Wheel Width; Ballast Weight; John Deere Conversion Kit (81- 30- 059) For Si Models - Alamo PA92 Operator's Manual

ASSEMBLY

Wheel Width

Set wheel widths as wide as possible.

Ballast Weight

Tractor must be stable while operating the hedge cutters under all conditions. Pay attention when operating on
slopes. Front end ballast as well as rear wheel weights to counterbalance the overhang of the flail head should
be added as appropriate. On steeply banked ground, it may not be sufficient to depend alone on the
counterweight provided by the oil reservoir.
In addition, rear wheel track should be set as wide as possible to increase stability. It will also increase the
protection to the reservoir.

JOHN DEERE CONVERSION KIT (81- 30- 059) for Si Models

The John Deere utilizes a "closed center" hydraulic principle and because of this, it is necessary to modify
either the tractor's external oil supply or the flails main control valve.
There are the following two alternatives.
1. A flow limiting valve manufactured by John Deere is available to provide an "open center" external supply.
For further advice consult your John Deere dealer.
2. A control valve conversion kit (Part No. 81-30-059) consists of a relief valve blanking plug which should be
installed in place of the existing relief valve and a pressure gallery blanking plug which is installed in place of
the standard blanking plug at the valve outlet end next to the lift ram gland connection.
Be careful when extracting the relief valve not to damage the copper sealing washer as it is reused.
When working in this mode, the tractor's pressure control valve must not exceed 2500 PSI (170 Bar).
PA92 04/09 Assembly Section 3-4
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