Wright Serial # 63495 and higher - Manual (Page 27)

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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 Spring Platform Adjustment
The factory setting is both springs set at the most forward position.
The more rearward the spring position, the stiffer the platform gets.
Adjustment will be to preference of feel. The two adjustment springs
should at all times, be positioned next to each other not one forward
or back more than the other. To adjust, loosen each spring retaining
bolt from the top just enough to slide it, then tighten with impact
wrench. The nut may spin using hand wrench. NOTE, do not loosen
too much, if the nut falls off, the foot platform will have to be removed
to reinstall.
There is an extra hole for a third spring for operators heavy enough
to bottom out the duel spring stock set up.
6.9 Lubrication
Grease with No. 2 general purpose lithium base or molybdenum base grease.
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Set parking brake, stop the engine and remove the key.
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Clean grease fittings with a rag.
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Connect grease gun to fitting and pump until grease begins to ooze out from the bearings.
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Wipe off excess grease.
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Do not use spray lube of any kind on choke and/or throttle cables.