3.4 Priming the system
BEFORE engaging the PTO follow these steps :
1. Fill the tank with the recommended hydraulic oil, until
the oil reaches the YELLOW mark of the gauge.
2. Non-spill (dry-break) couplings must be fully connected.
Failure to do so can damage the hydraulic motor seals.
3. Have a container of suitable hydraulic oil available to
refill the reservoir as necessary. DO NOT OVERFILL.
NOTE
Do not fill the reservoir while the hydraulic system is
running. The level drops during operation and returns
to the full level when not in operation.
4. Make sure the driven cargo pump (or compressor) is
vented and cannot develop pressure.
NOTICE
THE FOLLOWING SYSTEM PRIMING INSTRUCTIONS MUST
BE FOLLOWED TO AVOID ENTRAPPING AIR.
1. Depress the clutch and engage the PTO. Release the
clutch slowly. After approximately 2 seconds depress
the clutch and disengage the PTO.
2. To insure that all system components, hoses and fittings
are completely filled with hydraulic oil, crack the return
connection 3 at the hydraulic block allowing any trapped
air to escape.
3. During the priming procedure, insure that the hydraulic
oil does not drop below the RED mark of the gauge.
4. Operate any system selector valves and directional
control valves to insure that all hoses and fittings are
free of air.
5. Repeat steps 1 through 4 until system is fully primed.
6. Secure the hydraulic block return connection 3.
3.5 Engaging hydraulic motor
1. Move the system ON/OFF control valve and any directional
valves to the correct position for running the hydraulic
motor.
2. Increase tractor engine rpm to the required operating
speed.
NOTICE
DO NOT OVERSPEED THE TRACTOR ENGINE, AS THIS WILL
CAUSE SERIOUS DAMAGE TO SYSTEM COMPONENTS.
3. Inspect the hydraulic system for leaks. If any leaks are
present, shut down the system immediately and repair
as necessary. Return to the § PRIMING THE SYSTEM.
4. Following the procedure provided in the § SETTING FAN
SPEED, check the fan to verify the factory setting.
5. Using an optical tachometer, check the speed of the
driven unit. On engine-driven pump arrangements,
insure the engine speed is governed to prevent
overspeeding of the driven unit(s).
NOTICE
THE HYDRIVE MUST BE FREE OF VIBRATION, HYDRAULIC
OR MECHANICAL, WHEN IN OPERATION, OR SERIOUS
DAMAGE TO THE COMPONENT PARTS WILL OCCUR.
Badly connected return line couplings will damage the hydraulic
motor seals. Ensure the outer sleeve is fully seated in the direction
shown.
Figure 5
Coupling connection
Ensure both halves of the couplings are clean.
WARNING
SET THE VEHICLE EMERGENCY
BRAKE BEFORE ENGAGING THE PTO.
Hazardous machinery
can cause severe
personal injury or
property damage.
9/16
NT 206-A00 09 18 Hydrive e
3. INSTALLATION (continued)
