11
4) Replacing suction and exhaust valves
A single exhaust valve
⑬
is located on the front of the pump head plates
③
and a single
suction valve
⑧
on the back of the pump head plates.
First loosen the small cap head screws (M3×5)
⑱
and remove the exhaust valve clamp
⑫
and exhaust valve .
Wipe the pump head plates clean, and replace the exhaust valves with new valves.
Lay the exhaust valve clamps
⑫
on the pump head plates and fasten them in place by
tightening the small cap head screws (M3×5) coated with LOCTITE 242 or LOCTITE 243
anti-loosening agent at 0.8 N
･
m torque.
Next loosen the small cap head screws (M3×5) and remove the suction valve and flat
washers.
Wipe the pump head plates clean, and replace the suction valves with new valves.
Lay the flat washers on the pump head plates and fasten them in place by tightening the
small cap head screws (M3×5) coated with LOCTITE 242 or LOCTITE 243 anti-loosening
agent for screws at 0.8 N
･
m torque.
*Make sure to attach suction and exhaust valves so that they completely cover the suction and
exhaust holes.
Exhaust
valve clamps
Exhaust
valve
Flat washer
Pump head plate
Suction valve
*Coat the bottom 2-3 threads of
the screws completely
* Do not coat the tip surface
LOCTITE coating amount
Fig.6.2
S
uction and exhaust valves
attachment
figure
