Toro Reelmaster 7000, Service Manual

Page: 163 / 315

Reelmaster 7000 Hydraulic System Page 4 -- 129
Disassembly (Fig. 97)
1. Remove oil from lift cylinder into a drain pan by slowly
pumping the cylinder shaft. Plug both ports and clean
the outside of the cylinder.
IMPORTANT: Prevent damage when clamping the
cylinder in a vise; clamp on the clevis only. Do not
close vise enough to distort the barrel.
2. Mount lift cylinder securely in a vise by clamping on
the clevis end of the barrel. Use of a vise with soft jaws
is recommended.
3. Carefully remove wiper (item 16) from the barrel tak-
ing care to not damage barrel. Slide wiper toward rod
clevis.
4. Remove retaining ring (item 15) from barrel. Slide re-
taining ring and support washer (item 14) toward rod cle-
vis.
5. Loosen head from barrel:
A. Use a spanner wrench to rotate head clockwise
until the edge of the retaining ring (item 12) appears
in the barrel opening.
B. Insert a screwdriver under the beveled edge of
the retaining ring to start the retaining ring through
the opening.
C. Rotate the head counter--clockwise to remove re-
taining ring from barrel and head.
6. Extract rod assembly with head and piston by care-
fully twisting and pulling on the rod clevis.
IMPORTANT: Do not clamp vise jaws against the
rod surface. Protect shaft surface before mounting
in a vise.
7. Mount rod assembly securely in a vise by clamping
on the clevis of the rod. Remove lock nut from the rod.
Slide piston, head, support washer, retaining ring and
wiper off the rod.
8. Remove and discard all seals and O--rings from the
piston and the head.
9. Wash cylinder parts in clean solvent. Dry parts with
compressed air. Do not wipe parts dry with paper towels
or cloth. Lint in a hydraulic system will cause damage.
10.Carefully inspect internal surface of barrel for dam-
age (deep scratches, out--of--round, etc.). Replace en-
tire cylinder if barrel is damaged. Inspect rod and piston
for evidence of excessive scoring, pitting or wear. Re-
place any damaged parts.
Assembly (Fig. 97)
1. Make sure all cylinder components are clean before
assembly.
2. Coat new seal kit components with clean hydraulic
oil.
A. Install new seals, wear band and O--ring to the
piston.
B. Install new seals, O--ring and back--up seal to the
head.
IMPORTANT: Do not clamp vise jaws against the
rod surface. Protect rod surface before mounting in
a vise.
3. Mount rod securely in a vise by clamping on the cle-
vis of the rod.
A. Coat rod with clean hydraulic oil.
B. Carefully slide wiper (item 16), retaining ring
(item 15), support washer (item 14), head assembly
and piston assembly onto the rod.
C. Clean threads on end of rod. Apply Loctite #271
(or equivalent) to rod threads.
D. Secure piston to rod with lock nut. Torque lock nut
from 35 to 45 ft--lb (48 to 61 N--m) .
4. Lubricate head and piston with hydraulic oil. Careful-
ly slide rod assembly into cylinder barrel.
IMPORTANT: Prevent damage when clamping the
cylinder’s barrel into a vise; clamp on the clevis
only. Do not close vise enough to distort the barrel.
5. Mount lift cylinder in a vise with soft jaws. Secure
head in barrel:
A. Align retaining ring hole in the head with the ac-
cess slot in the barrel.
B. Insert the retaining ring hook into the hole and ro-
tate head clockwise until the retaining ring is com-
pletely pulled into the barrel and the ring ends are
covered.
C. Apply silicone sealer to barrel access slot.
6. Slide support washer to top of head and then install
retaining ring. Make sure that retaining ring is fully
seated in slot in barrel.
7. Press wiper into barrel taking care to not damage
wiper.
Hydraulic System