KEENAN MechFiber 250 and
280 Operator’s Manual
16
Revision C01, 04
th
Dec 2019
Hydraulic and brake hoses
Operation
Colour
Guillotine door
Red & yellow
Feed-out tray
Blue
Brakes
White
Beetgrid
Black
Table 1: Hydraulic and brake hoses
Note:
A: The design life of hydraulic hoses is subject to the level of wear and tear/usage and also
factors like harsh climate. It is recommended that they be reviewed periodically (yearly) and
typically replaced after ten years of operation if necessary.
B: The maximum oil pressure of the hydraulic system is 3000 psi.
C: If there is a
valve chest
fit to the machine, it is essential to connect the valve chest hydraulic
feed and return pipes correctly. The return pipe is not designed to take the hydraulic pressure
normally seen in the valve chest feed pipe, and so seals and/or the valve chest itself may be
damaged if oil flows in the wrong direction through the chest. Typically, the hydraulic return
pipe on the valve chest is fitted with a one-way flow valve to prevent oil being fed to the valve
chest in the wrong direction. This is identifiable as a steel connection on the end of the pipe
with an arrow stamped on its side to indicate the direction of oil flow through it. Oil flows into
the valve chest through holes marked P (Pressure) and out through holes marked T (Tank),
see Figure 5 below.
(The valve chest is set up for open centre hydraulics. If the tractor has an alternative hydraulic
system (other than open centre), then contact should be made with the tractor agent. To alter
to closed centre hydraulics, there is a plug that can be fitted to the spool valve block and is
available from KEENAN Service on request.)
Figure 5: Valve Chest
P
T
