100
SR460/620
SR820
5.6.3.12 Inspect the hydraulic rams condition. If the
hydraulic ram port adaptors and seals are
serviceable, they can be removed and
installed on the replacement ram.
5.6.3.13 Measure the distance between the cylinder
pin holes and extend the new cylinder to
that length.
5.6.3.14 Install the cylinder in place and install both
cylinder pins and retaining bolts in place.
5.6.3.15 Ensuring that you are still wearing suitable safety glasses and impenetrable gloves, reconnect the
hydraulic hose(s) to the cylinder and tighten the fittings.
5.6.3.16 Reconnect the implement hoses to the tractor.
5.6.3.17 Get into the tractor seat and fasten your seat belt. Clear the area of all persons before attempting to
raise the centre deck and ram. From the tractor seat, start the tractor and operate the control valve to
raise the deck.
5.6.3.18 Look for signs of oil leaks. If an oil leak exists, shut the tractor down and remove all oil pressure in the
lines by moving the valve control handles back and forward.
Retighten any loose fittings and connections and if a hose is leaking, replace the hose with a new
hose.
5.6.3.19 If there are no leaks, raise and lower the deck completely at least three full cycles to remove any air
trapped in the circuit
5.6.3.20 Check the hydraulic reservoir of the tractor to ensure there is sufficient oil.
5.6.3.21 If the machine is planned to be used straight after, inspect the machine to ensure that it will achieve a
level cut. See Section 4.7 for guidance on levelling the machine.
5.6.4 Hoses
Equipment Required
See Section 5.6
Replace pinched and broken hydraulic hoses at once. Tighten any hydraulic fitting with fluid leaking from it. If
fluid still leaks, loosen the fitting, apply a pipe thread compound to the threads and tighten. Care must be
exercised when tightening hydraulic fittings. Too much tightening can cause the fittings to crack and require
replacement fittings.
Hydraulic hose fitting torque setting are found in Section 5.9.2.
Although a small amount of oil will present from bleeding at all hydraulic fittings, significant amount of oil leaking
from around the breather plug on the cylinder indicates that the seal in the cylinder is worn out. Replace the
seals in the cylinder immediately before the cylinder is damaged or too much hydraulic fluid is lost.
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