Preventive maintenance
66 810770 Operator Manual Echion
Repair the high-pressure cylinder, the check valve, and the low-pressure poppet
1. Disassemble and examine the cylinder and the check valve.
2. Disassemble the cylinder locator tool and the seal installation tool.
3. Put the high-pressure cylinder on the seal locator tool. Make sure that the spacer tube is inside
the cylinder.
Repair the high-pressure cylinders every 500 hours.
Repair the check valves and the low-pressure poppets every 500 hours.
Replace the high-pressure seal cartridges every 500 hours.
Replace the low-pressure poppets and seats every 1,000 hours.
Replace the high-pressure cylinders every 3,000 hours or if the cylinder is chipped or cracked.
Replace the check valve assemblies every 3,000 hours.
CAUTION
Debris in the cylinder can cause the seals or the poppets to fail.
This procedure is for a moderately worn check valve. Replace very worn components.
1
Check valve body
2
Low-pressure poppet
3
Check valve wear ring
4
Poppet retainer
5
Low-pressure poppet screw
6
Spacer tube
7
High-pressure cylinder
8
High-pressure seal cartridge