Environmental Information - Holmatro GRA 43 Serie Manual

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6.3.2

Operating the ram jack

The plungers open and close quickly until they encounter resistance. Now the pump will build up the

required pressure and continue with spreading or pulling.

DANGER

Danger of crushing or pinching parts of the body.

Note that ram jacks have an enormous power. Use only genuine Holmatro accessories and

no other fasteners or chains.

Spreading

WARNING

Prevent sharp objects from touching the plungers.

If a ram head, a conical tip or a wedge piece is used, never apply too much force; otherwise

the accessory will disappear through the opening created and the plunger can be damaged.

CAUTION

Never use more than one extension pipe at the same time.

Always use a ram head or other accessory on the other end of the extension pipe.

Avoid a crooked load with its risk of sliding off.

Watch out for the danger of being trapped when the plungers are retracted between cylinder

and accessory.

•

Make sure that a ram head or other desired accessory is attached correctly at the end of the

plunger(s) and the fixed side.

•

Place the ram jack between the parts that must be spread.

•

Force the parts apart by opening the plunger(s).

Pulling

WARNING

The pulling accessories are intended solely for the horizontal movement of loads.

Hoisting is not permitted with these accessories.

WARNING

Make sure that the load is always supported from underneath. Continuously check the

behaviour of the load. Make sure that the tool can move freely during pulling and always

remains in a straight line between both pulling shoes.

•

Remove the ram head or other accessory from the ram jack.

•

Place the pulling shoes correctly. The shortening hooks point with their openings upward.

•

Attach the pulling chains to the objects so that they cannot slip off.

•

Pull the pulling chains tight and hook them to the pulling shoes.

•

Retract the plunger(s) fully.

6.3.3