housing
replacement, use an internal puller to pull it from
4.
Cap screw
23.
Cap screw
the cover.
5.
Shoulder bolt
24.
Lock washer
6.
Nut
25.
Eccentric gasket
6-3. Cleaning and Inspection
7.
Lock washer
26.
Retaining ring
a. Discard and replace expansion plugs, oil seals,
8.
Gasket
27.
Ball bearing
9.
Washer
28.
Spacer
and gaskets.
10.
Spur gear
29.
Input shaft
b. Clean the bearings as directed in paragraph 5-
11.
Key
30.
Grease seal
12.
Retaining ring
31.
Eccentric housing
c. Clean all remaining parts with an approved
13.
Crankshaft
32.
Expansion plug
cleaning solvent. U s e a fiber-bristled brush if
14.
Retaining ring
33.
Sleeve bearing
15.
Ball bearing
34.
R oiler bearing
necessary to remove caked or hardened lubricants
16.
Washer
35.
Lubrication cup
from the gear teeth or other parts.
17.
Internal gear
36.
Ball bearing
d. Inspect the gears for chipped, cracked, or
18.
Spur gearshaft
37.
Gear housing cover
missing gear teeth, distortion, worn bores, and
other damage; replace damaged gears.
b. Remove the pipe plug (1) to drain the gear oil
e. Inspect the input shaft and pinion shaft for
from the gear case prior to disassembly.
misalinement, damaged gear teeth, and scored or
c. After removing the cap screws (3 and 4).
worn bearing mounting surfaces; replace damaged
s h o u l d e r bolts (2) and (5), nuts (6), and lock
parts.
washers (7), screw a 5/8-11 x 3-inch fully threaded
f. I n s p e c t t h e
crankshaft for cracks,
bolt in the threaded bore in the gear housing cover
misalinement, damaged retaining ring seat, worn or
(37) opposite the crank end of the crankshaft.
damaged keyway, and damaged bearing mounting
Continue to turn the screw until the gear housing
seats; replace a damaged crankshaft.
cover with its assembled parts is freed from the gear
g. Inspect the gear housing and gear housing
housing (22). Remove the gasket (8).
cover for cracks, distortion, damaged gasket
d. Use a conventional gear puller having two 5/8 -
surfaces, damaged threads, and worn or scored
1 l-inch puller screws to pull the spur gear (10)
bearing seats. Check that oil passages to roller
from the crankshaft (13) ; remove the key (11).
bearing seats are open. Remove burrs and nicks
e. Remove the retaining ring (12) and press the
with a fine file or stone. Replace `a damaged gear
crankshaft (13) from the gear housing (22).
housing or cover.
Remove the retaining ring ( 14) and press the ball
Reassembly
bearing (15) from its seat in the gear housing.
a. Reassemble the pump gear case as shown in
f. Do not press the gearshaft (18) from the
internal gear (17) unless either part is damaged and
requires replacement.
b. When installing the ball bearing (36) in the
gear housing cover (37), press only against the
g. If the sleeve bearing (20) or roller bearing
outer race of the bearing. Make sure the bearing is
(21) requires replacement, pierce the expansion
plug (19) with a sharp punch and pry the plug from
fully seated in the cover.
the gear housing. Use a driver with a slightly
c. Press the roller bearing (34) and the sleeve
smaller outside diameter than the needle bearing
bearing (33) into the bearing bore of the gear
housing cover (37). Make sure that the shoulder of
and press the sleeve bearing and roller bearing from
the gear housing.
the sleeve bearing is fully seated against the cover.
d. When assembling the input shaft (29) and
h. After removing the eccentric housing (31)
bearing (27 ), press the one bearing tightly against
containing the input shaft assembly, remove the
the side of the pinion teeth. Secure the bearing in
retaining ring (26 ) and press the assembled input
place with Loctite bearing mount (manufactured
by Loctite Corporation, Newington, Connecticut,
eccentric housing.
as Part Number 18771-035). Install the spacer
i. Press the bearings 27) and spacer (28) from
the input shaft (29).
(28 ) and press on the second bearing. Seal it in
place with Loctite bearing mount. Make sure the
j. Pry the gease sea ( 3 0 ) from the eccentric
first bearing is rigidly against the pinion teeth and
housing (31 ).
that the second bearing holds the spacer tightly
k. If the sleeve bearing (33) and roller bearing
between the bearings. Allow the Loctite bearing
(34) in the gear housing cover are damaged, use a
mount to cure for 15 minutes to 4 hours before
sharp punch to pierce the expansion plug (32) in
assembling the parts into the bearing housing (31).
the cover and pry out the plug. Press the sleeve
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