18
391 3784 028
4
WASHER
17
391 2884 050
2
SEAL,SQ-R
16
391 2883 167
2
SEAL,BK-UP
15
391 2883 166
2
SEAL,CHAN
14
391 2883 058
1
SEAL, LIP
13
391 2686 063
1
RING,SNAP
12
391 2185 056
2
THRPL
11
391 2181 999
1
NAME PLATE
10
391 2082 032
4
PIN,DOWEL
9
391 1781 085
1
KEY
8
391 1432 004
2
SCREW,DRIVE
7
391 1401 088
4
CAP SCREW
6
391 0482 306
2
BUSHING
5
391 0381 040
1
BRG,BALL
4
324 2910 630
1
MATCHED GEAR SET
3
324 8110 100
1
GEAR HOUSING
2
324 3012 377
1
HOUSING, GEAR
1
324 5123 201
1
SHAFT END COVER
ITEM
PART NUMBER
QTY
DESCRIPTION
10
2
7
18
16
15
12
17
9
4
10
1
14
16
15
17
12
10
3
5
13
10
Cautions:
During disassembly, use extreme caution when prying apart castings. The marring of machined surfaces
could cause leakage. Excessive use of force can result in misalignment and seriously damage parts.
Disassembly Instructions:
1. Clamp the pump in a vise, with the drive shaft pointing down, on the mounting flange.
2. Scribe a line across each casting in the assembly. This ensures proper alignment during reassembly.
3. If the pump has a key type shaft, remove the key from the drive gear. Lightly stone any burrs that
may be on the shaft to prevent any damage to the seal during disassembly.
4. Remove all the bolts and washers from the assembly.
5. Remove the rear port end cover.
6. Remove the thrust plate by hand. Do not pry. The channel seals can remain in the thrust plate
groove.
7. Carefully remove the gears from the gear housing. Keep gears together because they are a matched
set.
8. Carefully remove the second thrust plate by hand from the shaft end cover surface. Keep the channel
seals in the thrust plate groove.
9. Lift the gear housing from the shaft end cover. Keep the gasket seals in the gear housing groove.
10. Important: PGP350 series only and some other, older 300 series pumps. Some units have two holes
in the face of the shaft end cover. Mark the hole that is without a plug.
Instructions:
Change of Rotation
and Seal Replacement
(PGP300 Series)
Parker Hannifin Corporation
Gear Pump Division
1775 Logan Avenue
Youngstown, Ohio 44501
Tel: (330) 746-8011 Fax: (330) 746-1148
http://www.parker.com/gearpump
