Groundsmaster 7200/7210 Hydraulic SystemPage 4 - 99
Disassembly (Fig. 110)
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
hydraulic cylinder into a vise; clamp on the clevis
ONLY.
2. Mount lift cylinder in a vise. Use of a vise with soft
jaws is recommended.
3. Carefully remove collar with a pipe wrench.
4. 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. Clamp on the clevis ONLY.
5. Mount shaft securely in a vise by clamping on the cle-
vis of the shaft. Remove nut and piston from the shaft.
Slideheadofftheshaft.
6. Remove piston seal and O- ring from the piston. Re-
move O- ring, back- up ring, rod seal and dust seal from
the head.
Assembly (Fig. 110)
1. Make sure all parts are clean before reassembly.
2. Coat new O- rings, piston seal, rod seal, back- up
ring and dust seal with clean hydraulic oil.
A. Install piston seal and O- ring to the piston.
B. Install dust seal, O- ring, back- up ring and dust
seal to the head.
IMPORTANT: Do not clamp vise jaws against the
shaft surface. Clamp on the clevis ONLY.
3. Mount shaft securely in a vise by clamping on the cle-
vis of the shaft.
A. Coat shaft with clean hydraulic oil.
B. Slide head onto the shaft taking care to not dam-
age the seals. Install rod seal onto shaft and into
head.
C. Install piston onto the shaft and secure with nut.
D. Remove shaft from the vise.
IMPORTANT: Prevent damage when clamping the
hydraulic cylinder into a vise; clamp on the clevis
ONLY.
4. Mount barrel in a vise.
5. Coat all internal parts with a light coat of clean hy-
draulic oil. Carefully slide piston, shaft and head assem-
bly into the barrel being careful not to damage the seals.
6. Install collar using a pipe wrench to secure head in
barrel.
Hydraulic
System
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