Disassembly (Fig. 70)
Pump oil out of cylinder into a drain pan by SLOWLY
moving rod and piston in and out of cylinder bore. Plug
ports and clean outside of cylinder.
Assembly (Fig. 70)
1.
1. Use a complete repair kit when rebuilding the cylin-
der. Put a coating of clean hydraulic oil on all new seals
and O--rings.
IMPORTANT: To prevent damage when clamping
cylinder in a vise, clamp only on pivotal ends. Use
of a vise with soft jaws is recommended.
2. InstallnewO--ringsandsealstothepistonandhead.
3.
Lubricate shaft with clean hydraulic oil. Slide head
ontoshaft.Installandtightenhead.Torqueheadfrom45
to 55 ft--lb (62 to 74 N--m).
2.
Mountcylinder inaviseso rodend ofcylinder istilted
up slightly. Do not close vise so firmly that cylinder tube
could become distorted.
4.
parts to ease assembly.
Put a coating of clean hydraulic oil on all cylinder
3.
Loosen head from tube:
5.
Slide rod assembly into cylinder tube.
A. Use a spanner wrench to rotate head clockwise
untiltheedgeoftheretainingringappearsinthetube
opening.
IMPORTANT: To prevent damage when clamping
cylinder in a vise, clamp only on pivotal ends. Use
of a vise with soft jaws is recommended.
B. Insert a screwdriver under the beveled edge of
the retaining ring to start the retaining ring through
the opening.
6.
cure head in barrel:
Mount steering cylinder in a vise with soft jaws. Se-
A. Align retaining ring hole in the head with the ac-
cess slot in the tube.
C. Rotatetheheadcounter--clockwisetoremovere-
taining ring from tube and head.
B. Insert the retaining ring hook into the hole and ro-
tate head clockwise until the retaining ring is com-
pletely pulled into the tube and the ring ends are
covered.
4.
ing motion to carefully extract piston, piston rod and
head from cylinder tube.
Grasp end of piston rod and use a twisting and pull-
IMPORTANT: Do not clamp vise jaws against piston
rod surface; the piston rod will become damaged.
C. Apply silicone sealer to tube access slot.
5.
and remove piston. Remove head from rod.
Securely mount piston, piston rod and head into vise
6.
Remove and discard all seals and O--rings from
head and piston.
7.
pressed air. Do not wipe parts dry with paper towels or
cloth. Lint in a hydraulic system will cause damage.
Wash parts in clean solvent. Dry parts with com-
8.
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.
Groundsmaster 4000--D
Page 4 -- 105
Hydraulic System
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
|---|---|
| Tags | Toro Groundsmaster 30412, Toro Groundsmaster 4000 D |
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| Document Type | Catalog |
| Language | English |
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