Husqvarna ZTH6125A - Manual (Page 14)

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MAINTENANCE
9. Tire pressure: Check every 25 to 50 hours. All four tires require 15 psi.
10. Battery: Check every 25 hours. Check electrolyte level. If needed fill to the full line marked on
the side of the battery. Fill with distilled water. Do not try starting the engine with a weak battery.
Recharge or replace the battery. The engine condensers and electronic ignition can be dam-
aged internally with less than or more than the required 12 volts.
11. Belts: Check every 25 hours. Stop engine and remove key. Check the condition of all
belts. The pump belt located under the seat and rubber engine flap. The front deck belt and
the mule drive belt.
Front caster pivots
Front wheels
Deck lift blocks
12. Lubrication (every 25 hours): Park brake assemblies
Struts
Deck lift pivot
Pump idler pivot
Deck idler pivot
(Clean grease zerk thoroughly before greasing)
13. Fuel filter: Replace annually or as needed.
14. Hydraulic filter and oil: Change every 500 hours or yearly. Stop engine and remove key. Tilt
seat forward and clean around the filter and the fittings under the hydraulic tank. Remove the filter
and allow any oil to drain from the filter head. Then replace with new filter. Use only Husqvarna p/
n 539102606, filter which has a bypass valve it and the correct micron filter. Loosen hose from
fitting under hydraulic tank and allow tank to drain, reinstall hose to fitting. Fill tank with 20w - 50
motor oil to 1/4” to 1” below neck of tank and replace cap. Block up the rear of unit until wheels
will rotate freely and start engine at a slow idle, move the motion control levers forward and run for
several minutes. Stop engine and recheck oil level. If wheels don’t response an air lock has
occurred within the hydraulic system. Bleed air from lines, or let stand overnight to allow the air
time to dissipate out of the oil. Retry responses & check the oil level. Note: Serious damage to
the pumps and wheel motors can occur if the system is ran with an air lock. See the specification
sheet for the correct kind of oil. The factory uses Quaker State Deluxe Motor Oil 20w-50.
15. Caster swivel nuts: Check at 250 hours for tightness. Remove cotter pin and tighten castle
nut. Do not over tighten. Rotate nut back so a slot in the castle nut lines up with the hole in the
spindle and install cotter pin.