Husqvarna S427, Operator'S Manual

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MAINTENANCE

  WARNING!  To avoid injury, read 

and understand the entire 

Safety 

section 

before proceeding.

IMPORTANT  

Proper maintenance can 

prolong the life of unit. The following chart 
shows the recommended service schedule.

Interval

Task

Action

Each Use

Clean unit

Clean engine and hydraulic tank of all dirt and 

debris. DO NOT spray unit with water. Do not 

use solvents, hard cleaners, or abrasives.
NOTICE: Protect painted surfaces with 

automotive-type wax.

Check tires

See 

Specifications

 for correct tire pressure. See  

Tire Pressure

.

Check engine oil

Refer to engine manual.

Check hydraulic oil level

See 

Hydraulic Oil System

.

Check hydraulic lines

Check for leaking, kinked or damaged lines. 

Replace as necessary. See 

Hydraulic Oil 

System

.

Follow engine  

maintenance schedule

Perform scheduled engine maintenance. Refer 

to Engine Manual for detailed instructions.

50 Hours or  

Every Season

Check fasteners

Check all fasteners. Replace fasteners that are 

missing or damaged. Tighten all nuts and bolts 

to the correct torque value.

100 Hours or  

Every Season

Change hydraulic oil and 

filter

Drain oil from hydraulic tank, replace filter and 

refill tank with hydraulic oil. See 

Hydraulic Oil 

System

.

Check hydraulic drive 

coupling

Inspect hydraulic drive coupling for damage, 

wear or deterioration. Replace as necessary.

Check wheel bearings

Remove bearing dust caps and inspect and 

repack wheel bearings with grease. After 

packing bearings seat bearings by tightening 

the spindle nut snug. Loosen nut, spin wheel 

and retighten slightly until first slot in castle nut 

aligns with hole in hub. Ensure that wheel spins 

freely and replace cotter pin and dust cap. 

Wheel should spin freely with no wobble.

Engine

Drive 

coupling

Hydraulic 

pump