Wright Serial 54956 and higher - Manual (Page 26)

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Caster
Arms/Pins
Caster Wheel
Bearings
6.7 Bleeding Air from the Hydraulic System
Whenever servicing the hydraulic system, it is of the utmost importance to keep any dirt or debris from getting
into the system. Clean off all parts before disassembly and assembly. When any of the hydraulic parts are
disconnected or removed or when the oil is changed, air must be bled from the system. If air is entrained in
the system, loss of power, excessive heat, and damage to the hydraulic pumps may occur. First, make sure
the oil level in the reservoir is correct. The oil should be level with the bottom threads of the oil level port. Use
fully synthetic oil: Mobil1 15W-50. With the bypass valves open and the engine running, slowly move the
control levers back and forth five or six times. Now close the bypass valves and with the engine running,
slowly move the control levers back and forth five or six times. It may be necessary to repeat the above steps
until all the air is purged and the rear wheels are turning at normal speed. After purging is complete, adjust the
oil level in the reservoir if necessary.
6.8 How to Move the Mower if the Engine Won’t Start
Rotate both of the hydro bypass valve levers on the side of each hydraulic pump about ½ turn
counterclockwise. It is important not to over tighten these levers. Damage may occur to the pump if this valve
is over tightened.
6.9 Lubrication
Grease with No. 2 general purpose lithium base or molybdenum base grease.
•
Set parking brake, stop the engine and
remove the key.
•
Clean grease fittings with a rag.
•
Connect grease gun to fitting and
pump until grease begins to ooze out
from the bearings.
•
Wipe off excess grease.
•
Do not use spray lube of any kind on
choke and/or throttle cables.
• Service intervals:
o First 8 hours
o Every 25 hours
Also see Maintenance chart
Brake Handle
Pivot