Binks GEMS, Maintenance & Repair Manual

Page: 28 / 38

28/38 77-2985-R0.5
EN
10.6: Rod Seal Replacement Procedure
If hardener becomes visible in the oil reservoirs the rod seals should be replaced.
First ensure that the system is powered off and disconnected from the electrical power source.
Completely de-pressurize the system by following the
System Depressurization Procedure in
77-2984 Operations Guide . Use all parts from the 240-3170-200 repair kit. Do not re-use any
seals or parts intended for replacement.
1. Remove the fluid panel shroud to gain access to the pump. Disconnect the hardener
supply line from the B Pump inlet.
2. Disconnect the high pressure hose from the elbow fitting (35) from the outlet of the pump.
3. Disconnect the pressure sensor cables by unscrewing and unplugging the connectors.
4. All air pressure should already be removed from the system. Disconnect the 5/32” air
trigger lines connected to the 4 pump color change valves.
5. Remove the 4 screws that hold the pump coupling (15) together. Remove the pump
coupling halves. Support the fluid section of the pump and unscrew the swivel nut (11)
connecting the piston rod (33) with the motor threaded rod (3). Move the pump to a clean
workbench.
6. Unscrew the four clamping screws (37) from the bottom block. Remove the bottom block
(25).
7. Remove the cylinder (26) to access the piston. Remove the pump rod adapter (32) and
jam nut (16) to slide the rod out of the top block (19).
8. Thoroughly inspect all parts for damage, especially the running surfaces of the rod and
cylinder. Carefully and thoroughly clean all parts with a compatible solvent, using rags and
soft brushes.
9. Remove the retaining clip (23) so the washer (22) and inner seals can be pressed out with
the large dowel supplied with the repair kit (102-2510). Note the orientation of the two that
will be removed.
10. Lubricate and replace the rod seals (31) with the open end of the cup facing downward.
Re-install the seal holder (28) with a new o-ring (17). Install the washer (22) and a new
retaining clip (23) before reinserting the piston rod.
11. Lubricate new cylinder O-rings (18) and reinstall the cylinder (26) to the top block (19),
then install the bottom block. Use the four screws to clamp the cylinder and two blocks
together. Reattach the pump rod adapter and nut so the pump can attach to the drive.
12. Replace the pump coupling, using the pins and grooves in the coupling to align the pump
to the control enclosure.
13. Replace the air lines, fluid connections, and cables.