MacDon M155 Unloading And Assembly Instructions page 153

11. Start the engine.
12. Press HEADER UP switch (A) to raise the header to its
maximum height.
13. If one end of the header does NOT fully raise, rephase the
lift cylinders as follows:
a. Press and hold the HEADER UP switch until both
cylinders stop moving.
b. Continue to hold the switch for 3–4 seconds. The
cylinders are now phased.
NOTE:
It may be necessary to repeat this procedure if there is air in
the hydraulic system.
14. Engage the safety props on both lift cylinders:
a. Shut down the engine, and remove the key from the
ignition.
b. Pull lever (A) and rotate it towards the header to
release and lower safety prop (B) onto the lift cylinder.
c. Repeat the previous steps for the opposite lift cylinder.
262320
ATTACHING HEADERS
Figure 6.37: Ground Speed Lever
Figure 6.38: Safety Prop
137
A
A
B
Revision A