Service Manual

Reelmaster 6500–D/6700–D
Page 4 – 65
Hydraulic System
Rear Lift Cylinders
1
2
3
4
5
6
7
8
9
10
11
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12
Figure 41
1. Grease Fitting 6. O–Ring 11. Head
2. Barrel Assembly 7. Shaft w/Clevis 12. Dust Seal
3. Nut 8. Rod Seal 13. Collar
4. Uni–Ring 9. O–Ring
5. Piston 10. Backup
IMPORTANT: To prevent damage when clamping
the cylinder barrel in a vise, clamp only on the pivot
end. Do not clamp the vise jaws against the smooth
shaft surface. Protect the shaft surface before
mounting in the vise.
1. After removing cylinder, pump oil out of cylinder into
a drain pan by SLOWLY moving piston in and out of cyl-
inder bore.
2. Plug ports and wash outside of cylinder with cleaning
solvent.
3. Mount cylinder in a vise so shaft end of cylinder is
tilted up slightly. Do not close the vise so firmly that the
barrel could become distorted. Unscrew collar.
4. Grasp clevis end of shaft and use a twisting and pull-
ing motion to carefully extract piston, shaft, and head
from barrel.
5. Securely mount clevis end of shaft in a vise and re-
move nut from piston end of shaft. Remove piston. Slide
head off of shaft.
6. Remove and discard all seals and backup rings.
7. Wash the parts in cleaning solvent. Dry parts with
compressed air. DO NOT wipe dry with a cloth or paper
as lint and dirt may remain.
8. Inspect internal surface of barrel for damage (deep
scratches, out–of–round, etc.). Inspect head, shaft and
piston for evidence of excessive scoring, pitting, or
wear. Replace any defective parts.
9. To install the two piece Uni–ring piston seal:
A. Soak seal rings in hot water so they will stretch
over the piston.
B. Apply hydraulic oil to black inner ring and install
ring into seal groove on piston.
C. Apply hydraulic oil to purple outer ring and install
ring into same groove over black ring.
10. Put a light coating of hydraulic oil on all other new
seals and backup washers. Install the new seals and
backup washers. Install head onto piston rod. Install pis-
ton onto shaft and tighten lock nut.
11. Put a heavy coating of hydraulic oil on all cylinder
parts to ease assembly. Slide shaft assembly and head
into barrel. Install collar to secure assembly in barrel.
Hydraulic
System