Groundsmaster 4100--D/4110--D Hydraulic SystemPage 4 -- 115
Disassembly (Fig. 78)
1. Pump oil out ofcylinder into adrainpan by SLOWLY
moving rod and piston in and out of cylinder bore. Plug
ports and clean outside of cylinder.
IMPORTANT: To prevent damage w hen clamping
cylinder in a vise, clamp only on pivotal ends. Use
of a vise with soft jaws is recommended.
2. Mountcylinderinavisesorodendofcylinderistilted
up slightly. Do not close vise so firmly that cylinder tube
could become distorted.
3. Loosen head from tube:
A. Use a spanner wrench to rotate head clockwise
untiltheedgeoftheretainingringappearsinthetube
opening.
B. Insert a screwdriver under the beveled edge of
the retaining ring to start the retaining ring through
the opening.
C. Rotatetheheadcounter--clockwisetoremovere-
taining ring from tube and head.
4. Grasp end of piston rod and use a twisting and pull-
ing motion to carefully extract piston, piston rod and
head from cylinder tube.
IMPORTANT: Do not clamp visejawsagainstpiston
rod surface; the piston rod will be damaged.
5. Securely mount piston, piston rod and head assem-
bly into vise with soft jaws.
6. Remove set screws thatsecure piston to piston rod.
Removepistonfrompistonrodandthenslideheadfrom
rod.
7. Remove and discard all seals and O--rings from
head and piston.
CAUTION
Use eye protection such as goggles when using
compressed air to dry cylinder components.
8. Wash parts in clean solvent. Dry parts with com-
pressed air. Do not wipe parts dry with paper towels or
cloth. Lint in a hydraulic system will cause damage.
9. Carefullyinspectinternalsurfaceoftubefordamage
(deep scratches, out--of--round, etc.). Inspect rod and
pistonforevidenceofexcessivescoring,pittingorwear.
Replace cylinder if internal damage or wear is found.
Assembly (Fig. 78)
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.
2. InstallnewO--ringsandsealstothepistonandhead.
3. Lubricate shaft with clean hydraulic oil. Slide head
onto shaft.
4. Install and tighten piston onto shaft. Torque piston
from 45 to 55 ft--lb (62 to 74 N--m).
5. Apply Loctite #242 (or equivalent) toset screws and
install set screws into piston. Torque set screws from 5
to 7 ft--lb (7 to 9 N--m).
6. Put a coating of clean hydraulic oil on all cylinder
parts to ease assembly.
7. Slide r od assembly into cylinder tube.
8. Mount steering cylinder in a vise with s oft jaws. Se-
cure head in barrel:
A. Align retaining ring hole in the head with the ac-
cess slot in the tube.
B. Inserttheretainingringhookintotheholeandro-
tate head clockwise until the retaining ring is com-
pletely pulled into the tube and the ring ends are
covered.
C. Apply silicone sealer to tube access slot.
Hydraulic
System
To Next Page
Loading...
Need help?
General
