Toro 4100-D service manual Disassembly Figs, Assembly Figs

Disassembly (Figs. 92 and 93)

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.Loosen head from barrel:

A.Use a spanner wrench to rotate head clockwise until the edge of the retaining ring appears in the bar- rel 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.

4.Extract shaft with head and piston by carefully twist- ing and pulling on the shaft.

IMPORTANT: Do not clamp vise jaws against the shaft surface. Protect shaft surface before mount- ing in a vise.

5.Mount shaft securely in a vise by clamping on the cle- vis of the shaft. Remove lock nut and piston from the shaft. Slide head off the shaft.

6.Remove and discard all seals and O--rings from the piston and the head.

7.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.

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 piston rod and piston for evidence of excessive scoring, pitting or wear. Replace any damaged parts.

Assembly (Figs. 92 and 93)

1.Make sure all cylinder components are clean before assembly.

2.Coat new seal kit components with clean hydraulic

oil.

A.Install new seals and O--rings to the piston.

B.Install new seals, O--ring and back--up ring to the head.

IMPORTANT: Do not clamp vise jaws against the shaft surface. Protect shaft surface before mount- ing in a vise.

3.Mount shaft securely in a vise by clamping on the cle- vis of the shaft.

A.Coat shaft with clean hydraulic oil.

B.Carefully slide head and piston onto the shaft. Secure piston to shaft with lock nut.

C.Torque lock nut to specification in Figure 92 (front deck cylinder) or Figure 93 (wing cylinder).

4.Lubricate head and piston with hydraulic oil. Careful- ly slide shaft 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.

Hydraulic System

Groundsmaster 4100--D Page 4 -- 133 Hydraulic System