MMD Equipment 185S-5C2 part 2 - Manual (Page 15)

5. Periodic Inspection/Maintenance
5-15
A100114
5.5.22 Check O-ring and Needle Valve of Auto-relief Valve and Vaccume relief valve
[3,000 hours or every 3 years ]

When reassembling, apply sufficient grease to O-ring Slot/O-ring and sliding surface.
Use CALTEX MULTIFAK EP1 grease or equivalent. Grease of poor quality will deteriorate the material.
 Disassemble and clean the component,
and check O-ring“1”, “2”,“3”and
needle valve“4”. Then, replace O-ring
“
1”, “ 2”, “ 3” and rubber on the needle
valve“4”, if hardened.
(See 5.4)
 Replacement of O-ring requires expert
technical knowledge.
So contact directly us or distributor.
5.5.23 Performance Check of Pressure Control Valve
[3,000 hours or every 3 years ]

When reassembling, apply sufficient grease to O-ring Slot/O-ring and sliding surface.
Use CALTEX MULTIFAK EP1 grease or equivalent. Grease of poor quality will deteriorate the material.
<Procedure>
① When fully opening the air valves while the
machine is running, make sure that the
discharge pressure gauge shows the figure
between 49-68psi(3.4-4.7bar).
② When the pressure is lower than 49psi( 3.4 bar) ,
replace spring“3” with a new one. （See 5.4）
③ When the indicator shows excessively higher
pressure, you will find that the piston does not
move smoothly due to foreign material and rust
stuck inside valve. In such a case, disassemble
the component for checking and cleaning.
1
2
3
4
1
2
3
4
A070339
1
2
3
4
1
2
3
4
Auto-relief valve
Vaccume relief valve