Service Manual

Groundsmaster 360 Hydraulic SystemPage 4 − 129
IMPORTANT: When removing roll pin from front and
rear rods, make sure that rod surfaces are not dam-
aged.
7. Remove and discard roll pin (item 15) that secures
front rod to rear rod. Then remove rear rod (item 6), pis-
ton (item 5) and front head (item 2) from front rod.
8. Remove and discard seals, O−rings and wear ring
from piston and heads.
Inspection
CAUTION
Use eye protection such as goggles when using
compressed air.
1. Wash all cylinder components in solvent. Dry parts
with compressed air.
2. Inspect internal surface of barrel for deep scratches,
out−of−roundness and bending.
3. Inspect head, rods and piston for excessive pitting,
scoring and wear.
4. Check re−phasing valve in piston that exists to allow
synchronization of the front and rear steering cylinders.
Poppet valves should not be stuck in piston. If valves are
stuck or damaged, replace piston assembly.
5. Replace steering cylinder if internal components are
found to be worn or damaged.
Assembly (Fig. 145)
1. Use a new seal kit to replace all seals, O−rings and
wear ring to piston and heads. Apply clean hydraulic oil
to all seal kit components before installing.
2. Install front head (item 2) with new seals onto front
rod (item 4) being careful to not damage head seals dur-
ing installation.
IMPORTANT: Make sure to not damage O−ring (item
7) as piston is installed over roll pin hole in front rod.
3. Install piston (item 5) with new seal, O−ring and wear
ring onto front rod.
IMPORTANT: When installing roll pin into front and
rear rods, make sure that rod surfaces are not dam-
aged.
4. Slide rear rod onto front rod and align roll pin holes
in rods. Install new roll pin (item 15) to secure rods.
IMPORTANT: Prevent damage when clamping the
cylinder’s barrel into a vise; clamp on the clevis
only. Do not close vise on barrel or rods.
5. Mount steering cylinder barrel in a vise equipped
with soft jaws by clamping on the barrel clevis.
6. Coat all internal cylinder components with clean hy-
draulic oil. Slide rod assembly into barrel, being careful
to not damage seals during installation.
7. Insert rear head with new seals into the barrel being
careful to not damage head seals during installation.
8. Secure front and rear heads in barrel with external
collars. Tighten collars with spanner wrench.
Hydraulic
System