Multi Pro 1200/1250 Hydraulic SystemPage 4 -- 35
Disassembly (Fig. 29)
1. Removeoilfromthesteeringcylinderintoadrainpan
by slowly pumping the cylinder shaft. Plug both ports
and clean the outside of the cylinder.
IMPORTANT: Prevent damage when clamping the
hydraulic cylinder into a vise. Do not close vise
enough to distort the barrel.
2. Mount end of steering cylinder in a v ise with soft
jaws. Remove retaining ring.
A. Use a spanner wrench to rotate head clockwise
untiltheedgeoftheretainingringappearsinthebar-
rel 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 barrel and head.
3. Remove plugs from ports. Extract shaft, head and
piston by carefully twisting and pulling on the shaft.
IMPORTANT: Do not clamp vise jaws against the
shaft surface. Protect shaft surface before mount-
ing in a vise.
4. Mountshaftsecurelyinavisebyclampingontheend
of the shaft. Remove lock nut and piston from the shaft.
Slide head off the shaft.
5. Remove Uni--ring and O--ring from the piston.
6. Remove O--ring, back--up ring, rod seal and dust
seal from the head.
Assembly (Fig. 29)
1. Make sure all parts are clean before assembly.
2. Coat new O--r ings, Uni--ring, rod seal and back--up
ring with with clean Dexron III ATF.
A. Install Uni --ring and O--ring to the piston.
B. Install O--ring, back--up ring, rod seal and dust
seal to the head.
IMPORTANT: Do notclamp visejaws againstthe
shaft surface. Protect shaft surface before
mounting in a vise.
3. Mountshaftsecurelyinavisebyclampingontheend
of the shaft.
A. Coat shaft with a light coat of clean Dexron III
ATF.
B. Slide headassembly ontotheshaft.Installpiston
and lock nut onto the shaft. Torque lock nut to 75 ft--
lb (102 N--m).
C. Remove shaft from the vise.
IMPORTANT: Prevent damage when clamping
the hydraulic cylinder into a vise. Do not close
vise enough to distort the barrel.
4. Mount end of the barrel in a vise.
5. Coat all internal parts with a light coat of clean Dex-
ron III ATF. Slide piston, shaft and head assembly into
the barrel being careful to not damage the seals.
6. Secure head into the barrel with retaining ring.
A. Align retaining ring hole in the head with the ac-
cess slot in the barrel.
B. Inserttheretainingringhookintotheholeandro-
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.
Hydraulic
System
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