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INTO POSITION BEGIN LIFTING OFF THE GROUND

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WITH the hoses connected, the next step is to
position the jack itself. You’ll want it fl attened as
much as possible to ensure an even lift. If lifting
a rear wheel, you need to position the bag under
the chassis or rock slider just in front of the
wheel. Front wheels will be the same, but behind
the wheel. In either case, ensure it’s in a location
that can support the full weight of the vehicle
without causing damage to fuel tanks, lines, or
the jack itself.

WHEN you’re happy with the bag position and

confi dent the 4x4 won’t roll away when lifted,

bump the gearstick into neutral and start the

engine. The 4x4 should be void of passengers, with

only the operator in the immediate area controlling

the ignition through an open window. Keep the

revs low to ensure a slow and controlled lift.

Adjusting the idle up will often blow the exhaust

bung out rather than speed up the process. Cut

the ignition when the bag makes contact with the

chassis and double-check that it’s lifting evenly.

ONCE you’ve ascertained that the lift is going as

planned, reach back into the 4x4 and re-start

the engine. The jack will begin taking the weight

of the 4x4, so it will require careful monitoring.

Most exhaust jacks can lift around two tonnes

but shouldn’t be fi lled with more than 10psi, so

if the bag stops lifting the 4x4 or appears fully

infl ated, cut the engine again. The one-way valve

in the hose will keep the bag infl ated even with

the engine off.