MacDon PW8, Operator'S Manual

Page: 258 / 304

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244
Revision A
Figure 5.178: Left Side Master Cylinder
5. Position rod end of cylinder (A) and safety prop into
cylinder support bracket, and secure with the shorter
clevis pin (B). Ensure clevis pin head faces outboard.
6. Secure clevis pin (B) with washer and cotter pin (not
shown).
7. Lift hold-down arm (C) until clevis pin (D) can be
installed through lift arm and barrel end of cylinder.
Ensure clevis pin head faces outboard.
8. Secure clevis pin (D) with washer and cotter pin (not
shown).
9. Secure hoses with cable ties (not shown).
10. Remove previously inserted block of wood.
11. Bleed cylinders and lines. Refer to 5.9.4 Bleeding Cylinders and Lines, page 247 .
12. Close the left endshield. Refer to 3.3.2 Closing Left Endshield, page 30 .
5.9.3 Replacing Slave Hold-Down Cylinder
The hold-down is raised and lowered by a master and slave single-acting hydraulic cylinder. The slave cylinder is
located at the right end of the hold-down and is connected to the master cylinder by a hose that passes through the
hold-down beam.
Cylinder operation is adversely affected by air in the system and cylinder seal failure. Remove, repair, or replace
cylinders if either of these issues arise.
Removing Slave Cylinder
1. Lower the header and hold-down completely. Continue pressing the hold-down lower switch for 5
–
10 seconds
to remove any pressure in the system.
DANGER
To avoid bodily injury or death from unexpected startup of machine, always stop engine and remove key
from ignition before leaving operator
’
s seat for any reason.
Figure 5.179: Right Side Slave Cylinder
2. Stop the engine and remove the key from the ignition.
3. Remove cotter pins and washers from clevis pins (B)
and (D).
4. Raise hold-down (C) by hand, use a prop device to
support hold-down and take the weight off the
cylinder (A), and remove clevis pin (D) at barrel end of
cylinder. Cylinder will drop free from hold-down arm.
MAINTENANCE AND SERVICING