Pump Hoist and Power Ram
SER 7818-F5
Alemite Corporation
13
Revision (6-04)
3. Unscrew each Cap (10) from each Column.
• Use a drift and hammer.
4. Remove the entire Piston assembly from each Column.
5. Remove Bushing (13) from the Piston.
6. Remove Washer (11), Block-V Packing (12), and
O-Ring (14) from the Bushing.
7. Remove both Block-V Packings (17) from Piston (18).
8. Remove Pin (9) from Piston Rod (8) as required.
9. Unscrew Bolt (19) from the Piston Rod as required.
10. Remove Spacer (15), Gasket (16), Piston (18), and
additional Gasket (16) from the Bolt.
Clean and Inspect
1. Clean all metal parts in a modified petroleum-based
solvent. The solvent should be environmentally safe.
2. Inspect the bore of Column (20) for wear and/or
corrosion.
If the bore of either Column requires cleaning:
3. Unscrew Hose (59) from Union (46).
4. Remove the Bridge assembly from the hoist’s Base.
5. Detach the Base from its foundation.
6. Position the Base assembly to allow access to the
Column’s bore.
To clean the bore of the Column:
7. Attach a 3-1/4 “ (8.3 mm) diameter wire brush to a
tube or other suitable holder.
• Rotate the assembly during the cleaning process.
8. Remove any contaminants from within the Column.
Assembly
NOTE: Prior to assembly, certain compo-
nents require lubrication. Refer to Table 3
for details.
Prior to Overhaul
NOTE: The following procedures pertain to
the hoist’s cylinders and the Follower Plate.
Operate the hoist and allow the Follower Plate to
contact the Base.
HINT: Allow the Follower Plate to contact
a box or other suitable structure. The struc-
ture provides easier:
• removal of the bridge assembly from the Base, if
required
• detachment of the Follower Plate from the hoist
Overhaul
Prior to performing any maintenance procedure, the
following safety precautions must be observed. Personal
injury may occur.
WARNING
Release all pressure within the system
prior to performing any overhaul procedure.
• Disconnect the air supply line from the
control box.
• Into an appropriate container, operate the
pump’s control valve to discharge remaining
pressure within the system.
Never point a control valve at any portion of your
body or another person. Accidental discharge of
pressure and/or material can result in injury.
Read each step of the instructions carefully. Make
sure a proper understanding is achieved before
proceeding.
NOTE: Refer to Figures 2-A through 2-E
for component identification on all overhaul
procedures.
Hoist Cylinder
Disassembly
1. Remove Roll Pins (6) that secure Bridge (5) to Piston
Rods (8).
• Use a drift and hammer.
2. Rotate the Bridge assembly to expose the top of
Columns (20).
Item No.
Description
Type of Lubricant
11
Washer (Leather)
Gear Oil
12
Block V-Packing
14
O-Ring, 2-3/4 " ID x 3-1/8 " OD
17
Block V-Packing
20
Bore of Column
Mobilith AW-1
Table 3
Lubricated Components
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