Section 8
High Pressure Water System
20479291
2-2012/Rev 04
8-19
Severe injury can result if the machine is not properly locked out. Observe
electrical Lockout/Tagout procedures before proceeding.
Ensure all pressure is relieved or blocked from the hydraulic and high pressure
circuits before proceeding.
2. Disconnect the high and low pressure water piping, following the procedure, High and
Low Pressure Water Piping.
3. Remove the proximity switch on the end of the hydraulic cylinder to be serviced. This
will allow the hydraulic oil to drain back to the reservoir, minimizing oil spillage. It will
take approximately five minutes for the oil to drain.
4. Remove the high pressure cylinder assembly, following the procedure, High Pressure
Cylinder Assembly Removal.
5. Use a flat screwdriver to remove the retaining ring from the hydraulic cylinder head.
6. Remove the bushing retainer flange and clean the surfaces, weep holes and grooves.
Check the retainer flange for cracks.
7. Replace the proximity switch by positioning the o-ring spacer and the switch. Apply
JL-M grease to the threads on the socket head screws and tighten, following the torque
specifications in Table 8-1.
It is recommended that the proximity switch be reinstalled as soon as practical.
Removal of the switch presents the potential of an oil spray hazard.
Ensure that the proximity switch is properly installed and secured prior to starting
the machine. Failure to tighten the two hold down screws on each switch will
result in the spray of hydraulic oil.
8. Remove the collet from the plunger removal tool and thread the large end of the tool onto
the hydraulic cartridge seal and pull the cartridge out, over the plunger.
To Next Page
Loading...
Need help?
General
