12
OPM-136/D
4. Couple the tractor to the generator with the drive shaft
(tumbling bar). Couple the tumbling bar to the generator
input shaft first, then to the power take-off shaft. Check
alignment, tractor, power take-off shaft (tumbling bar),
and the generator input shaft should form a straight (or
nearly straight) line, with less than 5 degrees
misalignment between the shafts Misalignment will
cause generator output voltage to flicker.
CAUTION:
Make sure that all tumbling bar lock pins are engaged and
that all safety shields are in place before operating the PTO
generator.
5. Make sure no binding exists in generator or gearbox. If
binding is found, locate the cause and correct it before
proceeding.
6. Make sure that the electrical loads to be driven by the
generator will not draw more current than the ratings of
the generator receptacle or cord set which will supply the
current.
7. Check all electrical connections in the system to be
energized by the generator. Make sure the connections
are correct and are tight.
8. Make sure all loads are turned off. Do not start generator
under load.
PRE-START CHECKS
WARNING: PERSONAL INJURY
When working on or around these generators, do not
wear loose fitting clothing or any articles that may get
caught in moving parts.
1. Visually inspect the generator. Check for:
A. Correct mounting
B. Physical damage
C. Debris in cooling vents and screens (could cause
generator to overheat)
IMPORTANT: The manufacturer recommends that, if the
generator has been stored for any length of time, before
using it, the operator removes the control box cover and
cooling fan screen. Then inspect the generator for rodent
nests or other objects that could cause the generator
binding and/or overheating. See “cleaning portion of the
Maintenance section.
2. Check gearcase oil level by removing the plug located on
the backside of the gearcase marked “OIL LEVEL”. To refill
oil, see LUBRICATION in the MAINTENANCE section in
this manual.
NOTE: Either too little or too much oil can harm the
equipment.
3. Make sure the drive shaft (tumbling bar) is assembled
with its universal joint knuckles “synchronized”. If the
knuckles are not synchronized, the bar will chatter when
rotating, which will cause the generator output voltage
to flicker.
DANGER: PERSONAL INJURY
Power take-off must be DISENGAGED at this time.
0" --
1
Oil Level Plug
Page 6
60706-199
1005-00
7. Check all electrical connections in the system to be ener-
gized by the generator. Make sure the connections are cor-
rect and are tight.
8. Make sure all loads are turned off. Do not start the genera-
tor under load.
GENERATOR STARTING PROCEDURE
1. With the power take-off drive disengaged, start the engine
which will drive the generator. Run the engine long enough
to warm it up before proceeding, so that it will run smoothly
and achieve full power under generator load.
2. With engine idling, engage the power take-off drive.
3. Watch the voltmeter on the generator and slowly increase
engine speed until the output reaches approximately 260
volts, in green portion of voltmeter scale.
4. With engine and generator running smoothly, switch on
the electrical load while watching the voltmeter.
NOTE: Equipment Damage
If the load includes motors turn them on one at a time, highest
starting current motor first, next highest second, etc.
Readjust engine throttle to keep generator output under load
at 240V (in green portion of voltmeter scale). If engine is
equipped with speed governor, it may automatically readjust
the throttle as the load changes and keep the generator output
at the proper level. However, some governors are not sensitive
enough to maintain proper output under changing load, and in
such cases the throttle will have to be manually readjusted .
GENERATOR SHUTDOWN PROCEDURE
1. Switch off electrical load.
2. Reduce speed of engine driving generator to idle.
3. Disengage power take-off drive, and allow generator to
coast to a stop.
WARNING: Personal Injury
Never try to manually stop the generator. Always let it coast
until it stops.
5. Shut off the engine.
4. Disconnect drive shaft (tumbling bar)
power take-off end first, then generator end.
Figure 6
Figure 7
3. Make sure the drive shaft (tumbling bar) is assembled with
its universal joint knuckles “synchronized,” as illustrated in
Figure 7. If knuckles are not synchronized, the bar will chat-
ter when rotating, which will cause the generator output
voltage to flicker.
DANGER: Personal Injury
POWER TAKE-OFF MUST BE DISENGAGED AT THIS TIME.
4. Couple the tractor to the generator with the drive shaft (tum-
bling bar). Couple the tumbling bar to the generator input
shaft first, then to the power take-off shaft. Check align-
ment, tractor, power take-off shaft (tumbling bar), and gen-
erator input shaft should form a straight (or nearly straight)
line, with less than 15° misalignment between the shafts.
Misalignment will cause generator output voltage to flicker.
CAUTION:
Make sure that all tumbling bar lock pins are engaged and
that all safety shields are in place before operating the PTO
generator.
5. Make sure no binding exists in generator or gear box. If
binding is found, locate the cause and correct it before pro-
ceeding.
6. Make sure that the electrical loads to be driven by the gen-
erator will not draw more current than the ratings of the
generator receptacle or cord set which will supply the cur-
rent.
