Kobelt 7012 Series, Owner'S Operation, Installation & Maintenance Manual

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Helm pump-7012 Kobelt Manufacturing Co. Ltd.
Rev A MNL-7012 13 of 32
Allow a period of several hours for any air bubbles in the system to group together and then
repeat the hard over to hard over procedure.
While there is still air trapped in the system, the pump may be quite stiff to turn and on
reversing the wheel, there is quite a distinct noise as the lock valve moves across. Once air is
out of the system, the pump should turn smoothly, and the lock valve will move quietly from
one side to the other on reversing the rotation of the wheel.
6.1.2 Filling a Two Station System
1. Fill the system from the top Helm Pump or Header Tank.
2. At the lower helm, follow steps (3) to (15) in section “Filling a Single Station
System”, keeping
a head of oil at the top pump.
Do not use other types of fluids such as automotive transmission
fluid or brake fluid. They contain additives that are harmful to oil
seals used in steering systems.
All hydraulic lines in the steering system must be thoroughly
cleaned prior to filling the system. Ensure all hydraulic lines are
secured and fittings are tight.
6.2 C
ALIBRATION AND
A
DJUSTMENT
The Kobelt Model 7012 helm pumps outputs are adjustable. These Helm Pump have a variable
output. This enables the pump to be set at the optimum number of turn’s hard over to hard
over, either during or after installation.
Increasing the output of the pump decreases the number of turn’s hard over to hard over. The
lower the number of turns, the stiffer the steering will feel. Larger diameters of wheel may be
necessary at full pump output, depending on cylinder size. Consult our distributor or dealer.
Decreasing the output of the pump increases the number of turn’s hard over to hard over. The
steering will become lighter with the increased number of turns and this should allow the use
of small diameter wheels.
To increase output, Turn the screw clockwise
To decrease output, Turn the screw counter clockwise