Jump-Starting an Engine with Booster Cables
Position the vehicle with the booster battery adjacent to the vehicle with the discharged
battery so that booster cables can be connected easily to the batteries in both vehicles.
Make certain vehicles do not touch each other.
Jump-Starting Procedure
1. On both vehicles turn off all electrical loads. Set the parking brake. Place transmission
in “NEUTRAL”.
2. Determine whether the discharge battery has the negative (-) or positive (+) terminal
connected to ground. The ground lead is connected to the engine block, frame, or
some other good metallic ground. The battery terminal connected to the starter relay
is the one which is not grounded. Terex Cranes are always shipped with the negative
(-) as ground.
3. Be sure that the vent caps are tight and level on both batteries. Place a damp cloth
over the vent caps of each battery making certain it is clear of fan blades, belts and
other moving parts.
The following steps must be performed in sequence.
4. On a negative grounded system, connect both ends of one cable to positive (+)
terminals of each battery.
5. Connect one end of the other cable to negative (-) terminal of the booster battery.
6. Connect other end of cable, away from battery, to engine block, frame or some other
good metallic ground, except carburetor or tubing on vehicle with discharged battery.
7. Make certain that all cables are clear of fan blades, belts and other moving parts of
both engines and be sure everyone is standing away from vehicles. Then start the
engine with the booster battery. Wait a few minutes, then attempt to start the engine
of the vehicle with the discharged battery.
8. After starting, allow the engine to return to idle speed and remove the cable
connection at the engine block or good metallic ground. Then remove the other end of
the same cable from the booster battery.
WARNING - BATTERIES PRODUCE EXPLOSIVE GASES. These instructions are
designed to minimize the explosion hazard. Keep sparks, flames, cigarettes, etc.
away from batteries at all times - protect eyes at all times - do not lean over
batteries during this operation.
Both batteries should be of the same voltage.
Operating Instructions
90 P/N 12261-319 REVISED: August 2012
Courtesy of Crane.Market
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