OVERLOAD
PROTECTOR
10. Troubleshooting:
Item
Trouble
Cause
Step for Solution
1. Air supply was closed.
Open the air supply.
2. Exchange valve
○
37
caught by fur. Disassemble the pump for
cleaning then smear the grease.
3. Spring
○
13
broke.
Change the spring
4. Spool
○
11
caught.
Check if any damage happens
from the oil seal
○
26
and spool
○
11
.
Ⅰ Pump not work
5. Air pressure is too low or not
enough.
Adjust the air pressure to over 3
kgf/cm
2
1. Exchange valve
○
37
caught by fur. Disassemble the pump for
cleaning then smear the grease.
Ⅱ Air leak from the
pump
2. The O-ring
○
10
of the exchange
valve was damaged.
Change the O-ring.
1. Oil seal
○
26
damaged.
Change the oil seal.
The
pump
2. Inlet
valve
○
20
damaged or caught. Check if any damage happens
from the inlet base ○
24
and inlet
valve ○
20
.
3. Without enough oil in the oil tank.
Refill hydraulic oil，and let the air
drain.
4. Pilot valve
○
29
caught.
Check if any damage happens
from the pilot valve
.
Ⅲ Pump
nonstop
(highest
speed)
The
overload
valve
5. Air drain bolt
○
40
loosen.
Fasten the air drain bolt.
Piping
1. Oil leak out from outer piping.
Find out the leakage position then
fasten it.
2. Inlet valve
○
20
damaged.
Check if any damage happens
from the inlet base ○
24
and inlet
valve ○
20
.
The pump
3. The pressure valve automatically
adjusts pressure due to the air
pressure is too high now.
Adjust the air pressure to lower
than 5 kgf/cm
2
.
4. O-Ring
○
36
damaged.
Change the O-ring.
5. Pressure control valve
○
27
damaged.
Change the pressure control
valve.
Ⅳ
Pump
nonstop
(lower
speed)
The
overload
valve
6. Air drain bolt ○
40
not lock.
Fasten the air drain bolt.
2006.12.04
SANDSUN
6
