Holmatro GRA4321 Manual page 41

5.6 Operating the deadman's handle
The deadman's handle is used to determine the movement of the plunger(s). In the neutral position, no
pressure is built up. If the deadman's handle is released, it returns automatically to the neutral position
and stops the movement of the plunger(s).
• Hold the deadman's handle in the
is built up in the tool.
• Hold the deadman's handle in the
Pressure is built up in the tool.
5.7 Operating the light switch
On the carrying handle there is a light switch for the integrated LED lights.
• Press the light switch to turn the LED lights on and off.
• The battery for LED lights should be replaced when the LED lights no longer turn on when the light
switch is pressed.
5.8 Attaching accessories
5.8.1 Connection systems for accessories
By default the ram jack has ram heads on both sides. These ram heads can be removed and replaced
by accessories.
To connect these accessories a cam and steel ball connection system is used. The pulling shoes,
however, have a different connection system. They can only be attached and locked with a ring.
5.8.2 Cam and steel ball connection system
See Fig. 6.
The steel ball (C) in the groove (E) and the cam (A) serve to hold the accessory in place.
To attach
• Position the cam (A) of the accessory (F) in front of the recess (D).
• Push the accessory firmly on to the ram jack (B) until the steel ball (C) clicks in the groove (E).
• Turn the accessory 180° with respect to the ram jack so that the recess provides extra locking.
To remove
• Remove the accessory (F) from the ram jack (B) by turning it around while pulling it at the same
time. When the cam comes to the recess (D) the accessory is released.
5.8.3 Pulling shoes connection system
See Fig. 7.
WARNING
The pulling accessories are intended solely for the horizontal movement of loads.
Hoisting is not permitted with these pulling accessories.
To attach
• Remove the ram head or other accessory from the ram jack.
• Slide the ring (A) to the front of the pulling shoe (C).
GRA4321 / GRA4331
position to move the plunger(s) out of the cylinder. Pressure
position to move the plunger(s) back into the cylinder.
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