Hitachi 1800 ユーザーズマニュアル

1.

Engage trigger lock.

2.

Shutoff the pump:

a.

For air-powered pumps, close the bleed-type 

master air valve. 

b.

For hydraulic-powered pumps, close the supply 

line shutoff valve (U) first, then close the return 

line shutoff valve (V).

3.

Disengage the trigger lock.

4.

Hold a metal part of the gun firmly to a grounded 
metal pail. Trigger the gun to relieve pressure.

5.

Engage the trigger lock.

6.

Open all fluid drain valves in the system, having a 
waste container ready to catch drainage. Leave 
drain valve(s) open until you are ready to spray 
again.

7.

If you suspect the spray tip or hose is clogged or 
that pressure has not been fully relieved after follow-
ing the steps above, VERY SLOWLY loosen tip 
guard retaining nut or hose end coupling to relieve 
pressure gradually, then loosen completely. Clear 
hose or tip obstruction.

Always engage the trigger lock when you stop spraying 
to prevent the gun from being triggered accidentally by 
hand or if dropped or bumped.

1.

Connect the suction kit (T) to the pump's fluid inlet, 
and place the tube into the fluid supply. 

2.

Prepare the pump’s power source:

a.

For air-powered pumps, close the air regulator 

(F). Open the pump's bleed-type master air 

valve (E). 

b.

For hydraulic-powered pumps, check the 

hydraulic fluid level before each use, and add 

fluid as necessary. Close the supply line shutoff 

valve (U) and the return line shutoff valve (V). 

Start the hydraulic power supply.

3.

Hold a metal part of the gun (S) firmly to the side of 
a grounded metal pail and hold the trigger open. 

4.

Start the pump:

a.

For air-powered pumps, slowly open the air reg-

ulator until the pump starts. 

b.

For hydraulic-powered pumps, open the return 

line shutoff valve (V) first, then slowly open the 

supply line shutoff valve (U).

Trapped air can cause the pump to cycle unexpectedly, 
which could result in serious injury from splashing or 
moving parts.