Alemite 7730 Service Manual - Page 9
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High-Pressure Bulk Grease Pump
23. Remove brass Bearing (34), Back-Up Ring (33), and
Seal (32) from the Barrel Assembly.
NOTE: Inspect the inside diameter of nylon
Wear Ring (31). Remove the Wear Ring if
rough or worn.
24. Remove Spacer (35) from the top of the Adapter.
25. Unscrew Primer Body (51) from Adapter (44).
26. Remove Primer Rod (43) [with attached components]
from the bottom of the Adapter.
27. Remove Stop Nut (50) from the Primer Rod.
• Place a small punch into the hole of the Primer Rod
to prevent its rotation.
28. Remove Plate (49), Gasket (29), Valve Seat (48), and
additional Gasket (29) from the Primer Rod assembly.
CAUTION
Support the Piston and Primer Rod assembly dur-
ing Roll Pin (42) removal. Damage to components
can occur.
29. Remove Roll Pin (42) that secures Adapter and Insert
assembly (41) to Primer Rod (43).
• Use a punch and a small hammer.
30. Unscrew the Primer Rod from the Adapter and Insert
assembly.
31. Remove Valve Body (47) and Guide Washer (45) from
the upper end of the Primer Rod assembly.
32. Remove Seal (46) from the Valve Body.
33. Unscrew the Adapter and Insert Assembly from
Piston (36).
34. Remove aluminum Gasket (40), Ball (39), Spring (38),
and Retainer (37) from the Piston.
Item No.
on Figure 2-A
9
O-Ring, 1-13/16 " ID x 2 " OD
10
O-Ring, 1-15/16 " ID x 2-1/8 " OD
11
O-Ring, 1/2" ID x 5/8 " OD
14
O-Ring, 1-3/16 " ID x 1-5/16 " OD
16
Seal, 13/16 " ID x 1-1/16 " OD
18
Seal, 13/16 " ID x 1-9/16 " OD
Alemite Corporation
Description
Table 4 Components Lubricated in Clean Oil
9
Clean and Inspect
NOTE: Use the appropriate repair kit for
replacement parts. Make sure all the compo-
nents are included in the kit before discard-
ing used parts.
1. Clean all metal parts in cleaning solvent. The solvent
should be environmentally safe.
2. Inspect all parts for wear and/or damage.
• Replace as necessary.
3. Inspect Piston (36) and Primer Rod (43) closely. Use a
magnifying glass to detect any score marks.
• Replace as necessary.
4. Closely inspect the mating surfaces of all check valve
components for any imperfections Ensure a smooth
and clean contact is obtained when assembled.
Assembly
NOTE: Prior to assembly, certain compo-
nents require lubrication in clean oil. Refer
to Table 4 for details.
Pump Tube Upper Packing
NOTE: Refer to Figure 4 for a section view
of the upper packing components.
1. Position Body (12) with the large diameter upward.
2. Install Spacer (15) into the Body.
• Make sure the Spacer centers and seats properly.
3. Install Seal (16) [lip end first] into Lantern Ring (17).
4. Install O-Ring (14) onto the top of the Lantern Ring.
5. Install the Lantern Ring assembly into the Body.
• Make sure the assembly centers and seats properly.
6. Install and seat Seal (18) [heel end first] into the Body.
Item No.
on Figure 2-B
24
O-Ring, 4 " ID x 4-3/8 " OD
31
Ring, Wear (Glass-Reinforced Nylon)
32
Seal, 0.925 " ID x 1.300 " OD
46
Seal, 0.650 " ID x 0.990 " OD
SER 7730
Description
Revision (8-01)