Jlg 40H Service Manual User Manual download pdf (Page 47)

SECTION 2 - PROCEDURES

3120240 – JLG Lift – 2-27

NOTE: These settings are factory set, Start Lockout, Fac-

tory Adjust and Overspeed. They are conformally

coated by P.G. and should not need to be reset.

Assuming that the Actuator and Controller are mounted,

the wiring is run and checked, and that the linkage is

properly installed, proceed as follows:

1. Turn ignition switch on. Do not start engine. Actuator

should kick toward max. fuel once, and then imme-

diately return to min. fuel. If not, see Troubleshoot-

ing.

2. Use multimeter to check battery voltage at battery

terminals, and record. Now check voltage at the

machine connection points for terminals A & B of the

8 pin connector on the E-331 (A is +, B is -). Voltage

reading should be the same as at battery. If not, shut

down, and correct wiring.

3. Hold the linkage back by hand, so as to control

engine speed manually. Start engine, set vehicle

controls to obtain High Engine speed, gradually

release the linkage, and adjust the speed-set as

needed to set the speed as desired. If engine speed

surges, reduce Gain a little, as required (CCW).

4. Re-check voltage between terminal A & B as in step

2. Voltage reading should be between 13.5 - 14.6

VDC.

5. Carefully adjust Gain. You are looking for the best

compromise between quick response and good sta-

bility. Make very small adjustments, then load and

unload engine, or pull linkage back slightly and

release. Usually, a good set-up is one that makes 1

to 3 small bounces and then steadies down after a

large change. Too much Gain shows up as a rapid

(once per second) instability, most commonly at

light loads. Too little Gain shows up in large over-

shoots on start-up or large load changes, and gen-

erally sluggish operation.

6. Make final adjustment to the High Engine Pot.

7. Set machine controls to obtain the mid-engine

speed. Adjust the mid-engine pot as needed to

obtain the speed desired.

8. The start lockout adjustment is factory set. If neces-

sary, he starter lockout pot may be adjusted to

obtain dropout of the starter as the engine attains

running speed. Normally this is around 500 RPM.

9. The overspeed adjustment is factory set. If neces-

sary, it may be readjusted to shut off ignition power

at a different engine speed by means of the over-

speed adjustment pot. The overspeed is simply to

shut down an over revving engine.

NOTE: Overspeed to be set at 4000 - 4500 RPM’s. This is

not a function we test for correct settings. The High

Engine speed must be set before setting the over-

speed.

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