Operating - Hydraulic PTO
Hydraulic PTO system.
For information on
the optional high power PTO system (Airtec) or non standard hydraulic
systems please see appendices.
Safety
-
Ensure PTO is disengaged before starting engine.
- The engine MUST be switched off before connecting the PTO or making any adjustments.
Operation
The PTO is
hydraulically driven, is fully independent and may therefore be
engaged at any time providing the engine revs are not too high. The
PTO controls are situated to the right of the seat and in front of
the gear lever. To engage the PTO move the control lever to the
left(as shown).
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PTO
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Setting PTO speed The hydraulic pump is geared so that 540 r.p.m. on the PTO is reached at a minimum engine speed of approx 1800 rpm. To set the PTO for 540, or indeed any other required speed, increase the engine speed to approx. 2000 rpm and adjust the speed with the knob adjacent to PTO control lever. The actual PTO speed can be read off the display of the RDS monitor (see appropriate manual). Turning the knob anti-clockwise will increase the speed and clockwise will decrease the speed. |
Once the speed is set, if the engine rpm is increased there will not be a significant increase in PTO speed. The PTO speed should never exceed 600 rpm For most spraying operations you will find it is not necessary to always run the PTO at 540 rpm. Lower PTO speeds result in reduced wear and tear in the spray pump and hydraulic system, a lower engine power requirement and can help to prevent foaming in the spray tank.
If the sprayer is fitted with a high capacity spray pump e.g. 4, 5 or 6 cyl. the PTO speed should be set as low as possible whilst spraying. Speeds in the order of 350 rpm for a 6 cyl. pump and 450 rpm for a 4 cyl. pump are normally more than adequate to achieve working pressure with excess flow left for agitation. Higher speeds may result in overheating of the hydraulic system. The PTO speed can then be increased to 540 after each load for quick-filling if required.
It is important to ensure that sprayer filters are kept clean and that self-cleaning filters are working correctly at all times. Failure to do so will result in loss of PTO speed and overheating of the hydraulic system.