Service and Repairs
General Precautions for Removing and Installing Hydraulic System Components
Before Repair or Replacement of Components
After Repair or Replacement of Components
1.
tem, empty Topdresser hopper and position machine on
a level surface.
Before removing any parts from the hydraulic sys-
1. If component failure was severe or if hydraulic sys-
tem is contaminated, drain entire hydraulic system.
Drain and flush all hoses and components. Also, change
oil filter.
2.
On Topdresser 2500 machines, chock Topdresser
wheels to prevent machine from moving while repairing
machine. If attached to tow vehicle, engage tow vehicle
parking brake, stop engine and remove key from the
ignition switch.
2. Lubricate O–rings and seals with clean hydraulic oil
before installing hydraulic components.
3.
Make sure caps or plugs are removed from the hy-
draulic hoses, hydraulic fittings and components before
reconnecting.
3.
Thoroughly clean Topdresser before disconnecting,
removing or disassembling any hydraulic components.
Make sure hydraulic components, hoses, connections
and fittings are cleaned thoroughly. Always keep in mind
the need for cleanliness when working on hydraulic
equipment.
4.
draulic hoses and fittings (see Hydraulic Fitting Installa-
tion in the General Information section of this chapter).
Use proper tightening methods when installing hy-
5.
After hydraulic repairs are completed, but before op-
erating the Topdresser, check oil level in the hydraulic
reservoir and add correct oil if necessary.
4.
tings or hydraulic components left open or exposed to
prevent hydraulic system contamination.
Put caps or plugs on any hydraulic lines, hydraulic fit-
6.
After disconnecting or replacing any hydraulic com-
ponent, operate machine functions slowly until air is out
of system. If an air lock has occurred (maybe caused by
partial drainage during disassembly), it may be neces-
sary to crack open the highest point hydraulic line near
the brush motor, while slowly operating the unit, to purge
air from the closed circuit.
5.
hoses for proper installation after repairs are completed.
Put labels on disconnected hydraulic lines and
6.
Note the position of hydraulic fittings (especially el-
bow fittings) on hydraulic components before removal.
Mark parts if necessary to make sure they will be aligned
properly when reinstalling hydraulic hoses.
7.
Check for hydraulic oil leaks and correct leaks if
found.
Check Hydraulic Lines and Hoses
Check hydraulic hoses daily for leaks, kinked lines,
loose mounting supports, wear, loose fittings, weather
deterioration and/or chemical deterioration. Make all
necessary repairs before operating the Topdresser.
WARNING
Keep body and hands away from pin hole leaks
or nozzles that eject hydraulic fluid under high
pressure. Use paper or cardboard, not hands, to
search for leaks. Hydraulic fluid escaping under
pressure can have sufficient force to penetrate
the skin and cause serious injury. If fluid is in-
jected into the skin, it must be surgically re-
moved within a few hours by a doctor familiar
with this type of injury. Gangrene may result from
such an injury.
Topdresser 1800 & 2500
Page 3 – 29
Hydraulic System
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