Instruction Manual

POSTMASTER INSTALLATION

The safe operation of this equipment is the responsibility of the operator, who should be familiar

with the lifting process, the power unit and all safety practices before starting operations.

Attaching the Postmaster to the Power Unit

1. SWITCH OFF the power unit.

2. Attach the Postmaster to the digger using standard

mounting pins or a quick hitch. It is recommended to

mount the postmaster with the valve cover facing the

operator to aid visibility and allow easier hydraulic

connection.

3. Connect the auxiliary supply hoses together and flush

the system through for a minimum of 10 minutes to

ensure any debris is removed by the filter system of the

supply.

4. De-pressurise hydraulic systems using the

manufacturers approved techniques before connecting the Postmaster

5. Connect the Postmaster’s two ½” hydraulic feed hoses to the auxiliary hydraulic supply,

ensuring no debris gets on the connections.

Note: Hose size and condition of any quick couplers that are used will have an effect on

the efficient operation of the unit.

Note: If the weather is very cold, allow the oil to warm up before operating the vibrator.

The motor used has special seals which will tolerate back pressure up to 30BAR.

Forcing cold oil through quick couplers may exceed this limit and compromise

seal life.

Note: All hydraulic motors are sensitive to foreign objects in the hydraulic oil. Debris can

cause damage thus reducing the efficiency and output power of the motor.

6. Briefly operate the digger’s auxiliary circuit to test the Postmaster and ensure operation. DO

NOT run the vibrator without a post in the jaws.

Note: If there is an issue when operating the Postmaster and it only seems to be working

in one direction, there is an issue with the digger hydraulic flow. Most mini diggers

are equipped with an auxiliary double acting circuit but this can be modified when

using a breaker for example. This is done via a valve that is fitted to the machine

that changes the auxiliary circuit from Double Acting to Single acting. The valve

location varies but is commonly on the right hand side of the machine under a

cover, and should be set to the “Closed” position.

7. Once complete, lower the Postmaster unit to the ground while not in use.